WO2015045537A1 - Extrusion die for forming hollow material - Google Patents

Extrusion die for forming hollow material Download PDF

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Publication number
WO2015045537A1
WO2015045537A1 PCT/JP2014/067285 JP2014067285W WO2015045537A1 WO 2015045537 A1 WO2015045537 A1 WO 2015045537A1 JP 2014067285 W JP2014067285 W JP 2014067285W WO 2015045537 A1 WO2015045537 A1 WO 2015045537A1
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WO
WIPO (PCT)
Prior art keywords
billet
shape
extrusion die
hole
hollow
Prior art date
Application number
PCT/JP2014/067285
Other languages
French (fr)
Japanese (ja)
Inventor
沛征 林
雄次 望月
Original Assignee
日本軽金属株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本軽金属株式会社 filed Critical 日本軽金属株式会社
Priority to US15/023,201 priority Critical patent/US20160228932A1/en
Priority to CN201480053079.2A priority patent/CN105579159A/en
Publication of WO2015045537A1 publication Critical patent/WO2015045537A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/02—Dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/14—Making other products
    • B21C23/142—Making profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/04—Mandrels

Definitions

  • the present invention relates to an extrusion die for forming a hollow shape, and more specifically, a high-strength alloy, in particular, a high-strength aluminum alloy such as a so-called 7000 series is extruded to form a hollow shape with a partition wall provided therein.
  • the present invention relates to an extrusion die for forming a hollow shape.
  • extrusion of aluminum alloy or the like is widely used at present because it has a high degree of freedom in cross-sectional shape and is excellent in obtaining a hollow shape material to be extruded. That is, products by extrusion are widely used as strength members for structural materials, machine parts, and the like, and high strength alloys such as so-called 7000 series such as 7075, 7N01, 7003, etc. There is an increasing demand for extruded members made of aluminum alloys.
  • a hollow material to be extruded recently, in addition to a rectangular tube shape, those having a complicated cross-sectional shape such as a square shape of a cross-section and a shape of an eye-shape have been produced.
  • a manufacturing method and a manufacturing apparatus for a metal three-dimensional extrusion material are known (for example, see Patent Document 1).
  • This metal three-dimensional extruded material manufacturing method and manufacturing apparatus are configured to be able to form a three-dimensional extruded material in which a hollow portion and a solid portion are mixed in the length direction.
  • a hollow material extrusion die that forms a hollow material having a partition wall is also known (see, for example, Patent Document 2).
  • This extrusion die is configured so as to be able to form a hollow material having a horizontally long cross-sectional shape or a cross-sectional shape.
  • hollow shapes such as the cross-sectional shape of the shape of the cross section
  • the hollow shape of a more complicated cross-sectional shape such as
  • a hollow shape member or a hollow shape member having a partition wall having a curved cross section In the case of a hollow section with a cross-sectional shape, a billet made of an aluminum alloy that is fed from the upstream side and extruded because the cross-shaped partition walls that form the shape of the cross intersect each other at the center. However, it is difficult to flow in the direction orthogonal to each other from the intersection. Therefore, the problem that the cross-shaped partition wall which has an intersection part cannot fully be formed arises.
  • a high-strength alloy having a large extrusion processing force in particular, a hollow type in which a billet made of a high-strength aluminum alloy such as a so-called 7000 series is extruded and a partition wall is provided inside. It is an object of the present invention to provide an extrusion die for forming a hollow material capable of easily forming a material.
  • the hollow die forming extrusion die of the present invention is a male die for forming the inner shape of a hollow shape member while guiding a billet made of an aluminum alloy fed from the upstream side toward the downstream side.
  • An extrusion die for forming a hollow member comprising a member and a female member that holds the male member at the outer peripheral portion and forms the outer shape of the hollow member,
  • the male member is composed of a mandrel part for forming the inner shape, and a holder part integrally connected to the outer peripheral part of the mandrel part via a plurality of bridge parts,
  • a billet guide hole for guiding a part of the billet toward the downstream side is provided in a central region of the mandrel part, and an upstream opening area of the billet guide hole is formed larger than an opening area of the downstream opening part,
  • a continuous partition wall is formed inside the hollow shape member while maintaining a billet inflow gap space that forms a merge space with the billet flowing in from each bridge portion side on the downstream side of the billet guide hole toward
  • the extrusion die for forming a hollow shape material of the present invention is configured as described above, a part of the billet joins with the billet flowing from the bridge portion side through the billet guide hole provided in the central region of the mandrel portion. Then, it is pushed out from the billet inflow gap space maintained toward the downstream side. Since the billet extruded from the billet guide hole is pushed toward the position of the partition wall portion of the hollow shape member formed by the plurality of inner molding pieces, the cross section of the complex shape, for example, the intersection of the partition wall or It reaches the curved part of the curved partition wall enough.
  • a high-strength alloy having a large extruding force in particular, a billet made of a high-strength aluminum alloy such as a so-called 7000 series can be extruded to easily form a hollow member provided with a partition wall.
  • FIG. 3 is a longitudinal sectional view taken along line III-III in FIG. 2, showing a state in which the holder and the bridge outer peripheral surface are integrally formed by a bridge press-fit structure, and the billet guide hole has a two-stage configuration. is there.
  • FIG. 4 is a partial cross-sectional view taken along line IV-IV in FIG. 3.
  • FIG. 2 is a cross-sectional perspective view of the male member and the female member of the first embodiment, and is an overall view of FIG. 1. It is a whole top view which shows the surface of the female type
  • FIG. 3 shows a second embodiment of an extrusion die for forming a hollow material according to the present invention, in which a holder and an outer peripheral surface of a bridge are integrally formed by a bridge portion press-fitting structure, and a billet guide hole has a tapered shape. It is a longitudinal cross-sectional view corresponding to. FIG.
  • FIG. 9 is a cross-sectional perspective view of the male member and the female member in FIG. 8. It is a whole top view which shows 3rd Embodiment of the extrusion die for hollow shape molding which concerns on this invention.
  • FIG. 11 is a vertical cross-sectional perspective view taken along line XI-XI in FIG. 10, showing a state in which the holder and the outer peripheral surface of the bridge are integrally formed by a bridge portion shrink-fitting structure and the billet guide hole has a two-stage configuration.
  • FIG. 11 is a vertical cross-sectional perspective view taken along line XI-XI in FIG. 10, showing a state in which the holder and the outer peripheral surface of the bridge are integrally formed by a bridge portion shrink-fitting structure and the billet guide hole has a two-stage configuration.
  • FIG. 10 is a general plan view showing a fifth embodiment of an extrusion die for forming a hollow material according to the present invention, in which a holder and a bridge outer peripheral surface are integrally formed by a bridge portion shrink fitting structure. It is a longitudinal cross-sectional perspective view along the XIV-XIV line
  • FIG. 15 is a partial cross-sectional view taken along line XV-XV in FIG. 14.
  • FIG. 18 is a longitudinal sectional perspective view taken along line XVIII-XVIII in FIG. 17.
  • FIG. 19 is a partial cross-sectional view taken along line XIX-XIX in FIG. 18. It is a perspective view which shows the hollow shape material of a cross-sectional lattice shape shape
  • FIG. 22 is a longitudinal sectional perspective view taken along line XXII-XXII in FIG. 21.
  • FIG. 23 is a partial cross-sectional view taken along line XXIII-XXIII in FIG. It is a perspective view which shows the hollow shape material of a cross-sectional lattice shape from which the thickness of the partition wall shape
  • FIG. 25A is a schematic view showing a hollow shape member having a curved partition wall formed by using the eighth and ninth embodiments of the hollow shape forming extrusion die according to the present invention.
  • FIG. It is a schematic diagram which shows the hollow shape member which has a curved partition wall shape
  • FIG. 14 It is a longitudinal cross-sectional perspective view which shows the modification of 5th Embodiment (FIG. 14) which concerns on this invention.
  • the extrusion die 10 of the first embodiment is for molding a hollow material made of a high-strength alloy, particularly a high-strength aluminum alloy so-called 7000 series. And in this extrusion die 10, the cross shape which has the cross
  • the hollow section 1 having a square cross-sectional shape provided with partition walls 1b, 1b provided in a shape is formed.
  • the extrusion die 10 has a mandrel portion 23 for forming the inner shape of the hollow shape member 1 while guiding the billet B made of an aluminum alloy extruded from the upstream side toward the downstream side.
  • the male member 20 and a female member 30 that holds the male member 20 at the outer periphery and molds the outer shape of the hollow member 1 are provided.
  • the male member 20 includes the mandrel portion 23 and a holder portion 25 integrally connected to the outer peripheral portion of the mandrel portion 23 via a plurality of bridge portions 24.
  • the holder portion 25 is formed in an overall disk shape having a predetermined thickness, and the upstream end surface in the extrusion direction is divided by the bridge portions 24. However, as a whole, the holder portion 25 is used for introducing a circular billet. An opening 25B is formed.
  • a billet guide hole 28 for guiding a part of the billet B toward the downstream side is provided in the central region of the mandrel portion 23 as will be described in detail later.
  • the upstream opening area 28A of the billet guide hole 28 is formed larger than the opening area of the downstream opening 28B.
  • the billet insertion hole BH1 (billet inflow gap space) that forms a merge space with the billet B flowing in from each bridge portion 24 side on the side facing the downstream opening of the billet guide hole 28 is located downstream, that is, a female.
  • a plurality (four in this embodiment) of inner molding pieces 23B are fixedly mounted at positions where the partition wall having the crossing portion X is formed inside the hollow shape member 1 while maintaining the mold member 30 side. Yes.
  • the inner molding piece 23B is provided on the mandrel part 23 via a connecting part 23M.
  • the female mold member 30 facing the outer peripheral surface of the entire four inner molding pieces 23, the female mold member 30 is provided with an outer molding die hole 30 ⁇ / b> B that forms the outer shape of the plurality of hollow profiles 1.
  • the extrusion die 10 is formed in a cylindrical shape as a whole.
  • the extrusion die 10 includes the male member 20 and the female member 30 and a back die 70 that holds the female member 30.
  • the billet B is accommodated in the billet extrusion apparatus 80 which consists of a chamber etc. which are arrange
  • FIG. 1 the billet extrusion apparatus 80 which consists of a chamber etc. which are arrange
  • the male member 20, the female member 30, and the back die 70 are integrally connected. That is, after the male member 20 and the female member 30 are positioned by, for example, two positioning pins 71 as shown in FIGS. 2 and 3, the male member 20, the female member 30, and the back The die 70 is connected and fixed by, for example, two connecting bolts 72.
  • the male member 20 includes a spider 22, and the spider 22 includes a mandrel portion 23 that forms the inner shape of the hollow shape member 1, and the mandrel portion 23.
  • a bridge portion 24 that supports and protrudes outward from the periphery of the mandrel portion 23 in a substantially X shape, and a holder portion 25 that is integrally connected via the bridge portion 24 are configured.
  • the bridge section 24 is composed of four parts, a first bridge 24a, a second bridge 24b, a third bridge 24c, and a fourth bridge 24d, arranged in a clockwise direction.
  • a space between the bridges 24a to 24d is a billet introduction space S.
  • the upper surface portion 23A of the mandrel portion 23 is formed in a circular flat surface, and the upper surface portions of the bridges 24a to 24d are continuous with the upper surface portion 23A.
  • the upper surface portion of each of the bridges 24 a to 24 d is formed in an inclined shape that becomes lower from the upper surface portion 23 A of the mandrel portion 23 toward the inner peripheral surface of the holder portion 25. Further, the upper surface portion 23A of the mandrel portion 23 is flush with the upper end surface 25A (see FIGS. 3 and 5) of the holder portion 25 when the spider 22 and the holder portion 25 are assembled together. .
  • each bridge 24 a to 24 d is engaged with the bridge seating surface 26 ⁇ / b> B of the bridge holding portion 26 in the holder portion 25. That is, the holder portion 25 is formed at the upper end portion of the holder portion 25, and has a bridge presser portion 26A for pressing the top end surface portion 24B (see FIG. 3) of each bridge 24a to 24d, and the bridge presser portion 26A.
  • the bridge receiving seat surface 26B that is continuous and formed substantially equal to the width of the bridge 24a or the like (preferably slightly wider) is provided corresponding to each of the bridges 24a to 24d.
  • a flat prismatic fixing member 27 is driven into the bridge holding portion 26A so that the bridges 24a to 24d do not rotate. As shown in FIG. 5, the fixing member 27 is positioned between the bridge holding portions 26A and the upper portions of the bridges 24a to 24d after accurately positioning the bridges 24a to 24d and the bridge holding portions 26A. The member 27 is driven into the driving hole from above.
  • the engaging surfaces of the outer peripheral surfaces 24A of the bridges 24a to 24d and the bridge seating surface 26B of the holder portion 25 are inclined so as to approach the center of the die from the upstream side to the downstream side in the pushing direction. Formed on the surface. Therefore, the moment generated at the action point of extrusion in the inner molding piece 23B described below can be reduced, and thereby the strength of each of the bridges 24a to 24d can be increased. As a result, breakage of each of the bridges 24a to 24d can be prevented.
  • the outer peripheral surfaces 24A of the bridges 24a to 24d and the bridge seating surface 26B of the holder portion 25 are integrated by press-fitting that constitutes the bridge portion press-fitting structure M.
  • the lower ends of the bridges 24a to 24d are located at a position away from the holder receiving surface 30A of the female member 30 by a predetermined dimension, from which the mandrel 23 It is formed in a shape that is connected to a plurality (four in the embodiment) of inner molding pieces 23B that form the inner shape of the hollow shape member 1 (see FIG. 7) via the connecting portion 23M.
  • the lower ends of the bridges 24a to 24d are respectively connected to the lower ends of the bridges 24a to 24d at the lower end of the bridge receiving surface 26B of the holder 25 and the holder receiving surfaces 30A of the female member 30.
  • a tunnel-shaped billet insertion hole BH is formed.
  • This billet insertion hole BH constitutes a billet merging space where billets B introduced from the billet introduction space S for introducing each billet B join together, as indicated by arrows. Therefore, the billet B is introduced from the billet introduction space S for introducing each billet B, merged at the billet insertion hole BH, and pushed out downstream.
  • the four inner molding pieces 23 ⁇ / b> B are provided at the downstream end of the billet B flow of the mandrel portion 23.
  • Each of these inner molding pieces 23B is formed in a substantially rectangular shape, and is provided at the lower end portion of the mandrel portion 23 via the connecting portion 23M as described above (see also FIG. 4).
  • the four inner molding pieces 23B protrude to the female mold member 30 side, and as shown in detail in FIGS. 4 and 6, the inner molding pieces 23B are formed in the outer molding die hole 30B. To be inserted.
  • the female member 30 is formed in a size that is opposed to the outer peripheral surface of the entire four inner molding pieces 23B and that has a predetermined gap L1.
  • Each inner molding piece 23B is inserted into the outer molding die hole 30B of the female mold member 30, and the outer periphery of each inner molding piece 23B and the outer molding die hole 30B.
  • the gap L1 having the predetermined dimension set between the two is a shape member outer forming hole 50 (see FIGS. 1, 3 and 5).
  • the outer forming die hole portion 30 ⁇ / b> B is formed by a linear portion having a slight size and a relief hole portion 30 ⁇ / b> C that expands from the straight portion toward the outer peripheral direction of the female member 30. .
  • Each of such inner molding pieces 23B forms four internal spaces 1S of the hollow section 1 having a cross-sectional shape as shown in FIG. 7, and four inner molding pieces are formed. As shown in FIG. 4, the pieces 23 ⁇ / b> B are arranged so as to be substantially rectangular.
  • each inner forming piece 23B is provided at the end of the shape inner forming portion 23 on the downstream side in the extrusion direction via the connecting portion 23M. As shown in FIG. 1, a strip-shaped flange portion 23F projecting outward from the outer periphery of each inner forming piece 23B is provided so as to wind around the outer periphery of each inner forming piece 23B. ing.
  • a gap L2 having a predetermined dimension is formed between the opposing flange portions 23F of the inner molding pieces 23B adjacent to each other.
  • the gap L2 forms the shape forming inner hole 51 for forming the cross-shaped partition walls 1b, 1b of the hollow shape 1.
  • each flange portion 23F of each inner molding piece 23B is disposed opposite to the outer molding die hole portion 30B formed in the female mold member 30.
  • a gap L1 having the predetermined dimension is formed between the two, and the shape forming outer hole 50 for forming the outer peripheral walls 2a, 2a of the hollow shape 1 by the gap L1. Is configured.
  • each flange portion 23F of each inner molding piece 23B is flush with the holder portion receiving surface 30A of the female member 30 as shown in FIGS. Therefore, the billet B is pushed out from the billet insertion hole BH via the side surface of the connecting portion 23M of the mandrel portion 23 and also along the upper end surface of each flange portion 23F.
  • one intersection X is formed by the two partition walls 1b and 1b. Therefore, the billet introduction space S for introducing the billet B, the billet insertion hole BH, and the billet B extruded from the billet insertion hole BH1 alone may not reach the intersection X.
  • the billet guide hole 28 for guiding a part of the billet B toward the downstream side is provided in the central region of the mandrel portion 23. It becomes the composition.
  • the billet guide hole 28 is provided corresponding to the intersection X of the partition walls 1b and 1b.
  • the upstream opening area located in the inflow side of the billet B of the mandrel part 23 is formed larger than the opening area of the downstream opening part located in the outflow side of the billet B.
  • a billet insertion hole BH1 constituting a billet introduction gap space is provided on the side facing the downstream opening of the billet guide hole 28 and between the facing surfaces of the connecting portion 23M.
  • This billet insertion hole BH1 constitutes a billet joining space for joining the billet B introduced into the billet introduction space S into which the billet B is introduced.
  • the billet B introduced from the billet guide hole 28 is inserted into the billet insertion hole BH1. It is extruded through the hole BH1.
  • the billet guide hole 28 of the first embodiment has a large opening hole portion formed in the upstream diameter ⁇ ⁇ b> 1 having a step portion in the middle of the mandrel portion 23. 28A and a small opening hole 28B formed in a diameter ⁇ 2 for introducing a part of the billet B on the lower side of the mandrel 23, that is, on the crossing portion X side of the partition walls 1b and 1b. Therefore, a part of the billet B fed from the upstream side and extruded is guided by the large opening hole 28A and reliably introduced into the small opening hole 28B.
  • the thickness of the small opening hole portion 28B can be increased in the mandrel portion 23, and the die is pressed against the stress during extrusion.
  • the strength of can be increased. As a result, it is possible to prevent the die from cracking.
  • each corner portion of each flange portion 23F gathers, and the position of the intersection P corresponds to the intersection portion X formed by the partition wall. Further, the position of the small opening hole 28B is set so that the position of the intersection point P and the center of the small opening hole 28B of the billet guide hole 28, which will be described in detail later, coincide.
  • the billet B is fed into the male member 20 by the billet extrusion device 80 disposed on the upstream side in the extrusion direction of the billet B and pushed out, the billet B is first of the male member 20. While being introduced into the billet introduction space S for introducing the billet B formed by the gap between the mandrel part 23 and the bridge part 24 and the holder part 25, a part is introduced into the large opening hole part 28 ⁇ / b> A of the billet guide hole 28.
  • the billet B introduced into the billet introduction space S includes the side surfaces of the first to fourth bridges 24a to 24d, the side surface of the profile member inner molding portion 23, the billet insertion hole BH, the billet insertion hole BH1, and the inner molding pieces. It is guided from the upper surface portion of the flange portion 23F of 23B to the outer member 50 for forming a shape member and is extruded from the outer hole portion 50 for forming a member. On the other hand, a part of the billet B introduced into the large opening hole portion 28A of the billet guide hole 28 is guided by the large opening hole portion 28A and reliably introduced into the small opening hole portion 28B. At this time, the billet B from the billet insertion hole BH1 also joins and is extruded.
  • the extruded hollow profile 1 is fed from a profile feed hole 70A formed in the back die 70, and then held by a holding mechanism (not shown) and carried into a predetermined stockyard or the like.
  • the hollow shape member 1 is composed of outer peripheral walls 1a, 1a having a quadrangular cross section and cross-shaped partition walls 1b, 1b provided inside the outer peripheral walls 1a, 1a, and these partition walls 1b, 1b. A central portion where the two intersect with each other is an intersection X. Therefore, the hollow shape member 1 has a cross-sectional shape having four spaces 1S inside.
  • the hollow section 1 having such a cross-sectional shape is formed by continuously extruding the billet B from the outer shape forming hole 50 and the inner shape forming hole 51 of the extrusion die 10. It has become so.
  • a part of the billet B sent from the upstream side is sent from the billet guide hole 28 provided in the central region of the mandrel part 23 to each of the flange parts 23F of the four inner molding pieces 23B. It is pushed out toward the intersection P where the corners gather.
  • the position of the intersection P corresponds to the intersection X formed by the partition wall, and furthermore, the intersection P and the center of the small opening hole 28B of the billet guide hole 28 coincide with each other on the same line.
  • the billet B that has passed through the small opening hole 28B is extruded through the intersection point P. Therefore, the intersection X can be easily formed.
  • a high-strength alloy having a large extrusion processing force in particular, a billet made of a high-strength aluminum alloy such as a so-called 7000 series can be extruded to easily form a hollow shape member provided with a complex-shaped partition wall. .
  • the billet guide hole 28 has a two-stage configuration of a large opening hole 28A formed on the upper side of the mandrel part 23 and a small opening hole 28B formed on the lower side of the mandrel part 23. A part of the billet B extruded from the upstream side is guided by the large opening hole 28A and reliably introduced into the small opening hole 28B. As a result, a sufficient billet for forming the partition wall can be secured.
  • the shape of the billet guide hole 28 of the extrusion die 10 has a two-stage structure of a large opening hole 28A and a small opening hole 28B.
  • the die 11 is a billet guide hole 38 having a tapered hole.
  • other members, structures, etc. are exactly the same as those of the extrusion die 10 of the first embodiment. Therefore, the same structure and the same members as those of the first embodiment are denoted by the same reference numerals, and only different portions will be described.
  • the mandrel portion 23 is different only in the shape of the billet guide holes 28 and 38, the second embodiment will be described with the same reference numeral 23 as in the first embodiment.
  • the billet guide hole 38 of the extrusion die 11 of the second embodiment is formed in a taper shape whose shape decreases from the upstream opening of the mandrel 23 toward the downstream opening.
  • the diameter ⁇ 1 of the upstream opening of the mandrel part 38 is substantially equal to the diameter ⁇ 1 of the large opening hole 28A of the first embodiment
  • the diameter ⁇ 2 of the downstream opening of the tapered hole is It is substantially equal to the diameter ⁇ 2 of the small opening hole 28B of the first embodiment.
  • the respective corners of the flange portions 23F of the four inner molding pieces 23B are gathered.
  • the position of the intersection point corresponds to the intersection X formed by the partition wall, and the billet guide hole 38 so that the position of the intersection point coincides with the center of the billet guide hole 38.
  • the position of is set.
  • the hollow section 1 having a cross-sectional shape shown in FIG. 7 can be formed in the same manner as the extrusion die 10 of the first embodiment.
  • the lower part of the first to fourth bridges 24a to 24d of the bridge part 24 and the lower part of the bridge seating surface 26B go to the female member 30 side. While it inclines in the direction which approaches the die center side, they were the structures engaged by the bridge part press-fit structure M.
  • the distal end outer peripheral surface 34A of the first to fourth bridges 34a to 34d of the bridge portion 34 that supports the mandrel portion 33 and the bridges 34a to 34d are held.
