WO2006106622A1 - Device and method for elliptically processing metal tube and metal tube product - Google Patents

Device and method for elliptically processing metal tube and metal tube product Download PDF

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Publication number
WO2006106622A1
WO2006106622A1 PCT/JP2006/306136 JP2006306136W WO2006106622A1 WO 2006106622 A1 WO2006106622 A1 WO 2006106622A1 JP 2006306136 W JP2006306136 W JP 2006306136W WO 2006106622 A1 WO2006106622 A1 WO 2006106622A1
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WO
WIPO (PCT)
Prior art keywords
metal tube
pressurizing
flattening
metal
tube
Prior art date
Application number
PCT/JP2006/306136
Other languages
French (fr)
Japanese (ja)
Inventor
Yoshihide Fujita
Fumio Kanno
Atsushi Yamanaka
Toru Yamanaka
Takao Minagawa
Original Assignee
Infec Corporation
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 Infec Corporation filed Critical Infec Corporation
Priority to EP06730084A priority Critical patent/EP1864725A1/en
Priority to JP2007512512A priority patent/JP4418838B2/en
Publication of WO2006106622A1 publication Critical patent/WO2006106622A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/025—Stamping using rigid devices or tools for tubular articles

Definitions

  • the present invention relates to an apparatus and method for flattening a metal tube having a circular vertical cross section with respect to the tube center axis with a press die, and a metal tube product, for example, a brake for a four-wheel vehicle. It can be used to manufacture pedal arms, suspension arms, main frames of motorcycles, etc. by flattening metal pipes. Background art
  • Fig. 22 shows a case where a metal pipe 200 having a circular vertical cross section with respect to the pipe center axis is flattened with a press device having two press dies having a flat pressing surface.
  • the upper die 210 as one press die moves up and down relative to the lower die 211 as the other press die fixedly set at a position facing the upper die 210 in the vertical direction.
  • the surfaces of the upper mold 210 and the lower mold 211 facing the metal pipe 200 are flat surfaces 210A and 211A.
  • the metal pipe is lowered by lowering the upper mold 210 force S and the lower mold 211.
  • the two-dot chain lines 212 and 213 in FIG. 22 indicate the relative positions of the flat surfaces 210A and 211A with respect to the metal tube 200 when the metal tube 200 is flattened to a predetermined thickness by the upper and lower molds 210 and 211. Show me!
  • the circumferential length of the portion 200A above the two-dot chain line 212 in the metal tube 200 and the circumferential length of the portion 200B below the two-dot chain line 213 are those on the flat surfaces 210A and 211A.
  • the upper portion 20OA and the upper portion 20OA are in contact with each other.
  • a load in the compression direction indicated by the arrow in FIG. 23 is generated in the lower portion 200B. Therefore, in the middle of the flattening force of the metal tube 200, the upper portion 200A and the lower portion 200B are recessed inwardly of the metal tube 200 due to buckling of these portions 200A and 200B. Part 200C is generated.
  • Patent Documents 1 and 2 there is a technique for forming a metal tube into a predetermined cross-sectional shape. It is shown.
  • the technology of Patent Document 1 is a bulging process in which a metal pipe is filled with a pressure fluid and the metal tube is molded into a predetermined cross-sectional shape by the pressure.
  • the technology of Patent Document 2 is formed by two press dies. A core member is inserted into the inside of the metal tube, and the metal tube is formed into a predetermined cross-sectional shape by the core member.
  • Patent Document 1 JP-A-11-333526
  • Patent Document 2 JP 2002-86217
  • pressure fluid is a main technical element
  • a core member is a main technical element. If an attempt is made to flatten a metal tube using the techniques of Patent Documents 1 and 2, these technical elements increase the manufacturing cost of the entire device and the flattening cost of the metal tube. For this reason, to develop a technology that can flatten metal pipes without the formation of recesses by using only two press dies such as the upper and lower dies, or using the two press dies as the main technical element. Is required.
  • An object of the present invention is to flatten a metal tube without generating a recess by using only two press dies such as an upper die and the like, or using two press dies as main technical elements. It is to provide an apparatus and method that can be used, and a metal tube product.
  • the metal tube flattening apparatus has two press dies facing each other, and a metal tube having a circular vertical cross section with respect to the tube center axis is formed by the two press dies.
  • a metal tube flattening apparatus for flattening the metal tube by applying pressure at least one of the two press dies becomes a part of the surface of the metal tube.
  • a first pressurizing unit that pressurizes the first part toward the center of the metal tube, and pressurizing units on both sides in the circumferential direction of the metal tube with the first pressurizing unit interposed therebetween.
  • First force of the first part The second pressurizing part pressurizes the second part of the surface of the metal tube, which is displaced in the inner direction of the metal tube, by generating a pressurizing component toward the first part. It is characterized by having.
  • At least one of the two press dies is A first pressurizing part that pressurizes the first part that is a part of the surface of the metal tube toward the center of the metal tube, and a circle of the metal tube with the first pressurizing part in between It is a pressurizing part on both sides in the circumferential direction, and the first part force is applied to the second part of the surface of the metal tube, which is displaced inward of the metal tube, by generating a pressure component toward the first part side.
  • the first pressurizing unit pressurizes the first part of the metal tube toward the center of the metal tube, and the second pressurizing unit includes the metal tube.
  • the second part of the metal tube is directed toward the first part.
  • the second part of the metal tube that is pressurized by generating a pressurizing component and pressurized by the second pressurizing part in this way has the first part force as well as the metal pipe. Since this is a part of the surface of the metal tube that is displaced inwardly of the inside of the metal tube, a hollow portion that is recessed toward the inside of the metal tube is generated in the metal tube by the pressurizing component of the pressure of the second caloric pressure portion. Can be prevented.
  • the cross-sectional shape of the metal tube after the flattening work is obtained by making the surface facing the two press-type metal pipes into an arbitrary shape. It can be finished in any shape.
  • An example in which the surface facing the metal tube in the one pressing die has a surface of an arbitrary shape includes a curved concave surface having a radius of curvature larger than the vertical cross section of the metal tube. It is to be a surface.
  • the first pressure part and the second pressure part can be provided on the curved concave surface.
  • the curved concave surface may be a concave surface formed by a plurality of curvature radii or may be a concave surface formed by a plurality of curvature radii.
  • the surface facing the metal tube in the one press mold is a surface having an arbitrary shape is that the surface includes at least one flat surface.
  • one of the first pressurizing unit and the second pressurizing unit can be provided on the one flat surface.
  • the other pressurizing part may be provided on a curved concave surface formed on the one press die, which may be provided on another flat surface formed on the one press die.
  • the first pressurizing unit and the second pressurizing unit may be provided in only one of the two press dies, or may be provided in both of the two press dies. .
  • the surface of the remaining press dies facing the metal tube is, for example,
  • the metal pipe having a circular vertical cross-section with respect to the pipe center axis can be formed of a concave concave surface having the same radius of curvature as the vertical cross-section of the metal pipe.
  • the sizes of the pressurizing components generated by the second pressurizing units of the press dies are different. It may be the same or the same. If the size of these pressurizing components is the same, the cross-sectional shape of the flattened portion of each of the two press dies in the metal tube is made symmetrical to each other so that the metal tube is flattened. Can be processed.
  • the metal tube flattening apparatus according to the present invention is also applicable to the case where the two press dies are molds for bending the metal tube while flattening the metal tube. Can be applied.
  • the pressurizing part is a pressurizing part for pressurizing the non-bent caulking part without bending the metal pipe, and at least of the two press molds, the metal pipe compressed by bending is used.
  • the fourth part of the surface of the metal tube which is displaced inward of the metal tube, is directed toward the third part.
  • a fourth pressurizing unit that generates and pressurizes the pressurizing component, and the pressurizing component of the pressurizing force of the fourth pressurizing unit is supplied to the second pressurizing unit. Make the pressure larger than the pressure component.
  • At least the press mold that faces the compression side of the metal tube compressed by the bending cage becomes a part of the surface of the metal tube as described above.
  • a third pressurizing part that pressurizes three parts toward the center of the metal tube, and a pressurizing part on both sides in the circumferential direction of the metal tube with the third pressurizing part interposed therebetween,
  • a fourth pressurizing part that pressurizes the fourth part of the surface of the metal tube, which is displaced from the inner side of the metal pipe, by generating a pressurizing component directed toward the third part.
  • the pressure component of the pressurizing force of the fourth pressurizing part is set to be larger than the pressurizing component of the pressurizing force of the second pressurizing part.
  • the metal tube including this bent portion can be flattened while preventing the indentation from occurring inside the tube.
  • the third pressurizing part and the fourth pressurizing part are provided on the press mold facing at least the compression side of the metal tube compressed by the bending cage among the two press molds.
  • the surface facing the bending calorie portion of the metal tube in the press die facing the compression side of the metal tube compressed by bending is provided with a third pressure part and a fourth pressure part.
  • the facing surface can be a surface of any shape.
  • this surface a surface including a curved concave surface having a larger radius of curvature than the vertical cross section of the metal tube.
  • the third pressure part and the fourth pressure part can be provided on the curved concave surface.
  • the curved concave surface may be a concave surface with a single curvature radius or a concave surface formed by combining a plurality of surfaces with a plurality of curvature radii.
  • Another example of the surface provided with the third pressure portion and the fourth pressure portion is to make this surface a surface including at least one flat surface.
  • one of the third pressurizing part and the fourth pressurizing part can be provided on this one flat surface.
  • the other pressurizing part may be provided on a curved concave surface formed on this press die, which may be provided on another flat surface formed on the press die facing the compression side of the metal tube compressed by bending.
  • the third pressurizing part and the fourth pressurizing part may be provided only in the press die that faces the compression side of the metal tube compressed by the bending cage, of the two press dies. It may be provided on both of the two press dies.
  • the surface facing the bent portion of the metal tube in the remaining press mold may be perpendicular to the tube center axis. It can be formed of a curved concave surface having the same radius of curvature as this vertical cross section of the circular metal tube.
  • the magnitude of the pressurizing component of the pressurizing force of the fourth pressurizing unit of these press molds May be different or the same. If these pressure components have the same size, the cross-sectional shapes of the flattened portions of the two press dies in the bending calorie portion of the metal tube are made symmetrical to each other.
  • the metal tube can be flattened.
  • one end surface of the metal tube in the tube center axis direction abuts, and this one end surface is moved outward in the tube center axis direction by the contact.
  • Each surface of the two press dies facing the outer peripheral surface of the other end portion in the tube center axis direction of the metal tube has the other end portion whose vertical section with respect to the tube center axis is the circular shape.
  • the outer peripheral surface of the other end at the end of the flattening operation of the metal tube by the two press dies is surrounded by these curved concave surfaces. May be.
  • the total length of the metal tube is the tube center axis because of the surplus material of the metal tube generated by the flattening process.
  • the extension of the entire length of the metal tube is the other in the tube center axis direction. It occurs as an extension to the side.
  • each of the two press dies facing the outer peripheral surface of the other end portion in the tube center axis direction of the metal tube Is formed by a curved concave surface having the same radius of curvature as the other end of which the vertical cross-section with respect to the tube center axis is circular, and at the end of flattening of the metal tube by the two press dies
  • the outer peripheral surface of the other end is surrounded by these curved concave surfaces, the other end is not flattened by the two press dies.
  • At least one press die of the two press dies is formed including a die body and a pressure die in which at least part of the die body is embedded
  • the end face movement restricting portion may be a rising wall formed in the mold main body in order to embed at least a part of the pressure mold.
  • the end face movement restricting portion may be formed by using a rising wall portion such as a recess or a through hole formed in the die body in order to embed at least a part of the pressurizing die.
  • the flattening apparatus for a metal pipe is configured such that when the metal pipe is flattened by the two press dies, the metal pipe is metallized from one end in the pipe central axis direction of the metal pipe.
  • the cross-sectional shape of the metal tube accurately corresponds to the shape of the core member by the pressing action of the two press dies in the length range in which the core member is inserted out of the total length of the metal tube. It can be formed into a shaped shape.
  • the length range in which the core member is not inserted out of the total length of the metal tube can be flattened by the two press dies. Therefore, the flattening apparatus includes the two flattening apparatuses.
  • the press mold is the main technical element, and the core member is an accompanying technical element.
  • one of the two press dies is used for drilling a metal tube.
  • At least one punch member may be provided, and a guide hole for guiding the punch member may be formed in the core member.
  • the core member can also be used as a guide member for guiding a punch member when drilling a metal tube.
  • the metal tube flattening method according to the present invention is such that the vertical cross section with respect to the tube center axis is circular! /, And the metal tube is pressed by two press dies facing each other.
  • the two press dies are used to force the first part that is a part of the surface of the metal tube toward the center of the metal tube.
  • the first pressurizing step for pressurizing the first part, which is part of the surface of the metal tube by two press dies, toward the center of the metal tube
  • the second part on the surface of the metal tube which is a part on both sides in the circumferential direction of the metal pipe, with respect to the first part by at least one of the two press dies
  • a second pressurizing step is performed to pressurize by generating a pressurizing component directed toward the first part, and the second part is the first part force of the metal tube shifted inward of the metal tube.
  • the metal component is prevented from being formed in the metal tube by the pressurizing component of the pressurizing force acting on the second pressurizing unit, while the concave portion recessed to the inside of the metal tube is prevented. Can be flattened.
  • the core member is moved from one end in the tube center axis direction of the metal tube to the inside of the metal tube to the middle of the entire length of the metal tube. There should be a core member insertion process for insertion.
  • a punch that is arranged in at least one of the two press dies and is guided by a guide hole formed in the core member. You may provide the drilling process for making a hole in a metal pipe with a member.
  • the metal tube product according to the present invention is manufactured by the apparatus or method according to the present invention described above.
  • the present invention described above is the entire length of the metal tube, that is, the entire length of the metal tube. This can be applied to both the case where the body is flattened and the case where a part of the length of the metal tube is flattened. Also, before flattening the metal tube, bending, expanding the diameter of the metal tube to increase the diameter of a part of the metal tube, or reducing the diameter of a part of the metal tube in the length direction Preliminary power checks such as a reduced diameter carriage may be performed.
  • the flattened metal tube may be a single tube, or may be a plurality of tubes with different diameters or the same diameter joined in series.
  • the metal pipe product can be used for any application.
  • An example of such an application is a brake pedal arm of a vehicle, another application is a suspension arm of a vehicle, and another application is a main frame of a motorcycle.
  • the metal pipe product according to the present invention is used as an arm for a brake pedal of a vehicle
  • the arm is formed by a flattened metal pipe with a hollow portion left inside. .
  • the hollow portion may be provided in only a part of the entire length of the metal tube which may be continuous over the entire length of the metal tube. In the latter case, the length of the entire length of the metal tube that is not a hollow portion is pushed by work performed after the flattening process, which may be crushed simultaneously with the flattening process. It may be crushed.
  • a metal pipe used as a brake pedal arm of a vehicle has a large dimension part having a large vertical dimension and a small dimension part having a small vertical dimension smaller than the large dimension part. It is preferable that a hole for horizontally inserting the pivot center axis of the brake pedal arm is formed in the dimension part.
  • the brake pedal arm is provided with a large dimension part having a large vertical dimension and a small dimension part having a small vertical dimension smaller than the large dimension part.
  • the two surfaces facing the left and right direction of the large dimension portion may be projecting surfaces that are curved outward and may protrude as flat surfaces that are parallel to each other.
  • the two surfaces facing the left and right direction of the large dimension portion are flat surfaces that are parallel to each other, the two surfaces are made to project by curving outward or the like. Since the dimension in the vertical direction of the large dimension portion can be increased as compared with the case, the section modulus of the large dimension portion can be increased.
  • the large dimension portion is inserted into the core inserted into the metal tube. Without using any members, it can be formed by a flattening cage using two press dies.
  • FIG. 1 is a cross-sectional view of a flattening apparatus showing upper and lower mold parts that are two press molds according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along line S2-S2 of FIG.
  • FIG. 3 is a cross-sectional view showing a case where a metal tube is flattened in the upper and lower molds of FIG.
  • FIG. 4 is a view similar to FIG. 2 showing the second embodiment.
  • FIG. 5 is a view similar to FIG. 3 of the second embodiment.
  • FIG. 6 is a view similar to FIG. 1 showing a third embodiment in which the upper and lower molds are molds for bending metal pipes.
  • FIG. 7 is a cross-sectional view of the metal tube during flattening at the position S7-S7 in FIG. 6, which is the position of the non-bending portion of the metal tube.
  • FIG. 8 is a cross-sectional view of the metal tube during flattening at the position S8-S8 in FIG. 6, which is the position of the bent portion of the metal tube.
  • Fig. 9 is a view similar to Fig. 7 showing a fourth embodiment in which the upper and lower molds are molds for bending a metal tube, and the pressurizing surface of the pressurizing mold is formed of a plurality of flat surfaces. It is.
  • FIG. 10 is a view similar to FIG. 8 of the fourth embodiment.
  • FIG. 11 is a perspective view showing a metal tube used in the fifth embodiment before flattening.
  • FIG. 12 is a perspective view showing a state after the flattening force of the metal tube in FIG.
  • FIG. 13 is a cross-sectional view of the main part of the flattening apparatus showing the upper and lower mold parts that are two press molds according to the fifth embodiment.
  • FIG. 14 is a view taken in the direction of arrows S 14-S 14 in FIG.
  • FIG. 15 is a cross-sectional view of a principal part of a flattening device of a fifth embodiment after flattening a metal tube.
  • FIG. 16 is a view similar to FIG. 15 showing the sixth embodiment.
  • FIG. 17 is a plan view showing a brake pedal arm of a vehicle manufactured by a metal pipe product manufactured by the flattening apparatus of the sixth embodiment and a brake pedal attached to the arm. It is.
  • FIG. 18 is a side view showing the brake pedal arm and the brake pedal of FIG.
  • FIG. 19 is a sectional view taken along line S19—S19 in FIG.
  • FIG. 20 is a cross-sectional view taken along line S20—S20 in FIG.
  • FIG. 21 is a view similar to FIG. 20, showing a brake pedal arm according to another embodiment.
  • FIG. 22 is a cross-sectional view showing a state before pressurization when a metal tube is flattened by an upper and lower mold in which a pressurization surface is a flat surface.
  • FIG. 23 is a cross-sectional view showing a case where a metal tube is flattened with the upper and lower molds of FIG. Explanation of symbols
  • FIG. 1 is a cross-sectional view showing portions of upper and lower molds 10 and 13 of a press device that is a flattening device for a metal tube according to the first embodiment.
  • These upper and lower dies 10, 13 which are two press dies are the press dies, which are embedded in the mold bodies 11 and 14 and the recesses 11A and 14A formed in the mold bodies 11 and 14, respectively. 12 and 15.
  • the metal pipe 1 according to this embodiment is a straight pipe in which the pipe center axis N is straight and the same diameter is continuous over the entire length.
  • the metal tube 1 is a circular tube having a circular vertical cross section with respect to the tube center axis N as shown in FIG. 2 which is a cross-sectional view taken along line S2-S2 of FIG.
  • the surfaces of the upper and lower molds 10, 13 facing the metal tube 1, in other words, the pressurizing surfaces 12A, 15A for pressurizing the metal tube 1 are: These curved concave surfaces are arcuate surfaces and are formed with a radius of curvature larger than the radius of curvature of the circular vertical cross section of the metal tube 1. The radii of curvature of these pressing surfaces 12A and 15A are the same.
  • the metal tube 1 is set on the pressing surface 15A of the pressing mold 15 of the lower mold 13 when the upper and lower molds 10, 13 are opened, and the upper mold 10 is lowered.
  • the metal tube 1 is flattened by the pressurizing molds 12 and 15 as shown in FIG.
  • This flattening cache is first a part of the surface of the metal tube 1, and the force of the highest part 1A and the lowest part 1B in the horizontal center part of Figs. 1 part 1A, 1B is started by pressing toward the center of the metal tube 1 with the pressurizing surfaces 12A, 15A of the pressurizing dies 12, 15, and the upper die 10 is continuously lowered to 10, the second part 1C, which is the part of the surface of the metal tube 1 on both sides in the circumferential direction of the metal tube 1 with respect to the first part 1A, is pressed by the pressing surface 12A of the pressurizing die 12 and In the mold 13, the second part 1 ⁇ / b> D, which is a part on both sides in the circumferential direction of the metal pipe 1, is pressed against the first part 1 ⁇ / b> B by the pressurizing surface 15 ⁇ / b> A of the pressurizing mold 15.
  • the portion of the pressurizing surfaces 12A and 15A that generates the pressure F is a first pressurizing unit that pressurizes the first parts 1A and 1B of the metal tube 1 after the upper mold 10 starts to descend.
  • the portions of the pressure surfaces 12A and 15A that generate the pressure F on both sides of the metal tube 1 in the circumferential direction with the first pressure portions 1A and 1B interposed therebetween are as follows: Then metal
  • the lowering of the upper mold 10 progresses. Move to the position away from the first part 1A, 1B in the circumferential direction of the metal tube 1 from the first part 1A, 1B.
  • the circumferential length of the metal tube 1 pressurized with the pressurizing dies 12, 15 is the same as in FIG. Is longer than the length of the pressurizing surfaces 12A and 15A of the pressurizing dies 12 and 15 in contact with each other in the circumferential direction, so that the metal pipes 1 sandwiching the first portions 1A and 1B therebetween.
  • a load in the compressive direction is generated on both sides in the circumferential direction of the first portion 1A and IB.
  • the pressure F acts on the metal pipe 1 at the second parts 1C and 1D which are the parts on both sides in the circumferential direction of the metal pipe 1 with respect to the first parts 1A and 1B.
  • the pressurizing force F has a pressurizing component F toward the first parts 1A and 1B, and the second part
  • the parts 1C and 1D are the parts of the surface of the metal tube 1 shifted from the first parts 1A and 1B toward the inside of the metal pipe 1, the pressurizing component F of the pressure F acting on the second part 1C By the gold
  • the first part 1B is pushed down to the pressure surface 15A side. For this reason, the metal tube 1 is flattened without generating a hollow portion that is recessed toward the inside of the metal tube 1.
  • the pressing molds 12A and 15A that pressurize the metal tube 1 are curved concave surfaces on the upper and lower molds 10, 13 that are two press molds facing each other vertically.
  • the metal tube 1 can be flattened to a predetermined thickness without the formation of a dent, and the press device does not need to be equipped with special members or equipment. Therefore, it is possible to reduce the manufacturing cost of the entire pressing device and the flattening cost of the metal tube 1
  • the flattening work for one metal tube 1 is completed only by moving the upper die 10 up and down once relative to the lower die 13, so that the flattening work can be performed efficiently.
  • a large number of metal pipes 1 can be processed in a short time.
  • the pressurizing surfaces 12A and 15A of the pressurizing dies 12 and 15 arranged separately in the upper and lower molds 10 and 13 are curved concave surfaces having the same radius of curvature.
  • the upper and lower parts of the tube center axis N are symmetrical with the parts formed by the pressure surfaces 12A and 15A.
  • the shape can be flattened.
  • the upper and lower molds 20, 23 show the upper and lower molds 20, 23 according to the second embodiment.
  • the upper and lower molds 20, 23 include mold bodies 21, 24, and pressurization molds 22, 25 that are embedded and set in the recesses 21A, 24A formed in these mold bodies 21, 24.
  • the force provided The caloric pressure surfaces 22A and 25A of these pressurizing dies 22 and 25 are not formed as curved concave surfaces, and the first flat surfaces 26 and 28 in the center of the horizontal diameter of the metal tube 1 and their first It is formed by the second flat surfaces 27 and 29 provided on both sides in the horizontal diameter direction of the metal tube 1 with respect to the flat surfaces 26 and 28, in other words, on both sides in the circumferential direction of the metal tube 1.
  • the second flat surface 27 of the pressing mold 22 of the upper mold 20 is an inclined surface inclined downward from the first flat surface 26, and the second flat surface 29 of the pressing mold 25 of the lower mold 23 is 1It is an inclined surface inclined upward from the flat surface 28.
  • the first portion 1A which is the highest portion and the lowest portion of the metal tube 1, and IB are the pressure surfaces 22A, 25A.
  • the first flat surfaces 26 and 28 are pressurized against the center of the metal tube 1 and then the upper mold 20 is located on both sides of the metal tube 1 in the circumferential direction with respect to the first region 1A.
  • the second part 1C is pressurized by the second flat surface 27 of the pressure surface 22A, and in the lower mold 23, the second part is a part on both sides in the circumferential direction of the metal tube 1 with respect to the first part 1B.
  • 1D is pressed by the second flat surface 29 of the pressing surface 25A. This pressure state is shown in FIG.
  • the first flat surfaces 26, 28 of the pressurizing surfaces 22A, 25A include the first pressurizing unit that pressurizes the metal tube 1 first, and the pressurizing surfaces 22A, 25A On the second flat surfaces 27 and 29, there are second pressurizing portions on both sides in the circumferential direction of the metal tube 1 across the first pressurizing portion and pressurizing the metal tube 1 next.
  • the vertical pressure F acting toward the center of the metal tube 1 acts on the first parts 1A and 1B pressurized by the first pressurizing part, and the first parts 1A and 1B are pressurized by the second pressurizing part. 2 parts
  • a pressing force F that is inclined according to the inclination angle of the second flat surfaces 27 and 29 acts. These applied forces F are applied in the horizontal direction toward the first parts 1A and 1B.
  • the second portion 1C, 1D having the pressurizing component F and the same as the above-described embodiment is the same as the above-described embodiment.
  • the metal tube 1 is connected to the metal tube by the pressurizing component F of the pressurizing force F.
  • the upper and lower molds 20, 23 can be formed by a combination of the first flat surfaces 26, 28 and the second flat surfaces 27, 29.
  • the work for forming these flat surfaces 26, 27, 28, 29 on the pressure dies 22, 25 is easier than the work for forming the curved concave surface on the pressure dies. Can be manufactured.
  • FIG. 6 shows a third embodiment.
  • the upper and lower molds 40, 43 of this embodiment also include mold bodies 41, 44 and pressure molds 4, 2, 45 embedded and set in recesses 41A, 44A formed in these mold bodies 41, 44. Forces These pressure dies 42 and 45 are provided with ridges and valleys for bending the metal tube 31. For this reason, the calo pressure molds 42 and 45 have portions embedded in the four corners 44A and portions exposed from the recesses 41A and 44A.
  • FIG. 7 shows the flattening force of the metal pipe 31 at the position S7—S7 in FIG.
  • FIG. 8 is a cross-sectional view of the metal tube 31 at the position S8-S8 line in FIG. 6 where the bent portion of the metal tube 31 is bent and bent. It is sectional drawing.
  • the pressing surfaces 42A and 45A facing the metal tube 31 in the pressing dies 42 and 45 of the upper and lower dies 40 and 43 are shown in FIGS. Similar to the embodiment, the curved concave surface is formed. These curved concave surfaces are formed in the tube center axis N of the metal tube 31 before being flattened (see Fig.
  • the radius of curvature of the pressing surfaces 42A and 45A at the portion corresponding to the bent portion of the metal tube 31 is equal to that of the metal tube 31. It is smaller than the radius of curvature of the pressure surfaces 42A and 45A at the part corresponding to the non-bending carriage part.
  • the pressing surfaces 42A and 45A having different radii of curvature in the bent and non-bent casing portions are formed in the pressing dies 42 and 45 as smoothly connecting surfaces.
  • the metal tube 31 of this embodiment is a force in which the tube center axis N is bent slightly by a pre-bending process as shown in FIG. Shape
  • the metal pipe that is flattened while being bent in the state may be a straight pipe that has not been pre-bent.
  • the unbent portion of the metal tube 31 shown in FIG. 1st part 31A, 31B force that is the lowest part and the part 1st part 31A, pressurizing face 42A, 45B pressure surface 42A, 45A force is applied to the center of the metal tube 31 with force F , 31
  • the second parts 31C and 31D which are parts on both sides in the circumferential direction of the metal pipe 31 with respect to B are pressurized with the pressure F from the caloric pressure surfaces 42A and 45A of the pressure dies 42 and 45. Also shown in Figure 8
  • the third part 31E, 31F which is the highest part and the lowest part of the metal pipe 31 in this bent part is the pressure surface 42A, 45A force of the pressure dies 42, 45
  • the fourth part 31G, 31H which is the part on both sides in the circumferential direction of the metal tube 31 with respect to the third part 31E, 31 F
  • the pressure is applied by the pressure F from the pressure surfaces 42A and 45A of the pressure dies 42 and 45.
  • the pressurizing surfaces 42A and 45A corresponding to the non-bending portion of the metal pipe 31 are provided with a first pressurizing unit that pressurizes the metal pipe 31 with the pressurizing force F, and with the pressurizing force F.