  • a part of the inner peripheral surface of the holder part 125 is integrated with the bridge part shrink fitting structure N.
  • shrink fitting is a method of obtaining a strong joint using heat, by heating and expanding a member such as a disc with a hole, and inserting a shaft made slightly larger than the diameter of the hole, It is a method of fitting that is cooled and fixed, and is used as a fastening type joint. Then, both of them (in the above example, the disk and the shaft) are fixed by shrink fitting.
  • the male member 120 of the extrusion die 12 of the third embodiment has substantially the same shape as the extrusion dies 10 and 11 of the first and second embodiments, but the bridge formed in the extrusion die 10 and the like. The shape is different only in that the holding portion 26A is not provided.
  • the spider 32 includes the mandrel portion 33 corresponding to the inner shape of the hollow shape member 1 and a bridge portion 34 that supports the mandrel portion 33 and supports the mandrel portion 33.
  • the bridge portion 34 is composed of a plurality of protrusions that protrude outwardly from the periphery of the mandrel portion 33 in a substantially X shape, that is, a first bridge 34a, a second bridge 34b, a third bridge 34c, and a fourth bridge 34d.
  • the space between the bridges 34a to 34d is the billet introduction space S.
  • the billet guide hole 28 for guiding a part of the billet B toward the downstream side is provided.
  • the billet guide hole 28 is formed corresponding to the intersection X of the partition walls 1b and 1b.
  • the billet guide hole 28 is comprised by the large opening hole part 28A and the small opening hole part 28B as mentioned above.
  • the billet guide hole 28 has the same configuration as the billet guide hole 28 in the extrusion die 10 of the first embodiment.
  • a support member 36 that is a bridge holding mechanism for supporting each bridge 34a to 34d is interposed. Both ends of the support member 36 are fixed across the lower ends of the bridges 34 a to 34 d and the holder receiving surface 30 A of the female member 30.
  • a gap corresponding to the height dimension of the support member 36 is formed between the lower ends of the bridges 34a to 34d and the holder receiving surface 30A of the female member 30.
  • the gap serves as a tunnel-shaped billet insertion hole BH through which billets B introduced into adjacent bridge insertion spaces S are inserted.
  • the billet insertion hole BH has a function similar to that of the billet insertion hole BH of the first embodiment, and constitutes a billet merge space and a billet inflow gap space.
  • each piece 33B is provided with a flange portion 33F.
  • Each inner molding piece 33 ⁇ / b> B protrudes toward the female mold member 30 and is inserted into the outer molding die hole 30 ⁇ / b> B formed in the female mold member 30.
  • Such an inner molding piece 33B forms four internal spaces 1S of the hollow section 1 having a cross-sectional shape as shown in FIG.
  • These inner molding pieces 33B are formed in a rectangular shape having substantially the same shape as the inner molding pieces 23B of the first and second embodiments, and are arranged in a square shape.
  • the hollow section 1 having a cross-sectional shape shown in FIG. 7 can be formed.
  • each bridge 34a to 34d Since the outer peripheral surface 34A of each bridge 34a to 34d and a part of the inner peripheral surface of the holder portion 125 are integrally formed by the bridge portion shrink-fitting structure N, each bridge 34a to 34d, The strength of the mandrel portion 33 can be secured, and the pressure at the time of extrusion of the billet B can be received by the entire male member 20.
  • Support members 36 are fixed to the lower ends of the bridges 34a to 34d across the lower ends and the holder receiving surface 30A of the female member 30, and a gap corresponding to the height dimension of the support members 36 is provided. Is formed.
  • the support member 36 can form a tunnel-shaped billet insertion hole BH through which billets B introduced into adjacent bridge insertion spaces S are inserted, and can support the bridges 34a to 34d. Two roles can be played, and the member can be used effectively.
  • the shape of the billet guide hole 38 is different from the billet guide hole 28 in the extrusion die 12 of the third embodiment.
  • the shape of the billet guide hole 38 is the same as the shape of the billet guide hole 38 of the extrusion die 11 of the second embodiment.
  • Other members, structures and the like are exactly the same as those of the extrusion die 12 of the third embodiment. Therefore, the same structure and the same members as those of the third embodiment are denoted by the same reference numerals, and only different portions will be described.
  • the billet guide hole 38 of the extrusion die 13 according to the fourth embodiment is formed in a tapered shape whose shape decreases from the upstream opening of the mandrel 33 toward the downstream opening.
  • the hollow section 1 having a cross-sectional shape shown in FIG. 7 can be molded. .
  • the tip outer peripheral surface 44A of each bridge 44a to 44d and a part of the inner peripheral surface of the holder portion 125 are It is fixed integrally by the fitting structure N, and the strength of each bridge 44a to 44d and the mandrel portion 43 is ensured.
  • the configuration of the billet guide hole 48 is different from the configuration of the billet guide holes 28 and 38 in the extrusion dies 12 and 13 of the third and fourth embodiments, but other members, structures, etc. Is exactly the same as the extrusion dies 13 and 14 of the third and fourth embodiments. Therefore, the same structure and the same members as those of the third and fourth embodiments are denoted by the same reference numerals, and only different portions will be described.
  • the extrusion die 14 of the fifth embodiment is configured such that a cross-sectional lattice-shaped hollow shape member 2 having four intersecting portions X as shown in FIG. 16 can be formed.
  • the male member 120 includes a mandrel portion 43 that forms the inner shape of the hollow shape member 2 and a bridge portion that supports the mandrel portion 43 and protrudes outward from the periphery of the mandrel portion 43 in a substantially X shape.
  • the spider 42 is configured to be integrally connected to the holder portion 125 via the bridge portion 44.
  • the bridge portion 44 is composed of four pieces, a first bridge 44a, a second bridge 44b, a third bridge 44c, and a fourth bridge 44d, which are arranged clockwise.
  • a space between the bridges 44a to 44d is a billet introduction space S for introducing the billet B.
  • the billet guide hole 48 includes a large opening hole 48 ⁇ / b> A formed on the upstream side of the mandrel part 43, and the downstream side of the mandrel part 43, that is, the partition wall 1 b of the hollow profile 2. It has a two-stage configuration with a small opening hole 48B corresponding to a position where the intersecting portion X of 1b can be formed.
  • the large opening hole 48A has a substantially square shape in plan view and is formed in a recessed shape with a predetermined dimension on the lower side of the mandrel portion 43. A plurality (four in the embodiment) of the bottom surface of the large opening hole 48A are formed.
  • a small opening hole 48B is formed. The small opening hole 48B is formed from the bottom surface portion of the large opening hole 48A toward the downstream side of the mandrel portion 43.
  • nine inner molding pieces 43B are provided so as to correspond to the four intersecting portions X.
  • These inner molding pieces 43B are formed in a rectangular shape having substantially the same shape as the inner molding piece 23B of the extrusion die 10 of the first embodiment, and are connected to the lower part of the mandrel 43 in the same configuration as the connecting portion 23. It is provided via the part.
  • the shape forming inner hole 51 is constituted by the gap L2 between the inner forming pieces 43B. Further, the nine inner molding pieces 43B are inserted into the outer molding die hole portion 130B of the female die 130.
  • the mandrel 43 has substantially the same size as the mandrel portions 33 and 33 of the extrusion die 13 of the fourth embodiment, and there are nine inner sides in the mandrel portion 43.
  • a molding piece 43B is provided. Therefore, the size of each of the inner molding pieces 43B is formed smaller than the size of each of the four inner molding pieces 33B of the extrusion die 13 of the fourth embodiment. When each of the inner molding pieces 43B is formed to be large, the mandrel 43 may be enlarged.
  • the positions of the intersection points P correspond to the intersection portions X formed by the partition walls. Further, the positions of the small opening holes 48B are set so that the positions of the four intersection points P and the centers of the small opening holes 48B of the four billet guide holes 48 coincide with each other. Yes.
  • the hollow shape member 2 is formed of two pairs of outer peripheral walls 2a and 2a that are formed in a quadrangular cross section and are arranged to face each other, and two vertical and horizontal partition walls 2b and 2b provided inside the hollow shape member 2
  • the cross-sectional lattice shape has nine spaces 2S.
  • the crossing part X where the partition walls 2b and 2b cross is provided in four places.
  • board thickness dimension of the partition walls 2b and 2b is the same.
  • the extrusion die 15 of the sixth embodiment is different from the extrusion die 14 of the fifth embodiment only in the shape of the billet guide holes 48B and 58B.
  • Other members, structures, etc. This is exactly the same as the extrusion die 14 of the fifth embodiment. Therefore, the same structure and the same members as those of the fifth embodiment are denoted by the same reference numerals, and only different portions will be described.
  • the extrusion die 15 of the sixth embodiment is configured such that a hollow profile 3 having a cross-sectional lattice shape as shown in FIG. 20 can be formed. And in this hollow shape member 3, nine intersections X are provided.
  • the male member 120 of the extrusion die 15 supports a mandrel portion 53 that forms the inner shape of the hollow shape member 2, and supports the mandrel portion 53 and protrudes outward from the periphery of the mandrel portion 53 in a substantially X shape.
  • the spider 52 includes a bridge portion 54, and the spider 52 is integrally connected to the holder portion 125 via the bridge portion 54.
  • each of the bridges 54a to 54d and a part of the inner peripheral surface of the holder 125 are integrally fixed by the bridge portion shrink-fitting structure N, and the bridges 54a to 54d and the mandrel portion 53 are fixed. The strength of is secured.
  • the bridge portion 54 is composed of four pieces, a first bridge 54a, a second bridge 54b, a third bridge 54c, and a fourth bridge 54d, which are arranged clockwise.
  • a space between the bridges 54a to 54d is a billet introduction space S for introducing the billet B.
  • the billet guide hole 58 is formed at the large opening hole 58A formed on the upstream side of the mandrel portion 53 and on the downstream side of the mandrel portion 53, that is, at the intersection X of the partition walls 1b and 1b. It consists of a small opening hole 58B formed so as to correspond.
  • the large opening hole 58A has substantially the same shape as the large opening hole 48A of the extrusion die 14 of the fifth embodiment, that is, a concave shape that has a substantially square shape in plan view and enters a predetermined dimension on the lower side of the mandrel portion 53.
  • the small opening hole 58B is formed in the bottom face part of this large opening hole 58A.
  • the small opening holes 58B are provided at nine locations, and are formed from the bottom surface portion of the large opening hole 58A toward the downstream side of the mandrel portion 53.
  • these small opening holes 58B can respond
  • An inner molding piece 53 ⁇ / b> B is provided below the mandrel 53.
  • the positions of the respective intersections P correspond to the intersections X in nine portions where the respective corners of the flanges 53F of the 16 inner molding pieces 53B are gathered.
  • the positions of the small opening holes 58B are set so that the positions of the nine intersection points P and the centers of the small opening holes 58B of the nine billet guide holes 58 coincide with each other.
  • the large opening hole 58A is formed to have a larger planar shape than the large opening hole 48A of the fifth embodiment.
  • the size of each inner forming piece 53B is substantially the same as the size of each inner forming piece 43B of the extrusion die 14 of the fifth embodiment, the size of the mandrel 53 of the extrusion die 15 is the same. Is larger than the size of the mandrel 43 of the extrusion die 14 of the fifth embodiment. Therefore, the size of the outer forming die hole 130B of the female die 130 that accommodates the 16 inner forming pieces 53B is formed larger than the size of the outer forming die hole 30B of the extrusion die 14 of the fifth embodiment. ing.
  • the 16 inner molding pieces 53B have the same quadrangular shape, and are arranged so as to be square as a whole.
  • the shape forming inner hole 51 is constituted by the gap L2 between the inner forming pieces 53B.
  • the 16 inner molding pieces 53B arranged in a square shape are inserted into the outer molding die holes 130B of the female mold 130.
  • the hollow shape member 3 formed by the extrusion die 16 of the sixth embodiment as described above will be described with reference to FIG.
  • the hollow shape member 3 is formed of a pair of outer peripheral walls 3a and 3a that are formed in a quadrangular cross-section and are arranged to face each other, and three vertical and horizontal partition walls 3b and 3b provided in the interior. It has a cross-sectional lattice shape having 16 spaces 3S. And the crossing part X where the partition walls 3b and 3b cross is provided in nine places.
  • board thickness dimension of the partition walls 3b and 3b of every three length and width is formed in the same dimension.
  • each intersection P corresponds to nine intersections X formed by the partition walls, and each intersection P and the center of the small opening hole 58B of each billet guide hole 58 are on the same line. Therefore, the billet B passing through each small opening hole 58B is pushed out via each intersection P. Therefore, it is possible to easily form the hollow shape member 3 having a cross-sectional lattice shape having nine intersecting portions X.
  • the configuration of the billet guide hole 68 is different from the configuration of the billet guide hole 58 in the extrusion die 15 of the sixth embodiment.
  • other members, structures, etc. are exactly the same as the extrusion die 15 of the sixth embodiment. Therefore, the same structure and the same members as those of the sixth embodiment are denoted by the same reference numerals, and only different portions will be described.
  • the male member 120 of the extrusion die 16 supports a mandrel portion 63 that molds the inner shape of the hollow shape member 3, and supports the mandrel portion 63 and protrudes outward from the periphery of the mandrel portion 63 in a substantially X shape.
  • the spider 62 includes a bridge portion 64, and the spider 62 is integrally connected to the holder portion 125 via the bridge portion 64.
  • each bridge 64a to 64d and the inner peripheral surface of the holder 125 are integrally fixed by the bridge portion shrinkage fitting structure N, and the strength of each bridge 64a to 64d and the mandrel portion 63 is increased. It is secured.
  • the bridge portion 64 is composed of four pieces, a first bridge 64a, a second bridge 64b, a third bridge 64c, and a fourth bridge 64d, which are arranged clockwise.
  • a space between the bridges 64a to 64d is a billet introduction space S.
  • the extrusion die 16 of the seventh embodiment is configured to be able to form a hollow section 4 having a cross-sectional lattice shape as shown in FIG.
  • the hollow shape member 4 has nine intersecting portions X formed by partition walls having different thickness dimensions, and the billet guide hole 68 is configured to correspond to these intersecting portions X. ing.
  • the billet guide hole 68 has nine large openings 68A provided on the upper side of the mandrel portion 63 and nine lower portions on the lower side of the mandrel portion 63 corresponding to the nine intersections X. It consists of a small opening hole 68B.
  • the large opening hole 68A is formed in a shape substantially the same as the large opening hole 58A of the billet guide hole 58 in the extrusion die 15 of the sixth embodiment.
  • the small opening hole 68B is formed from the bottom surface portion of the large opening hole 68A toward the intersecting portion X side, that is, toward the female member 130 side.
  • the small opening hole 68B includes three types having different opening areas. That is, one small opening hole 68B1 having the largest opening area is provided in the central portion among the small opening holes 68B that are equally arranged three by three in the vertical and horizontal directions, with respect to the first small opening hole 68B1. A second small opening hole 68B2 having a large opening area next to the first small opening hole 68B1 is provided on both sides of the cross-shaped line.
  • a third small opening hole 68B3 having a small opening area is also provided. That is, the third small opening hole 68B3 is disposed at the four corners of the bottom surface portion of the large opening hole 68A.
  • these small opening holes 68B can respond
  • An inner molding piece 63 ⁇ / b> B is provided below the mandrel 63.
  • the positions of the intersections P correspond to the intersections X1, X2, and X3 at nine portions where the respective corner portions of the flange portions 63F of the 16 inner molding pieces 63B gather.
  • the small opening holes are arranged so that the positions of the nine intersection points P and the centers of the small opening hole portions 68B1, 68B2, 68B3 of the nine billet guide holes 68 coincide with each other.
  • the positions of the parts 68B1, 68B2, and 68B3 are set.
  • the size of each inner forming piece 63B is substantially the same as the size of each inner forming piece 53B of the extrusion die 15 of the sixth embodiment.
  • the sixteen inner molding pieces 63B each have the same rectangular shape, and all of them are equally arranged in a rectangular shape.
  • the inner molding pieces 63B are arranged so that the intervals are different. That is, the 16 inner molding pieces 63B are arranged with four cross-shaped gaps L3 being interposed between the four inner molding pieces 63B, and the four inner molding pieces 63B are arranged with the cross-shaped gaps L4 being sandwiched therebetween. Has been.
  • the side surfaces of the outermost twelve inner molding pieces 63B face the outer molding dies 130B formed on the female mold member 130 with a gap L1 therebetween.
  • the gap interval of the gap L4 is a width-thickness gap interval larger than the gap interval of the gap L3, and the gap L1 is set to an intermediate gap interval between the gap L4 and the gap L3.
  • the shape forming inner hole 52 is constituted by the gap L3
  • the shape forming inner hole 53 is constituted by the gap L4
  • the shape forming outer hole 50 is constituted by the gap L1.
  • the hollow shape member 4 formed by the extrusion die 16 of the seventh embodiment as described above will be described.
  • the hollow shape member 4 is formed in a cross-sectional lattice shape, and includes outer peripheral walls 4a and 4a having a rectangular cross-sectional shape, first cross-shaped first partition walls 4b1 and 4b1 continuous to the outer peripheral walls 4a and 4a, and the first The partition walls 4b1 and 4b1 are configured by cross-shaped second partition walls 4b2 and 4b2 provided at the center in the length direction.
  • the first partition walls 4b1 and 4b1 are formed thicker than the second partition walls 4b2 and 4b2. Further, the portion where the first partition walls 4b1 and 4b1 intersect is the thickest intersection portion X1, and the portion where the first partition wall 4b1 and the second partition wall 4b2 intersect is the next thickest intersection. Part X2. Further, the portion where the second partition walls 4b2 and 4b2 intersect with each other is the thinnest intersection portion X3.
  • the thickest intersection X1 corresponds to the first small opening hole 68B1
  • the thickest intersection X2 corresponds to the second small opening hole 68B2.
  • the third small opening hole 68B3 corresponds to the thinnest crossing portion X3.
  • the large opening hole 68A to the small opening hole 68B of the billet guide hole 68 are three kinds of first small opening hole 68B1, second small opening hole 68B2 and third small opening hole 68B3 having different hole diameters.
  • the portions where the first partition walls 4b1 and 4b1 that are configured and have different plate thicknesses intersect each other are the intersection X1, the intersection X2 where the first partition wall 4b1 and the second partition wall 4b2 intersect, and the second partition wall. This corresponds to the intersection X3 where 4b2 and 4b2 intersect. Therefore, the cross-sectional lattice-shaped hollow shape member 4 having partition walls having different plate thicknesses can be easily formed.
  • the hollow shapes 1 to 6 formed by the extrusion dies 10 to 16 have a complicated cross section having an intersection X formed by the partition wall 1b and the like. However, it is not limited to this.
  • the extrusion dies 17 to 19 of the eighth to tenth embodiments of the present invention by changing the shape of the inner molding piece, as shown in FIGS. 25 (A), (B) and FIG. Hollow profiles 7, 8, 9 having curved partition walls 7b, 8b, 9b can be formed.
  • the hollow member 7 formed by the extrusion die 17 of the eighth embodiment includes outer peripheral walls 7a and 7a having a quadrangular cross section and the outer peripheral walls 7a and 7a. It is comprised by the curved partition walls 7b and 7b provided in the inside. These partition walls 7b and 7b are formed so as to connect the central portions in the length direction of the outer peripheral walls 7a and 7a orthogonal to each other in a curved shape.
  • the partition wall 7b is composed of one inner molding piece 73B1 and two inner molding pieces 73B2 arranged with the inner molding piece 73B1 interposed therebetween.
  • the inner molding piece 73B1 and the inner molding piece 73B2 are inserted into the outer molding die hole 30B formed in the female member 30.
  • the shape molding outer hole 50 of the gap L1 is formed, and a partition wall
  • the thickness dimension of 7b, 7b is set so that it may become the said clearance gap L2, and the said shape forming inner side hole part 51 is formed by this clearance gap L2.
  • the small opening portions 78B and 78B of the billet guide hole 78 are opposed to the portion where the curved portions of the partition walls 7b and 7b are closest to each other, and the billet guide hole 78 is disposed in the small opening portions 78B and 78B.
  • the large opening hole 28A is connected.
  • the billet guide hole 78 is provided at the center of a mandrel (not shown).
  • the overall configuration of the extrusion die 17 is substantially the same as the overall configuration of the extrusion die 10 and the like of the first embodiment.
  • the billet is fed from the upstream side, a part of which is introduced into the large opening hole portion 78A of the billet guide hole 78, and the inner forming piece 73B1 and the small opening portions 78B and 78B and It is pushed out from the gap between the inner molding pieces 73B2.
  • the billet introduced into the small openings 78B and 78B is pushed out from the shape forming inner hole 51, the curved partition walls 7b and 7b can be easily formed.
  • the hollow member 8 formed by the extrusion die 18 has outer peripheral walls 8a and 8a having a quadrangular cross section, and a curved shape provided inside these outer peripheral walls 8a and 8a.
  • Partition walls 8b and 8b are formed in curved shapes protruding from the outer peripheral walls 8a and 8a facing each other toward the center of the cross section of the hollow shape member 8, respectively.
  • the partition wall 8b is composed of one inner molding piece 83B1 and two inner molding pieces 83B2 arranged so as to sandwich the inner molding piece 83B1.
  • the inner molding piece 83B1 and the inner molding piece 83B2 are inserted into the outer molding die hole 30B formed in the female member 30.
  • the shape molding outer hole 50 of the gap L1 is formed, and a partition wall
  • the thickness dimension of 8b, 8b is set to be the gap L2, and the shape forming inner hole 51 is formed by the gap L2.
  • the small opening portions 88B and 88B of the billet guide hole 88 are arranged to face each other at the portion where the curved portions between the partition walls 8b and 8b are closest, and the billet guide is disposed in the small opening portions 88B and 88B.
  • the large opening hole 88A of the hole 88 is connected.
  • the billet guide hole 88 is provided at the center of a mandrel (not shown).
  • the overall configuration of the extrusion die 18 is substantially the same as the overall configuration of the extrusion die 10 and the like of the first embodiment.
  • the billet is fed from the upstream side, a part of the billet is introduced into the large opening hole portion 88A of the billet guide hole 88, and the inner forming piece 83B1 and the small opening portions 88B and 88B and It is pushed out from the gap between the inner molding pieces 83B2.
  • the billet introduced into the small openings 88B and 88B is pushed out from the shape forming inner hole 51, the curved partition walls 8b and 8b can be easily formed.
  • the hollow member 9 formed by the extrusion die 19 includes outer peripheral walls 9a and 9a having a square cross section and corrugated partitions provided inside these outer peripheral walls 9a and 9a. It consists of walls 9b and 9b. These partition walls 9b and 9b are each formed in a corrugated shape connecting the outer peripheral walls 9a and 9a facing each other.
  • the partition wall 9b is constituted by one inner molding piece 93B1 and two inner molding pieces 93B2 arranged with the inner molding piece 93B1 interposed therebetween.
  • the inner molding piece 93B2 and the inner molding piece 93B2 are inserted into the outer molding die hole 30B formed in the female member 30.
  • the shape molding outer hole 50 of the gap L1 is formed, and a partition wall
  • the thickness dimension of 9b, 9b is set to be the gap L2, and the shape forming inner hole 51 is formed by the gap L2.
  • small openings 98B and 98B of billet guide holes 98 are arranged oppositely to each central portion of the partition walls 9b and 9b in the longitudinal direction, and the billet guides are disposed in the small openings 98B and 98B.