  • the second parts 31C and 31D are displaced inwardly of the first part 31A and 31B force metal tube 1, and the fourth parts 31G and 31H are connected to the metal pipe 1 from the third parts 31E and 31F. It is shifted inward.
  • the pressurizing force F of the second pressurizing unit and the pressurizing force F of the fourth pressurizing unit are equal to the pressurizing surface 42.
  • the applied pressure F is the first part 31A
  • the radius of curvature of the pressurizing surfaces 42A and 45A at the corresponding part is smaller than the radius of curvature of the pressurizing surfaces 42A and 45A at the part corresponding to the non-bending curve part of the metal tube 31, so Formation
  • the fraction F is larger than the pressurizing component F of the applied pressure F.
  • the metal pipe 31 is bent downward by the upper and lower molds 40, 43 with the pressing dies 42, 45 so that the upper mold 40 is bent at the bent portion of the metal pipe 31. Pair with pressure mold 42 The facing upper part 49 is compressed by bending in the direction of the tube center axis N.
  • the compression portion 49 is also a portion that is flattened in the same manner as the non-bending portion, the compression portion 49 has a compressive force in the circumferential direction of the metal tube 31 by the flattening processing. And a compressive force in the direction of the tube center axis N due to the bending process occurs.
  • the pressurizing component F of the pressurizing force F generated by the pressurizing die 42 of the upper die 40 is as follows.
  • the pressure component F can flatten the metal tube 31 while preventing the formation of recesses.
  • the upper and lower molds 40, 43 of the calo pressure molds 42, 45 have curved concave surfaces with the same radius of curvature at the bent portion of the metal tube 31. Therefore, the bent part of the metal tube 1 is
  • Flattening can be performed by making the upper and lower parts related to 2 symmetrical.
  • FIGS. 9 and 10 show a fourth embodiment in which the metal tube 1 is flattened while bending a part of the same metal tube 31 as in the embodiments of FIGS. 6, 7 and 8.
  • 9 is a diagram corresponding to FIG. 7
  • FIG. 10 is a diagram corresponding to FIG.
  • the caloric pressure surfaces 52A and 55A of the caloric pressure molds 52 and 55 set on the mold bodies 51 and 54 of the upper and lower molds 50 and 53 are formed by a combination of a plurality of flat surfaces.
  • the pressurizing surfaces 52A and 55A in the portion corresponding to the non-bending portion of the metal tube 31 shown in FIG. 9 are the first flat surfaces 56 and 58 at the center in the horizontal diameter direction of the metal tube 31.
  • the first flat surfaces 56 and 58 are formed by second flat surfaces 57 and 59 provided on both sides of the horizontal direction of the metal tube 31 in the diametrical direction.
  • the second flat surface 57 of the pressurizing die 52 of the upper die 50 is an inclined surface that is inclined downward from the first flat surface 56 with respect to the horizontal diameter direction of the metal tube 31.
  • the second flat surface 59 of the pressure die 55 extends from the first flat surface 58 to the horizontal straight line of the metal tube 31. It is inclined with an upward inclination with respect to the radial direction.
  • the pressing surfaces 52A and 55A in the portion corresponding to the bent portion of the metal tube 31 shown in FIG. 10 are the third flat surfaces 60 and 62 in the horizontal diametrical center of the metal tube 31, and these The fourth flat surfaces 61 and 63 are provided on both horizontal diametrical sides of the metal tube 31 with respect to the third flat surfaces 60 and 62.
  • the fourth flat surface 61 of the pressurizing die 52 of the upper die 50 is an inclined surface inclined downward from the third flat surface 60 with respect to the horizontal diameter direction of the metal tube 31, and
  • the fourth flat surface 63 of the pressure die 55 is an inclined surface inclined upward from the third flat surface 62 with respect to the horizontal diameter direction of the metal tube 31.
  • the first flat surfaces 56, 58 and the third flat surfaces 60, 62 are smoothly continuous, and the second flat surfaces 57, 59 and the fourth flat surfaces 61, 63 are also smoothly continuous.
  • the inclination angle of the fourth flat surfaces 61 and 63 with respect to the third flat surfaces 60 and 62 is larger than the inclination angle of the second flat surfaces 57 and 59 with respect to the first flat surfaces 56 and 58.
  • the 3rd part 31E, 31F which is the highest part and the lowest part of the metal pipe 31 is applied to the center of the metal pipe 31 by the pressure F from the third flat surface 60, 62 of the pressurizing mold 52, 55.
  • the fourth portions 31G and 31H which are the portions on both sides in the circumferential direction of the metal tube 31 with respect to the third portions 31E and 31F, are the fourth flat surfaces 61 of the pressing dies 52 and 55, respectively.
  • Pressure is applied with pressure F from 63.
  • the first flat surface 56, 58 corresponding to the unbent portion of the metal tube 31 is provided with a first pressurizing part that pressurizes the metal tube 31 with the applied pressure F.
  • Metal on surface 57, 59 is provided with a first pressurizing part that pressurizes the metal tube 31 with the applied pressure F.
  • Metal pipe 31 is pressed with pressure F on the third flat surfaces 60 and 62 corresponding to the brazed part.
  • the third pressurizing part pressurizes the metal pipe 31 with the applied pressure F to the parts of the fourth flat surfaces 61 and 63.
  • the applied pressure F generated in the second pressurizing part is the first part 31
  • a pressurizing component F that goes to the side of A and 31B, and the pressure F generated in the fourth pressurizing part is
  • the inclination angle of the fourth flat surfaces 61, 63 with respect to the third flat surfaces 60, 62 is larger than the inclination angle of the second flat surfaces 57, 59 with respect to the first flat surfaces 56, 58.
  • the pressurizing component F of the pressing force F is larger than the pressing component F of the pressing force F.
  • 31D is displaced from the first portions 31A, 31B toward the inside of the metal tube 1
  • the fourth portions 31G, 31H are displaced from the third portions 31E, 31F toward the inside of the metal tube 1.
  • the metal tube 31 can be flattened while preventing the formation of the recessed portion, as in the embodiments of Figs.
  • FIG. 11 shows the metal pipe 71 before flattening in this embodiment
  • FIG. 12 shows the metal pipe 71 ′ after flattening, in other words, the flattening apparatus for the metal pipe 71 according to this embodiment.
  • metal tube products manufactured by the method The flattened metal tube 71 'is used as a brake pedal arm for a four-wheel vehicle.
  • the metal tube 71 before the flattening cauldron has a large-diameter portion 72 whose diameter has been increased by the diameter-enlarged cauldron, and the large-diameter portion 72 smoothly connected to the large-diameter portion 72. And a small-diameter portion 73 that has not been diameter-expanded.
  • the large-diameter portion 72 is bent at an angle ⁇ relative to the small-diameter portion 73, and the end 73A of the small-diameter portion 73 opposite to the large-diameter portion 72 is bent in a direction different from the angle ⁇ . ing.
  • These diameter expansion pressurization and bending are performed as preliminary processing before flattening.
  • the tube is aligned with the tube center axis N of the metal tube 71.
  • the vertical cross section for 3 3 has the same circular shape as the previous embodiments.
  • the flattened metal tube 71 has a large diameter portion 72 and a large portion of the small diameter portion 73 excluding the end portion 73A being flattened. Also, the large diameter portion 72 and the small diameter portion 73 are bent at an angle 0 larger than the angle 0. Small diameter part 73
  • the reason for not flattening the end 73A of the metal tube 71 is that the metal tube 71 ′ is moved by a cutting tool 74 that moves in a direction perpendicular to the tube center axis N so that the flattened metal tube 71 ′ has a predetermined overall length. 'of This is because if the end 73A is flattened when the end 73A is cut, it becomes difficult to carry out this cutting operation, and the vertical cross section of the end 73A with respect to the tube center axis N
  • end portion 73A can be easily cut without being crushed and deformed by the cutting tool 74 if it is maintained in a circular shape.
  • FIG. 13 is a cross-sectional view of the main part showing the upper and lower molds 80 and 83 of the press device that is a flattening device for the metal pipe 71 according to this embodiment
  • FIG. FIG. 15 is an essential part cross-sectional view of the upper and lower molds 80 and 83 after the metal tube 71 is flattened.
  • the upper and lower dies 80 and 83 which are press dies are the die main bodies 81 and 84, and the pressure dies embedded and set in the recesses 81 ⁇ / b> A and 84 ⁇ / b> A formed in these die main bodies 81 and 84. 82, 85.
  • the surface facing the metal tube 71 of these pressurizing molds 82 and 85 is pressurized to flatten the metal tube 71 except for the portions 82B and 85B facing the end 73A of the small diameter portion 73 of the metal tube 71.
  • the pressure surfaces become 82A and 85A!
  • the portions 82B, 85B facing the end 73A of the small-diameter portion 73 are the cross-sectional shape and curvature of the end 73A before flattening.
  • the outer peripheral surface of the end 73A is simply surrounded by the curved concave surfaces 82B and 85B, and the end 73A is not flattened by the pressure dies 82 and 85! / become like!
  • the pressurizing dies 82 and 85 flatten the first portion 86 and 88 for flattening the large-diameter portion 72 of the metal pipe 71 and the small-diameter portion 73 excluding the end portion 73A.
  • the second portions 87 and 89 are inclined at an upward slope from the horizontal first portions 86 and 88.
  • the metal pipe 71 is flattened and bent at an angle ⁇ between the large-diameter portion 72 and the small-diameter portion 73 at the same time.
  • the thickness of the large-diameter portion 72 after flattening is sufficiently small with respect to the diameter of the large-diameter portion 72 before flattening.
  • the rising wall 84B on the core member 90 side of the recess 84A formed in the mold body 84 of the lower mold 83 and the thickness of the rising wall 84B A guide bush 91 for guiding the forward and backward movement of the core member 90 is incorporated in the portion.
  • the flattening of the metal pipe 71 by the upper and lower molds 80 and 83 has a large diameter which is one end face in the direction of the pipe center axis N in the metal pipe 71. End face of part 72 7
  • the insertion of the core member 90 starts when the core member 90 is inserted into the interior of the metal tube 1 from the end face 72A after the upper die 80 starts to descend and the flattening of the metal tube 1 begins. After this, before the large-diameter portion 72 is formed into a predetermined cross-sectional shape with the pressurization dies 82 and 85, the core member 90 is formed in the middle portion of the large-diameter portion 72 that is halfway along the entire length of the metal tube 71. Inserted into the length range.
  • the flattening of the metal tube 71 is performed while the metal tube 71 is bent at an angle ⁇ between the large diameter portion 72 and the small diameter portion 73, and corresponds to the bent portion of the metal tube 71. Pressurized type
  • the third and fourth pressure members are provided on the pressure and pressure surfaces 82A and 85A of 82 and 85. Yes.
  • a first pressure unit and a second pressure unit are provided.
  • the pressurizing force generated in the fourth pressurizing part has a pressurizing component directed to the pressurizing side by the pressurizing force of the third caloric pressurizing part, and the pressurizing force generated in the second pressurizing part includes the first pressurizing part.
  • the pressing component of the force is greater than the pressing component of the pressing force of the second pressurizing part, so the bent part of the metal pipe 71 is flattened so that no indentation occurs inside the metal pipe 71. To be bent.
  • the portion corresponding to the large diameter portion 72 is flattened until the inner surface of the metal tube 71 contacts the core member 90. It is a part for chemical processing.
  • one end surface 72A of the metal pipe 71 in the direction of the pipe center axis N is brought into contact with the rising wall 84B.
  • the end surface 72A of the metal tube 71 extends outside the tube center axis N.
  • the rising wall 84B force end surface 72A is outside the tube center axis N.
  • the outer peripheral surface of the end 73A of the small-diameter portion 73 is surrounded by the aforementioned curved concave surfaces 82B and 85B of the pressure dies 82 and 85 as shown in FIG. Therefore, the curvature radii of the curved concave surfaces 82B and 85B are the same as the curvature radius of the cross-sectional shape of the small-diameter portion 73 of the metal pipe 71 before flattening, so the end 73A is a circular shape that is not flattened. The cross-sectional shape is maintained as it is.
  • the work of cutting the end 73A with the cutting tool 74 of FIG. 12 can be easily performed as prescribed.
  • the end portion 73A may be cut simultaneously with the flattening of the metal pipe 71 by the lowering of the upper mold 80.
  • FIG. 16 shows the metal tube 71 when the metal tube 71 is flattened and bent.
  • FIG. 6 shows a sixth embodiment in which three large holes 72 can be drilled.
  • Three punch members 92, 93, 94 are attached downward to the upper mold 80 of this embodiment, and a guide hole 90A for guiding the punch members 92, 93, 94 is provided in the core member 90. , 9 OB, 90C are formed.
  • the metal pipe 71 ′ produced by flattening and bending from the metal pipe 1 has a large diameter portion 72 and is guided by these guide holes 90A, 90B, 90C to descend, and the non-chisel brazing material 92, With 93, 94, 95, 96, 97 forces are formed!
  • the holes 95, 96, and 97C required when the metal pipe 71 'is used as the brake pedal arm can be processed simultaneously with the production of the metal pipe 71' from the metal pipe 71.
  • the punch members 92, 93, 94 in FIG. 16 are separated from the mold body 81 in the upper mold 80, for example, the force disposed on the mold body 81 and the pressure mold 82 of the upper mold 80.
  • the large-diameter portion 72 has a predetermined cross-sectional shape between the pressure molds 82 and 85 and the core member 90.
  • holes 95, 96, and 97 are formed in the large-diameter portion 72 by three punch members by lowering the separation mold.
  • FIG. 17 is a plan view showing a brake pedal arm 100 of a four-wheel vehicle made of the metal pipe 71 ′ manufactured in the embodiment of FIG. 16, and a brake pedal 110 attached to the arm 100.
  • FIG. 18 is a side view of the arm 100 and the brake pedal 110.
  • the arm 100 In the arm 100, the end 73A of the small diameter portion 73 of the metal pipe 71 ′ is cut by the cutting tool 74 described above, and the brake pedal 110 is attached to the cut end. Then, as shown in FIG. 17, the arm 100 is bent at the angle 0 shown in FIG. 12 by the bending care by the pressure dies 82 and 85 in FIG. With this angle 0,
  • the arm 100 includes a large dimension portion 101 having a large vertical dimension and a small dimension portion 102 having a vertical dimension smaller than the large dimension portion 101, as described above.
  • the large dimension portion 101 is formed by the large diameter portion 72 described above, and the small dimension portion 102 is formed by the small diameter portion 73.
  • this flattening cover This is performed while leaving a cavity inside, and this cavity is continuous over the entire length of the arm 100.
  • the large dimension portion 101 is provided with the above-described holes 95, 96, 97.
  • the hole 95 is used to connect the link member 111 for connecting the booster of the brake master cylinder and the arm 100 to the arm 100.
  • the hole 96 is used to insert the horizontal rotation center axis 112 of the arm 100, and the hole 97 returns to the arm 100 when rotated downward about the rotation center axis 112. It is used to connect the return spring 113 to the arm 100.
  • FIG. 19 is a cross-sectional view taken along the line S19—S19 in the small-size portion 102 of the arm 100 shown in FIG. 18, and FIG. 20 is a cross-sectional view taken along the line S20—S20 in the large-size proportional distribution 101 of the arm 100 shown in FIG. FIG.
  • the two surfaces 102A facing the left and right direction of the small-sized portion 102 are separated from the protruding surface that protrudes outward by the above-described flattening cache for the small-sized portion 102.
  • the two surfaces 101A facing the left and right directions of the large dimension portion 101 are formed by the above-described flat wrinkle processing force for the large dimension portion 102.
  • the core member 90 Since the process is performed until the inner surface of the large dimension portion 101 comes into contact with each other, the flat surfaces become parallel to each other!
  • the vertical dimension of the small dimension part 102 is H, whereas the vertical dimension of the large dimension part 101 is H, and H is larger than H.
  • Arm 100 brakes the four-wheeled vehicle
  • this portion is a large-size portion 101 whose vertical dimension is larger than that of the small-size portion 102.
  • the section modulus of the large neutral portion 101 with respect to the horizontal neutral axis is reduced. Since the section modulus with respect to the horizontal neutral axis of the portion 102 can be made larger, the strength of the arm 100 against the bending moment can be sufficiently increased.
  • Figure 21 shows a large dimension portion 101 'of another embodiment.
  • the two surfaces 101 ′ A facing the left and right direction of the large dimension portion 101 ′ are projecting surfaces that project outward as well as the two surfaces 102 A of the small dimension portion 102 of FIG. 19. Yes.
  • large The vertical dimension H of the normal part 101 ' is smaller than H, but the large dimension part 101'
  • the operation of forming the holes 95, 96, 97 in the large dimension portion 101 ′ is performed as post-processing after performing the above-described flattening processing and bending processing.
  • the present invention can be used, for example, to manufacture a member used as a brake pedal arm or the like of a four-wheel vehicle by flattening a metal tube.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Braking Elements And Transmission Devices (AREA)
  • Mechanical Control Devices (AREA)

Abstract

A device and a method for elliptically processing a metal tube capable of flattening the metal tube without producing a recessed part by only two press molds such as a cope and a drag or by using these two press molds as major technical elements. These two press molds for flattening, by pressuring, the metal tube (1) having a circular vertical section to the center axis of the tube comprises the cope (10) and the drag (13) having pressuring molds (12) and (15). The faces (12A) and (15A) of the pressuring molds (12) and (15) facing the metal tube (1) are formed by combining curved recessed surfaces or a plurality of flat surfaces with each other, and a first pressuring part for pressuring, against the first portions (1A) and (1B), first portions (1A) and (1B) as a part of the surface of the metal tube (1) and second portions (1C) and (1D) of the surface of the metal tube (1) on both sides of the metal tube (1) in the circumferential direction are present on the surfaces (12A) and (15A). The first pressuring part pressurizes the first portions (1A) and (1B) by a pressuring force (F1) toward the center of the metal tube (1), and the second pressuring part pressurizes the second portions (1C) and (1D) by a pressuring force (F2) having a pressuring component (F2H) toward the first portions (1A) and (1B).

Description

明 細 書  Specification
金属管の扁平化加工装置及びその扁平化加工方法並びに金属管製品 技術分野  Technical field of metal tube flattening apparatus, flattening method thereof, and metal tube products
[0001] 本発明は、管中心軸線に関する垂直断面が円形となっている金属管をプレス型で 扁平化加工するための装置及びその方法、並びに金属管製品に係り、例えば、四輪 車両のブレーキペダル用アームやサスペンションアーム、二輪車両のメインフレーム 等を金属管の扁平化加工によって製造する際に利用することができるものである。 背景技術  TECHNICAL FIELD [0001] The present invention relates to an apparatus and method for flattening a metal tube having a circular vertical cross section with respect to the tube center axis with a press die, and a metal tube product, for example, a brake for a four-wheel vehicle. It can be used to manufacture pedal arms, suspension arms, main frames of motorcycles, etc. by flattening metal pipes. Background art
[0002] 図 22は、管中心軸線に関する垂直断面が円形となっている金属管 200を、加圧面 が平坦面となっている 2個のプレス型を有するプレス装置で扁平化カ卩ェしょうとした 場合におけるこれら 2個のプレス型の部分を示して 、る。一方のプレス型である上型 210は、この上型 210と上下に対向する位置に固定セットされた他方のプレス型とな つて 、る下型 211に対して上下動する。上型 210及び下型 211の金属管 200と対面 する面は平坦面 210A, 211Aとなっており、図 23のように上型 210力 S下型 211に対 して下降することにより、金属管 200は、加圧面となっている平坦面 210A, 211Aか らの加圧力で扁平化加工される。図 22の 2点鎖線 212及び 213は、金属管 200が上 下型 210, 211で所定の厚さ寸法まで扁平化カ卩ェされたときにおける平坦面 210A, 211Aの金属管 200に対する相対位置を示して!/、る。  [0002] Fig. 22 shows a case where a metal pipe 200 having a circular vertical cross section with respect to the pipe center axis is flattened with a press device having two press dies having a flat pressing surface. In these cases, these two press mold parts are shown. The upper die 210 as one press die moves up and down relative to the lower die 211 as the other press die fixedly set at a position facing the upper die 210 in the vertical direction. The surfaces of the upper mold 210 and the lower mold 211 facing the metal pipe 200 are flat surfaces 210A and 211A. As shown in FIG. 23, the metal pipe is lowered by lowering the upper mold 210 force S and the lower mold 211. 200 is flattened by applying pressure from the flat surfaces 210A and 211A serving as pressing surfaces. The two-dot chain lines 212 and 213 in FIG. 22 indicate the relative positions of the flat surfaces 210A and 211A with respect to the metal tube 200 when the metal tube 200 is flattened to a predetermined thickness by the upper and lower molds 210 and 211. Show me!
[0003] 金属管 200における 2点鎖線 212よりも上側の部分 200Aの円周方向長さ及び 2点 鎖線 213よりも下側の部分 200Bの円周方向長さは、平坦面 210A, 211Aにおける これらの部分 200A, 200Bが当接する図 23で示した左右長さ Lよりも長いため、金 属管 200が上下型 210, 211によって扁平化カ卩ェされているときに、上側の部分 20 OAと下側の部分 200Bには、図 23の矢印で示した圧縮方向の荷重が生ずることに なる。このため、金属管 200の扁平化力卩ェの途中において、上側の部分 200Aと下 側の部分 200Bには、これらの部分 200A, 200Bが座屈することにより、金属管 200 の内側へ窪んだ窪み部 200Cが発生してしまう。  [0003] The circumferential length of the portion 200A above the two-dot chain line 212 in the metal tube 200 and the circumferential length of the portion 200B below the two-dot chain line 213 are those on the flat surfaces 210A and 211A. When the metal tube 200 is flattened by the upper and lower molds 210 and 211, the upper portion 20OA and the upper portion 20OA are in contact with each other. A load in the compression direction indicated by the arrow in FIG. 23 is generated in the lower portion 200B. Therefore, in the middle of the flattening force of the metal tube 200, the upper portion 200A and the lower portion 200B are recessed inwardly of the metal tube 200 due to buckling of these portions 200A and 200B. Part 200C is generated.
[0004] 下記の特許文献 1及び 2には、金属管を所定の断面形状に成形するための技術が 示されている。特許文献 1の技術は、金属管の内部に圧力流体を充填し、その圧力 によって金属管を所定の断面形状に成形するバルジ加工であり、特許文献 2の技術 は、 2個のプレス型で成形される金属管の内部に芯部材を挿入し、この芯部材によつ て金属管を所定の断面形状に成形するものである。 [0004] In Patent Documents 1 and 2 below, there is a technique for forming a metal tube into a predetermined cross-sectional shape. It is shown. The technology of Patent Document 1 is a bulging process in which a metal pipe is filled with a pressure fluid and the metal tube is molded into a predetermined cross-sectional shape by the pressure. The technology of Patent Document 2 is formed by two press dies. A core member is inserted into the inside of the metal tube, and the metal tube is formed into a predetermined cross-sectional shape by the core member.
特許文献 1：特開平 11― 333526  Patent Document 1: JP-A-11-333526
特許文献 2 :特開 2002— 86217  Patent Document 2: JP 2002-86217
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0005] 特許文献 1の技術は、圧力流体が主要な技術的要素となっており、特許文献 2の技 術は、芯部材が主要な技術的要素となっている。特許文献 1及び 2の技術を利用し て金属管を扁平化加工しょうとすると、これらの技術的要素のために、装置全体の製 造コストや金属管の扁平化加工コストが高くなつてしまう。このため、上下型等の 2個 のプレス型だけにより、又は 2個のプレス型を主要な技術的要素にして、金属管を窪 み部が発生することなく扁平化加工できる技術を開発することが求められる。 [0005] In the technique of Patent Document 1, pressure fluid is a main technical element, and in the technique of Patent Document 2, a core member is a main technical element. If an attempt is made to flatten a metal tube using the techniques of Patent Documents 1 and 2, these technical elements increase the manufacturing cost of the entire device and the flattening cost of the metal tube. For this reason, to develop a technology that can flatten metal pipes without the formation of recesses by using only two press dies such as the upper and lower dies, or using the two press dies as the main technical element. Is required.
[0006] 本発明の目的は、上下型等の 2個のプレス型だけにより、又は 2個のプレス型を主 要な技術的要素にして、金属管を窪み部が発生することなく扁平化加工できるように なる装置及び方法、並びに金属管製品を提供するところにある。 [0006] An object of the present invention is to flatten a metal tube without generating a recess by using only two press dies such as an upper die and the like, or using two press dies as main technical elements. It is to provide an apparatus and method that can be used, and a metal tube product.
課題を解決するための手段  Means for solving the problem
[0007] 本発明に係る金属管の扁平化加工装置は、互いに対向する 2個のプレス型を有し 、管中心軸線に関する垂直断面が円形となっている金属管を前記 2個のプレス型で 加圧することによって前記金属管を扁平化加工する金属管の扁平化加工装置にお いて、前記 2個のプレス型のうちの少なくとも一方のプレス型は、前記金属管の表面 の一部となっている第 1部位をこの金属管の中心に向力つて加圧する第 1加圧部と、 この第 1加圧部を間に挟んで前記金属管の円周方向両側にある加圧部であって、前 記第 1部位力 前記金属管の内側方向へずれたこの金属管の表面の第 2部位を、前 記第 1部位の側へ向かう加圧成分を生じさせて加圧する第 2加圧部と、を備えている ことを特徴とするものである。  [0007] The metal tube flattening apparatus according to the present invention has two press dies facing each other, and a metal tube having a circular vertical cross section with respect to the tube center axis is formed by the two press dies. In a metal tube flattening apparatus for flattening the metal tube by applying pressure, at least one of the two press dies becomes a part of the surface of the metal tube. A first pressurizing unit that pressurizes the first part toward the center of the metal tube, and pressurizing units on both sides in the circumferential direction of the metal tube with the first pressurizing unit interposed therebetween. First force of the first part The second pressurizing part pressurizes the second part of the surface of the metal tube, which is displaced in the inner direction of the metal tube, by generating a pressurizing component toward the first part. It is characterized by having.
[0008] この扁平化カ卩ェ装置によると、 2個のプレス型のうちの少なくとも一方のプレス型は 、金属管の表面の一部となっている第 1部位をこの金属管の中心に向力つて加圧す る第 1加圧部と、この第 1加圧部を間に挟んで金属管の円周方向両側にある加圧部 であって、第 1部位力 金属管の内側方向へずれたこの金属管の表面の第 2部位を 、第 1部位の側へ向かう加圧成分を生じさせて加圧する第 2加圧部と、を備えている ため、第 1加圧部は金属管の第 1部位をこの金属管の中心に向かって加圧するととも に、第 2加圧部は、金属管の第 2部位を第 1部位の側へ向力 加圧成分を生じさせて 加圧し、このように第 2加圧部で加圧される金属管の第 2部位は、第 1部位力も金属 管の内側方向へずれたこの金属管の表面の部位となっているため、これらの第 2カロ 圧部の加圧力の前記加圧成分により、金属管の内側へ窪んだ窪み部が金属管に発 生することを防止することができる。 [0008] According to this flattening device, at least one of the two press dies is A first pressurizing part that pressurizes the first part that is a part of the surface of the metal tube toward the center of the metal tube, and a circle of the metal tube with the first pressurizing part in between It is a pressurizing part on both sides in the circumferential direction, and the first part force is applied to the second part of the surface of the metal tube, which is displaced inward of the metal tube, by generating a pressure component toward the first part side. The first pressurizing unit pressurizes the first part of the metal tube toward the center of the metal tube, and the second pressurizing unit includes the metal tube. The second part of the metal tube is directed toward the first part. The second part of the metal tube that is pressurized by generating a pressurizing component and pressurized by the second pressurizing part in this way has the first part force as well as the metal pipe. Since this is a part of the surface of the metal tube that is displaced inwardly of the inside of the metal tube, a hollow portion that is recessed toward the inside of the metal tube is generated in the metal tube by the pressurizing component of the pressure of the second caloric pressure portion. Can be prevented.
[0009] そして、このように窪み部の発生を防止して金属管を扁平化加工するための作業は 、前記 2個のプレス型だけを用いて金属管を 1回プレスカ卩ェするだけで終了すること ができ、このため、金属管の扁平化加工作業を効率的に行える。  [0009] Then, the work for flattening the metal tube by preventing the occurrence of the dent in this way is completed by pressing the metal tube once by using only the two press dies. Therefore, the flattening work of the metal pipe can be performed efficiently.
[0010] また、本発明に係る扁平化加工装置において、前記 2個のプレス型の金属管と対 面する面を任意な形状とすることにより、扁平化加工作業後の金属管の断面形状を 任意な形状に仕上げることができる。  [0010] Further, in the flattening apparatus according to the present invention, the cross-sectional shape of the metal tube after the flattening work is obtained by making the surface facing the two press-type metal pipes into an arbitrary shape. It can be finished in any shape.