  • the large opening hole 98A of the hole 98 is connected.
  • the billet guide hole 98 is provided at the center of a mandrel (not shown).
  • the overall configuration of the extrusion die 19 is substantially the same as the overall configuration of the extrusion die 10 and the like of the first embodiment.
  • the billet is fed from the upstream side, a part of which is introduced into the large opening hole portion 98A of the billet guide hole 98, and the inner forming piece 93B1 and the small opening portions 98B and 98B and It is pushed out from the gap between the inner molding pieces 93B2.
  • the billet introduced into the small openings 98B and 98B is pushed out from the shape forming inner hole 51, the curved partition walls 9b and 9b can be easily formed.
  • the large opening hole portion 48A of the billet guide hole 48 of the extrusion die 14 is formed in a concave shape recessed in the downstream side in a substantially square shape as shown in FIG.
  • the large opening hole 78A is configured by a tapered hole that narrows from the upper surface of the mandrel portion 43 toward the bottom surface of the large opening hole portion 78A.
  • the large opening holes 58A and 68A of the billet guide holes 58 and 68 of the sixth and seventh embodiments also go from the upper surface of the mandrel parts 53 and 63 to the bottom surfaces of the large opening holes 58A and 68A in the same manner as described above. Therefore, it may be configured as a tapered hole with a narrowing shape.
  • the billet guide hole 28 has a two-stage configuration of the large opening hole 28A and the small opening hole 28B, and the bottom surface of the large opening hole 28A is formed on a flat surface.
  • the bottom surface portion of the large opening hole portion 28A may be a bottom surface portion formed of a corner portion having an inclined surface of 45 degrees, for example. In this way, the billet B flows more smoothly.
  • each of the extrusion dies 10 to 13 can form the hollow section 1 having a cross-sectional shape.
  • each of the extrusion dies 14 is formed.
  • 16 to 16 can form the hollow sections 2 to 4 having a cross-sectional lattice shape, respectively, but is not limited thereto.
  • the outer peripheral walls 5a and 5a have two vertical walls and one horizontal partition wall 5b and 5b in two horizontal directions. You may comprise so that the hollow shape material 5 in which the cross
  • partition walls 6c, 6c are formed at the four corners of the outer peripheral walls 6a, 6a formed in a rectangular tube shape. It is good also as the hollow shape material 6 of the external shape which provided in the shape of a hook.
  • the extrusion die of the present invention is used when a high-strength alloy, in particular, a high-strength aluminum alloy such as a so-called 7000 series is used to form a hollow shape member having a partition wall inside.
  • a high-strength alloy in particular, a high-strength aluminum alloy such as a so-called 7000 series is used to form a hollow shape member having a partition wall inside.

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Abstract

[Problem] To provide an extrusion die for forming a hollow material that makes it possible to extrude a billet comprising a high-strength alloy that has high extrusion force, particularly a high-strength aluminum such as the so-called 7000 series, and to easily form a hollow material having a partition wall provided to the interior thereof. [Solution] An extrusion die (10) is configured so as to comprise: a male-type member (20) that extrudes a billet on a downstream side and forms the inner shape of a material; and a female-type member (30) that forms the outer shape of the material. A billet guide hole (28) that guides one part of the billet toward the downstream side is provided to the central area of a mandrel section (23) that constitutes the male-type member (20). Four inner formation pieces (23) are mounted in a fixed manner to positions that face the downstream-side opening of the billet guide hole (28). The female-type member (30) is provided with an outer formation die hole (30B) that faces all of the outer peripheral surfaces of the inner formation pieces (23) and that forms the outer shape of the hollow material.

Description

中空形材成形用押出ダイスExtrusion dies for hollow profile molding
　本発明は中空形材成形用押出ダイスに係り、さらに詳しくは、高力系合金、特に、いわゆる７０００系といった高強度アルミニウム合金を押出して、内部に仕切り壁が設けられた中空形材を成形する中空形材成形用押出ダイスに関する。 The present invention relates to an extrusion die for forming a hollow shape, and more specifically, a high-strength alloy, in particular, a high-strength aluminum alloy such as a so-called 7000 series is extruded to form a hollow shape with a partition wall provided therein. The present invention relates to an extrusion die for forming a hollow shape.
　一般にアルミニウム合金等の押出加工は、断面形状の自由度が高く、押出成形される中空形材を得るのに優れているため、現在では広く採用されている。
　すなわち、押出加工による製品が、構造材、機械部品等の強度部材として広く使用されるようになってきており、高力系合金、特に、７０７５、７Ｎ０１、７００３等の、いわゆる７０００系といった高強度アルミニウム合金からなる押出部材の需要が増加している。そして、押出成形される中空形材として、最近では、角筒状の他に、断面日の字形状、目の字形状等、複雑な断面形状のものも生産されてきている。 In general, extrusion of aluminum alloy or the like is widely used at present because it has a high degree of freedom in cross-sectional shape and is excellent in obtaining a hollow shape material to be extruded.
That is, products by extrusion are widely used as strength members for structural materials, machine parts, and the like, and high strength alloys such as so-called 7000 series such as 7075, 7N01, 7003, etc. There is an increasing demand for extruded members made of aluminum alloys. In addition, as a hollow material to be extruded, recently, in addition to a rectangular tube shape, those having a complicated cross-sectional shape such as a square shape of a cross-section and a shape of an eye-shape have been produced.
　複雑な断面形状の中空形材を成形するための従来の押出ダイスの一例として、金属製三次元押出材の製造方法及び製造装置が知られている（例えば、特許文献１参照）。
　この金属製三次元押出材の製造方法及び製造装置では、長さ方向に中空部と中実部とが混在した三次元押出材を成形することができるように構成されている。 As an example of a conventional extrusion die for forming a hollow section having a complicated cross-sectional shape, a manufacturing method and a manufacturing apparatus for a metal three-dimensional extrusion material are known (for example, see Patent Document 1).
This metal three-dimensional extruded material manufacturing method and manufacturing apparatus are configured to be able to form a three-dimensional extruded material in which a hollow portion and a solid portion are mixed in the length direction.
　また、仕切り壁を有する中空形材を形成する中空材の押出し用ダイが知られている（例えば、特許文献２参照）。
　この押出し用ダイでは、断面横長の日の字形状や、断面目の字形状の中空材を形成できるように構成されている。 A hollow material extrusion die that forms a hollow material having a partition wall is also known (see, for example, Patent Document 2).
This extrusion die is configured so as to be able to form a hollow material having a horizontally long cross-sectional shape or a cross-sectional shape.
　さらに、長さ方向に横断面形状が異なる金属製押出材の押出加工方法及び装置が知られている（例えば、特許文献３参照）。
　この押出加工方法及び装置によれば、長さ方向に横断面形状が異なるアルミニウム製押出材を押出成形できるように構成されている。 Furthermore, a method and an apparatus for extruding a metal extruded material having a different cross-sectional shape in the length direction are known (for example, see Patent Document 3).
According to this extrusion processing method and apparatus, it is configured to be able to extrude aluminum extruded materials having different cross-sectional shapes in the length direction.
特開平４－３０５３１２号公報JP-A-4-305312 特公平５－９１６９号公報Japanese Patent Publication No. 5-9169 特許登録３０９５９１６号公報Patent registration 3095916
　ところで、中空形材成形用の材料として、高力系合金、特に、いわゆる７０００系の高強度アルミを使用して、例えば、断面目の字形状等といった複雑な中空形材を形成する場合、対向する一対の外周壁と平行な２個の仕切壁が形成され、これらの仕切壁は直線状なので、ビレットの流れは比較的に流れ易いものと考えられる。 By the way, when forming a complex hollow shape such as a cross-sectional shape using a high-strength alloy, in particular, a so-called 7000-type high-strength aluminum as a material for forming a hollow shape, Two partition walls parallel to the pair of outer peripheral walls are formed, and since these partition walls are linear, it is considered that the billet flows relatively easily.
　ところが、最近では断面目の字形状等の中空形材だけに限らず、中空形材の強度をより向上させる等の理由により、さらに複雑な断面形状の中空形材、例えば断面田の字形状の中空形材や断面曲線状の仕切り壁を有する中空形材等も要望されてきている。
　断面田の字形状の中空形材の場合、田の字形状を形成する十文字状の仕切り壁がそれぞれの中央部で交差しているので、上流側から送り込まれて押出されるアルミニウム合金からなるビレットが、交差部から互いに直交する方向には流れにくい。そのため、交差部を有する十文字状の仕切り壁を充分に形成することができないという問題が生じる。
　また、交差部がない場合で、例えば、複雑な曲線状の仕切り壁が設けられている中空形材でも、ビレットの流れが曲線部で滞りやすくなるので、曲線状の仕切り壁を充分に形成することができないという問題が生じる。 However, these are not limited to hollow shapes such as the cross-sectional shape of the shape of the cross section, but for the purpose of further improving the strength of the hollow shape, the hollow shape of a more complicated cross-sectional shape, such as There has been a demand for a hollow shape member or a hollow shape member having a partition wall having a curved cross section.
In the case of a hollow section with a cross-sectional shape, a billet made of an aluminum alloy that is fed from the upstream side and extruded because the cross-shaped partition walls that form the shape of the cross intersect each other at the center. However, it is difficult to flow in the direction orthogonal to each other from the intersection. Therefore, the problem that the cross-shaped partition wall which has an intersection part cannot fully be formed arises.
Further, in the case where there is no intersection, for example, even in a hollow shape member provided with a complicated curved partition wall, the flow of the billet is likely to stagnate in the curved portion, so that the curved partition wall is sufficiently formed. The problem of being unable to do so arises.
　さらに、上記前記特許文献１に開示された金属性三次元押出材の製造方法及び製造装置では、長さ方向に中空部と中実部とが混在した三次元押出材を成形することができるように構成されているが、特許文献１に開示された装置では、仕切り壁で構成された交差部のある中空形材を成形することはできない。 Furthermore, in the method and apparatus for manufacturing a metallic three-dimensional extruded material disclosed in Patent Document 1, a three-dimensional extruded material in which a hollow portion and a solid portion are mixed in the length direction can be formed. However, in the apparatus disclosed in Patent Document 1, it is not possible to mold a hollow shape member having an intersecting portion constituted by a partition wall.
　また、前記特許文献２に開示された仕切壁を有する中空型材の押出ダイでは、断面横長の日の字形状や、断面目の字形状の中空材を形成することはできるが、前述のように、仕切り壁で交差部が形成されているので、押出されたべレットが一方向には流れるが、交差部から一方向と直交する方向には流れにくくなり、断面田の字形状の中空型材を成形することは困難である。 In addition, in the hollow die extrusion die having a partition wall disclosed in Patent Document 2, it is possible to form a hollow material having a cross-sectionally long sun shape or a cross-sectional character shape, as described above. Since the intersecting part is formed by the partition wall, the extruded beret flows in one direction, but it hardly flows in the direction perpendicular to the one direction from the intersecting part, forming a hollow-shaped material having a cross-sectional shape. It is difficult to do.
　また、前記特許文献３に開示された長さ方向に横断面形状が異なる金属性押出材の押出加工方法及び装置では、長さ方向に横断面形状が異なるアルミニウム製押出材を押出成形できるが、特許文献３に開示された装置では、仕切り壁で構成された交差部のある中空形材を成形することはできない。 Moreover, in the extrusion method and apparatus of the metallic extruded material having a different cross-sectional shape in the length direction disclosed in Patent Document 3, an aluminum extruded material having a different cross-sectional shape in the length direction can be extruded. In the apparatus disclosed in Patent Document 3, it is not possible to mold a hollow shape member having an intersection formed by partition walls.
　上記問題点を解決するために、本発明では、押出加工力が大きな高力系合金、特に、いわゆる７０００系といった高強度アルミニウム合金からなるビレットを押出して、内部に仕切り壁が設けられた中空形材を容易に成形することができる中空形材成形用押出ダイスを提供することを目的とする。 In order to solve the above-mentioned problems, in the present invention, a high-strength alloy having a large extrusion processing force, in particular, a hollow type in which a billet made of a high-strength aluminum alloy such as a so-called 7000 series is extruded and a partition wall is provided inside. It is an object of the present invention to provide an extrusion die for forming a hollow material capable of easily forming a material.
　上記目的を達成するため、本発明の中空形材成形用押出ダイスは、上流側から送込まれるアルミニウム合金からなるビレットを下流側に向けて案内しつつ中空形材の内側形状を成形するオス型部材と、このオス型部材を外周部で保持すると共に前記中空形材の外側形状を成形するメス型部材とを備えた中空形材成形用押出ダイスであって、
　前記オス型部材を、前記内側形状を成形するマンドレル部と、このマンドレル部の外周部に複数のブリッジ部を介して一体的に連結されたホルダー部とにより構成し、
　前記マンドレル部の中央領域に前記ビレットの一部を下流側に向けて案内するビレットガイド穴を設け、このビレットガイド穴の上流側開口面積を下流側開口部の開口面積よりも大きく形成し、
　前記ビレットガイド穴の下流側で、且つ前記各ブリッジ部側から流入するビレットとの合流空間をなすビレット流入隙間空間を下流側に向けて維持しつつ前記中空形材の内部で連続仕切壁を形成する位置に、複数の内側成形用駒を固定装備したことを特徴とする。 In order to achieve the above object, the hollow die forming extrusion die of the present invention is a male die for forming the inner shape of a hollow shape member while guiding a billet made of an aluminum alloy fed from the upstream side toward the downstream side. An extrusion die for forming a hollow member comprising a member and a female member that holds the male member at the outer peripheral portion and forms the outer shape of the hollow member,
The male member is composed of a mandrel part for forming the inner shape, and a holder part integrally connected to the outer peripheral part of the mandrel part via a plurality of bridge parts,
A billet guide hole for guiding a part of the billet toward the downstream side is provided in a central region of the mandrel part, and an upstream opening area of the billet guide hole is formed larger than an opening area of the downstream opening part,
A continuous partition wall is formed inside the hollow shape member while maintaining a billet inflow gap space that forms a merge space with the billet flowing in from each bridge portion side on the downstream side of the billet guide hole toward the downstream side. A plurality of inner molding pieces are fixedly installed at the position to be operated.
　本発明の中空形材成形用押出ダイスは、以上のように構成されているので、マンドレル部の中央領域に設けられたビレットガイド穴からビレットの一部がブリッジ部側から流入するビレットと合流して、下流側に向けて維持されたビレット流入隙間空間から押出される。ビレットガイド穴から押出されるビレットは、複数の内側成形用駒により形成される中空形材の仕切り壁部の位置に向かって押し出されるので、複雑形状の断面形状、例えば、仕切り壁の交差部や、曲線状の仕切り壁の曲線部にまで充分に行き届く。その結果、押出加工力が大きな高力系合金、特に、いわゆる７０００系といった高強度アルミニウム合金からなるビレットを押出して、仕切り壁が設けられた中空形材を容易に成形することができる。 Since the extrusion die for forming a hollow shape material of the present invention is configured as described above, a part of the billet joins with the billet flowing from the bridge portion side through the billet guide hole provided in the central region of the mandrel portion. Then, it is pushed out from the billet inflow gap space maintained toward the downstream side. Since the billet extruded from the billet guide hole is pushed toward the position of the partition wall portion of the hollow shape member formed by the plurality of inner molding pieces, the cross section of the complex shape, for example, the intersection of the partition wall or It reaches the curved part of the curved partition wall enough. As a result, a high-strength alloy having a large extruding force, in particular, a billet made of a high-strength aluminum alloy such as a so-called 7000 series can be extruded to easily form a hollow member provided with a partition wall.
本願発明に係る中空形材成形用押出ダイスの第１実施形態の要部を示す縦断面斜視図である。It is a longitudinal cross-sectional perspective view which shows the principal part of 1st Embodiment of the extrusion die for hollow shape material shaping | molding which concerns on this invention. 前記第１実施形態の中空形材成形用押出ダイスの全体を示す平面図である。It is a top view which shows the whole extrusion die for hollow shape material shaping | molding of the said 1st Embodiment. 図２におけるIII－III線に沿った縦断面図であり、ホルダーとブリッジ外周面とがブリッジ部圧入構造により一体形成され、かつビレットガイド穴が二段構成となった状態を示す縦断面図である。FIG. 3 is a longitudinal sectional view taken along line III-III in FIG. 2, showing a state in which the holder and the bridge outer peripheral surface are integrally formed by a bridge press-fit structure, and the billet guide hole has a two-stage configuration. is there. 図３におけるIV－IV線に沿った一部断面の矢視図である。FIG. 4 is a partial cross-sectional view taken along line IV-IV in FIG. 3. 前記第１実施形態のオス型部材とメス型部材との断面斜視図であり、図１の全体図である。FIG. 2 is a cross-sectional perspective view of the male member and the female member of the first embodiment, and is an overall view of FIG. 1. 前記第１実施形態のメス型部材の表面を示す全体平面図である。It is a whole top view which shows the surface of the female type | mold member of the said 1st Embodiment. 第１実施形態の中空形材成形用押出ダイスにより成形された断面田の字形状の中空形材を示す斜視図である。It is a perspective view which shows the cross-sectional square-shaped hollow shape shape | molded with the extrusion die for hollow shape material shaping | molding of 1st Embodiment. 本発明に係る中空形材成形用押出ダイスの第２実施形態であり、ホルダーとブリッジ外周面とがブリッジ部圧入構造により一体形成され、かつビレットガイド穴がテーパー形状となった状態を示し図３に対応する縦断面図である。FIG. 3 shows a second embodiment of an extrusion die for forming a hollow material according to the present invention, in which a holder and an outer peripheral surface of a bridge are integrally formed by a bridge portion press-fitting structure, and a billet guide hole has a tapered shape. It is a longitudinal cross-sectional view corresponding to. 図８におけるオス型部材とメス型部材との断面斜視図である。FIG. 9 is a cross-sectional perspective view of the male member and the female member in FIG. 8. 本発明に係る中空形材成形用押出ダイスの第３実施形態を示す全体平面図である。It is a whole top view which shows 3rd Embodiment of the extrusion die for hollow shape molding which concerns on this invention. 図１０におけるXI－XI線に沿った縦断面斜視図であり、ホルダーとブリッジ外周面とがブリッジ部焼き嵌め構造により一体形成され、かつビレットガイド穴が二段構成となった状態を示す縦断面図である。FIG. 11 is a vertical cross-sectional perspective view taken along line XI-XI in FIG. 10, showing a state in which the holder and the outer peripheral surface of the bridge are integrally formed by a bridge portion shrink-fitting structure and the billet guide hole has a two-stage configuration. FIG. 本発明に係る中空形材成形用押出ダイスの第４実施形態を表し、ホルダーとブリッジ外周面とがブリッジ部焼き嵌め構造により一体形成されかつビレットガイド穴がテーパー形状となった状態を示す縦断面斜視図である。The longitudinal cross-section showing 4th Embodiment of the extrusion die for hollow shape material shaping | molding which concerns on this invention, and the state where the holder and the bridge | bridging outer peripheral surface were integrally formed by the bridge | bridging part shrink fitting structure, and the billet guide hole became a taper shape It is a perspective view. 本発明に係る中空形材成形用押出ダイスの第５実施形態を表し、ホルダーとブリッジ外周面とがブリッジ部焼き嵌め構造により一体形成された状態を示す全体平面図である。FIG. 10 is a general plan view showing a fifth embodiment of an extrusion die for forming a hollow material according to the present invention, in which a holder and a bridge outer peripheral surface are integrally formed by a bridge portion shrink fitting structure. 図１３のXIV－XIV線に沿った縦断面斜視図である。It is a longitudinal cross-sectional perspective view along the XIV-XIV line | wire of FIG. 図１４におけるXV－XV線に沿った一部断面の矢視図である。FIG. 15 is a partial cross-sectional view taken along line XV-XV in FIG. 14. 第５実施形態の中空形材成形用押出ダイスにより成形された断面格子形状の中空形材を示す斜視図である。It is a perspective view which shows the hollow shape material of a cross-sectional lattice shape shape | molded by the extrusion die for hollow shape material shaping | molding of 5th Embodiment. 本発明に係る中空形材成形用押出ダイスの第６実施形態を示す全体平面図である。It is a whole top view which shows 6th Embodiment of the extrusion die for hollow shape molding which concerns on this invention. 図１７のXVIII－XVIII線に沿った縦断面斜視図である。FIG. 18 is a longitudinal sectional perspective view taken along line XVIII-XVIII in FIG. 17. 図１８におけるXIX－XIX線に沿った一部断面の矢視図である。FIG. 19 is a partial cross-sectional view taken along line XIX-XIX in FIG. 18. 第６実施形態の中空形材成形用押出ダイスにより成形された断面格子形状の中空形材を示す斜視図である。It is a perspective view which shows the hollow shape material of a cross-sectional lattice shape shape | molded by the extrusion die for hollow shape material shaping | molding of 6th Embodiment. 本発明に係る中空形材成形用押出ダイスの第７実施形態であり、ホルダーとブリッジ外周面とがブリッジ部焼き嵌め構造により一体形成された状態を示す全体平面図である。It is 7th Embodiment of the extrusion die for hollow shape molding which concerns on this invention, and is a whole top view which shows the state by which the holder and the bridge | bridging outer peripheral surface were integrally formed by the bridge | bridging part shrink fitting structure. 図２１のXXII－XXII線に沿った縦断面斜視図である。FIG. 22 is a longitudinal sectional perspective view taken along line XXII-XXII in FIG. 21. 図２２におけるXXIII－XXIII線に沿った一部断面の矢視図である。FIG. 23 is a partial cross-sectional view taken along line XXIII-XXIII in FIG. 第７実施形態の中空形材成形用押出ダイスにより成形された仕切り壁の厚さが異なる断面格子形状の中空形材を示す斜視図である。It is a perspective view which shows the hollow shape material of a cross-sectional lattice shape from which the thickness of the partition wall shape | molded by the extrusion die for hollow shape material shaping | molding of 7th Embodiment differs. 本発明に係る中空形材成形用押出ダイスの第８，９実施形態を利用して成形される曲線状の仕切り壁を有する中空形材を示す模式図であり、図２５（Ａ）は第８実施形態の押出ダイスにより成形される曲線状の仕切り壁を有する中空形材を示す図、図２５（Ｂ）は第８実施形態の押出ダイスにより成形される曲線状の仕切り壁を有する中空形材を示す図である。FIG. 25A is a schematic view showing a hollow shape member having a curved partition wall formed by using the eighth and ninth embodiments of the hollow shape forming extrusion die according to the present invention. The figure which shows the hollow shape member which has the curved partition wall shape | molded by the extrusion die of embodiment, FIG.25 (B) is the hollow shape material which has the curved partition wall shape | molded by the extrusion die of 8th Embodiment. FIG. 本発明に係る中空形材成形用押出ダイスの第１０実施形態を利用して成形される曲線状の仕切り壁を有する中空形材を示す模式図であり、２本の波型曲線状の仕切り壁が設けられた図である。It is a schematic diagram which shows the hollow shape member which has a curved partition wall shape | molded using 10th Embodiment of the extrusion die for hollow shape material shaping | molding which concerns on this invention, and is two wavy curve shape partition walls FIG. 本発明に係る第５実施形態（図１４）の変形形態を示す縦断面斜視図である。It is a longitudinal cross-sectional perspective view which shows the modification of 5th Embodiment (FIG. 14) which concerns on this invention. （Ａ），（Ｂ）とも本願発明の中空形材成形用押出ダイスを利用して成形される交差部を有する仕切り壁を備えた中空形材の変形形態を示す斜視図である。(A), (B) is a perspective view which shows the deformation | transformation form of the hollow shape member provided with the partition wall which has a cross | intersection part shape | molded using the extrusion die for hollow shape material shaping | molding of this invention.