[0011] 前記一方のプレス型における金属管と対面する面を任意な形状の面とする一例は 、この面を、金属管の前記垂直断面よりも大きい曲率半径となっている湾曲凹面を含 む面とすることである。この例の場合には、湾曲凹面に第 1加圧部と第 2加圧部とを設 けることができる。そして、この例の場合において、湾曲凹面は 1個の曲率半径による 凹面でもよぐ複数の曲率半径による複数の面が組み合わされた凹面でもよい。  [0011] An example in which the surface facing the metal tube in the one pressing die has a surface of an arbitrary shape includes a curved concave surface having a radius of curvature larger than the vertical cross section of the metal tube. It is to be a surface. In the case of this example, the first pressure part and the second pressure part can be provided on the curved concave surface. In the case of this example, the curved concave surface may be a concave surface formed by a plurality of curvature radii or may be a concave surface formed by a plurality of curvature radii.
[0012] また、前記一方のプレス型における金属管と対面する面を任意な形状の面とする他 の例は、この面を、少なくとも 1個の平坦面を含む面とすることである。この例の場合 には、この 1個の平坦面に、第 1加圧部と第 2加圧部のうちの一方の加圧部を設ける ことができる。他方の加圧部は、前記一方のプレス型に形成した他の平坦面に設け てもよぐ前記一方のプレス型に形成した湾曲凹面に設けてもよい。  [0012] Another example in which the surface facing the metal tube in the one press mold is a surface having an arbitrary shape is that the surface includes at least one flat surface. In the case of this example, one of the first pressurizing unit and the second pressurizing unit can be provided on the one flat surface. The other pressurizing part may be provided on a curved concave surface formed on the one press die, which may be provided on another flat surface formed on the one press die.
[0013] 第 1加圧部と第 2加圧部は、前記 2個のプレス型のうちの 1個のプレス型だけに設け てもよく、前記 2個のプレス型の両方に設けてもよい。 [0014] 第 1加圧部と第 2加圧部を前記 2個のプレス型のうちの 1個のプレス型だけに設ける 場合には、残りのプレス型における金属管と対面する面は、例えば、管中心軸線に 関する垂直断面が前記円形となっている金属管のこの垂直断面と同じ曲率半径の湾 曲凹面で形成することができる。 [0013] The first pressurizing unit and the second pressurizing unit may be provided in only one of the two press dies, or may be provided in both of the two press dies. . [0014] When the first pressure part and the second pressure part are provided only in one of the two press dies, the surface of the remaining press dies facing the metal tube is, for example, The metal pipe having a circular vertical cross-section with respect to the pipe center axis can be formed of a concave concave surface having the same radius of curvature as the vertical cross-section of the metal pipe.
[0015] 第 1加圧部と 2加圧部を前記 2個のプレス型の両方に設ける場合には、これらのプ レス型の第 2加圧部によって生ずる前記加圧成分の大きさは異なって 、てもよく、同 じであってもよい。これらの加圧成分の大きさが同じになっていると、金属管における 前記 2個のプレス型のそれぞれで扁平化加工される部分の断面形状を互いに対称 形状にさせて、金属管を扁平化加工することができる。  [0015] When the first pressurizing unit and the two pressurizing units are provided in both of the two press dies, the sizes of the pressurizing components generated by the second pressurizing units of the press dies are different. It may be the same or the same. If the size of these pressurizing components is the same, the cross-sectional shape of the flattened portion of each of the two press dies in the metal tube is made symmetrical to each other so that the metal tube is flattened. Can be processed.
[0016] また、本発明に係る金属管の扁平化加工装置は、前記 2個のプレス型が金属管を 扁平化加工しながらこの金属管を曲げ加工するための型になっている場合にも適用 することができる。  The metal tube flattening apparatus according to the present invention is also applicable to the case where the two press dies are molds for bending the metal tube while flattening the metal tube. Can be applied.
[0017] このように前記 2個のプレス型が金属管を扁平化加工しながらこの金属管を曲げカロ ェするための型になっている場合には、前述した第 1加圧部と第 2加圧部を金属管 の曲げカ卩ェされな 、非曲げカ卩ェ部分を加圧するための加圧部とし、前記 2個のプレ ス型のうち、少なくとも曲げ加工によって圧縮される金属管の圧縮側と対面するプレ ス型を、金属管の表面の一部となっている第 3部位をこの金属管の中心に向力つて 加圧する第 3加圧部と、この第 3加圧部を間に挟んで金属管の円周方向両側にある 加圧部であって、第 3部位力 金属管の内側方向へずれたこの金属管の表面の第 4 部位を、第 3部位の側へ向かう加圧成分を生じさせて加圧する第 4加圧部と、を備え たものにし、この第 4加圧部の加圧力の前記加圧成分を、第 2加圧部の加圧力の前 記加圧成分よりも大きくする。  [0017] Thus, when the two press dies are molds for bending the metal tube while flattening the metal tube, the first pressurizing unit and the second pressurizing unit described above are used. The pressurizing part is a pressurizing part for pressurizing the non-bent caulking part without bending the metal pipe, and at least of the two press molds, the metal pipe compressed by bending is used. A press mold that faces the compression side, a third pressurizing part that pressurizes the third part of the surface of the metal tube against the center of the metal tube, and a third pressurizing part It is a pressurizing part on both sides of the metal tube in the circumferential direction, with the third part force. The fourth part of the surface of the metal tube, which is displaced inward of the metal tube, is directed toward the third part. A fourth pressurizing unit that generates and pressurizes the pressurizing component, and the pressurizing component of the pressurizing force of the fourth pressurizing unit is supplied to the second pressurizing unit. Make the pressure larger than the pressure component.
[0018] 金属管が曲げ加工されると、曲げ加工によって圧縮される金属管の圧縮側には、こ の曲げ加工による管中心軸線方向への圧縮力が生じるため、金属管の曲げ加工さ れる曲げ加工部分は、前述した扁平化加工と併せて大きく圧縮されることになり、こ れにより、金属管には、金属管の内側へ窪んだ窪み部が一層発生しやすくなる。  [0018] When the metal tube is bent, a compressive force is generated in the tube center axis direction by the bending process on the compression side of the metal tube compressed by the bending process, so that the metal tube is bent. The bent portion is greatly compressed together with the flattening described above, and this makes it easier for the metal tube to have a recess that is recessed toward the inside of the metal tube.
[0019] しかし、前記 2個のプレス型のうち、少なくとも曲げカ卩ェによって圧縮される金属管 の圧縮側と対面するプレス型を、上述のように、金属管の表面の一部となっている第 3部位をこの金属管の中心に向かって加圧する第 3加圧部と、この第 3加圧部を間に 挟んで金属管の円周方向両側にある加圧部であって、第 3部位から金属管の内側 方向へずれたこの金属管の表面の第 4部位を、第 3部位の側へ向力う加圧成分を生 じさせて加圧する第 4加圧部と、を備えたものとし、かつ、この第 4加圧部の加圧力の 加圧成分を、第 2加圧部の加圧力の前記加圧成分よりも大きくしておくことにより、金 属管の曲げ加工部分に金属管の内側への窪み部が発生することを防止しながら、こ の曲げ加工部分を含めて金属管を扁平化加工することができる。 [0019] However, of the two press molds, at least the press mold that faces the compression side of the metal tube compressed by the bending cage becomes a part of the surface of the metal tube as described above. First A third pressurizing part that pressurizes three parts toward the center of the metal tube, and a pressurizing part on both sides in the circumferential direction of the metal tube with the third pressurizing part interposed therebetween, A fourth pressurizing part that pressurizes the fourth part of the surface of the metal tube, which is displaced from the inner side of the metal pipe, by generating a pressurizing component directed toward the third part. In addition, the pressure component of the pressurizing force of the fourth pressurizing part is set to be larger than the pressurizing component of the pressurizing force of the second pressurizing part. The metal tube including this bent portion can be flattened while preventing the indentation from occurring inside the tube.
[0020] このように前記 2個のプレス型のうち、少なくとも曲げカ卩ェによって圧縮される金属 管の圧縮側と対面するプレス型に第 3加圧部と第 4加圧部を設ける場合にも、曲げ加 ェによって圧縮される金属管の圧縮側と対面するプレス型における金属管の曲げカロ ェ部分と対面する面は、言い換えると、第 3加圧部と第 4加圧部とを備えている面は、 任意な形状の面とすることができる。  [0020] As described above, when the third pressurizing part and the fourth pressurizing part are provided on the press mold facing at least the compression side of the metal tube compressed by the bending cage among the two press molds. However, in other words, the surface facing the bending calorie portion of the metal tube in the press die facing the compression side of the metal tube compressed by bending is provided with a third pressure part and a fourth pressure part. The facing surface can be a surface of any shape.
[0021] その一例は、この面を、金属管の前記垂直断面よりも大きい曲率半径となっている 湾曲凹面を含む面とすることである。この例の場合には、湾曲凹面に第 3加圧部と第 4加圧部とを設けることができる。そして、この例の場合において、湾曲凹面は 1個の 曲率半径による凹面でもよぐ複数の曲率半径による複数の面が組み合わされた凹 面でもよい。  [0021] An example thereof is to make this surface a surface including a curved concave surface having a larger radius of curvature than the vertical cross section of the metal tube. In the case of this example, the third pressure part and the fourth pressure part can be provided on the curved concave surface. In the case of this example, the curved concave surface may be a concave surface with a single curvature radius or a concave surface formed by combining a plurality of surfaces with a plurality of curvature radii.
[0022] また、第 3加圧部と第 4加圧部とを備えている面についての他の例は、この面を、少 なくとも 1個の平坦面を含む面とすることである。この例の場合には、この 1個の平坦 面に、第 3加圧部と第 4加圧部のうちの一方の加圧部を設けることができる。他方の 加圧部は、曲げ加工によって圧縮される金属管の圧縮側と対面するプレス型に形成 した他の平坦面に設けてもよぐこのプレス型に形成した湾曲凹面に設けてもよい。  [0022] Another example of the surface provided with the third pressure portion and the fourth pressure portion is to make this surface a surface including at least one flat surface. In the case of this example, one of the third pressurizing part and the fourth pressurizing part can be provided on this one flat surface. The other pressurizing part may be provided on a curved concave surface formed on this press die, which may be provided on another flat surface formed on the press die facing the compression side of the metal tube compressed by bending.
[0023] さらに、第 3加圧部と第 4加圧部は、前記 2個のプレス型のうち、曲げカ卩ェによって 圧縮される金属管の圧縮側と対面するプレス型だけに設けてもよぐ 2個のプレス型 の両方に設けてもよい。  [0023] Further, the third pressurizing part and the fourth pressurizing part may be provided only in the press die that faces the compression side of the metal tube compressed by the bending cage, of the two press dies. It may be provided on both of the two press dies.
[0024] 第 3加圧部と第 4加圧部を、前記 2個のプレス型のうちの曲げカ卩ェによって圧縮され る金属管の圧縮側と対面するプレス型だけに設ける場合には、残りのプレス型にお ける金属管の曲げ加工部分と対面する面は、例えば、管中心軸線に関する垂直断 面が前記円形となっている金属管のこの垂直断面と同じ曲率半径の湾曲凹面で形 成することができる。 [0024] When the third pressurizing part and the fourth pressurizing part are provided only on the press die facing the compression side of the metal tube compressed by the bending carriage of the two press dies, For example, the surface facing the bent portion of the metal tube in the remaining press mold may be perpendicular to the tube center axis. It can be formed of a curved concave surface having the same radius of curvature as this vertical cross section of the circular metal tube.
[0025] 第 3加圧部と第 4加圧部を前記 2個のプレス型の両方に設ける場合には、これらの プレス型の第 4加圧部の加圧力の前記加圧成分の大きさは異なっていてもよぐ同じ であってもよい。これらの加圧成分の大きさが同じになっていると、金属管の曲げカロ ェ部分における前記 2個のプレス型のそれぞれで扁平化される部分の断面形状を互 いに対称形状にさせて、金属管を扁平化加工することができる。  [0025] When the third pressurizing unit and the fourth pressurizing unit are provided in both of the two press molds, the magnitude of the pressurizing component of the pressurizing force of the fourth pressurizing unit of these press molds May be different or the same. If these pressure components have the same size, the cross-sectional shapes of the flattened portions of the two press dies in the bending calorie portion of the metal tube are made symmetrical to each other. The metal tube can be flattened.
[0026] また、本発明に係る金属管の扁平化加工装置は、金属管の管中心軸線方向の一 方の端面が当接し、この当接によってこの一方の端面が管中心軸線方向外側へ移 動することを規制するための端面移動規制部を有していてもよい。そして、金属管の 管中心軸線方向の他方の端部の外周面と対面する前記 2個のプレス型のそれぞれ の面は、管中心軸線に関する垂直断面が前記円形となっているこの他方の端部と同 じ曲率半径の湾曲凹面で形成し、前記 2個のプレス型による金属管の扁平化加工作 業の終了時における前記他方の端部の外周面を、これらの湾曲凹面によって囲むよ うにしてもよい。  [0026] Further, in the metal tube flattening apparatus according to the present invention, one end surface of the metal tube in the tube center axis direction abuts, and this one end surface is moved outward in the tube center axis direction by the contact. You may have an end surface movement control part for controlling moving. Each surface of the two press dies facing the outer peripheral surface of the other end portion in the tube center axis direction of the metal tube has the other end portion whose vertical section with respect to the tube center axis is the circular shape. And the outer peripheral surface of the other end at the end of the flattening operation of the metal tube by the two press dies is surrounded by these curved concave surfaces. May be.
[0027] これによると、金属管を前記 2個のプレス型で扁平化加工したときに、この扁平化加 ェによって生ずる金属管の材料の余肉のために、金属管の全長は管中心軸線方向 に沿って延びることになるが、前記端面移動規制部に金属管の管中心軸線方向の 一方の端面が当接しているため、この金属管の全長の延びは、管中心軸線方向の 他方の側への延びとなって生ずる。このように金属管の全長が管中心軸線方向の他 方の側へ延びた場合に、金属管の管中心軸線方向の前記他方の端部の外周面と 対面する前記 2個のプレス型のそれぞれの面が、管中心軸線に関する垂直断面が 前記円形となっているこの他方の端部と同じ曲率半径の湾曲凹面で形成され、前記 2個のプレス型による金属管の扁平化加工の終了時における前記他方の端部の外 周面がこれらの湾曲凹面によって囲まれていることにより、前記他方の端部が前記 2 個のプレス型で扁平化カ卩ェされることはな 、。  [0027] According to this, when the metal tube is flattened by the two press dies, the total length of the metal tube is the tube center axis because of the surplus material of the metal tube generated by the flattening process. However, since one end surface of the metal tube in the tube center axis direction is in contact with the end surface movement restricting portion, the extension of the entire length of the metal tube is the other in the tube center axis direction. It occurs as an extension to the side. In this way, when the entire length of the metal tube extends to the other side in the tube center axis direction, each of the two press dies facing the outer peripheral surface of the other end portion in the tube center axis direction of the metal tube Is formed by a curved concave surface having the same radius of curvature as the other end of which the vertical cross-section with respect to the tube center axis is circular, and at the end of flattening of the metal tube by the two press dies When the outer peripheral surface of the other end is surrounded by these curved concave surfaces, the other end is not flattened by the two press dies.
[0028] これにより、全長が所定寸法よりも大きくなつた金属管を、扁平化加工の終了後に 管中心軸線と直交する方向に移動する切断具で切断して所定寸法とするときに、扁 平化加工されていなくて前記円形の断面形状を維持している金属管の部分を切断 することが可能となるため、この切断作業を、金属管を押し潰し変形させることなく円 滑に行える。 [0028] Thus, when a metal tube having a total length larger than a predetermined dimension is cut to a predetermined dimension by cutting with a cutting tool that moves in a direction perpendicular to the tube center axis after the flattening process is finished, Since it is possible to cut the portion of the metal tube that is not flattened and maintains the circular cross-sectional shape, this cutting operation can be performed smoothly without crushing and deforming the metal tube.
[0029] このように扁平化加工装置に、金属管の管中心軸線方向の一方の端面が当接し、 この当接によってこの端面が管中心軸線方向外側へ移動することを規制するための 端面移動規制部を設ける場合には、前記 2個のプレス型のうちの少なくとも 1個のプ レス型を、型本体と、この型本体に少なくとも一部が埋め込まれた加圧型とを含んで 形成し、前記端面移動規制部を、この加圧型の少なくとも一部を埋め込むために前 記型本体に形成された立上り壁としてもよい。言い換えると、端面移動規制部を、加 圧型の少なくとも一部を埋め込むために型本体に形成した凹部や貫通孔等の立上り 壁の部分を利用して形成してもよ 、。  [0029] In this way, one end face of the metal tube in the tube center axis direction abuts on the flattening apparatus, and end face movement for restricting this end surface from moving outward in the tube center axis direction by this contact In the case of providing the restricting portion, at least one press die of the two press dies is formed including a die body and a pressure die in which at least part of the die body is embedded, The end face movement restricting portion may be a rising wall formed in the mold main body in order to embed at least a part of the pressure mold. In other words, the end face movement restricting portion may be formed by using a rising wall portion such as a recess or a through hole formed in the die body in order to embed at least a part of the pressurizing die.
[0030] また、本発明に係る金属管の扁平化加工装置は、前記 2個のプレス型で金属管を 扁平化加工するときに、この金属管の管中心軸線方向の一方の端部から金属管の 内部へこの金属管の全長の途中まで挿入される芯部材を備えて 、てよ 、。  [0030] Further, the flattening apparatus for a metal pipe according to the present invention is configured such that when the metal pipe is flattened by the two press dies, the metal pipe is metallized from one end in the pipe central axis direction of the metal pipe. Provide a core member that is inserted into the inside of the tube halfway along the entire length of the metal tube.
[0031] これによると、金属管の全長のうち、芯部材が挿入された長さ範囲について、金属 管の断面形状を、前記 2個のプレス型のプレス作用によって芯部材の形状に正確に 対応した形状に成形することができる。そして、金属管の全長のうち、芯部材が挿入 されない長さ範囲については、前記 2個のプレス型によって扁平化カ卩ェすることがで きるため、この扁平化加工装置は、前記 2個のプレス型が主要な技術的要素となって 構成され、芯部材は付随的な技術的要素となる。  [0031] According to this, the cross-sectional shape of the metal tube accurately corresponds to the shape of the core member by the pressing action of the two press dies in the length range in which the core member is inserted out of the total length of the metal tube. It can be formed into a shaped shape. The length range in which the core member is not inserted out of the total length of the metal tube can be flattened by the two press dies. Therefore, the flattening apparatus includes the two flattening apparatuses. The press mold is the main technical element, and the core member is an accompanying technical element.
[0032] 以上のように、扁平化加工装置を芯部材を備えたものとする場合には、前記 2個の プレス型のうちの一方のプレス型に、金属管に孔開け加工を行うための少なくとも 1個 のパンチ部材を設け、芯部材に、このパンチ部材をガイドするためのガイド孔を形成 してちよい。  [0032] As described above, in the case where the flattening apparatus is provided with a core member, one of the two press dies is used for drilling a metal tube. At least one punch member may be provided, and a guide hole for guiding the punch member may be formed in the core member.
[0033] これによると、芯部材を、金属管に孔開け加工する際のパンチ部材をガイドするた めのガイド部材としても利用することができる。  [0033] According to this, the core member can also be used as a guide member for guiding a punch member when drilling a metal tube.
[0034] 本発明に係る金属管の扁平化加工方法は、管中心軸線に関する垂直断面が円形 となって!/、る金属管を互いに対向する 2個のプレス型で加圧することによって前記金 属管を扁平化加工する金属管の扁平化加工方法において、前記 2個のプレス型に より、前記金属管の表面の一部となっている第 1部位をこの金属管の中心に向力つて 加圧するための第 1加圧工程と、前記 2個のプレス型のうちの少なくとも一方のプレス 型により、前記第 1部位に対して前記金属管の円周方向両側の部位であって、前記 第 1部位力 前記金属管の内側方向へずれたこの金属管の表面の第 2部位を、前記 第 1部位の側へ向力う加圧成分を生じさせて前記金属管を加圧するための第 2加圧 工程と、を含んでいることを特徴とするものである。 [0034] The metal tube flattening method according to the present invention is such that the vertical cross section with respect to the tube center axis is circular! /, And the metal tube is pressed by two press dies facing each other. In the method of flattening a metal tube for flattening a metal tube, the two press dies are used to force the first part that is a part of the surface of the metal tube toward the center of the metal tube. A first pressurizing step for pressurization and at least one of the two press dies, the parts on both sides in the circumferential direction of the metal tube with respect to the first part; 1 part force A second part for pressurizing the metal tube by generating a pressurizing component that forces the second part of the surface of the metal tube shifted toward the inside of the metal tube toward the first part. And a pressurizing step.
[0035] この扁平化加工方法によると、 2個のプレス型によって金属管の表面の一部となつ ている第 1部位をこの金属管の中心に向力つて加圧するための第 1加圧工程に引き 続いて、 2個のプレス型のうちの少なくとも一方のプレス型により、第 1部位に対して金 属管の円周方向両側の部位となっている金属管の表面の第 2部位を、第 1部位の側 へ向力う加圧成分を生じさせて加圧するための第 2加圧工程が実施され、第 2部位 は、第 1部位力 金属管の内側方向へずれたこの金属管の表面の部位となっている ため、第 2加圧部に作用する加圧力の前記加圧成分により、金属管の内側へ窪んだ 窪み部が金属管に発生することを防止しながら、この金属管を扁平化加工することが できる。 [0035] According to this flattening method, the first pressurizing step for pressurizing the first part, which is part of the surface of the metal tube by two press dies, toward the center of the metal tube Subsequently, the second part on the surface of the metal tube, which is a part on both sides in the circumferential direction of the metal pipe, with respect to the first part by at least one of the two press dies, A second pressurizing step is performed to pressurize by generating a pressurizing component directed toward the first part, and the second part is the first part force of the metal tube shifted inward of the metal tube. Since this is a surface portion, the metal component is prevented from being formed in the metal tube by the pressurizing component of the pressurizing force acting on the second pressurizing unit, while the concave portion recessed to the inside of the metal tube is prevented. Can be flattened.
[0036] そして、このように窪み部の発生を防止して金属管を扁平化加工するための作業は [0036] And the work for flattening the metal tube while preventing the occurrence of the dent in this way is
、 2個のプレス型だけを用いて金属管を 1回プレス加工するだけで終了することがで き、このため、金属管の扁平化加工作業を効率的に行える。 It can be completed by pressing the metal tube only once using only two press dies. Therefore, the flattening work of the metal tube can be performed efficiently.
[0037] また、本発明に係る金属管の扁平化加工方法には、芯部材を、金属管の管中心軸 線方向の一方の端部から金属管の内部へこの金属管の全長の途中まで挿入するた めの芯部材挿入工程を設けてもょ 、。 [0037] Further, in the method for flattening a metal tube according to the present invention, the core member is moved from one end in the tube center axis direction of the metal tube to the inside of the metal tube to the middle of the entire length of the metal tube. There should be a core member insertion process for insertion.
[0038] さらに、この扁平化加工方法には、前記 2個のプレス型のうちの一方のプレス型に 少なくとも 1個配置されていて、前記芯部材に形成されたガイド孔でガイドされるパン チ部材により、金属管に孔を開けるための孔開け工程を設けてもよい。 [0038] Furthermore, in this flattening method, a punch that is arranged in at least one of the two press dies and is guided by a guide hole formed in the core member. You may provide the drilling process for making a hole in a metal pipe with a member.
[0039] 本発明に係る金属管製品は、以上説明した本発明に係る装置又は方法によって製 造されたものである。 [0039] The metal tube product according to the present invention is manufactured by the apparatus or method according to the present invention described above.
[0040] また、以上説明した本発明は、金属管の全長、すなわち、金属管の長さ方向の全 体を扁平化加工する場合と、金属管の長さ方向の一部を扁平化加工する場合との 両方について適用することができる。また、金属管は、扁平化加工される前に、曲げ 加工や、金属管の長さ方向の一部の直径を大きくする拡径加工、金属管の長さ方向 の一部の直径を小さくする縮径カ卩ェ等の予備力卩ェが行われていてもよい。また、扁 平化加工される金属管は 1本の管によるものでもよぐ異径又は同径の複数本の管を 直列に接合したものでもよ 、。 [0040] Further, the present invention described above is the entire length of the metal tube, that is, the entire length of the metal tube. This can be applied to both the case where the body is flattened and the case where a part of the length of the metal tube is flattened. Also, before flattening the metal tube, bending, expanding the diameter of the metal tube to increase the diameter of a part of the metal tube, or reducing the diameter of a part of the metal tube in the length direction Preliminary power checks such as a reduced diameter carriage may be performed. In addition, the flattened metal tube may be a single tube, or may be a plurality of tubes with different diameters or the same diameter joined in series.
[0041] 本発明に係る装置又は方法によって扁平化加工された金属管、言 、換えると、金 属管製品は任意な用途に用いることができる。その用途の一例は、車両のブレーキ ペダル用アームであり、他の用途は、車両のサスペンションアームであり、さらに他の 用途は、二輪車のメインフレームである。  [0041] The metal pipe flattened by the apparatus or method according to the present invention, in other words, the metal pipe product can be used for any application. An example of such an application is a brake pedal arm of a vehicle, another application is a suspension arm of a vehicle, and another application is a main frame of a motorcycle.
[0042] 本発明に係る金属管製品が、車両のブレーキペダル用アームとして用いられる場 合には、このアームは、空洞部が内部に残されて扁平化加工された金属管によって 形成されている。  [0042] When the metal pipe product according to the present invention is used as an arm for a brake pedal of a vehicle, the arm is formed by a flattened metal pipe with a hollow portion left inside. .
[0043] この空洞部は、金属管の全長に渡って連続していてもよぐ金属管の全長のうちの 一部だけに設けられていてもよい。後者の場合において、金属管の全長のうち、内部 が空洞部となっていない長さ部分は、前記扁平化加工時と同時に押し潰されていて もよぐ前記扁平化加工後に行われる作業によって押し潰されていてもよい。  [0043] The hollow portion may be provided in only a part of the entire length of the metal tube which may be continuous over the entire length of the metal tube. In the latter case, the length of the entire length of the metal tube that is not a hollow portion is pushed by work performed after the flattening process, which may be crushed simultaneously with the flattening process. It may be crushed.
[0044] また、車両のブレーキペダル用アームとして用いられる金属管は、上下方向の寸法 が大きい大寸法部分と、この大寸法部分よりも上下方向の寸法が小さい小寸法部分 とを有し、大寸法部分に、ブレーキペダル用アームの回動中心軸が水平に挿入され る孔が形成されて ヽることが好ま ヽ。  [0044] In addition, a metal pipe used as a brake pedal arm of a vehicle has a large dimension part having a large vertical dimension and a small dimension part having a small vertical dimension smaller than the large dimension part. It is preferable that a hole for horizontally inserting the pivot center axis of the brake pedal arm is formed in the dimension part.
[0045] これによると、ブレーキペダル用アームには、車両を制動させるためにブレーキぺ ダルを下へ踏み込んだときの大きな荷重が作用し、この荷重によってブレーキペダル 用アームに生ずる曲げモーメントは、ブレーキペダル用アームの回動中心軸が水平 に挿入されている孔が形成された部分で最大となるが、この部分は、上下方向の寸 法が小寸法部分よりも大きい大寸法部分となっており、この大寸法部分についての 水平の中立軸に関する断面係数は、この大きな上下寸法のために大きくなつて！/、る ため、上記曲げモーメントに対するブレーキペダル用アームの強度を大きくすること ができる。 [0045] According to this, a large load acts on the brake pedal arm when the brake pedal is stepped down to brake the vehicle, and the bending moment generated in the brake pedal arm by this load is The maximum is at the part where the pivot center axis of the pedal arm is inserted horizontally, but this part is a large part where the vertical dimension is larger than the small part. The section modulus for the horizontal neutral axis for this large dimension is large because of this large vertical dimension! Therefore, increase the strength of the brake pedal arm against the above bending moment. Can do.
[0046] このようにブレーキペダル用アームに、上下方向の寸法が大きい大寸法部分と、こ の大寸法部分よりも上下方向の寸法が小さい小寸法部分とを設け、大寸法部分に、 ブレーキペダル用アームの回動中心軸が水平に挿入される孔が形成する場合には  [0046] As described above, the brake pedal arm is provided with a large dimension part having a large vertical dimension and a small dimension part having a small vertical dimension smaller than the large dimension part. When a hole is formed in which the pivot axis of the arm is inserted horizontally
、大寸法部分の左右方向に対面する 2個の面は、互いに平行となった平坦面として もよぐ外側へ湾曲等して突出した突出面となっていてよい。 In addition, the two surfaces facing the left and right direction of the large dimension portion may be projecting surfaces that are curved outward and may protrude as flat surfaces that are parallel to each other.