　以下に、図１～図６を参照して、本発明の中空形材成形用押出ダイス（以下、単に押出ダイスという）の第１実施形態を説明する。 Hereinafter, a first embodiment of an extrusion die for forming a hollow material (hereinafter simply referred to as an extrusion die) according to the present invention will be described with reference to FIGS.
　本第１実施形態の押出ダイス１０は、高力系合金、特に、いわゆる７０００系と言われる高強度アルミニウム合金からなる中空形材を成形するものである。
　そして、この押出ダイス１０では、曲線状の仕切り壁や交差部を形成する仕切り壁等、複雑な断面形状を有する中空形材のうち、図７に示すような、内部に交差部Ｘを有する十文字状に設けられた仕切壁１ｂ，１ｂを設けた断面田の字形状の中空形材１を成形するものである。 The extrusion die 10 of the first embodiment is for molding a hollow material made of a high-strength alloy, particularly a high-strength aluminum alloy so-called 7000 series.
And in this extrusion die 10, the cross shape which has the cross | intersection part X inside as shown in FIG. 7 among the hollow shapes which have complicated cross-sectional shapes, such as a partition wall which forms a curved partition wall and a cross | intersection part. The hollow section 1 having a square cross-sectional shape provided with partition walls 1b, 1b provided in a shape is formed.
　図１，３に示すように、押出ダイス１０は、上流側から押出されるアルミニウム合金からなるビレットＢを下流側に向けて案内しつつ中空形材１の内側形状を成形するマンドレル部２３を有するオス型部材２０と、このオス型部材２０を外周部で保持すると共に、中空形材１の外側形状を成形するメス型部材３０とを備えて構成されている。 As shown in FIGS. 1 and 3, the extrusion die 10 has a mandrel portion 23 for forming the inner shape of the hollow shape member 1 while guiding the billet B made of an aluminum alloy extruded from the upstream side toward the downstream side. The male member 20 and a female member 30 that holds the male member 20 at the outer periphery and molds the outer shape of the hollow member 1 are provided.
　オス型部材２０は、前記マンドレル部２３と、このマンドレル部２３の外周部に複数のブリッジ部２４を介して一体的に連結されたホルダー部２５とを備えて構成されている。
　ホルダー部２５は、所定厚さを有する全体円板状に形成され、その押出し方向の上流側の端面には、上記各ブリッジ部２４により分断されているが、全体として、円形状のビレット導入用開口部２５Ｂが形成されている。 The male member 20 includes the mandrel portion 23 and a holder portion 25 integrally connected to the outer peripheral portion of the mandrel portion 23 via a plurality of bridge portions 24.
The holder portion 25 is formed in an overall disk shape having a predetermined thickness, and the upstream end surface in the extrusion direction is divided by the bridge portions 24. However, as a whole, the holder portion 25 is used for introducing a circular billet. An opening 25B is formed.
　マンドレル部２３の中央領域には、後に詳細を示すように、ビレットＢの一部を下流側に向けて案内するビレットガイド穴２８が設けられている。
　そして、このビレットガイド穴２８の上流側開口面積２８Ａが、下流側開口部２８Ｂの開口面積よりも大きく形成されている。 A billet guide hole 28 for guiding a part of the billet B toward the downstream side is provided in the central region of the mandrel portion 23 as will be described in detail later.
The upstream opening area 28A of the billet guide hole 28 is formed larger than the opening area of the downstream opening 28B.
　また、ビレットガイド穴２８の下流側開口部に対向する側で、且つ各ブリッジ部２４側から流入するビレットＢとの合流空間をなすビレット挿通穴ＢＨ１（ビレット流入隙間空間）を下流側、つまりメス型部材３０側に向けて維持しつつ中空形材１の内部に交差部Ｘを有する仕切壁を形成する位置に、複数（本実施形態では４個）の内側成形用駒２３Ｂが固定装備されている。この内側成形用駒２３Ｂは、マンドレル部２３に連結部２３Ｍを介して設けられている。
　そして、４個の内側成形用駒２３全体の外周囲面に対向して、メス型部材３０には、複数中空形材１の外側形状を形成する外側成形ダイス穴部３０Ｂが設けられている。 Further, the billet insertion hole BH1 (billet inflow gap space) that forms a merge space with the billet B flowing in from each bridge portion 24 side on the side facing the downstream opening of the billet guide hole 28 is located downstream, that is, a female. A plurality (four in this embodiment) of inner molding pieces 23B are fixedly mounted at positions where the partition wall having the crossing portion X is formed inside the hollow shape member 1 while maintaining the mold member 30 side. Yes. The inner molding piece 23B is provided on the mandrel part 23 via a connecting part 23M.
Then, facing the outer peripheral surface of the entire four inner molding pieces 23, the female mold member 30 is provided with an outer molding die hole 30 </ b> B that forms the outer shape of the plurality of hollow profiles 1.
　以下、各構成をさらに詳細に説明する。
　まず、図２，３に基づいて押出ダイス１０の全体を説明する。
　図２に示すように、押出ダイス１０は全体円柱状に形成されている。また、押出ダイス１０は、図３に示すように、前記オス型部材２０およびメス型部材３０と、このメス型部材３０を保持するバックダイ７０とを備えて構成されている。
　そして、ビレットＢは、オス型部材２０の上流側に配置されたチャンバー等からなるビレット押出装置８０内に収容され、且つそのビレット押出装置８０により押出されるようになっている。 Hereinafter, each configuration will be described in more detail.
First, the entire extrusion die 10 will be described with reference to FIGS.
As shown in FIG. 2, the extrusion die 10 is formed in a cylindrical shape as a whole. As shown in FIG. 3, the extrusion die 10 includes the male member 20 and the female member 30 and a back die 70 that holds the female member 30.
And the billet B is accommodated in the billet extrusion apparatus 80 which consists of a chamber etc. which are arrange | positioned in the upstream of the male type | mold member 20, and is extruded by the billet extrusion apparatus 80. FIG.
　オス型部材２０とメス型部材３０とバックダイ７０とは一体的に連結されている。
　すなわち、オス型部材２０とメス型部材３０とが、図２、図３に示すように、例えば２本の位置決めピン７１で位置決めされた後、これらのオス型部材２０とメス型部材３０とバックダイ７０とが例えば２本の連結ボルト７２で連結、固定されている。 The male member 20, the female member 30, and the back die 70 are integrally connected.
That is, after the male member 20 and the female member 30 are positioned by, for example, two positioning pins 71 as shown in FIGS. 2 and 3, the male member 20, the female member 30, and the back The die 70 is connected and fixed by, for example, two connecting bolts 72.
　オス型部材２０は、図３，５に詳細を示すように、スパイダー２２を備えて構成され、このスパイダー２２は、中空形材１の内側形状を成形するマンドレル部２３と、このマンドレル部２３を支持すると共に当該マンドレル部２３の周囲から外方に略Ｘ字状に突出したブリッジ部２４と、このブリッジ部２４を介して一体的に連結されたホルダー部２５とを備えて構成されている。 As shown in detail in FIGS. 3 and 5, the male member 20 includes a spider 22, and the spider 22 includes a mandrel portion 23 that forms the inner shape of the hollow shape member 1, and the mandrel portion 23. A bridge portion 24 that supports and protrudes outward from the periphery of the mandrel portion 23 in a substantially X shape, and a holder portion 25 that is integrally connected via the bridge portion 24 are configured.
　上記ブリッジ部２４は、図２に示すように、時計回りに配置された第１ブリッジ２４ａ、第２ブリッジ２４ｂ、第３ブリッジ２４ｃ、および第４ブリッジ２４ｄの４個で構成されている。そして、各ブリッジ２４ａ～２４ｄ間の空間が、ビレット導入空間Ｓとなっている。 As shown in FIG. 2, the bridge section 24 is composed of four parts, a first bridge 24a, a second bridge 24b, a third bridge 24c, and a fourth bridge 24d, arranged in a clockwise direction. A space between the bridges 24a to 24d is a billet introduction space S.
　マンドレル部２３の上面部２３Ａは、円形状の平坦面に形成されており、この上面部２３Ａに上記各ブリッジ２４ａ～２４ｄの上面部が連続している。これらの各ブリッジ２４ａ～２４ｄの上面部は、マンドレル部２３の上面部２３Ａからホルダー部２５の内周面に行くにしたがって低くなる傾斜状に形成されている。
　また、マンドレル部２３の上面部２３Ａは、スパイダー２２とホルダー部２５とが一体的に組立てられたとき、ホルダー部２５の上端面２５Ａ（図３，５参照）と同一高さ面となっている。 The upper surface portion 23A of the mandrel portion 23 is formed in a circular flat surface, and the upper surface portions of the bridges 24a to 24d are continuous with the upper surface portion 23A. The upper surface portion of each of the bridges 24 a to 24 d is formed in an inclined shape that becomes lower from the upper surface portion 23 A of the mandrel portion 23 toward the inner peripheral surface of the holder portion 25.
Further, the upper surface portion 23A of the mandrel portion 23 is flush with the upper end surface 25A (see FIGS. 3 and 5) of the holder portion 25 when the spider 22 and the holder portion 25 are assembled together. .
　図１，３，５に示すように、各ブリッジ２４ａ～２４ｄの先端外周面２４Ａは、ホルダー部２５におけるブリッジ保持部２６のブリッジ受座面２６Ｂと係合し合うようになっている。
　すなわち、ホルダー部２５には、当該ホルダー部２５の上端部に形成されると共に、各ブリッジ２４ａ～２４ｄの先端上面部２４Ｂ（図３参照）を押えるブリッジ押え部２６Ａと、このブリッジ押え部２６Ａに連続し、かつブリッジ２４ａ等の幅寸法と略等しく（好ましくは、やや幅広く）形成された上記ブリッジ受け座面２６Ｂとが、各ブリッジ２４ａ～２４ｄにそれぞれ対応して設けられている。 As shown in FIGS. 1, 3, and 5, the outer peripheral surface 24 </ b> A of each bridge 24 a to 24 d is engaged with the bridge seating surface 26 </ b> B of the bridge holding portion 26 in the holder portion 25.
That is, the holder portion 25 is formed at the upper end portion of the holder portion 25, and has a bridge presser portion 26A for pressing the top end surface portion 24B (see FIG. 3) of each bridge 24a to 24d, and the bridge presser portion 26A. The bridge receiving seat surface 26B that is continuous and formed substantially equal to the width of the bridge 24a or the like (preferably slightly wider) is provided corresponding to each of the bridges 24a to 24d.
　また、ブリッジ押え部２６Ａには、各ブリッジ２４ａ～２４ｄが回転しないように、例えば扁平角柱状の固定部材２７が打込まれるようになっている。
　固定部材２７は、図５に示すように、各ブリッジ２４ａ～２４ｄとブリッジ押え部２６Ａとの位置決めを正確に行った後、ブリッジ押え部２６Ａと各ブリッジ２４ａ～２４ｄの上部側にわたってあけられた固定部材２７用の打込穴に、上方から打込むようになっている。 Further, for example, a flat prismatic fixing member 27 is driven into the bridge holding portion 26A so that the bridges 24a to 24d do not rotate.
As shown in FIG. 5, the fixing member 27 is positioned between the bridge holding portions 26A and the upper portions of the bridges 24a to 24d after accurately positioning the bridges 24a to 24d and the bridge holding portions 26A. The member 27 is driven into the driving hole from above.
　そして、各ブリッジ２４ａ～２４ｄの先端外周面２４Ａとホルダー部２５のブリッジ受座面２６Ｂとの互いの係合面が、押出し方向の上流側から下流側に向かってダイスの中心に近づくような傾斜面に形成されている。そのため、次に述べる内側成形用駒２３Ｂにおける押出しの作用点に生じるモーメントを小さくすることができ、これにより、各ブリッジ２４ａ～２４ｄの強度を大きくすることができる。その結果、各ブリッジ２４ａ～２４ｄの破断を防止することができる。
　なお、各ブリッジ２４ａ～２４ｄの先端外周面２４Ａとホルダー部２５のブリッジ受座面２６Ｂとは、ブリッジ部圧入構造Ｍを構成する圧入により一体化されている。 In addition, the engaging surfaces of the outer peripheral surfaces 24A of the bridges 24a to 24d and the bridge seating surface 26B of the holder portion 25 are inclined so as to approach the center of the die from the upstream side to the downstream side in the pushing direction. Formed on the surface. Therefore, the moment generated at the action point of extrusion in the inner molding piece 23B described below can be reduced, and thereby the strength of each of the bridges 24a to 24d can be increased. As a result, breakage of each of the bridges 24a to 24d can be prevented.
The outer peripheral surfaces 24A of the bridges 24a to 24d and the bridge seating surface 26B of the holder portion 25 are integrated by press-fitting that constitutes the bridge portion press-fitting structure M.
　各ブリッジ２４ａ～２４ｄの下端部は、図１に詳細を示すように、メス型部材３０のホルダー部受面３０Ａから所定寸法だけ上方に離れた位置に位置しており、そこからマンドレル部２３の連結部２３Ｍを介して、中空形材１（図７参照）の内側形状を形成する複数個（実施形態では４個）の内側成形用駒２３Ｂに繋がるような形状に形成されている。 As shown in detail in FIG. 1, the lower ends of the bridges 24a to 24d are located at a position away from the holder receiving surface 30A of the female member 30 by a predetermined dimension, from which the mandrel 23 It is formed in a shape that is connected to a plurality (four in the embodiment) of inner molding pieces 23B that form the inner shape of the hollow shape member 1 (see FIG. 7) via the connecting portion 23M.
　そして、この各ブリッジ２４ａ～２４ｄのそれぞれの下端部には、ホルダー部２５のブリッジ受座面２６Ｂの下端部の各ブリッジ２４ａ～２４ｄの下端部と、メス型部材３０のホルダー部受面３０Ａとで、トンネル状のビレット挿通孔ＢＨが形成されている。このビレット挿通孔ＢＨは、矢印で示すように、各ビレットＢを導入するビレット導入空間Ｓから導入されたビレットＢが合流し合うビレット合流空間を構成している。
　そのため、ビレットＢは、前記各ビレットＢを導入するビレット導入空間Ｓから導入されると共に、ビレット挿通孔ＢＨで合流され、かつ下流側に押し出されるようになっている。 The lower ends of the bridges 24a to 24d are respectively connected to the lower ends of the bridges 24a to 24d at the lower end of the bridge receiving surface 26B of the holder 25 and the holder receiving surfaces 30A of the female member 30. Thus, a tunnel-shaped billet insertion hole BH is formed. This billet insertion hole BH constitutes a billet merging space where billets B introduced from the billet introduction space S for introducing each billet B join together, as indicated by arrows.
Therefore, the billet B is introduced from the billet introduction space S for introducing each billet B, merged at the billet insertion hole BH, and pushed out downstream.
　前記マンドレル部２３の前記ビレットＢの流れの下流側端部には、図１，３，５に示すように、前記４個の内側成形用駒２３Ｂが設けられている。
　これらの内側成形用駒２３Ｂはそれぞれ略四角形状に形成されると共に、前述のように連結部２３Ｍを介してマンドレル部２３の下端部に設けられている（図４も参照）。そして、４個の内側成形用駒２３Ｂはメス型部材３０側に突出し、かつ、図４，６に詳細を示すように、メス型部材３０に形成されている前記外側成形用ダイス穴部３０Ｂ内に挿入されるようになっている。 As shown in FIGS. 1, 3, and 5, the four inner molding pieces 23 </ b> B are provided at the downstream end of the billet B flow of the mandrel portion 23.
Each of these inner molding pieces 23B is formed in a substantially rectangular shape, and is provided at the lower end portion of the mandrel portion 23 via the connecting portion 23M as described above (see also FIG. 4). The four inner molding pieces 23B protrude to the female mold member 30 side, and as shown in detail in FIGS. 4 and 6, the inner molding pieces 23B are formed in the outer molding die hole 30B. To be inserted.
　メス型部材３０は、４個の内側成形用駒２３Ｂ全体の外周囲面に対向すると共に、所定寸法の隙間Ｌ１を確保した大きさに形成されている。
　そして、各内側成形用駒２３Ｂは、上記メス型部材３０の外側成形用ダイス穴部３０Ｂ内に挿入されるようになっており、各内側成形用駒２３Ｂの外周と外側成形用ダイス穴部３０Ｂとの間に設定された上記所定寸法の隙間Ｌ１が、形材外側成形用穴部５０となっている（図１，３，５参照）。
　また、外側成形用ダイス穴部３０Ｂは、図３に示すように、わずかな寸法の直線部と当該直線部からメス型部材３０の外周方向に拡開する逃げ穴部３０Ｃとで形成されている。 The female member 30 is formed in a size that is opposed to the outer peripheral surface of the entire four inner molding pieces 23B and that has a predetermined gap L1.
Each inner molding piece 23B is inserted into the outer molding die hole 30B of the female mold member 30, and the outer periphery of each inner molding piece 23B and the outer molding die hole 30B. The gap L1 having the predetermined dimension set between the two is a shape member outer forming hole 50 (see FIGS. 1, 3 and 5).
Further, as shown in FIG. 3, the outer forming die hole portion 30 </ b> B is formed by a linear portion having a slight size and a relief hole portion 30 </ b> C that expands from the straight portion toward the outer peripheral direction of the female member 30. .
　このような各内側成形用駒２３Ｂは、図７に示すような、断面田の字形状の中空形材１の４つの内部空間１Ｓをそれぞれ形成するようになっており、４個の内側成形用駒２３Ｂは、図４に示すように、全体が略四角形状となるように配置されている。 Each of such inner molding pieces 23B forms four internal spaces 1S of the hollow section 1 having a cross-sectional shape as shown in FIG. 7, and four inner molding pieces are formed. As shown in FIG. 4, the pieces 23 </ b> B are arranged so as to be substantially rectangular.
　各内側成形用駒２３Ｂは、前述のように、前記連結部２３Ｍを介して形材内側成形部２３の押出し方向下流側の端部に設けられている。
　各内側成形用駒２３Ｂにおいて押出し方向上流側には、図１に示すように、それぞれの外周から外側に突出した帯状のフランジ部２３Ｆが各内側成形用駒２３Ｂの外周を巻くようにして設けられている。 As described above, each inner forming piece 23B is provided at the end of the shape inner forming portion 23 on the downstream side in the extrusion direction via the connecting portion 23M.
As shown in FIG. 1, a strip-shaped flange portion 23F projecting outward from the outer periphery of each inner forming piece 23B is provided so as to wind around the outer periphery of each inner forming piece 23B. ing.
　図１，４に示すように、互いに隣り合う内側成形用駒２３Ｂのそれぞれ対向するフランジ部２３Ｆ間には所定寸法の隙間Ｌ２が形成されている。そして、これらの隙間Ｌ２により、前記中空形材１の十文字形状の前記仕切壁１ｂ，１ｂを形成するための前記形材形成用内側穴部５１が構成されている。 As shown in FIGS. 1 and 4, a gap L2 having a predetermined dimension is formed between the opposing flange portions 23F of the inner molding pieces 23B adjacent to each other. The gap L2 forms the shape forming inner hole 51 for forming the cross-shaped partition walls 1b, 1b of the hollow shape 1.
　また、各内側成形用駒２３Ｂのそれぞれのフランジ部２３Ｆの外周は、前記メス型部材３０に形成されている前記外側成形用ダイス穴部３０Ｂと対向配置されている。そして、両者の間には、前記所定寸法の隙間Ｌ１が形成されており、これらの隙間Ｌ１により、前記中空形材１の外周壁２ａ，２ａを形成するための形材形成用外側穴部５０が構成されている。 Further, the outer periphery of each flange portion 23F of each inner molding piece 23B is disposed opposite to the outer molding die hole portion 30B formed in the female mold member 30. A gap L1 having the predetermined dimension is formed between the two, and the shape forming outer hole 50 for forming the outer peripheral walls 2a, 2a of the hollow shape 1 by the gap L1. Is configured.
　各内側成形用駒２３Ｂのそれぞれのフランジ部２３Ｆの上面は、図１，３等に示すように、メス型部材３０のホルダー部受面３０Ａと同一平面となっている。そのため、ビレットＢは、前記ビレット挿通穴ＢＨから前記マンドレル部２３の連結部２３Ｍの側面を経由して、それぞれのフランジ部２３Ｆの上端面に沿っても押し出されるようになっている。 The upper surface of each flange portion 23F of each inner molding piece 23B is flush with the holder portion receiving surface 30A of the female member 30 as shown in FIGS. Therefore, the billet B is pushed out from the billet insertion hole BH via the side surface of the connecting portion 23M of the mandrel portion 23 and also along the upper end surface of each flange portion 23F.
　前述のように、中空形材１は、２枚の仕切壁１ｂ，１ｂにより１つの交差部Ｘが形成されている。そのため、前記ビレットＢを導入するビレット導入空間Ｓ、ビレット挿通孔ＢＨおよびビレット挿通孔ＢＨ１から押出されるビレットＢだけでは交差部Ｘまで行きわたらないおそれがある。 As described above, in the hollow shape member 1, one intersection X is formed by the two partition walls 1b and 1b. Therefore, the billet introduction space S for introducing the billet B, the billet insertion hole BH, and the billet B extruded from the billet insertion hole BH1 alone may not reach the intersection X.
　そこで、本第１実施形態のダイス１０では、図１～４に示すように、前記マンドレル部２３の中央領域に、ビレットＢの一部を下流側に向けて案内する前記ビレットガイド穴２８を設けた構成となっている。
　このビレットガイド穴２８は、上記仕切壁１ｂ，１ｂの交差部Ｘに対応して設けられている。そして、マンドレル部２３のビレットＢの流入側に位置する上流側開口面積が、ビレットＢの流出側に位置する下流側開口部の開口面積よりも大きく形成されている。 Therefore, in the die 10 of the first embodiment, as shown in FIGS. 1 to 4, the billet guide hole 28 for guiding a part of the billet B toward the downstream side is provided in the central region of the mandrel portion 23. It becomes the composition.
The billet guide hole 28 is provided corresponding to the intersection X of the partition walls 1b and 1b. And the upstream opening area located in the inflow side of the billet B of the mandrel part 23 is formed larger than the opening area of the downstream opening part located in the outflow side of the billet B.
　また、前記ビレットガイド穴２８の下流側開口部に対向する側で、かつ連結部２３Ｍの対向する面間には、ビレット導入隙間空間を構成するビレット挿通孔ＢＨ１が設けられている。このビレット挿通孔ＢＨ１は、ビレットＢを導入するビレット導入空間Ｓに導入されたビレットＢ同士を合流させるビレット合流空間を構成するものであり、ビレットガイド穴孔２８から導入されたビレットＢがビレット挿通孔ＢＨ１を経由して押し出されるようになっている。 Further, a billet insertion hole BH1 constituting a billet introduction gap space is provided on the side facing the downstream opening of the billet guide hole 28 and between the facing surfaces of the connecting portion 23M. This billet insertion hole BH1 constitutes a billet joining space for joining the billet B introduced into the billet introduction space S into which the billet B is introduced. The billet B introduced from the billet guide hole 28 is inserted into the billet insertion hole BH1. It is extruded through the hole BH1.