[0047] 大寸法部分の左右方向に対面する 2個の面を互いに平行となった平坦面とした場 合には、これら 2個の面を外側へ湾曲等させて突出させた突出面とした場合よりも、 大寸法部分の上下方向の寸法を大きくできるため、この大寸法部分についての前記 断面係数も大きくできる。 [0047] When the two surfaces facing the left and right direction of the large dimension portion are flat surfaces that are parallel to each other, the two surfaces are made to project by curving outward or the like. Since the dimension in the vertical direction of the large dimension portion can be increased as compared with the case, the section modulus of the large dimension portion can be increased.
[0048] 大寸法部分の左右方向に対面する 2個の面を、外側へ湾曲等させて突出させた突 出面とした場合には、この大寸法部分を、金属管の内部に挿入される芯部材を用い ることなく、 2個のプレス型による扁平化カ卩ェによって成形することができる。 [0048] In the case where the two surfaces facing the left and right direction of the large dimension portion are projected surfaces that are curved and projected outward, the large dimension portion is inserted into the core inserted into the metal tube. Without using any members, it can be formed by a flattening cage using two press dies.
発明の効果  The invention's effect
[0049] 本発明によると、上下型等の 2個のプレス型だけにより、又は 2個のプレス型を主要 な技術的要素にして、金属管を窪み部が発生することなく扁平化加工できるようにな るという効果を得られる。  [0049] According to the present invention, it is possible to flatten a metal tube without generating a recess by using only two press dies such as an upper die and the like, or using two press dies as main technical elements. The effect of becoming
図面の簡単な説明  Brief Description of Drawings
[0050] [図 1]図 1は、本発明の第 1実施形態に係る 2個のプレス型となっている上下型の部分 を示す扁平化加工装置の断面図である。  FIG. 1 is a cross-sectional view of a flattening apparatus showing upper and lower mold parts that are two press molds according to a first embodiment of the present invention.
[図 2]図 2は、図 1の S2— S2線断面図である。  [FIG. 2] FIG. 2 is a cross-sectional view taken along line S2-S2 of FIG.
[図 3]図 3は、図 2の上下型で金属管が扁平化加工されたときを示す断面図である。  FIG. 3 is a cross-sectional view showing a case where a metal tube is flattened in the upper and lower molds of FIG.
[図 4]図 4は、第 2実施形態を示す図 2と同様の図である。  FIG. 4 is a view similar to FIG. 2 showing the second embodiment.
[図 5]図 5は、第 2実施形態の図 3と同様の図である。  FIG. 5 is a view similar to FIG. 3 of the second embodiment.
[図 6]図 6は、上下型が金属管を曲げ加工する型になっている第 3実施形態を示す図 1と同様の図である。  FIG. 6 is a view similar to FIG. 1 showing a third embodiment in which the upper and lower molds are molds for bending metal pipes.
[図 7]図 7は、金属管の非曲げカ卩ェ部分の位置となっている図 6の S7— S7線位置で の金属管の扁平化加工時を示す断面図である。 [図 8]図 8は、金属管の曲げカ卩ェ部分の位置となっている図 6の S8— S8線位置での 金属管の扁平化加工時を示す断面図である。 [FIG. 7] FIG. 7 is a cross-sectional view of the metal tube during flattening at the position S7-S7 in FIG. 6, which is the position of the non-bending portion of the metal tube. [FIG. 8] FIG. 8 is a cross-sectional view of the metal tube during flattening at the position S8-S8 in FIG. 6, which is the position of the bent portion of the metal tube.
[図 9]図 9は、上下型が金属管を曲げ加工する型になっていて、加圧型の加圧面が 複数の平坦面で形成されている第 4実施形態を示す図 7と同様の図である。  [Fig. 9] Fig. 9 is a view similar to Fig. 7 showing a fourth embodiment in which the upper and lower molds are molds for bending a metal tube, and the pressurizing surface of the pressurizing mold is formed of a plurality of flat surfaces. It is.
[図 10]図 10は、第 4実施形態の図 8と同様の図である。 FIG. 10 is a view similar to FIG. 8 of the fourth embodiment.
[図 11]図 11は、第 5実施形態で用 、られる金属管の扁平化加工前を示す斜視図で ある。  FIG. 11 is a perspective view showing a metal tube used in the fifth embodiment before flattening.
[図 12]図 12は、図 11の金属管の扁平化力卩ェ後を示す斜視図である。  FIG. 12 is a perspective view showing a state after the flattening force of the metal tube in FIG.
[図 13]図 13は、第 5実施形態に係る 2個のプレス型となっている上下型の部分を示 す扁平化加工装置の要部断面図である。  FIG. 13 is a cross-sectional view of the main part of the flattening apparatus showing the upper and lower mold parts that are two press molds according to the fifth embodiment.
[図 14]図 14は、図 13の S 14— S 14線矢視図である。  FIG. 14 is a view taken in the direction of arrows S 14-S 14 in FIG.
[図 15]図 15は、金属管を扁平化加工した後の第 5実施形態の扁平化加工装置の要 部断面図である。  FIG. 15 is a cross-sectional view of a principal part of a flattening device of a fifth embodiment after flattening a metal tube.
[図 16]図 16は、第 6実施形態を示す図 15と同様の図である。  FIG. 16 is a view similar to FIG. 15 showing the sixth embodiment.
[図 17]図 17は、第 6実施形態の扁平化加工装置で製造された金属管製品カゝら作ら れる車両のブレーキペダル用アームと、このアームに取り付けられたブレーキペダル とを示す平面図である。 FIG. 17 is a plan view showing a brake pedal arm of a vehicle manufactured by a metal pipe product manufactured by the flattening apparatus of the sixth embodiment and a brake pedal attached to the arm. It is.
[図 18]図 18は、図 17のブレーキペダル用アームとブレーキペダルとを示す側面図で ある。  FIG. 18 is a side view showing the brake pedal arm and the brake pedal of FIG.
[図 19]図 19は、図 18の S19— S19線断面図である。  FIG. 19 is a sectional view taken along line S19—S19 in FIG.
[図 20]図 20は、図 18の S20— S20線断面図である。 FIG. 20 is a cross-sectional view taken along line S20—S20 in FIG.
[図 21]図 21は、別実施形態に係るブレーキペダル用アームを示す図 20と同様の図 である。  FIG. 21 is a view similar to FIG. 20, showing a brake pedal arm according to another embodiment.
[図 22]図 22は、加圧面が平坦面となっている上下型で金属管を扁平化加工する場 合における加圧前を示す断面図である。  [FIG. 22] FIG. 22 is a cross-sectional view showing a state before pressurization when a metal tube is flattened by an upper and lower mold in which a pressurization surface is a flat surface.
[図 23]図 23は、図 22の上下型で金属管を扁平化加工したときを示す断面図である。 符号の説明  FIG. 23 is a cross-sectional view showing a case where a metal tube is flattened with the upper and lower molds of FIG. Explanation of symbols
1, 31, 71 金属管 1A, IB, 31 A, 31B 第 1部位 1, 31, 71 Metal tube 1A, IB, 31 A, 31B 1st part
1C、 ID, 31C, 31D 第 2部位  1C, ID, 31C, 31D Second part
3 IE, 3 IF 第 3部位  3 IE, 3 IF 3rd part
31G, 31H 第 4部位  31G, 31H 4th part
50, 53, 80, 83  50, 53, 80, 83
51, 54, 81, 84  51, 54, 81, 84
52, 55, 82, 85  52, 55, 82, 85
12A, 15A, 42A, 45A, 82 A, 85A 湾曲凹面で形成された加圧面  12A, 15A, 42A, 45A, 82A, 85A Pressurized surface formed by curved concave surface
22A, 25A, 52A, 55A 平坦面で形成された加圧面  22A, 25A, 52A, 55A Pressurized surface formed of flat surface
26, 27, 28, 29, 56, 57, 58, 59, 60, 61, 62, 63 平坦面  26, 27, 28, 29, 56, 57, 58, 59, 60, 61, 62, 63 Flat surface
71 ' 扁平化加工後の金属管である金属管製品  71 '' Metal tube product, flattened metal tube
72A 管中心軸線方向の一方の側の端面  72A End face on one side in the tube center axis direction
73A 管中心軸線方向の他方の側の端部  73A End on the other side of the tube center axis
84B 端面移動規制部である立上り壁  84B Rise wall as end face movement restriction part
90 芯部材  90 core material
90A, 90B, 90C ガイド孔  90A, 90B, 90C Guide hole
92, 93, 94 ノ ンチ部材  92, 93, 94 inch parts
100 ブレーキペダル用アーム  100 Brake pedal arm
101, 101 ' 大寸法部分  101, 101 'large dimension part
102 小寸法部分  102 Small dimension part
N , N , N 管中心軸線  N, N, N tube center axis
1 2 3  one two Three
発明を実施するための最良の形態 BEST MODE FOR CARRYING OUT THE INVENTION
以下に本発明を実施するための形態を図面に基づいて説明する。図 1は、第 1実 施形態に係る金属管の扁平化加工装置となっているプレス装置の上下型 10, 13の 部分を示す断面図である。 2個のプレス型であるこれらの上下型 10, 13は、型本体 1 1, 14と、これらの型本体 11, 14に形成された凹部 11A, 14Aに全体が埋め込みセ ットされた加圧型 12, 15とを備えている。この実施形態に係る金属管 1は、管中心軸 線 Nが真っ直ぐとなっていて、同じ直径が全長に渡って連続している直管であり、ま た、この金属管 1は、図 1の S2— S2線断面図である図 2で示されているとおり、管中 心軸線 Nに関する垂直断面が円形となっている円管である。 EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. FIG. 1 is a cross-sectional view showing portions of upper and lower molds 10 and 13 of a press device that is a flattening device for a metal tube according to the first embodiment. These upper and lower dies 10, 13 which are two press dies are the press dies, which are embedded in the mold bodies 11 and 14 and the recesses 11A and 14A formed in the mold bodies 11 and 14, respectively. 12 and 15. The metal pipe 1 according to this embodiment is a straight pipe in which the pipe center axis N is straight and the same diameter is continuous over the entire length. The metal tube 1 is a circular tube having a circular vertical cross section with respect to the tube center axis N as shown in FIG. 2 which is a cross-sectional view taken along line S2-S2 of FIG.
[0053] 図 2で示されているように、上下型 10, 13の加圧型 12, 15における金属管 1と対面 する面、言い換えると、金属管 1を加圧するための加圧面 12A, 15Aは、湾曲凹面と なっており、これらの湾曲凹面は円弧面であって、金属管 1の上記円形の垂直断面 の曲率半径よりも大きい曲率半径で形成されている。そして、これらの加圧面 12Aと 1 5Aの曲率半径は同じである。金属管 1は、図 1で示されているように、上下型 10, 13 が型開きしているときに下型 13の加圧型 15の加圧面 15A上にセットされ、下降した 上型 10の型本体 11が下型 13の型本体 14と当接する所定位置まで達することにより 、金属管 1は、図 3で示されているように、加圧型 12, 15で扁平化加工される。  [0053] As shown in FIG. 2, the surfaces of the upper and lower molds 10, 13 facing the metal tube 1, in other words, the pressurizing surfaces 12A, 15A for pressurizing the metal tube 1 are: These curved concave surfaces are arcuate surfaces and are formed with a radius of curvature larger than the radius of curvature of the circular vertical cross section of the metal tube 1. The radii of curvature of these pressing surfaces 12A and 15A are the same. As shown in FIG. 1, the metal tube 1 is set on the pressing surface 15A of the pressing mold 15 of the lower mold 13 when the upper and lower molds 10, 13 are opened, and the upper mold 10 is lowered. When the mold body 11 reaches a predetermined position where it comes into contact with the mold body 14 of the lower mold 13, the metal tube 1 is flattened by the pressurizing molds 12 and 15 as shown in FIG.
[0054] この扁平化カ卩ェは、最初に、金属管 1の表面の一部となっている図 2及び図 3の水 平方向中央部の最高部位 1Aと最低部位 1B力 言い換えると、第 1部位 1A, 1Bが 加圧型 12, 15のカロ圧面 12A, 15Aで金属管 1の中心に向かって加圧されることによ り開始され、上型 10が引き続いて下降することにより、上型 10では、第 1部位 1Aに 対して金属管 1の円周方向両側の金属管 1の表面の部位となっている第 2部位 1Cが 加圧型 12の加圧面 12Aで加圧されるとともに、下型 13では、第 1部位 1Bに対して金 属管 1の円周方向両側の部位となっている第 2部位 1Dが加圧型 15の加圧面 15Aで 加圧される。  [0054] This flattening cache is first a part of the surface of the metal tube 1, and the force of the highest part 1A and the lowest part 1B in the horizontal center part of Figs. 1 part 1A, 1B is started by pressing toward the center of the metal tube 1 with the pressurizing surfaces 12A, 15A of the pressurizing dies 12, 15, and the upper die 10 is continuously lowered to 10, the second part 1C, which is the part of the surface of the metal tube 1 on both sides in the circumferential direction of the metal tube 1 with respect to the first part 1A, is pressed by the pressing surface 12A of the pressurizing die 12 and In the mold 13, the second part 1 </ b> D, which is a part on both sides in the circumferential direction of the metal pipe 1, is pressed against the first part 1 </ b> B by the pressurizing surface 15 </ b> A of the pressurizing mold 15.