　すなわち、図１，３，５に詳細を示すように、第１実施形態のビレットガイド穴２８は、マンドレル部２３の途中に段部を備えた上流側の直径Φ１に形成された大開口穴部２８Ａと、マンドレル部２３の下部側、つまり仕切壁１ｂ，１ｂの交差部Ｘ側にビレットＢの一部を導入する直径Φ２に形成された小開口穴部２８Ｂとで構成されている。
　そのため、上流側から送り込まれ、かつ押出されたビレットＢの一部は、大開口穴部２８Ａでガイドされて確実に小開口穴部２８Ｂに導入される。
　また、小開口穴部２８Ｂがマンドレル部２３の下部側に設けられているので、マンドレル部２３において小開口穴部２８Ｂの部分の肉厚を大きく採ることができ、押出時の応力に対してダイスの強度を上げることができる。その結果、ダイスの割れを防止することができる。 That is, as shown in detail in FIGS. 1, 3, and 5, the billet guide hole 28 of the first embodiment has a large opening hole portion formed in the upstream diameter Φ <b> 1 having a step portion in the middle of the mandrel portion 23. 28A and a small opening hole 28B formed in a diameter Φ2 for introducing a part of the billet B on the lower side of the mandrel 23, that is, on the crossing portion X side of the partition walls 1b and 1b.
Therefore, a part of the billet B fed from the upstream side and extruded is guided by the large opening hole 28A and reliably introduced into the small opening hole 28B.
Further, since the small opening hole 28B is provided on the lower side of the mandrel portion 23, the thickness of the small opening hole portion 28B can be increased in the mandrel portion 23, and the die is pressed against the stress during extrusion. The strength of can be increased. As a result, it is possible to prevent the die from cracking.
　なお、４個の内側成形用駒２３Ｂにおける各フランジ部２３Ｆのそれぞれの１角部が集まる部位で、その交点Ｐの位置が、仕切り壁によって形成される交差部Ｘに対応するようになっており、また、上記交点Ｐの位置と後に詳細を述べるビレットガイド穴２８の小開口穴部２８Ｂの中心とが一致するように、小開口穴部２８Ｂの位置が設定されている。 In the four inner molding pieces 23B, each corner portion of each flange portion 23F gathers, and the position of the intersection P corresponds to the intersection portion X formed by the partition wall. Further, the position of the small opening hole 28B is set so that the position of the intersection point P and the center of the small opening hole 28B of the billet guide hole 28, which will be described in detail later, coincide.
　次に、以上のような構成の押出ダイス１０による中空形材１の成形方法を説明する。
　オス型部材２０に対して、ビレットＢの押出し方向上流側に配設されたビレット押出装置８０によりビレットＢが送込まれ、かつ押出されると、そのビレットＢは、まず、オス型部材２０のマンドレル部２３およびブリッジ部２４とホルダー部２５との隙間で構成されたビレットＢを導入するビレット導入空間Ｓに導入されると共に、一部がビレットガイド穴２８の大開口穴部２８Ａとに導入される。 Next, a method for forming the hollow member 1 using the extrusion die 10 having the above-described configuration will be described.
When the billet B is fed into the male member 20 by the billet extrusion device 80 disposed on the upstream side in the extrusion direction of the billet B and pushed out, the billet B is first of the male member 20. While being introduced into the billet introduction space S for introducing the billet B formed by the gap between the mandrel part 23 and the bridge part 24 and the holder part 25, a part is introduced into the large opening hole part 28 </ b> A of the billet guide hole 28. The
　ビレット導入空間Ｓに導入されたビレットＢは、第１～第４ブリッジ２４ａ～２４ｄの側面、形材内側成形部２３の側面、前記ビレット挿通穴ＢＨ、ビレット挿通穴ＢＨ１および前記各内側成形用駒２３Ｂのフランジ部２３Ｆの上面部から前記形材成形用外側穴部５０に導かれると共に、その形材成形用外側穴部５０から押出される。
　これに対して、ビレットガイド穴２８の大開口穴部２８Ａに導入されたビレットＢの一部は、大開口穴部２８Ａでガイドされて確実に小開口穴部２８Ｂに導入される。このとき、ビレット挿通穴ＢＨ１からのビレットＢも合流して押出される。 The billet B introduced into the billet introduction space S includes the side surfaces of the first to fourth bridges 24a to 24d, the side surface of the profile member inner molding portion 23, the billet insertion hole BH, the billet insertion hole BH1, and the inner molding pieces. It is guided from the upper surface portion of the flange portion 23F of 23B to the outer member 50 for forming a shape member and is extruded from the outer hole portion 50 for forming a member.
On the other hand, a part of the billet B introduced into the large opening hole portion 28A of the billet guide hole 28 is guided by the large opening hole portion 28A and reliably introduced into the small opening hole portion 28B. At this time, the billet B from the billet insertion hole BH1 also joins and is extruded.
　そして、押出し成形された中空形材１は、バックダイ７０に形成されている形材送出用穴部７０Ａから送り出された後、図示しない保持機構により保持され、且つ所定のストックヤード等に搬入される。 The extruded hollow profile 1 is fed from a profile feed hole 70A formed in the back die 70, and then held by a holding mechanism (not shown) and carried into a predetermined stockyard or the like. The
　次に、図７に基づいて、以上のような第１実施形態の押出ダイス１０により成形される中空形材１を説明する。
　中空形材１は、断面四角形形状の外周壁１ａ，１ａと、これらの外周壁１ａ，１ａの内部に設けられた十文字状の仕切壁１ｂ，１ｂとで構成され、これらの仕切壁１ｂ，１ｂ同士が交差する中央部が交差部Ｘとなっている。そのため、中空形材１は、内部に４個の空間１Ｓを有する断面田の字形となっている。
　このような断面田の字形の中空形材１は、押出しダイス１０の前記形材形成用外側穴部５０および形材形成用内側穴部５１から、ビレットＢを連続して押出すことにより成形されるようになっている。 Next, based on FIG. 7, the hollow shape material 1 shape | molded by the extrusion die 10 of the above 1st Embodiment is demonstrated.
The hollow shape member 1 is composed of outer peripheral walls 1a, 1a having a quadrangular cross section and cross-shaped partition walls 1b, 1b provided inside the outer peripheral walls 1a, 1a, and these partition walls 1b, 1b. A central portion where the two intersect with each other is an intersection X. Therefore, the hollow shape member 1 has a cross-sectional shape having four spaces 1S inside.
The hollow section 1 having such a cross-sectional shape is formed by continuously extruding the billet B from the outer shape forming hole 50 and the inner shape forming hole 51 of the extrusion die 10. It has become so.
　本第１実施形態の押出しダイス１０は以上のように構成されているので、次のような効果を得ることができる。
（１）上流側から送られてきたビレットＢの一部が、マンドレル部２３の中央領域に設けられたビレットガイド穴２８から、４個の内側成形用駒２３Ｂにおける各フランジ部２３Ｆのそれぞれの１角部が集まる交点Ｐに向かって押し出される。その交点Ｐの位置は、仕切り壁によって形成される交差部Ｘに対応しており、さらに、交点Ｐとビレットガイド穴２８の小開口穴部２８Ｂの中心とは同一線上に一致しているので、小開口穴部２８Ｂを経由したビレットＢは交点Ｐを経由して押出される。そのため、交差部Ｘを容易に成形することができる。その結果、押出加工力が大きな高力系合金、特に、いわゆる７０００系といった高強度アルミニウム合金からなるビレットを押出して、複雑形状の仕切り壁が設けられた中空形材を容易に成形することができる。 Since the extrusion die 10 of the first embodiment is configured as described above, the following effects can be obtained.
(1) A part of the billet B sent from the upstream side is sent from the billet guide hole 28 provided in the central region of the mandrel part 23 to each of the flange parts 23F of the four inner molding pieces 23B. It is pushed out toward the intersection P where the corners gather. The position of the intersection P corresponds to the intersection X formed by the partition wall, and furthermore, the intersection P and the center of the small opening hole 28B of the billet guide hole 28 coincide with each other on the same line. The billet B that has passed through the small opening hole 28B is extruded through the intersection point P. Therefore, the intersection X can be easily formed. As a result, a high-strength alloy having a large extrusion processing force, in particular, a billet made of a high-strength aluminum alloy such as a so-called 7000 series can be extruded to easily form a hollow shape member provided with a complex-shaped partition wall. .
（２）ビレットガイド穴２８は、マンドレル部２３の上部側に形成された大開口穴部２８Ａと、マンドレル部２３の下部側に形成された小開口穴部２８Ｂとの二段構成となっており、上流側から押出されたビレットＢの一部は、大開口穴部２８Ａでガイドされて確実に小開口穴部２８Ｂに導入される。その結果、仕切り壁を形成するための充分なビレットを確保することができる。 (2) The billet guide hole 28 has a two-stage configuration of a large opening hole 28A formed on the upper side of the mandrel part 23 and a small opening hole 28B formed on the lower side of the mandrel part 23. A part of the billet B extruded from the upstream side is guided by the large opening hole 28A and reliably introduced into the small opening hole 28B. As a result, a sufficient billet for forming the partition wall can be secured.
（３）ブリッジ部２４の第１～第４ブリッジ２４ａ～２４ｄの先端外周面２４Ａと、ブリッジ保持部２６のブリッジ受座面２６Ｂとの係合面が押出し方向下流側に向かってダイス中心に近づくような傾斜面に形成されているので、ホルダー部２５のブリッジ受座面２６Ｂの基端部と、この基端部から内側成形用駒２３において押出し方向と直交する方向の作用点までの距離を小さくすることができる。そのため、内側成形用駒２３の作用点に生じるモーメントを小さくすることができ、結果的に第１～第４ブリッジ２４ａ～２４ｄの強度を大きくすることができるので、それらの第１～第４ブリッジ２４ａ～２４ｄの破断を防止することができる。その結果、押出加工力が大きな高力系合金、特に、いわゆる７０００系といった高強度アルミニウム合金からなるビレットＢを押出し成形する場合でも、高速押出しができると共にダイスの長寿命化を図れるようになる。 (3) The engagement surface between the outer peripheral surface 24A of the first to fourth bridges 24a to 24d of the bridge portion 24 and the bridge seating surface 26B of the bridge holding portion 26 approaches the center of the die toward the downstream side in the pushing direction. Therefore, the distance between the base end portion of the bridge seating surface 26B of the holder portion 25 and the action point in the direction orthogonal to the extrusion direction in the inner molding piece 23 from the base end portion is set. Can be small. Therefore, the moment generated at the action point of the inner molding piece 23 can be reduced, and as a result, the strength of the first to fourth bridges 24a to 24d can be increased. The breakage of 24a to 24d can be prevented. As a result, even when a billet B made of a high-strength alloy having a large extrusion processing force, particularly a high-strength aluminum alloy such as a so-called 7000 series, is extruded, high-speed extrusion can be achieved and the life of the die can be extended.
（４）各ブリッジ２４ａ～２４ｄとブリッジ受座面２６Ｂとが、ブリッジ部圧入構造Ｍにより一体的に構成されているので、各ブリッジ２４ａ～２４ｄ、ひいてはマンドレル部２３の強度を確保することができ、ビレットＢの押出し時の圧力をオス型部材２０の全体で受けることができる。その結果、押出加工力が大きな高力系合金、特に、いわゆる７０００系といった高強度アルミニウム合金からなるビレットＢを押出し成形する場合でも、高速押出しができると共にダイスの長寿命化を図れるようになる。 (4) Since the bridges 24a to 24d and the bridge seating surface 26B are integrally formed by the bridge portion press-fitting structure M, the strength of the bridges 24a to 24d and consequently the mandrel portion 23 can be secured. The pressure at the time of extrusion of the billet B can be received by the entire male member 20. As a result, even when a billet B made of a high-strength alloy having a large extrusion processing force, particularly a high-strength aluminum alloy such as a so-called 7000 series, is extruded, high-speed extrusion can be achieved and the life of the die can be extended.
（５）各ブリッジ２４ａ～２４ｄとブリッジ押え部２６Ａとは、それらの間にわたってあけられた打込穴に打込まれた回り止め用の固定部材２７により固定されているので、各ブリッジ２４ａ～２４ｄの回転を防止することができ、これにより、精度の高い中空形材１を成形することができる。 (5) Since the bridges 24a to 24d and the bridge pressing portion 26A are fixed by the detent fixing member 27 driven into a driving hole formed therebetween, the bridges 24a to 24d are fixed. Can be prevented, and thereby the hollow shape member 1 with high accuracy can be formed.
　次に、図８、図９を参照して、本発明の押出ダイスの第２実施形態を説明する。
　前記第１実施形態では、その押出ダイス１０のビレットガイド穴２８の形状が、大開口穴部２８Ａと小開口穴部２８Ｂとの二段構造となっていたものを、本第２実施形態の押出ダイス１１では、テーパー状穴のビレットガイド穴３８としたものである。しかし、その他の部材、構造等は、第１実施形態の押出ダイス１０と全く同一である。
　したがって、第１実施形態と同一構造、同一部材には同一符号を付して、異なる部分だけを説明する。ここで、マンドレル部２３は、ビレットガイド穴２８，３８の形状が異なるだけなので、第２実施形態でも第１実施形態と同一符号の２３を付して説明する。 Next, a second embodiment of the extrusion die of the present invention will be described with reference to FIGS.
In the first embodiment, the shape of the billet guide hole 28 of the extrusion die 10 has a two-stage structure of a large opening hole 28A and a small opening hole 28B. The die 11 is a billet guide hole 38 having a tapered hole. However, other members, structures, etc. are exactly the same as those of the extrusion die 10 of the first embodiment.
Therefore, the same structure and the same members as those of the first embodiment are denoted by the same reference numerals, and only different portions will be described. Here, since the mandrel portion 23 is different only in the shape of the billet guide holes 28 and 38, the second embodiment will be described with the same reference numeral 23 as in the first embodiment.
　本第２実施形態の押出ダイス１１のビレットガイド穴３８は、その形状が前記マンドレル部２３の上流側開口部から下流側開口部側に行くにしたがって小さくなるテーパー状に形成されている。
　ここで、マンドレル部３８の上流側開口部の直径φ１は、前記第１実施形態の大開口穴部２８Ａの直径φ１と略等しくなっており、テーパー状穴の下流側開口部の直径φ２は、前記第１実施形態の小開口穴部２８Ｂの直径φ２と略等しくなっている。 The billet guide hole 38 of the extrusion die 11 of the second embodiment is formed in a taper shape whose shape decreases from the upstream opening of the mandrel 23 toward the downstream opening.
Here, the diameter φ1 of the upstream opening of the mandrel part 38 is substantially equal to the diameter φ1 of the large opening hole 28A of the first embodiment, and the diameter φ2 of the downstream opening of the tapered hole is It is substantially equal to the diameter φ2 of the small opening hole 28B of the first embodiment.
　なお、本第２実施形態の押出ダイス１１のビレットガイド穴３８においては、前記第１実施形態と同様に、４個の内側成形用駒２３Ｂにおける各フランジ部２３Ｆのそれぞれの１角部が集まる部位で、その交点の位置が、仕切り壁によって形成される交差部Ｘに対応するようになっており、また、上記交点の位置とビレットガイド穴３８の中心とが一致するように、ビレットガイド穴３８の位置が設定されている。 In the billet guide hole 38 of the extrusion die 11 of the second embodiment, as in the first embodiment, the respective corners of the flange portions 23F of the four inner molding pieces 23B are gathered. Thus, the position of the intersection point corresponds to the intersection X formed by the partition wall, and the billet guide hole 38 so that the position of the intersection point coincides with the center of the billet guide hole 38. The position of is set.
　以上のような第２実施形態の押出ダイス１１によれば、前記第１実施形態の押出ダイス１０と同様に、図７に示す断面田の字形状の中空形材１を成形することができる。 According to the extrusion die 11 of the second embodiment as described above, the hollow section 1 having a cross-sectional shape shown in FIG. 7 can be formed in the same manner as the extrusion die 10 of the first embodiment.
　以上のような、第２実施形態の押出ダイス１１においても、前記第１実施形態の押出ダイス１０と略同様の作用と、（１）～（５）と略同様の効果を得ることができる他、
（６）ビレットガイド穴３８が、マンドレル部２３の上流側開口部から下流側開口部側に行くにしたがって小さくなるテーパー状に形成されているので、ビレットＢの流れがスムーズになる、という効果を得ることができる。 In the extrusion die 11 of the second embodiment as described above, substantially the same operation as the extrusion die 10 of the first embodiment and substantially the same effects as (1) to (5) can be obtained. ,
(6) Since the billet guide hole 38 is formed in a tapered shape that decreases from the upstream opening of the mandrel 23 toward the downstream opening, the billet B flows smoothly. Obtainable.
　次に、図１０、図１１を参照して、本発明の押出ダイスの第３実施形態を説明する。
　前記第１、第２実施形態の押出ダイス１０、１１では、ブリッジ部２４の第１～４ブリッジ２４ａ～２４ｄの下部とブリッジ受座面２６Ｂの下部とが、メス型部材３０側に行くにしたがってダイス中心側に近づく方向に傾斜すると共に、それらが、ブリッジ部圧入構造Ｍで係合された構成であった。
　これに対して、第３実施形態の押出ダイス１２では、マンドレル部３３を支持するブリッジ部３４の第１～４ブリッジ３４ａ～３４ｄの先端外周面３４Ａと、これらの各ブリッジ３４ａ～３４ｄを保持するホルダー部１２５の内周面の一部とが、ブリッジ部焼き嵌め構造Ｎにより一体化された構成としたものである。 Next, a third embodiment of the extrusion die of the present invention will be described with reference to FIGS.
In the extrusion dies 10 and 11 of the first and second embodiments, the lower part of the first to fourth bridges 24a to 24d of the bridge part 24 and the lower part of the bridge seating surface 26B go to the female member 30 side. While it inclines in the direction which approaches the die center side, they were the structures engaged by the bridge part press-fit structure M.
On the other hand, in the extrusion die 12 of the third embodiment, the distal end outer peripheral surface 34A of the first to fourth bridges 34a to 34d of the bridge portion 34 that supports the mandrel portion 33 and the bridges 34a to 34d are held. A part of the inner peripheral surface of the holder part 125 is integrated with the bridge part shrink fitting structure N.
　ここで、焼き嵌めとは、熱を利用して強い接合を得る方法であり、穴のあいた円板などの部材を加熱膨張させて、穴の直径よりやや大きく作った軸を嵌め入れ、その後、冷却して固定する嵌め合いの方法を言い、締め付けタイプの接合として使われている。そして、焼き嵌めにより、両者（上記例では、円板と軸）は固着状態になる。 Here, shrink fitting is a method of obtaining a strong joint using heat, by heating and expanding a member such as a disc with a hole, and inserting a shaft made slightly larger than the diameter of the hole, It is a method of fitting that is cooled and fixed, and is used as a fastening type joint. Then, both of them (in the above example, the disk and the shaft) are fixed by shrink fitting.
　本第３実施形態の押出ダイス１２のオス型部材１２０は、前記第１，２実施形態の押出ダイス１０，１１と全体形状は略同じであるが、押出ダイス１０等に形成されている前記ブリッジ押え部２６Ａを有しない点だけ形状が異なっている。 The male member 120 of the extrusion die 12 of the third embodiment has substantially the same shape as the extrusion dies 10 and 11 of the first and second embodiments, but the bridge formed in the extrusion die 10 and the like. The shape is different only in that the holding portion 26A is not provided.
　本第３実施形態のスパイダー３２は、中空形材１の内側形状に対応する上記マンドレル部３３と、このマンドレル部３３を支持すると共に当該マンドレル部３３を支持するブリッジ部３４とで構成されている。
　ブリッジ部３４は、マンドレル部３３の周囲から外方に略Ｘ字状に突出した複数個、すなわち第１ブリッジ３４ａ、第２ブリッジ３４ｂ、第３ブリッジ３４ｃ、および第４ブリッジ３４ｄの４個で構成されており、各ブリッジ３４ａ～３４ｄ間の空間が前記ビレット導入空間Ｓとなっている。 The spider 32 according to the third embodiment includes the mandrel portion 33 corresponding to the inner shape of the hollow shape member 1 and a bridge portion 34 that supports the mandrel portion 33 and supports the mandrel portion 33. .
The bridge portion 34 is composed of a plurality of protrusions that protrude outwardly from the periphery of the mandrel portion 33 in a substantially X shape, that is, a first bridge 34a, a second bridge 34b, a third bridge 34c, and a fourth bridge 34d. The space between the bridges 34a to 34d is the billet introduction space S.
　マンドレル部３３の中央領域には、ビレットＢの一部を下流側に向けて案内する前記ビレットガイド穴２８が設けられている。このビレットガイド穴２８は、前記仕切壁１ｂ，１ｂの交差部Ｘに対応して形成されている。そして、ビレットガイド穴２８は、前述のように、大開口穴部２８Ａと小開口穴部２８Ｂとで構成されている。
　上記ビレットガイド穴２８は、前記第１実施形態の押出しダイス１０におけるビレットガイド穴２８と同様の構成となっている。 In the central region of the mandrel portion 33, the billet guide hole 28 for guiding a part of the billet B toward the downstream side is provided. The billet guide hole 28 is formed corresponding to the intersection X of the partition walls 1b and 1b. And the billet guide hole 28 is comprised by the large opening hole part 28A and the small opening hole part 28B as mentioned above.
The billet guide hole 28 has the same configuration as the billet guide hole 28 in the extrusion die 10 of the first embodiment.
　各ブリッジ３４ａ～３４ｄの外周の下端部とメス型部材３０のホルダー部受面３０Ａとの間には、各ブリッジ３４ａ～３４ｄを支持するブリッジ部保持機構である支持部材３６が介在されており、この支持部材３６は、その両端部が各ブリッジ３４ａ～３４ｄの下端部とメス型部材３０のホルダー部受面３０Ａとにわたって固定されている。 Between the lower end of the outer periphery of each bridge 34a to 34d and the holder receiving surface 30A of the female member 30, a support member 36 that is a bridge holding mechanism for supporting each bridge 34a to 34d is interposed. Both ends of the support member 36 are fixed across the lower ends of the bridges 34 a to 34 d and the holder receiving surface 30 A of the female member 30.
　したがって、各ブリッジ３４ａ～３４ｄの下端部とメス型部材３０のホルダー部受面３０Ａとの間には、上記支持部材３６の高さ寸法分の隙間が形成されていることになる。そして、この隙間が、隣り合う前記ブリッジ挿入空間Ｓ内に導入されたビレットＢ同士が挿通し合うトンネル状のビレット挿通穴ＢＨとなっている。このビレット挿通穴ＢＨは、前記第１実施形態のビレット挿通穴ＢＨと同様の機能を有するものであり、ビレット合流空間およびビレット流入隙間空間を構成するものである。 Therefore, a gap corresponding to the height dimension of the support member 36 is formed between the lower ends of the bridges 34a to 34d and the holder receiving surface 30A of the female member 30. The gap serves as a tunnel-shaped billet insertion hole BH through which billets B introduced into adjacent bridge insertion spaces S are inserted. The billet insertion hole BH has a function similar to that of the billet insertion hole BH of the first embodiment, and constitutes a billet merge space and a billet inflow gap space.
　また、前記マンドレル部３３の前記ビレットＢの流れの下流側端部には、前記内側成形用駒２３Ｂと略同一形状の４個の内側成形用駒３３Ｂが設けられており、これらの内側成形用駒３３Ｂにはそれぞれフランジ部３３Ｆが設けられている。
　各内側成形用駒３３Ｂは、メス型部材３０側に突出し、かつ、当該メス型部材３０に形成されている前記外側成形用ダイス穴部３０Ｂ内に挿入されるようになっている。 Further, four inner molding pieces 33B having substantially the same shape as the inner molding piece 23B are provided at the downstream end portion of the flow of the billet B of the mandrel portion 33. Each piece 33B is provided with a flange portion 33F.
Each inner molding piece 33 </ b> B protrudes toward the female mold member 30 and is inserted into the outer molding die hole 30 </ b> B formed in the female mold member 30.
　このような内側成形用駒３３Ｂは、図７に示すような、断面田の字形状の中空形材１の４つの内部空間１Ｓをそれぞれ形成するようになっている。そして、これらの内側成形用駒３３Ｂは、前記第１，２実施形態の内側成形用駒２３Ｂと略同様の形状の四角形状に形成され、かつ、四角形状に配置されている。 Such an inner molding piece 33B forms four internal spaces 1S of the hollow section 1 having a cross-sectional shape as shown in FIG. These inner molding pieces 33B are formed in a rectangular shape having substantially the same shape as the inner molding pieces 23B of the first and second embodiments, and are arranged in a square shape.
　以上のような第３実施形態の押出ダイス１２によれば、前記図７に示す断面田の字形状の中空形材１を成形することができる。 According to the extrusion die 12 of the third embodiment as described above, the hollow section 1 having a cross-sectional shape shown in FIG. 7 can be formed.
　以上のような、第３実施形態の押出ダイス１２においても、前記第１実施形態の押出ダイス１０と略同様の作用と、（１）、（２）、（６）と略同様の効果を得ることができる他、次のような効果を得ることができる。
　（７）各ブリッジ３４ａ～３４ｄの先端外周面３４Ａとホルダー部１２５の内周面の一部とが、ブリッジ部焼き嵌め構造Ｎにより一体的に構成されているので、各ブリッジ３４ａ～３４ｄ、ひいてはマンドレル部３３の強度を確保することができ、ビレットＢの押出し時の圧力をオス型部材２０の全体で受けることができる。その結果、押出加工力が大きな高力系合金、特に、いわゆる７０００系といった高強度アルミニウム合金からなるビレットＢを押出し成形する場合でも、高速押出しができると共にダイスの長寿命化を図れるようになる。 In the extrusion die 12 of the third embodiment as described above, substantially the same operation as the extrusion die 10 of the first embodiment and substantially the same effect as (1), (2), and (6) are obtained. In addition, the following effects can be obtained.
(7) Since the outer peripheral surface 34A of each bridge 34a to 34d and a part of the inner peripheral surface of the holder portion 125 are integrally formed by the bridge portion shrink-fitting structure N, each bridge 34a to 34d, The strength of the mandrel portion 33 can be secured, and the pressure at the time of extrusion of the billet B can be received by the entire male member 20. As a result, even when a billet B made of a high-strength alloy having a large extrusion processing force, particularly a high-strength aluminum alloy such as a so-called 7000 series, is extruded, high-speed extrusion can be achieved and the life of the die can be extended.
　（８）各ブリッジ３４ａ～３４ｄの下端部には、それぞれの下端部とメス型部材３０のホルダー部受面３０Ａとにわたって支持部材３６が固定され、この支持部材３６の高さ寸法分の隙間が形成されている。支持部材３６は、隣り合うブリッジ挿入空間Ｓ内に導入されたビレットＢ同士が挿通し合うトンネル状のビレット挿通穴ＢＨを形成することができると共に、各ブリッジ３４ａ～３４ｄを支持することができるので、２つの役割を果たすことができ、部材の有効利用ができる。 (8) Support members 36 are fixed to the lower ends of the bridges 34a to 34d across the lower ends and the holder receiving surface 30A of the female member 30, and a gap corresponding to the height dimension of the support members 36 is provided. Is formed. The support member 36 can form a tunnel-shaped billet insertion hole BH through which billets B introduced into adjacent bridge insertion spaces S are inserted, and can support the bridges 34a to 34d. Two roles can be played, and the member can be used effectively.
　次に、図１２を参照して、本発明の押出ダイスの第４実施形態を説明する。
　本第４実施形態の押出ダイス１３では、そのビレットガイド穴３８の形状を、前記第３実施形態の押出ダイス１２におけるビレットガイド穴２８と異なるものとした。そして、ビレットガイド穴３８の形状は、第２実施形態の押出ダイス１１のビレットガイド穴３８の形状と同一のものである。
　その他の部材、構造等は、第３実施形態の押出ダイス１２と全く同一である。したがって、第３実施形態と同一構造、同一部材には同一符号を付して、異なる部分のみを説明する。 Next, a fourth embodiment of the extrusion die of the present invention will be described with reference to FIG.
In the extrusion die 13 of the fourth embodiment, the shape of the billet guide hole 38 is different from the billet guide hole 28 in the extrusion die 12 of the third embodiment. The shape of the billet guide hole 38 is the same as the shape of the billet guide hole 38 of the extrusion die 11 of the second embodiment.
Other members, structures and the like are exactly the same as those of the extrusion die 12 of the third embodiment. Therefore, the same structure and the same members as those of the third embodiment are denoted by the same reference numerals, and only different portions will be described.
　本第４実施形態の押出ダイス１３のビレットガイド穴３８は、その形状が前記マンドレル部３３の上流側開口部から下流側開口部側に行くにしたがって小さくなるテーパー状に形成されている。 The billet guide hole 38 of the extrusion die 13 according to the fourth embodiment is formed in a tapered shape whose shape decreases from the upstream opening of the mandrel 33 toward the downstream opening.
　第４実施形態の押出ダイス１３では、４個の前記内側成形用駒３３Ｂが四角形状に配置されているので、前記図７に示す断面田の字形状の中空形材１を成形することができる。 In the extrusion die 13 of the fourth embodiment, since the four inner molding pieces 33B are arranged in a quadrangular shape, the hollow section 1 having a cross-sectional shape shown in FIG. 7 can be molded. .
　以上のような、第４実施形態の押出ダイス１３においても、前記第３実施形態の押出ダイス１２と略同様の作用と、前記（１）、（２）、（７）、（８）と略同様の効果を得ることができる。 In the extrusion die 13 of the fourth embodiment as described above, substantially the same operation as that of the extrusion die 12 of the third embodiment and the abbreviations (1), (2), (7), and (8). Similar effects can be obtained.
　次に、図１３～図１６を参照して、本発明の押出ダイスの第５実施形態を説明する。
　本第５実施形態の押出ダイス１４は、前記第３，４実施形態と同様に、各ブリッジ４４ａ～４４ｄの先端外周面４４Ａとホルダー部１２５の内周面の一部とが、前記ブリッジ部焼き嵌め構造Ｎにより一体的に固定されており、各ブリッジ４４ａ～４４ｄおよびマンドレル部４３の強度が確保されている。 Next, a fifth embodiment of the extrusion die of the present invention will be described with reference to FIGS.
In the extrusion die 14 of the fifth embodiment, as in the third and fourth embodiments, the tip outer peripheral surface 44A of each bridge 44a to 44d and a part of the inner peripheral surface of the holder portion 125 are It is fixed integrally by the fitting structure N, and the strength of each bridge 44a to 44d and the mandrel portion 43 is ensured.
　押出ダイス１４では、そのビレットガイド穴４８の構成を、前記第３、第４実施形態の押出ダイス１２，１３におけるビレットガイド穴２８，３８の構成と異なるものとしたが、その他の部材、構造等は、前記第３，４実施形態の押出ダイス１３，１４と全く同一である。
　したがって、第３，４実施形態と同一構造、同一部材には同一符号を付して、異なる部分のみを説明する。 In the extrusion die 14, the configuration of the billet guide hole 48 is different from the configuration of the billet guide holes 28 and 38 in the extrusion dies 12 and 13 of the third and fourth embodiments, but other members, structures, etc. Is exactly the same as the extrusion dies 13 and 14 of the third and fourth embodiments.
Therefore, the same structure and the same members as those of the third and fourth embodiments are denoted by the same reference numerals, and only different portions will be described.
　本第５実施形態の押出ダイス１４では、図１６に示すような、４箇所の交差部Ｘを有する断面格子状の中空形材２を成形することができるように構成されている。 The extrusion die 14 of the fifth embodiment is configured such that a cross-sectional lattice-shaped hollow shape member 2 having four intersecting portions X as shown in FIG. 16 can be formed.
　前記オス型部材１２０は、上記中空形材２の内側形状を成形するマンドレル部４３と、このマンドレル部４３を支持すると共に当該マンドレル部４３の周囲から外方に略Ｘ字状に突出したブリッジ部４４とで構成されたスパイダー４２を備えて構成され、このスパイダー４２は、上記ブリッジ部４４を介してホルダー部１２５と一体的に連結されている。 The male member 120 includes a mandrel portion 43 that forms the inner shape of the hollow shape member 2 and a bridge portion that supports the mandrel portion 43 and protrudes outward from the periphery of the mandrel portion 43 in a substantially X shape. The spider 42 is configured to be integrally connected to the holder portion 125 via the bridge portion 44.
　上記ブリッジ部４４は、図１３中、時計回りに配置された第１ブリッジ４４ａ、第２ブリッジ４４ｂ、第３ブリッジ４４ｃ、および第４ブリッジ４４ｄの４個で構成されている。そして、各ブリッジ４４ａ～４４ｄ間の空間がビレットＢを導入するビレット導入空間Ｓとなっている。 In FIG. 13, the bridge portion 44 is composed of four pieces, a first bridge 44a, a second bridge 44b, a third bridge 44c, and a fourth bridge 44d, which are arranged clockwise. A space between the bridges 44a to 44d is a billet introduction space S for introducing the billet B.
　前記ビレットガイド穴４８は、図１３，１４に示すように、マンドレル部４３の上流側に形成された大開口穴４８Ａと、マンドレル部４３の下流側、つまり前記中空形材２の仕切壁１ｂ，１ｂの交差部Ｘを形成できる位置に対応する小開口穴４８Ｂとの二段構成とされている。
　大開口穴４８Ａは、平面視が略正方形形状でマンドレル部４３の下部側に所定寸法入り込んだ凹部状に形成されており、この大開口穴４８Ａの底面部に複数（実施形態では４箇所）の小開口穴４８Ｂが形成されている。この小開口穴４８Ｂは大開口穴４８Ａの底面部からマンドレル部４３の下流側に向けて穴あけ形成されている。 As shown in FIGS. 13 and 14, the billet guide hole 48 includes a large opening hole 48 </ b> A formed on the upstream side of the mandrel part 43, and the downstream side of the mandrel part 43, that is, the partition wall 1 b of the hollow profile 2. It has a two-stage configuration with a small opening hole 48B corresponding to a position where the intersecting portion X of 1b can be formed.
The large opening hole 48A has a substantially square shape in plan view and is formed in a recessed shape with a predetermined dimension on the lower side of the mandrel portion 43. A plurality (four in the embodiment) of the bottom surface of the large opening hole 48A are formed. A small opening hole 48B is formed. The small opening hole 48B is formed from the bottom surface portion of the large opening hole 48A toward the downstream side of the mandrel portion 43.
　第５実施形態の押出ダイス１４では、４箇所の交差部Ｘに対応できるように、９個の内側成形用駒４３Ｂが設けられている。これらの内側成形用駒４３Ｂは、前記第１実施形態の押出ダイス１０の内側成形用駒２３Ｂと略同一形状の四角形状に形成され、マンドレル４３の下部に前記連結部２３と同様の構成の連結部を介して設けられている。 In the extrusion die 14 of the fifth embodiment, nine inner molding pieces 43B are provided so as to correspond to the four intersecting portions X. These inner molding pieces 43B are formed in a rectangular shape having substantially the same shape as the inner molding piece 23B of the extrusion die 10 of the first embodiment, and are connected to the lower part of the mandrel 43 in the same configuration as the connecting portion 23. It is provided via the part.
　そして、これらの内側成形用駒４３Ｂは、図１５に示すように、全体で四角形状となるように配置されている。また、各内側成形用駒４３Ｂ間の隙間Ｌ２により、前記形材成形用内側穴５１が構成されている。さらに、９個の内側成形用駒４３Ｂは、メス型１３０の外側成形ダイス穴部１３０Ｂ内に挿入されるようになっている。 And these inner forming pieces 43B are arranged so as to form a square shape as a whole, as shown in FIG. The shape forming inner hole 51 is constituted by the gap L2 between the inner forming pieces 43B. Further, the nine inner molding pieces 43B are inserted into the outer molding die hole portion 130B of the female die 130.
　なお、第５実施形態の押出ダイス１４では、そのマンドレル４３が、前記第４実施形態の押出ダイス１３のマンドレル部３３，３３と略同じ大きさとなっており、そのマンドレル部４３に９個の内側成形用駒４３Ｂが設けられている。そのため、これらの内側成形用駒４３Ｂの一つ一つの大きさは、第４実施形態の押出ダイス１３の４個内側成形用駒３３Ｂの一つ一つの大きさより小さく形成されている。内側成形用駒４３Ｂの一つ一つを大きく形成する場合、マンドレル４３を大きくすればよい。 In addition, in the extrusion die 14 of the fifth embodiment, the mandrel 43 has substantially the same size as the mandrel portions 33 and 33 of the extrusion die 13 of the fourth embodiment, and there are nine inner sides in the mandrel portion 43. A molding piece 43B is provided. Therefore, the size of each of the inner molding pieces 43B is formed smaller than the size of each of the four inner molding pieces 33B of the extrusion die 13 of the fourth embodiment. When each of the inner molding pieces 43B is formed to be large, the mandrel 43 may be enlarged.
　また、９個の内側成形用駒４３Ｂにおける各フランジ部４３Ｆのそれぞれの１角部が集まる４箇所の部位で、それぞれの交点Ｐの位置が、仕切り壁によって形成される交差部Ｘに対応するようになっており、さらに、上記４箇所の交点Ｐの位置と４個のビレットガイド穴４８の各小開口穴部４８Ｂの中心とが一致するように、小開口穴部４８Ｂの位置が設定されている。 Further, at the four portions where the corner portions of the flange portions 43F of the nine inner molding pieces 43B are gathered, the positions of the intersection points P correspond to the intersection portions X formed by the partition walls. Further, the positions of the small opening holes 48B are set so that the positions of the four intersection points P and the centers of the small opening holes 48B of the four billet guide holes 48 coincide with each other. Yes.
　次に、図１６に基づいて、以上のような第５実施形態の押出ダイス１４により成形される中空形材２を説明する。
　中空形材２は、断面四角形形状に形成され、互いに対向配置された二対の外周壁２ａ，２ａと、その内部に設けられた縦横２本づつの仕切壁２ｂ，２ｂとで構成され、内部に９個の空間２Ｓを有する断面格子状となっている。そして、仕切壁２ｂ，２ｂが交差する交差部Ｘが４箇所に設けられている。
　なお、仕切壁２ｂ，２ｂの板厚寸法は同じとなっている。 Next, based on FIG. 16, the hollow shape material 2 shape | molded by the extrusion die 14 of the above 5th Embodiment is demonstrated.
The hollow shape member 2 is formed of two pairs of outer peripheral walls 2a and 2a that are formed in a quadrangular cross section and are arranged to face each other, and two vertical and horizontal partition walls 2b and 2b provided inside the hollow shape member 2 The cross-sectional lattice shape has nine spaces 2S. And the crossing part X where the partition walls 2b and 2b cross is provided in four places.
In addition, the plate | board thickness dimension of the partition walls 2b and 2b is the same.
　このような第５実施形態の押出ダイス１４では、前記第３，４実施形態の押出ダイス　と略同様の作用と、前記（１）、（２）、（７）、（８）と略同様の効果を得ることができる他、次のような効果を得ることができる。
　（９）上流側から送られてきたビレットＢの一部が、マンドレル部４３の中央領域に設けられたビレットガイド穴４８の大開口穴４８Ａから小開口穴４８Ｂを経て、９個の内側成形用駒４３Ｂにおける各フランジ部４３Ｆのそれぞれの１角部が集まる４箇所の交点Ｐに向かって押し出される。それぞれの交点Ｐの位置は、仕切り壁によって形成される４箇所の交差部Ｘに対応しており、さらに、各交点Ｐと各ビレットガイド穴４８の小開口穴部４８Ｂの中心とはそれぞれ同一線上に一致しているので、各小開口穴部４８Ｂを経由したビレットＢは各交点Ｐを経由して押出される。そのため、４つの交差部Ｘを容易に成形することができる。 In such an extrusion die 14 of the fifth embodiment, substantially the same operation as the extrusion die of the third and fourth embodiments and substantially the same as the above (1), (2), (7), (8). In addition to the effects, the following effects can be obtained.
(9) A part of the billet B sent from the upstream side passes through the large opening hole 48A of the billet guide hole 48 provided in the central region of the mandrel portion 43, and passes through the small opening hole 48B, thereby nine inner moldings. Pushed toward four intersections P where the corners of the flanges 43F of the piece 43B gather. The position of each intersection P corresponds to four intersections X formed by the partition walls, and each intersection P and the center of the small opening hole 48B of each billet guide hole 48 are on the same line. Therefore, the billet B passing through each small opening hole 48B is pushed out via each intersection P. Therefore, the four intersections X can be easily formed.
　次に、図１７～２０を参照して、本発明の押出ダイスの第６実施形態を説明する。
　第５実施形態の押出ダイス１４では、大開口穴４８Ａの底面部に４個の小開口穴４８Ｂが設けられていたものを、第６実施形態の押出ダイス１５では、大開口穴５８Ａの底面部に９個の小開口穴５８Ｂが設けられた構成としたものである。 Next, a sixth embodiment of the extrusion die of the present invention will be described with reference to FIGS.
In the extrusion die 14 of the fifth embodiment, four small opening holes 48B are provided in the bottom surface portion of the large opening hole 48A. In the extrusion die 15 of the sixth embodiment, the bottom surface portion of the large opening hole 58A. In this configuration, nine small opening holes 58B are provided.
　第６実施形態の押出ダイス１５では、上述のように、前記第５実施形態の押出ダイス１４とは、ビレットガイド穴４８Ｂ，５８Ｂの形状が異なるだけであり、その他の部材、構造等は、第５実施形態の押出ダイス１４と全く同一である。したがって、第５実施形態と同一構造、同一部材には同一符号を付して、異なる部分のみを説明する。 As described above, the extrusion die 15 of the sixth embodiment is different from the extrusion die 14 of the fifth embodiment only in the shape of the billet guide holes 48B and 58B. Other members, structures, etc. This is exactly the same as the extrusion die 14 of the fifth embodiment. Therefore, the same structure and the same members as those of the fifth embodiment are denoted by the same reference numerals, and only different portions will be described.
　本第６実施形態の押出ダイス１５では、図２０に示すような、断面格子状の中空形材３を成形することができるように構成されている。そして、この中空形材３では、９箇所の交差部Ｘが設けられている。
　押出ダイス１５の前記オス型部材１２０は、中空形材２の内側形状を成形するマンドレル部５３と、このマンドレル部５３を支持すると共に当該マンドレル部５３の周囲から外方に略Ｘ字状に突出したブリッジ部５４とで構成されたスパイダー５２を備え、このスパイダー５２は、上記ブリッジ部５４を介して前記ホルダー部１２５と一体的に連結されている。 The extrusion die 15 of the sixth embodiment is configured such that a hollow profile 3 having a cross-sectional lattice shape as shown in FIG. 20 can be formed. And in this hollow shape member 3, nine intersections X are provided.
The male member 120 of the extrusion die 15 supports a mandrel portion 53 that forms the inner shape of the hollow shape member 2, and supports the mandrel portion 53 and protrudes outward from the periphery of the mandrel portion 53 in a substantially X shape. The spider 52 includes a bridge portion 54, and the spider 52 is integrally connected to the holder portion 125 via the bridge portion 54.
　また、各ブリッジ５４ａ～５４ｄの先端外周面５４Ａとホルダー１２５の内周面の一部とは、前記ブリッジ部焼き嵌め構造Ｎにより一体的に固定されており、各ブリッジ５４ａ～５４ｄおよびマンドレル部５３の強度が確保されている。 Further, the outer peripheral surface 54A of each of the bridges 54a to 54d and a part of the inner peripheral surface of the holder 125 are integrally fixed by the bridge portion shrink-fitting structure N, and the bridges 54a to 54d and the mandrel portion 53 are fixed. The strength of is secured.
　上記ブリッジ部５４は、図１７中、時計回りに配置された第１ブリッジ５４ａ、第２ブリッジ５４ｂ、第３ブリッジ５４ｃ、および第４ブリッジ５４ｄの４個で構成されている。そして、各ブリッジ５４ａ～５４ｄ間の空間がビレットＢを導入するビレット導入空間Ｓとなっている。 In FIG. 17, the bridge portion 54 is composed of four pieces, a first bridge 54a, a second bridge 54b, a third bridge 54c, and a fourth bridge 54d, which are arranged clockwise. A space between the bridges 54a to 54d is a billet introduction space S for introducing the billet B.
　前記ビレットガイド穴５８は、図１８，１９に示すように、マンドレル部５３の上流側に形成された大開口穴５８Ａと、マンドレル部５３の下流側、つまり仕切壁１ｂ，１ｂの交差部Ｘに対応するように形成された小開口穴５８Ｂとで構成されている。 As shown in FIGS. 18 and 19, the billet guide hole 58 is formed at the large opening hole 58A formed on the upstream side of the mandrel portion 53 and on the downstream side of the mandrel portion 53, that is, at the intersection X of the partition walls 1b and 1b. It consists of a small opening hole 58B formed so as to correspond.
　大開口穴５８Ａは、前記第５実施形態の押出しダイス１４の前記大開口穴４８Ａと略同様の形状、すなわち、平面視が略正方形形状でマンドレル部５３の下部側に所定寸法入り込んだ凹部状に形成されており、この大開口穴５８Ａの底面部に小開口穴５８Ｂが形成されている。小開口穴５８Ｂは９箇所に設けられ、大開口穴５８Ａの底面部からマンドレル部５３の下流側に向けて穴あけ形成されている。 The large opening hole 58A has substantially the same shape as the large opening hole 48A of the extrusion die 14 of the fifth embodiment, that is, a concave shape that has a substantially square shape in plan view and enters a predetermined dimension on the lower side of the mandrel portion 53. The small opening hole 58B is formed in the bottom face part of this large opening hole 58A. The small opening holes 58B are provided at nine locations, and are formed from the bottom surface portion of the large opening hole 58A toward the downstream side of the mandrel portion 53.
　そして、これらの小開口穴５８Ｂは、断面格子状の中空形材３を構成する９箇所の交差部Ｘに対応できるようになっており、これらの交差部Ｘを形成できるように、１６個の内側成形用駒５３Ｂがマンドレル５３の下部に設けられている。ここで、１６個の内側成形用駒５３Ｂにおける各フランジ部５３Ｆのそれぞれの１角部が集まる９箇所の部位で、それぞれの交点Ｐの位置が、上記交差部Ｘに対応するようになっており、さらに、上記９箇所の交点Ｐの位置と９個のビレットガイド穴５８の各小開口穴部５８Ｂの中心とが一致するように、小開口穴部５８Ｂの位置が設定されている。 And these small opening holes 58B can respond | correspond to nine intersections X which comprise the cross-sectional lattice-shaped hollow shape member 3, and 16 intersections X can be formed so that these intersections X can be formed. An inner molding piece 53 </ b> B is provided below the mandrel 53. Here, the positions of the respective intersections P correspond to the intersections X in nine portions where the respective corners of the flanges 53F of the 16 inner molding pieces 53B are gathered. Further, the positions of the small opening holes 58B are set so that the positions of the nine intersection points P and the centers of the small opening holes 58B of the nine billet guide holes 58 coincide with each other.
　大開口穴５８Ａの底面部には９個の小開口穴５８Ｂが設けられているため、大開口穴５８Ａは、第５実施形態の大開口穴４８Ａよりも平面形状が大きく形成されている。また、各内側成形用駒５３Ｂの大きさは、前記第５実施形態の押出しダイス１４の各内側成形用駒４３Ｂの大きさと略同じ大きさとなっているので、押出しダイス１５のマンドレル５３の大きさが第５実施形態の押出しダイス１４のマンドレル４３の大きさより大きく形成されている。
　そのため、１６個の内側成形用駒５３Ｂを収容するメス型１３０の外側成形用ダイス穴１３０Ｂの大きさが、第５実施形態の押出しダイス１４の外側成形用ダイス穴部３０Ｂの大きさより大きく形成されている。 Since nine small opening holes 58B are provided in the bottom surface portion of the large opening hole 58A, the large opening hole 58A is formed to have a larger planar shape than the large opening hole 48A of the fifth embodiment. Further, since the size of each inner forming piece 53B is substantially the same as the size of each inner forming piece 43B of the extrusion die 14 of the fifth embodiment, the size of the mandrel 53 of the extrusion die 15 is the same. Is larger than the size of the mandrel 43 of the extrusion die 14 of the fifth embodiment.
Therefore, the size of the outer forming die hole 130B of the female die 130 that accommodates the 16 inner forming pieces 53B is formed larger than the size of the outer forming die hole 30B of the extrusion die 14 of the fifth embodiment. ing.
　１６個の内側成形用駒５３Ｂは、図１９に示すように、それぞれが四角形状の同一形状となっていると共に、全体で四角形状になるように配置されている。そして、各内側成形用駒５３Ｂ間の隙間Ｌ２により、前記形材成形用内側穴５１が構成されている。
　また、四角形状に配置された１６個の内側成形用駒５３Ｂは、メス型１３０の外側成形ダイス穴１３０Ｂ内に挿入されるようになっている。 As shown in FIG. 19, the 16 inner molding pieces 53B have the same quadrangular shape, and are arranged so as to be square as a whole. The shape forming inner hole 51 is constituted by the gap L2 between the inner forming pieces 53B.
Also, the 16 inner molding pieces 53B arranged in a square shape are inserted into the outer molding die holes 130B of the female mold 130.
　次に、以上のような第６実施形態の押出ダイス１６により成形される中空形材３を、図２０に基づいて説明する。
　中空形材３は、断面四角形形状に形成され、互いに対向配置された二対の外周壁３ａ，３ａと、その内部に設けられた縦横３本づつの仕切壁３ｂ，３ｂとで構成され、内部に１６箇所の空間３Ｓを有する断面格子状となっている。そして、仕切壁３ｂ，３ｂが交差する交差部Ｘが９箇所に設けられている。
　なお、縦横３本づつの仕切壁３ｂ，３ｂの板厚寸法は同じ寸法に形成されている。 Next, the hollow shape member 3 formed by the extrusion die 16 of the sixth embodiment as described above will be described with reference to FIG.
The hollow shape member 3 is formed of a pair of outer peripheral walls 3a and 3a that are formed in a quadrangular cross-section and are arranged to face each other, and three vertical and horizontal partition walls 3b and 3b provided in the interior. It has a cross-sectional lattice shape having 16 spaces 3S. And the crossing part X where the partition walls 3b and 3b cross is provided in nine places.
In addition, the plate | board thickness dimension of the partition walls 3b and 3b of every three length and width is formed in the same dimension.
　このような第６実施形態の押出ダイス１５でも、前記第５実施形態の押出ダイス１４と略同様の作用と、前記（１）、（２）、（７）、（８）と略同様の効果を得ることができる他、次のような効果を得ることができる。
（１０）上流側から送られてきたビレットＢの一部が、マンドレル部５３の中央領域に設けられたビレットガイド穴５８の大開口穴５８Ａから小開口穴５８Ｂを経て、１６個の内側成形用駒５３Ｂにおける各フランジ部５３Ｆのそれぞれの１角部が集まる９箇所の交点Ｐに向かって押し出される。それぞれの交点Ｐの位置は、仕切り壁によって形成される９箇所の交差部Ｘに対応しており、さらに、各交点Ｐと各ビレットガイド穴５８の小開口穴部５８Ｂの中心とはそれぞれ同一線上に一致しているので、各小開口穴部５８Ｂを経由したビレットＢは各交点Ｐを経由して押出される。そのため、９つの交差部Ｘを有する断面格子状の中空形材３を容易に成形することができる。 In the extrusion die 15 of the sixth embodiment as described above, substantially the same operation as the extrusion die 14 of the fifth embodiment and substantially the same effect as the above (1), (2), (7), and (8). The following effects can be obtained.
(10) A part of the billet B sent from the upstream side passes through the large opening hole 58A of the billet guide hole 58 provided in the central region of the mandrel part 53, and passes through the small opening hole 58B, and is used for 16 inner moldings. The frame 53B is pushed toward nine intersections P where the respective corners of the flanges 53F gather. The position of each intersection P corresponds to nine intersections X formed by the partition walls, and each intersection P and the center of the small opening hole 58B of each billet guide hole 58 are on the same line. Therefore, the billet B passing through each small opening hole 58B is pushed out via each intersection P. Therefore, it is possible to easily form the hollow shape member 3 having a cross-sectional lattice shape having nine intersecting portions X.
　次に、図２１～２４を参照して、本発明の押出ダイスの第７実施形態を説明する。
　本第７実施形態の押出ダイス１６は、そのビレットガイド穴６８の構成を、前記第６実施形態の押出ダイス１５におけるビレットガイド穴５８の構成と異なるものとした。しかし、その他の部材、構造等は、第６実施形態の押出ダイス１５と全く同一である。したがって、第６実施形態と同一構造、同一部材には同一符号を付して、異なる部分のみを説明する。 Next, a seventh embodiment of the extrusion die of the present invention will be described with reference to FIGS.
In the extrusion die 16 of the seventh embodiment, the configuration of the billet guide hole 68 is different from the configuration of the billet guide hole 58 in the extrusion die 15 of the sixth embodiment. However, other members, structures, etc. are exactly the same as the extrusion die 15 of the sixth embodiment. Therefore, the same structure and the same members as those of the sixth embodiment are denoted by the same reference numerals, and only different portions will be described.
　押出ダイス１６の前記オス型部材１２０は、中空形材３の内側形状を成形するマンドレル部６３と、このマンドレル部６３を支持すると共に当該マンドレル部６３の周囲から外方に略Ｘ字状に突出したブリッジ部６４とで構成されたスパイダー６２を備え、このスパイダー６２は、上記ブリッジ部６４を介して前記ホルダー部１２５と一体的に連結されている。 The male member 120 of the extrusion die 16 supports a mandrel portion 63 that molds the inner shape of the hollow shape member 3, and supports the mandrel portion 63 and protrudes outward from the periphery of the mandrel portion 63 in a substantially X shape. The spider 62 includes a bridge portion 64, and the spider 62 is integrally connected to the holder portion 125 via the bridge portion 64.
　また、各ブリッジ６４ａ～６４ｄの先端外周面６４Ａとホルダー１２５の内周面とは、前記ブリッジ部焼き嵌め構造Ｎにより一体的に固定されており、各ブリッジ６４ａ～６４ｄおよびマンドレル部６３の強度が確保されている。 Further, the outer peripheral surface 64A of each bridge 64a to 64d and the inner peripheral surface of the holder 125 are integrally fixed by the bridge portion shrinkage fitting structure N, and the strength of each bridge 64a to 64d and the mandrel portion 63 is increased. It is secured.
　上記ブリッジ部６４は、図２１中、時計回りに配置された第１ブリッジ６４ａ、第２ブリッジ６４ｂ、第３ブリッジ６４ｃ、および第４ブリッジ６４ｄの４個で構成されている。そして、各ブリッジ６４ａ～６４ｄ間の空間がビレット導入空間Ｓとなっている。 In FIG. 21, the bridge portion 64 is composed of four pieces, a first bridge 64a, a second bridge 64b, a third bridge 64c, and a fourth bridge 64d, which are arranged clockwise. A space between the bridges 64a to 64d is a billet introduction space S.
　本第７実施形態の押出ダイス１６では、図２４に示すような、断面格子状の中空形材　４を成形することができるように構成されている。そして、この中空形材４では、厚さ寸法が異なる仕切り壁により形成された９箇所の交差部Ｘを有するものであり、ビレットガイド穴６８は、これらの交差部Ｘに対応できるように構成されている。 The extrusion die 16 of the seventh embodiment is configured to be able to form a hollow section 4 having a cross-sectional lattice shape as shown in FIG. The hollow shape member 4 has nine intersecting portions X formed by partition walls having different thickness dimensions, and the billet guide hole 68 is configured to correspond to these intersecting portions X. ing.
　すなわち、ビレットガイド穴６８は、マンドレル部６３の上部側に設けられた大開口穴６８Ａと、マンドレル部６３の下部側に、上記９箇所の交差部Ｘにそれぞれ対応して形成された９個の小開口穴６８Ｂとで構成されている。上記大開口穴６８Ａは、前記第６実施形態の押出ダイス１５におけるビレットガイド穴５８の大開口穴５８Ａと略同様の形状に形成されている。
　また、小開口穴６８Ｂは、大開口穴６８Ａの底面部から交差部Ｘ側、つまりメス型部材１３０側に向けて穴あけ形成されている。 In other words, the billet guide hole 68 has nine large openings 68A provided on the upper side of the mandrel portion 63 and nine lower portions on the lower side of the mandrel portion 63 corresponding to the nine intersections X. It consists of a small opening hole 68B. The large opening hole 68A is formed in a shape substantially the same as the large opening hole 58A of the billet guide hole 58 in the extrusion die 15 of the sixth embodiment.
The small opening hole 68B is formed from the bottom surface portion of the large opening hole 68A toward the intersecting portion X side, that is, toward the female member 130 side.
　小開口穴６８Ｂは、図２１，２３に示すように、開口面積が異なる３種類で構成されている。
　すなわち、縦横に３個づつ均等配置された小開口穴６８Ｂのうち、中央部に開口面積が最も大きな１個の第１の小開口穴６８Ｂ１が設けられ、この第１の小開口穴６８Ｂ１に対して十文字状の線上、かつ両隣に開口面積が第１の小開口穴６８Ｂ１の次に大きな第２の小開口穴６８Ｂ２が設けられている。 As shown in FIGS. 21 and 23, the small opening hole 68B includes three types having different opening areas.
That is, one small opening hole 68B1 having the largest opening area is provided in the central portion among the small opening holes 68B that are equally arranged three by three in the vertical and horizontal directions, with respect to the first small opening hole 68B1. A second small opening hole 68B2 having a large opening area next to the first small opening hole 68B1 is provided on both sides of the cross-shaped line.
　また、第２の小開口穴６８Ｂ２の上記十文字状の線上と平行な線上で、当該第２の小開口穴６８Ｂ２の外側にそれぞれ１個づつが、その第２の小開口穴６８Ｂ２の開口面積よりも小さな開口面積の第３の小開口穴６８Ｂ３が設けられている。つまり、この第３の小開口穴６８Ｂ３は、大開口穴６８Ａの底面部の四隅に配置されていることになる。 In addition, one on the outer side of the second small opening hole 68B2 on the line parallel to the cross-shaped line of the second small opening hole 68B2, respectively, from the opening area of the second small opening hole 68B2 A third small opening hole 68B3 having a small opening area is also provided. That is, the third small opening hole 68B3 is disposed at the four corners of the bottom surface portion of the large opening hole 68A.
　そして、これらの小開口穴６８Ｂは、断面格子状の中空形材４を構成する９箇所の交差部Ｘに対応できるようになっており、これらの交差部Ｘを形成できるように、１６個の内側成形用駒６３Ｂがマンドレル６３の下部に設けられている。
　ここで、１６個の内側成形用駒６３Ｂにおける各フランジ部６３Ｆのそれぞれの１角部が集まる９箇所の部位で、それぞれの交点Ｐの位置が、上記交差部Ｘ１，Ｘ２，Ｘ３にそれぞれ対応するようになっており、さらに、上記９箇所の交点Ｐの位置と９個のビレットガイド穴６８の各小開口穴部６８Ｂ１，６８Ｂ２，６８Ｂ３のそれぞれの中心とが一致するように、各小開口穴部６８Ｂ１，６８Ｂ２，６８Ｂ３の位置が設定されている。
　また、各内側成形用駒６３Ｂの大きさは、前記第６実施形態の押出しダイス１５の各内側成形用駒５３Ｂの大きさと略同じ大きさとなっている。 And these small opening holes 68B can respond | correspond to nine crossing parts X which comprise the cross-section lattice-shaped hollow shape member 4, and 16 cross-sections X can be formed so that these crossing parts X can be formed. An inner molding piece 63 </ b> B is provided below the mandrel 63.
Here, the positions of the intersections P correspond to the intersections X1, X2, and X3 at nine portions where the respective corner portions of the flange portions 63F of the 16 inner molding pieces 63B gather. Further, the small opening holes are arranged so that the positions of the nine intersection points P and the centers of the small opening hole portions 68B1, 68B2, 68B3 of the nine billet guide holes 68 coincide with each other. The positions of the parts 68B1, 68B2, and 68B3 are set.
The size of each inner forming piece 63B is substantially the same as the size of each inner forming piece 53B of the extrusion die 15 of the sixth embodiment.
　１６個の内側成形用駒６３Ｂは、図２３に示すように、それぞれが四角形状の同一形状となっており、それら全体が四角形状に均等配置されている。
　ここで、各内側成形用駒６３Ｂの配置は、それぞれの間隔が異なるように配置されている。すなわち、１６個の内側成形用駒６３Ｂは、４個づつが十文字状の隙間Ｌ３を挟んで配置されており、それらの４個づつの内側成形用駒６３Ｂが十文字状の隙間Ｌ４を挟んで配置されている。 As shown in FIG. 23, the sixteen inner molding pieces 63B each have the same rectangular shape, and all of them are equally arranged in a rectangular shape.
Here, the inner molding pieces 63B are arranged so that the intervals are different. That is, the 16 inner molding pieces 63B are arranged with four cross-shaped gaps L3 being interposed between the four inner molding pieces 63B, and the four inner molding pieces 63B are arranged with the cross-shaped gaps L4 being sandwiched therebetween. Has been.
　１６個の内側成形用駒６３Ｂのうち、最外側の１２個の内側成形用駒６３Ｂの側面は、前記メス型部材１３０に形成されている外側成形用ダイス１３０Ｂと隙間Ｌ１をあけて対向している。
　ここで、前記隙間Ｌ４の隙間間隔は、隙間Ｌ３の隙間間隔よりも大きい幅厚隙間間隔とされており、隙間Ｌ１は、隙間Ｌ４と隙間Ｌ３との中間の隙間間隔に設定されている。そして、上記隙間Ｌ３により形材成形用内側穴５２が構成され、隙間Ｌ４により形材成形用内側穴５３が構成され、また、隙間Ｌ１により前記形材成形用外側穴５０が構成されている。
　また、これら１６個の内側成形用駒６３Ｂは、メス型１３０の外側成形ダイス穴１３０Ｂ内に挿入されるようになっている。 Of the 16 inner molding pieces 63B, the side surfaces of the outermost twelve inner molding pieces 63B face the outer molding dies 130B formed on the female mold member 130 with a gap L1 therebetween. Yes.
Here, the gap interval of the gap L4 is a width-thickness gap interval larger than the gap interval of the gap L3, and the gap L1 is set to an intermediate gap interval between the gap L4 and the gap L3. Then, the shape forming inner hole 52 is constituted by the gap L3, the shape forming inner hole 53 is constituted by the gap L4, and the shape forming outer hole 50 is constituted by the gap L1.
These 16 inner molding pieces 63B are inserted into the outer molding die holes 130B of the female mold 130.
　次に、図２４に基づいて、以上のような第７実施形態の押出ダイス１６により成形される中空形材４を説明する。
　中空形材４は断面格子状に成形されており、断面四角筒状の外周壁４ａ，４ａと、この外周壁４ａ，４ａに連続する十文字状の第１仕切り壁４ｂ１，４ｂ１と、この第１仕切り壁４ｂ１，４ｂ１の長さ方向中央部に設けられた十文字状の第２仕切り壁４ｂ２，４ｂ２とで構成されている。 Next, based on FIG. 24, the hollow shape member 4 formed by the extrusion die 16 of the seventh embodiment as described above will be described.
The hollow shape member 4 is formed in a cross-sectional lattice shape, and includes outer peripheral walls 4a and 4a having a rectangular cross-sectional shape, first cross-shaped first partition walls 4b1 and 4b1 continuous to the outer peripheral walls 4a and 4a, and the first The partition walls 4b1 and 4b1 are configured by cross-shaped second partition walls 4b2 and 4b2 provided at the center in the length direction.
　そして、第１仕切り壁４ｂ１，４ｂ１は、第２仕切り壁４ｂ２，４ｂ２に比べて板厚が厚く形成されている。
　また、第１仕切り壁４ｂ１，４ｂ１同士が交差する部位は最も肉厚の交差部Ｘ１となっており、第１仕切り壁４ｂ１と第２仕切り壁４ｂ２とが交差する部位は次に肉厚の交差部Ｘ２となっている。また、第２仕切り壁４ｂ２，４ｂ２同士が交差する部位は最も薄肉の交差部Ｘ３となっている。 The first partition walls 4b1 and 4b1 are formed thicker than the second partition walls 4b2 and 4b2.
Further, the portion where the first partition walls 4b1 and 4b1 intersect is the thickest intersection portion X1, and the portion where the first partition wall 4b1 and the second partition wall 4b2 intersect is the next thickest intersection. Part X2. Further, the portion where the second partition walls 4b2 and 4b2 intersect with each other is the thinnest intersection portion X3.
　図２１，２３に示すように、最も肉厚の交差部Ｘ１には前記第１の小開口穴６８Ｂ１が対応し、次に肉厚の交差部Ｘ２には前記第２の小開口穴６８Ｂ２が対応し、また、最も薄肉の交差部Ｘ３には、前記第３の小開口穴６８Ｂ３が対応するようになっている。
　その結果、各小開口穴６８Ｂ１，６８Ｂ２，６８Ｂ３の径を変更することで任意の肉厚の交差部形成に対応できる。 As shown in FIGS. 21 and 23, the thickest intersection X1 corresponds to the first small opening hole 68B1, and then the thickest intersection X2 corresponds to the second small opening hole 68B2. In addition, the third small opening hole 68B3 corresponds to the thinnest crossing portion X3.
As a result, by changing the diameter of each small opening hole 68B1, 68B2, 68B3, it is possible to cope with the formation of an intersecting portion having an arbitrary thickness.
　このような第７実施形態の押出ダイス１６でも、前記第６実施形態の押出ダイス１５と略同様の作用と、前記（１）、（２）、（６）、（７）、（９）と略同様の効果を得ることができる他、次のような効果を得ることができる。
（１０）ビレットガイド穴６８の大開口穴６８Ａから小開口穴６８Ｂは、穴径が異なる第１の小開口穴６８Ｂ１、第２の小開口穴６８Ｂ２および第３の小開口穴６８Ｂ３の３種類で構成され、それぞれが、板厚が異なる第１仕切り壁４ｂ１，４ｂ１同士が交差する部位は交差部Ｘ１、第１仕切り壁４ｂ１と第２仕切り壁４ｂ２とが交差する交差部Ｘ２、第２仕切り壁４ｂ２，４ｂ２同士が交差する交差部Ｘ３に対応している。そのため、板厚が異なる仕切り壁を有する断面格子状の中空形材４を容易に成形することができる。 Also in the extrusion die 16 of the seventh embodiment, substantially the same operation as the extrusion die 15 of the sixth embodiment, and (1), (2), (6), (7), (9) In addition to obtaining substantially the same effects, the following effects can be obtained.
(10) The large opening hole 68A to the small opening hole 68B of the billet guide hole 68 are three kinds of first small opening hole 68B1, second small opening hole 68B2 and third small opening hole 68B3 having different hole diameters. The portions where the first partition walls 4b1 and 4b1 that are configured and have different plate thicknesses intersect each other are the intersection X1, the intersection X2 where the first partition wall 4b1 and the second partition wall 4b2 intersect, and the second partition wall. This corresponds to the intersection X3 where 4b2 and 4b2 intersect. Therefore, the cross-sectional lattice-shaped hollow shape member 4 having partition walls having different plate thicknesses can be easily formed.
　次に、図２５，２６に基づいて本願発明の押出しダイスの第８～１０実施形態を説明する。
　前記第１～７実施形態では、各押出しダイス１０～１６により成形される中空形材１～６が、仕切り壁１ｂ等で形成された交差部Ｘを有する複雑形状の断面を有するものであったが、これに限らない。本願発明の第８～１０実施形態の押出しダイス１７～１９では、前記内側成形用駒の形状を変えることで、それぞれ、図２５（Ａ），（Ｂ）、および図２６に示すように、内部に曲線形状の仕切り壁７ｂ，８ｂ，９ｂを有する中空形材７，８，９を成形することができる。 Next, eighth to tenth embodiments of the extrusion die of the present invention will be described with reference to FIGS.
In the first to seventh embodiments, the hollow shapes 1 to 6 formed by the extrusion dies 10 to 16 have a complicated cross section having an intersection X formed by the partition wall 1b and the like. However, it is not limited to this. In the extrusion dies 17 to 19 of the eighth to tenth embodiments of the present invention, by changing the shape of the inner molding piece, as shown in FIGS. 25 (A), (B) and FIG. Hollow profiles 7, 8, 9 having curved partition walls 7b, 8b, 9b can be formed.
　すなわち、前記第８実施形態の押出しダイス１７により成形される中空形材７は、図２５（Ａ）に示すように、断面四角形形状の外周壁７ａ，７ａと、これらの外周壁７ａ，７ａの内部に設けられた曲線状の仕切壁７ｂ，７ｂとで構成されている。これらの仕切壁７ｂ，７ｂは、それぞれ、直交する外周壁７ａ，７ａの長さ方向中央部同士を曲線状に結ぶように形成されている。 That is, as shown in FIG. 25 (A), the hollow member 7 formed by the extrusion die 17 of the eighth embodiment includes outer peripheral walls 7a and 7a having a quadrangular cross section and the outer peripheral walls 7a and 7a. It is comprised by the curved partition walls 7b and 7b provided in the inside. These partition walls 7b and 7b are formed so as to connect the central portions in the length direction of the outer peripheral walls 7a and 7a orthogonal to each other in a curved shape.
　上記仕切壁７ｂ，７ｂを形成するために、１個の内側成形用駒７３Ｂ１と、この内側成形用駒７３Ｂ１を挟んで配置された２個の内側成形用駒７３Ｂ２とで構成されている。これらの内側成形用駒７３Ｂ１との内側成形用駒７３Ｂ２とは、前記メス型部材３０に形成された前記外側成形用ダイス穴部３０Ｂ内に挿入されるようになっている。 In order to form the partition walls 7b and 7b, the partition wall 7b is composed of one inner molding piece 73B1 and two inner molding pieces 73B2 arranged with the inner molding piece 73B1 interposed therebetween. The inner molding piece 73B1 and the inner molding piece 73B2 are inserted into the outer molding die hole 30B formed in the female member 30.
　ここで、各内側成形用駒７３Ｂ１および内側成形用駒７３Ｂ２と外側成形用ダイス穴部３０Ｂとの間には、前記隙間Ｌ１の前記形材成形用外側穴部５０が形成され、また、仕切壁７ｂ，７ｂの厚さ寸法は前記隙間Ｌ２となるように設定され、この隙間Ｌ２により前記形材成形用内側穴部５１が形成されている。
　仕切壁７ｂ，７ｂ同士の湾曲部が最も接近した部位には、ビレットガイド穴７８の小開口部７８Ｂ，７８Ｂが対向配置されており、これらの小開口部７８Ｂ，７８Ｂには、ビレットガイド穴７８の大開口穴部２８Ａが連結されている。
　なお、ビレットガイド穴７８は図示しないマンドレルの中央部に設けられている。また、押出しダイス１７の全体構成は、前記第１実施形態の押出しダイス１０等の全体構成と略同一である。 Here, between the inner molding pieces 73B1 and the inner molding pieces 73B2 and the outer molding die hole 30B, the shape molding outer hole 50 of the gap L1 is formed, and a partition wall The thickness dimension of 7b, 7b is set so that it may become the said clearance gap L2, and the said shape forming inner side hole part 51 is formed by this clearance gap L2.
The small opening portions 78B and 78B of the billet guide hole 78 are opposed to the portion where the curved portions of the partition walls 7b and 7b are closest to each other, and the billet guide hole 78 is disposed in the small opening portions 78B and 78B. The large opening hole 28A is connected.
The billet guide hole 78 is provided at the center of a mandrel (not shown). The overall configuration of the extrusion die 17 is substantially the same as the overall configuration of the extrusion die 10 and the like of the first embodiment.
　以上のような構成では、上流側からビレットが送り込まれ、その一部がビレットガイド穴７８の大開口穴部７８Ａに導入され、かつ小開口部７８Ｂ，７８Ｂを経由して内側成形用駒７３Ｂ１および内側成形用駒７３Ｂ２の隙間から押し出される。この際、小開口部７８Ｂ，７８Ｂに導入されたビレットは、形材成形用内側穴部５１から押し出されるので、曲線状の仕切壁７ｂ，７ｂを容易に形成できる。 In the configuration as described above, the billet is fed from the upstream side, a part of which is introduced into the large opening hole portion 78A of the billet guide hole 78, and the inner forming piece 73B1 and the small opening portions 78B and 78B and It is pushed out from the gap between the inner molding pieces 73B2. At this time, since the billet introduced into the small openings 78B and 78B is pushed out from the shape forming inner hole 51, the curved partition walls 7b and 7b can be easily formed.
　次に、前記第９実施形態の押出しダイス１８を説明する。
　この押出しダイス１８により成形される中空形材８は、図２５（Ｂ）に示すように、断面四角形形状の外周壁８ａ，８ａと、これらの外周壁８ａ，８ａの内部に設けられた曲線状の仕切壁８ｂ，８ｂとで構成されている。これらの仕切壁８ｂ，８ｂは、それぞれ、対向する外周壁８ａ，８ａから中空形材８の断面中心部側に突出した曲線状に形成されている。 Next, the extrusion die 18 of the ninth embodiment will be described.
As shown in FIG. 25 (B), the hollow member 8 formed by the extrusion die 18 has outer peripheral walls 8a and 8a having a quadrangular cross section, and a curved shape provided inside these outer peripheral walls 8a and 8a. Partition walls 8b and 8b. These partition walls 8b and 8b are formed in curved shapes protruding from the outer peripheral walls 8a and 8a facing each other toward the center of the cross section of the hollow shape member 8, respectively.
　上記仕切壁８ｂ，８ｂを形成するために、１個の内側成形用駒８３Ｂ１と、この内側成形用駒８３Ｂ１を挟んで配置された２個の内側成形用駒８３Ｂ２とで構成されている。これらの内側成形用駒８３Ｂ１との内側成形用駒８３Ｂ２とは、前記メス型部材３０に形成された前記外側成形用ダイス穴部３０Ｂ内に挿入されるようになっている。 In order to form the partition walls 8b and 8b, the partition wall 8b is composed of one inner molding piece 83B1 and two inner molding pieces 83B2 arranged so as to sandwich the inner molding piece 83B1. The inner molding piece 83B1 and the inner molding piece 83B2 are inserted into the outer molding die hole 30B formed in the female member 30.
　ここで、各内側成形用駒８３Ｂ１および内側成形用駒８３Ｂ２と外側成形用ダイス穴部３０Ｂとの間には、前記隙間Ｌ１の前記形材成形用外側穴部５０が形成され、また、仕切壁８ｂ，８ｂの厚さ寸法は前記隙間Ｌ２となるように設定され、この隙間Ｌ２により前記形材成形用内側穴部５１が形成されている。
　また、仕切壁８ｂ，８ｂ同士の湾曲部が最も接近した部位には、ビレットガイド穴８８の小開口部８８Ｂ，８８Ｂが対向配置されており、これらの小開口部８８Ｂ，８８Ｂには、ビレットガイド穴８８の大開口穴部８８Ａが連結されている。
　なお、ビレットガイド穴８８は図示しないマンドレルの中央部に設けられている。また、押出しダイス１８の全体構成は、前記第１実施形態の押出しダイス１０等の全体構成と略同一である。 Here, between the inner molding pieces 83B1 and the inner molding pieces 83B2 and the outer molding die hole 30B, the shape molding outer hole 50 of the gap L1 is formed, and a partition wall The thickness dimension of 8b, 8b is set to be the gap L2, and the shape forming inner hole 51 is formed by the gap L2.
Further, the small opening portions 88B and 88B of the billet guide hole 88 are arranged to face each other at the portion where the curved portions between the partition walls 8b and 8b are closest, and the billet guide is disposed in the small opening portions 88B and 88B. The large opening hole 88A of the hole 88 is connected.
The billet guide hole 88 is provided at the center of a mandrel (not shown). The overall configuration of the extrusion die 18 is substantially the same as the overall configuration of the extrusion die 10 and the like of the first embodiment.
　以上のような構成では、上流側からビレットが送り込まれ、その一部がビレットガイド穴８８の大開口穴部８８Ａに導入され、かつ小開口部８８Ｂ，８８Ｂを経由して内側成形用駒８３Ｂ１および内側成形用駒８３Ｂ２の隙間から押し出される。
　この際、小開口部８８Ｂ，８８Ｂに導入されたビレットは、形材成形用内側穴部５１から押し出されるので、曲線状の仕切壁８ｂ，８ｂを容易に形成できる。 In the configuration as described above, the billet is fed from the upstream side, a part of the billet is introduced into the large opening hole portion 88A of the billet guide hole 88, and the inner forming piece 83B1 and the small opening portions 88B and 88B and It is pushed out from the gap between the inner molding pieces 83B2.
At this time, since the billet introduced into the small openings 88B and 88B is pushed out from the shape forming inner hole 51, the curved partition walls 8b and 8b can be easily formed.
　次に、前記第１０実施形態の押出しダイス１９を説明する。
　この押出しダイス１９により成形される中空形材９は、図２６に示すように、断面四角形形状の外周壁９ａ，９ａと、これらの外周壁９ａ，９ａの内部に設けられた波型形状の仕切壁９ｂ，９ｂとで構成されている。これらの仕切壁９ｂ，９ｂは、それぞれ、対向する外周壁９ａ，９ａ同士を結んだ波型形状に形成されている。 Next, the extrusion die 19 of the tenth embodiment will be described.
As shown in FIG. 26, the hollow member 9 formed by the extrusion die 19 includes outer peripheral walls 9a and 9a having a square cross section and corrugated partitions provided inside these outer peripheral walls 9a and 9a. It consists of walls 9b and 9b. These partition walls 9b and 9b are each formed in a corrugated shape connecting the outer peripheral walls 9a and 9a facing each other.
　上記仕切壁９ｂ，９ｂを形成するために、１個の内側成形用駒９３Ｂ１と、この内側成形用駒９３Ｂ１を挟んで配置された２個の内側成形用駒９３Ｂ２とで構成されている。これらの内側成形用駒９３Ｂ１との内側成形用駒９３Ｂ２とは、前記メス型部材３０に形成された前記外側成形用ダイス穴部３０Ｂ内に挿入されるようになっている。 In order to form the partition walls 9b and 9b, the partition wall 9b is constituted by one inner molding piece 93B1 and two inner molding pieces 93B2 arranged with the inner molding piece 93B1 interposed therebetween. The inner molding piece 93B2 and the inner molding piece 93B2 are inserted into the outer molding die hole 30B formed in the female member 30.
　ここで、各内側成形用駒９３Ｂ１および内側成形用駒９３Ｂ２と外側成形用ダイス穴部３０Ｂとの間には、前記隙間Ｌ１の前記形材成形用外側穴部５０が形成され、また、仕切壁９ｂ，９ｂの厚さ寸法は前記隙間Ｌ２となるように設定され、この隙間Ｌ２により前記形材成形用内側穴部５１が形成されている。
　さらに、仕切壁９ｂ，９ｂのそれぞれの長さ方向略中央部には、ビレットガイド穴９８の小開口部９８Ｂ，９８Ｂが対向配置されており、これらの小開口部９８Ｂ，９８Ｂには、ビレットガイド穴９８の大開口穴部９８Ａが連結されている。
　なお、ビレットガイド穴９８は図示しないマンドレルの中央部に設けられている。また、押出しダイス１９の全体構成は、前記第１実施形態の押出しダイス１０等の全体構成と略同一である。 Here, between the inner molding pieces 93B1 and the inner molding pieces 93B2 and the outer molding die hole 30B, the shape molding outer hole 50 of the gap L1 is formed, and a partition wall The thickness dimension of 9b, 9b is set to be the gap L2, and the shape forming inner hole 51 is formed by the gap L2.
Furthermore, small openings 98B and 98B of billet guide holes 98 are arranged oppositely to each central portion of the partition walls 9b and 9b in the longitudinal direction, and the billet guides are disposed in the small openings 98B and 98B. The large opening hole 98A of the hole 98 is connected.
The billet guide hole 98 is provided at the center of a mandrel (not shown). The overall configuration of the extrusion die 19 is substantially the same as the overall configuration of the extrusion die 10 and the like of the first embodiment.
　以上のような構成では、上流側からビレットが送り込まれ、その一部がビレットガイド穴９８の大開口穴部９８Ａに導入され、かつ小開口部９８Ｂ，９８Ｂを経由して内側成形用駒９３Ｂ１および内側成形用駒９３Ｂ２の隙間から押し出される。
　この際、小開口部９８Ｂ，９８Ｂに導入されたビレットは、形材成形用内側穴部５１から押し出されるので、曲線状の仕切壁９ｂ，９ｂを容易に形成できる。 In the configuration as described above, the billet is fed from the upstream side, a part of which is introduced into the large opening hole portion 98A of the billet guide hole 98, and the inner forming piece 93B1 and the small opening portions 98B and 98B and It is pushed out from the gap between the inner molding pieces 93B2.
At this time, since the billet introduced into the small openings 98B and 98B is pushed out from the shape forming inner hole 51, the curved partition walls 9b and 9b can be easily formed.
　以上、前記実施形態を参照して本願発明を説明したが、本願発明は前記実施形態に限定されるものではない。本願発明の構成や詳細については、当業者が理解し得るさまざまな変更を加えることができる。また、本願発明には、上記各実施形態の構成の一部又は全部を相互に適宜組み合わせたものも含まれる。 As mentioned above, although this invention was demonstrated with reference to the said embodiment, this invention is not limited to the said embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention. Further, the invention of the present application includes a combination of part or all of the configurations of the above-described embodiments as appropriate.
　例えば、前記第５実施形態では、押出ダイス１４のビレットガイド穴４８の大開口穴部４８Ａが、平面形状が略正方形形状で下流側に窪んだ凹状に形成されていたものを、図２７に示すように、本変形形態の押出ダイス１４Ａでは、大開口穴７８Ａをマンドレル部４３の上面から大開口穴部７８Ａの底面に行くにしたがって狭まる形状のテーパー状穴で構成したものである。 For example, in the fifth embodiment, the large opening hole portion 48A of the billet guide hole 48 of the extrusion die 14 is formed in a concave shape recessed in the downstream side in a substantially square shape as shown in FIG. As described above, in the extrusion die 14A of this modification, the large opening hole 78A is configured by a tapered hole that narrows from the upper surface of the mandrel portion 43 toward the bottom surface of the large opening hole portion 78A.
　また、前記第６，７実施形態のビレットガイド穴５８，６８の大開口穴部５８Ａ，６８Ａも、上記と同様にマンドレル部５３，６３の上面から大開口穴部５８Ａ，６８Ａの底面に行くにしたがって狭まる形状のテーパー状穴に構成してもよい。 Further, the large opening holes 58A and 68A of the billet guide holes 58 and 68 of the sixth and seventh embodiments also go from the upper surface of the mandrel parts 53 and 63 to the bottom surfaces of the large opening holes 58A and 68A in the same manner as described above. Therefore, it may be configured as a tapered hole with a narrowing shape.
　さらに、前記第１，３実施形態では、ビレットガイド穴２８を、大開口穴部２８Ａと小開口穴部２８Ｂとの二段構成とし、大開口穴部２８Ａの底面部は平坦面に形成されているが、これに限らない。大開口穴部２８Ａの底面部を、例えば４５度の傾斜面を有する角部からなる底面部としてもよい。このようにすると、ビレットＢの流れがよりスムーズとなる。 Furthermore, in the first and third embodiments, the billet guide hole 28 has a two-stage configuration of the large opening hole 28A and the small opening hole 28B, and the bottom surface of the large opening hole 28A is formed on a flat surface. However, it is not limited to this. The bottom surface portion of the large opening hole portion 28A may be a bottom surface portion formed of a corner portion having an inclined surface of 45 degrees, for example. In this way, the billet B flows more smoothly.
　さらに、前記第１～４実施形態では、各押出しダイス１０～１３が、断面田の字形状の中空形材１を成形できるようになっており、第５～７実施形態では、各押出しダイス１４～１６が、断面格子形状の中空形材２～４をそれぞれ成形できるようになっているが、これに限らない。複数個の内側成形用駒の形状を変えることにより、例えば、図２８（Ａ）に示すように、外周壁５ａ，５ａに縦２本、横１本の仕切り壁５ｂ，５ｂで横方向に２箇所の交差部Ｘが形成された中空形材５を成形できるように構成してもよい。
　また、図２８（Ｂ）に示すように、複数個の内側成形用駒の形状を変えることにより、四角筒状に形成された外周壁６ａ，６ａの４つの角部同士に、仕切り壁６ｃ，６ｃを襷掛け状に設けた外形形状の中空形材６としてもよい。 Furthermore, in the first to fourth embodiments, each of the extrusion dies 10 to 13 can form the hollow section 1 having a cross-sectional shape. In the fifth to seventh embodiments, each of the extrusion dies 14 is formed. 16 to 16 can form the hollow sections 2 to 4 having a cross-sectional lattice shape, respectively, but is not limited thereto. By changing the shape of the plurality of inner molding pieces, for example, as shown in FIG. 28 (A), the outer peripheral walls 5a and 5a have two vertical walls and one horizontal partition wall 5b and 5b in two horizontal directions. You may comprise so that the hollow shape material 5 in which the cross | intersection part X was formed can be shape | molded.
Further, as shown in FIG. 28 (B), by changing the shape of the plurality of inner molding pieces, partition walls 6c, 6c are formed at the four corners of the outer peripheral walls 6a, 6a formed in a rectangular tube shape. It is good also as the hollow shape material 6 of the external shape which provided in the shape of a hook.
　本願発明の押出しダイスは、高力系合金、特に、いわゆる７０００系といった高強度アルミニウム合金を用い、内部に仕切り壁を備えた中空形材を成形する際に利用される。 The extrusion die of the present invention is used when a high-strength alloy, in particular, a high-strength aluminum alloy such as a so-called 7000 series is used to form a hollow shape member having a partition wall inside.
　　１　断面田の字状の中空形材（第１～４実施形態により形成される中空形材）
　　２　断面格子状の中空形材（第５実施形態により形成される中空形材）
　　３　断面格子状の中空形材（第６実施形態により形成される中空形材）
　　４　断面格子状の中空形材（第７実施形態により形成される中空形材）
　１０　中空形材成形用押出しダイス（第１実施形態）
　１１　中空形材成形用押出しダイス（第２実施形態）
　１２　中空形材成形用押出しダイス（第３実施形態）
　１３　中空形材成形用押出しダイス（第４実施形態）
　１４　中空形材成形用押出しダイス（第５実施形態）
　１５　中空形材成形用押出しダイス（第６実施形態）
　１６　中空形材成形用押出しダイス（第７実施形態）
　２０　オス型部材
　２２　スパイダー
　２３　マンドレル部
２３Ｂ　内側成形用駒
　２４　ブリッジ部
２４ａ～２４ｄ　第１～第４ブリッジ
２４Ａ　ブリッジ先端外周面
　２５　ホルダー部
　２６　ブリッジ保持部
２６Ｂ　ブリッジ当接係合面であるブリッジ受座面
　３０　メス型部材
３０Ｂ　外側成形ダイス穴部
　５０　形材形成用外側穴部
　５１　形材形成用内側穴部
　ＢＨ　ビレット挿通穴（ビレット合流空間）
ＢＨ１　ビレット挿通穴（ビレット合流空間）
　　Ｓ　ビレット導入部
　　Ｍ　ブリッジ部圧入構造
　　Ｎ　ブリッジ部焼き嵌め構造 1 Cross-section hollow shape (hollow shape formed according to the first to fourth embodiments)
2 Cross section lattice-shaped hollow section (hollow section formed by the fifth embodiment)
3 Cross section lattice-shaped hollow section (hollow section formed by the sixth embodiment)
4 Cross section lattice-shaped hollow section (hollow section formed by the seventh embodiment)
10 Extrusion Dies for Hollow Shape Molding (First Embodiment)
11 Extrusion Dies for Hollow Shape Molding (Second Embodiment)
12 Extrusion Dies for Hollow Shape Molding (Third Embodiment)
13 Extrusion Dies for Hollow Shape Molding (Fourth Embodiment)
14 Extrusion Dies for Hollow Shape Molding (Fifth Embodiment)
15 Extrusion Dies for Hollow Shape Molding (Sixth Embodiment)
16 Extrusion Dies for Hollow Shape Molding (Seventh Embodiment)
20 Male member 22 Spider 23 Mandrel portion 23B Inner molding piece 24 Bridge portions 24a to 24d First to fourth bridges 24A Bridge tip outer peripheral surface 25 Holder portion 26 Bridge holding portion 26B Bridge seat which is a bridge contact engagement surface Surface 30 Female mold member 30B Outer forming die hole part 50 Outer hole part for shape forming 51 Inner hole part for forming part BH Billet insertion hole (Billet confluence space)
BH1 Billet insertion hole (Billet confluence space)
S Billet introduction part M Bridge part press-fit structure N Bridge part shrink fit structure

Claims (6)

  1. 　上流側から送込まれるアルミニウム合金からなるビレットを下流側に向けて案内しつつ中空形材の内側形状を成形するオス型部材と、このオス型部材を外周部で保持すると共に前記中空形材の外側形状を成形するメス型部材とを備えた中空形材成形用押出ダイスであって、
    　前記オス型部材を、前記内側形状を成形するマンドレル部と、このマンドレル部の外周部に複数のブリッジ部を介して一体的に連結されたホルダー部とにより構成し、
    　前記マンドレル部の中央領域に前記ビレットの一部を下流側に向けて案内するビレットガイド穴を設け、
    　このビレットガイド穴の上流側開口面積を下流側開口部の開口面積よりも大きく形成し、
    　前記ビレットガイド穴の下流側で、且つ前記各ブリッジ部側から流入するビレットとの合流空間をなすビレット流入隙間空間を下流側に向けて維持しつつ前記中空形材の内部で連続仕切壁を形成する位置に、複数の内側成形用駒を固定装備したことを特徴とする中空形材成形用押出ダイス。     A male member that forms the inner shape of the hollow member while guiding the billet made of an aluminum alloy fed from the upstream side toward the downstream side, and holding the male member at the outer periphery and An extrusion die for forming a hollow material having a female member for forming an outer shape,
    The male member is composed of a mandrel part for forming the inner shape, and a holder part integrally connected to the outer peripheral part of the mandrel part via a plurality of bridge parts,
    A billet guide hole for guiding a part of the billet toward the downstream side is provided in a central region of the mandrel part,
    The upstream opening area of this billet guide hole is formed larger than the opening area of the downstream opening,
    A continuous partition wall is formed inside the hollow shape member while maintaining a billet inflow gap space that forms a merge space with the billet flowing in from each bridge portion side on the downstream side of the billet guide hole toward the downstream side. An extrusion die for forming a hollow shape member, wherein a plurality of inner forming pieces are fixedly installed at a position to be formed.
  2. 　請求項１に記載の中空形材成形用押出ダイスにおいて、
    　前記ビレットガイド穴を、上流側の大開口穴と、この大開口穴の底部に形成された下流側の小開口穴とからなる段付穴としたことを特徴とする中空形材成形用押出ダイス。     In the extrusion die for hollow shape molding according to claim 1,
    An extrusion die for forming a hollow shape, wherein the billet guide hole is a stepped hole including a large opening hole on the upstream side and a small opening hole on the downstream side formed in the bottom of the large opening hole. .
  3. 　請求項２に記載の中空形材成形用押出ダイスにおいて、
    　前記上流側の大開口穴の内壁面を、当該大開口穴の底部よりも開口側が大きい開口面積となるテーパー状に形成したことを特徴とする中空形材成形用押出ダイス。     In the extrusion die for hollow shape molding according to claim 2,
    An extrusion die for forming a hollow shape, wherein the inner wall surface of the upstream large opening hole is formed in a taper shape having an opening area larger on the opening side than the bottom of the large opening hole.
  4. 　請求項１に記載の中空形材成形用押出ダイスにおいて、
    　前記ビレットガイド穴を、前記上流側開口部から前記下流側開口部に向かって先細り形状のテーパー形状としたことを特徴とする中空形材成形用押出ダイス。     In the extrusion die for hollow shape molding according to claim 1,
    An extrusion die for forming a hollow material, wherein the billet guide hole is tapered from the upstream opening toward the downstream opening.
  5. 　請求項１ないし請求項３のいずれか一項に記載の中空形材成形用押出ダイスにおいて、
    　前記下流側の小開口穴を複数設けたことを特徴とする中空形材成形用押出ダイス。     In the extrusion die for hollow shape molding according to any one of claims 1 to 3,
    An extrusion die for forming a hollow shape material, wherein a plurality of the downstream small opening holes are provided.
  6. 　請求項２、３または５に記載の中空形材成形用押出ダイスにおいて、
    　前記複数の内側成形用駒によって設定される複数の仕切壁形成用の隙間交点に対向して、前記ビレットガイド穴の小開口穴を配置したことを特徴とする中空形材成形用押出ダイス。     In the extrusion die for hollow shape molding according to claim 2, 3 or 5,
    An extrusion die for forming a hollow shape member, wherein a small opening hole of the billet guide hole is arranged so as to face a plurality of gap intersections for forming partition walls set by the plurality of inner forming pieces.
PCT/JP2014/067285 2013-09-26 2014-06-27 Extrusion die for forming hollow material WO2015045537A1 (en)

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