[0055] このようにして金属管 1が加圧型 12, 15で扁平化カ卩ェされる際には、図 3で示され ているとおり、金属管 1の第 1部位 1A, 1Bには、金属管 1の中心に向力う鉛直の加圧 力 Fが作用し、金属管 1の第 2部位 1C, 1Dには、加圧面 12A, 15Aの曲率半径に 対応して斜めの向きとなった加圧力 Fが作用する。これらの加圧力 Fは、加圧力 F  [0055] When the metal tube 1 is flattened by the pressure molds 12 and 15 in this way, as shown in FIG. 3, the first portions 1A and 1B of the metal tube 1 A vertical pressing force F directed toward the center of the metal tube 1 is applied, and the second portions 1C and 1D of the metal tube 1 are inclined according to the radii of curvature of the pressing surfaces 12A and 15A. Pressure F is applied. These applied forces F are
2 2 1 によって加圧される第 1部位 1A, 1Bの側へ向かう水平方向の加圧成分 F を有して  2 2 1 Pressurized component F in the horizontal direction toward the first part 1A, 1B
2H いる。また、加圧面 12A, 15Aのうち、上記加圧力 Fを発生させる部分は、上型 10 が下降を開始した後に最初に金属管 1の第 1部位 1A, 1Bを加圧する第 1加圧部とな つており、加圧面 12A, 15Aのうち、それぞれの第 1加圧部 1A, 1Bを間に挟んで金 属管 1の円周方向両側にあって、上記加圧力 Fを発生させる部分は、その次に金属  2H. The portion of the pressurizing surfaces 12A and 15A that generates the pressure F is a first pressurizing unit that pressurizes the first parts 1A and 1B of the metal tube 1 after the upper mold 10 starts to descend. The portions of the pressure surfaces 12A and 15A that generate the pressure F on both sides of the metal tube 1 in the circumferential direction with the first pressure portions 1A and 1B interposed therebetween are as follows: Then metal
2  2
管 1を加圧する第 2加圧部となっている。第 2加圧部の位置は、上型 10の下降が進 行するにしたカ^、、第 1部位 1A, 1Bから金属管 1の円周方向へ離れる位置へ移行 する。 This is the second pressurizing part that pressurizes the tube 1. As for the position of the 2nd pressurizing part, the lowering of the upper mold 10 progresses. Move to the position away from the first part 1A, 1B in the circumferential direction of the metal tube 1 from the first part 1A, 1B.
[0056] 以上のように金属管 1が加圧型 12, 15で加圧されたときには、図 22の場合と同様 に、金属管 1における加圧型 12, 15で加圧される円周方向長さは、これらの円周方 向長さが当接する加圧型 12, 15の加圧面 12A, 15Aの箇所の長さよりも長いために 、それぞれの第 1部位 1A, 1Bを間に挟んだ金属管 1の円周方向両側において、図 2 3の場合と同様に、第 1部位 1A、 IBの側へ向力う圧縮方向の荷重が生ずることにな る。しかし、金属管 1には、それぞれの第 1部位 1A, 1Bに対して金属管 1の円周方向 両側の部位となっている第 2部位 1C, 1Dにおいて、上記加圧力 Fが作用し、これら  [0056] When the metal tube 1 is pressurized with the pressurizing dies 12, 15 as described above, the circumferential length of the metal tube 1 pressurized with the pressurizing dies 12, 15 is the same as in FIG. Is longer than the length of the pressurizing surfaces 12A and 15A of the pressurizing dies 12 and 15 in contact with each other in the circumferential direction, so that the metal pipes 1 sandwiching the first portions 1A and 1B therebetween. As in the case of FIG. 23, a load in the compressive direction is generated on both sides in the circumferential direction of the first portion 1A and IB. However, the pressure F acts on the metal pipe 1 at the second parts 1C and 1D which are the parts on both sides in the circumferential direction of the metal pipe 1 with respect to the first parts 1A and 1B.
2  2
の加圧力 Fは、第 1部位 1A, 1Bの側へ向かう加圧成分 F を有しており、また、第 2  The pressurizing force F has a pressurizing component F toward the first parts 1A and 1B, and the second part
2 2H  2 2H
部位 1C, 1Dは、第 1部位 1A, 1Bから金属管 1の内側方向へずれた金属管 1の表面 の部位となっているため、第 2部位 1Cに作用する加圧力 Fの加圧成分 F により、金  Since the parts 1C and 1D are the parts of the surface of the metal tube 1 shifted from the first parts 1A and 1B toward the inside of the metal pipe 1, the pressurizing component F of the pressure F acting on the second part 1C By the gold
2 2H 属管 1の最高部位となっている第 1部位 1Aは加圧面 12A側へ押し上げられ、第 2部 位 1Dに作用する加圧力 Fの加圧成分 F により、金属管 1の最低部位となっている  2 2H The first part 1A, which is the highest part of the genus pipe 1, is pushed up to the pressing surface 12A side, and the pressurizing component F of the pressurizing force F acting on the second part 1D becomes the lowest part of the metal pipe 1. Has become
2 2H  2 2H
第 1部位 1Bは加圧面 15A側へ押し下げられる。このため、金属管 1は、金属管 1の 内側へ窪んだ窪み部が発生することなく扁平化加工されることになる。  The first part 1B is pushed down to the pressure surface 15A side. For this reason, the metal tube 1 is flattened without generating a hollow portion that is recessed toward the inside of the metal tube 1.
[0057] したがって、本実施形態によると、互いに上下に対向する 2個のプレス型となってい る上下型 10, 13に、金属管 1を加圧する加圧面 12A, 15Aを湾曲凹面とした加圧型 12, 15を設けるだけで、金属管 1を、窪み部が発生することなく所定厚さ寸法まで扁 平化加工することができ、プレス装置には特別の部材、機器類を装備する必要がな いため、プレス装置全体の製造コスト及び金属管 1の扁平化加工コストを低減できる [0057] Therefore, according to the present embodiment, the pressing molds 12A and 15A that pressurize the metal tube 1 are curved concave surfaces on the upper and lower molds 10, 13 that are two press molds facing each other vertically. By simply providing 12 and 15, the metal tube 1 can be flattened to a predetermined thickness without the formation of a dent, and the press device does not need to be equipped with special members or equipment. Therefore, it is possible to reduce the manufacturing cost of the entire pressing device and the flattening cost of the metal tube 1
[0058] また、 1個の金属管 1についての扁平化加工作業は、上型 10が下型 13に対して 1 回上下動するだけで終了するため、この扁平化加工作業を効率的に行え、短時間で 多数の金属管 1を加工処理できることになる。 [0058] In addition, the flattening work for one metal tube 1 is completed only by moving the upper die 10 up and down once relative to the lower die 13, so that the flattening work can be performed efficiently. Thus, a large number of metal pipes 1 can be processed in a short time.
[0059] また、本実施形態では、上下型 10, 13に分かれて配置されている加圧型 12, 15 の加圧面 12A, 15Aは、同じ曲率半径の湾曲凹面となっているため、金属管 1を、管 中心軸線 Nに関する上下部分であって加圧面 12A, 15Aで成形される部分を対称 形状にさせて、扁平化加工できることになる。 In the present embodiment, the pressurizing surfaces 12A and 15A of the pressurizing dies 12 and 15 arranged separately in the upper and lower molds 10 and 13 are curved concave surfaces having the same radius of curvature. The upper and lower parts of the tube center axis N are symmetrical with the parts formed by the pressure surfaces 12A and 15A. The shape can be flattened.
[0060] 図 4及び図 5は、第 2実施形態に係る上下型 20, 23を示す。この実施形態でも、上 下型 20, 23は、型本体 21, 24と、これらの型本体 21, 24に形成された凹部 21A, 2 4Aに全体が埋め込みセットされた加圧型 22, 25とを備えている力 これらの加圧型 22, 25のカロ圧面 22A, 25Aは湾曲凹面で形成されておらず、金属管 1の水平の直 径方向中央の第 1平坦面 26, 28と、これらの第 1平坦面 26, 28に対して金属管 1の 水平の直径方向両側、言い換えると、金属管 1の円周方向両側に設けられた第 2平 坦面 27, 29とで形成されている。上型 20の加圧型 22の第 2平坦面 27は、第 1平坦 面 26から下り傾斜で傾いた傾斜面となっており、下型 23の加圧型 25の第 2平坦面 2 9は、第 1平坦面 28から上り傾斜で傾いた傾斜面となっている。  4 and 5 show the upper and lower molds 20, 23 according to the second embodiment. Also in this embodiment, the upper and lower molds 20, 23 include mold bodies 21, 24, and pressurization molds 22, 25 that are embedded and set in the recesses 21A, 24A formed in these mold bodies 21, 24. The force provided The caloric pressure surfaces 22A and 25A of these pressurizing dies 22 and 25 are not formed as curved concave surfaces, and the first flat surfaces 26 and 28 in the center of the horizontal diameter of the metal tube 1 and their first It is formed by the second flat surfaces 27 and 29 provided on both sides in the horizontal diameter direction of the metal tube 1 with respect to the flat surfaces 26 and 28, in other words, on both sides in the circumferential direction of the metal tube 1. The second flat surface 27 of the pressing mold 22 of the upper mold 20 is an inclined surface inclined downward from the first flat surface 26, and the second flat surface 29 of the pressing mold 25 of the lower mold 23 is 1It is an inclined surface inclined upward from the flat surface 28.
[0061] この実施形態では、上型 20が下型 23に向かって下降すると、最初に、金属管 1の 最高部位、最低部位となっている第 1部位 1A、 IBが加圧面 22A, 25Aの第 1平坦 面 26, 28で金属管 1の中心に向力つて加圧され、次に、上型 20では、第 1部位 1A に対して金属管 1の円周方向両側の部位となっている第 2部位 1Cが加圧面 22Aの 第 2平坦面 27で加圧されるとともに、下型 23では、第 1部位 1Bに対して金属管 1の 円周方向両側の部位となっている第 2部位 1Dが加圧面 25Aの第 2平坦面 29で加圧 される。この加圧状態が図 5で示されている。  [0061] In this embodiment, when the upper die 20 is lowered toward the lower die 23, first, the first portion 1A, which is the highest portion and the lowest portion of the metal tube 1, and IB are the pressure surfaces 22A, 25A. The first flat surfaces 26 and 28 are pressurized against the center of the metal tube 1 and then the upper mold 20 is located on both sides of the metal tube 1 in the circumferential direction with respect to the first region 1A. The second part 1C is pressurized by the second flat surface 27 of the pressure surface 22A, and in the lower mold 23, the second part is a part on both sides in the circumferential direction of the metal tube 1 with respect to the first part 1B. 1D is pressed by the second flat surface 29 of the pressing surface 25A. This pressure state is shown in FIG.
[0062] このため、この実施形態では、加圧面 22A, 25Aの第 1平坦面 26, 28には、金属 管 1を最初に加圧する第 1加圧部が存在し、加圧面 22A, 25Aの第 2平坦面 27, 29 には、第 1加圧部を挟んで金属管 1の円周方向両側にあって、金属管 1を次に加圧 する第 2加圧部が存在している。また、第 1加圧部で加圧される第 1部位 1A, 1Bには 、金属管 1の中心に向力う鉛直の加圧力 Fが作用し、第 2加圧部で加圧される第 2部  [0062] Therefore, in this embodiment, the first flat surfaces 26, 28 of the pressurizing surfaces 22A, 25A include the first pressurizing unit that pressurizes the metal tube 1 first, and the pressurizing surfaces 22A, 25A On the second flat surfaces 27 and 29, there are second pressurizing portions on both sides in the circumferential direction of the metal tube 1 across the first pressurizing portion and pressurizing the metal tube 1 next. In addition, the vertical pressure F acting toward the center of the metal tube 1 acts on the first parts 1A and 1B pressurized by the first pressurizing part, and the first parts 1A and 1B are pressurized by the second pressurizing part. 2 parts
3  Three
位 1C, 1Dには、第 2平坦面 27, 29の傾斜角度に対応して斜めの向きとなった加圧 力 Fが作用する。これらの加圧力 Fは、第 1部位 1A, 1Bの側へ向力う水平方向の At the positions 1C and 1D, a pressing force F that is inclined according to the inclination angle of the second flat surfaces 27 and 29 acts. These applied forces F are applied in the horizontal direction toward the first parts 1A and 1B.
4 4 4 4
加圧成分 F を有しており、そして、前述した実施形態と同じぐ第 2部位 1C, 1Dは、  The second portion 1C, 1D having the pressurizing component F and the same as the above-described embodiment is
4H  4H
第 1部位 1A, 1B力 金属管 1の内側方向へずれている。  1st part 1A, 1B force It has shifted to the inner side of metal tube 1.
[0063] このため、この実施形態でも、加圧力 Fの加圧成分 F により、金属管 1を、金属管 [0063] Therefore, also in this embodiment, the metal tube 1 is connected to the metal tube by the pressurizing component F of the pressurizing force F.
4 4H  4 4H
1の内側へ窪んだ窪み部が発生することなく扁平化加工することができる。 [0064] また、この実施形態によると、上下型 20, 23のカロ圧型 22, 25のカロ圧面 22A, 25A を第 1平坦面 26, 28と第 2平坦面 27, 29の組み合わせで形成でき、加圧型 22, 25 にこれらの平坦面 26, 27, 28, 29を形成するための作業は、加圧型に湾曲凹面を 形成するための作業よりも容易であるため、加圧型 22, 25を容易に製造することが できる。 Flattening can be performed without the formation of a recess that is recessed toward the inside of 1. [0064] According to this embodiment, the upper and lower molds 20, 23 can be formed by a combination of the first flat surfaces 26, 28 and the second flat surfaces 27, 29. The work for forming these flat surfaces 26, 27, 28, 29 on the pressure dies 22, 25 is easier than the work for forming the curved concave surface on the pressure dies. Can be manufactured.
[0065] 図 6は第 3実施形態を示す。この実施形態の上下型 40, 43も、型本体 41, 44と、こ れらの型本体 41, 44に形成された凹部 41A, 44Aに埋め込みセットされた加圧型 4 2, 45とを備えている力 これらの加圧型 42, 45は、金属管 31を曲げ加工するため の山咅 谷咅 を備えている。このため、カロ圧型 42, 45は、四咅 44Aに埋 め込まれた部分と、凹部 41A, 44Aから露出している部分とを有する。  FIG. 6 shows a third embodiment. The upper and lower molds 40, 43 of this embodiment also include mold bodies 41, 44 and pressure molds 4, 2, 45 embedded and set in recesses 41A, 44A formed in these mold bodies 41, 44. Forces These pressure dies 42 and 45 are provided with ridges and valleys for bending the metal tube 31. For this reason, the calo pressure molds 42 and 45 have portions embedded in the four corners 44A and portions exposed from the recesses 41A and 44A.
[0066] 図 7は、金属管 31における曲げカ卩ェされない非曲げカ卩ェ部分の位置となっている 図 6の S7— S7線位置での金属管 31の扁平化力卩ェ時を示す断面図であり、図 8は、 金属管 31における曲げカ卩ェされる曲げカ卩ェ部分の位置となっている図 6の S8— S8 線位置での金属管 31の扁平化加工時を示す断面図である。これらの図 7と図 8で示 されているように、上下型 40, 43の加圧型 42, 45における金属管 31と対面する面と なっている加圧面 42A, 45Aは、図 2及び図 3の実施形態と同様に、湾曲凹面となつ ている。これらの湾曲凹面は、扁平化加工される前の金属管 31の管中心軸線 N (図  [0066] FIG. 7 shows the flattening force of the metal pipe 31 at the position S7—S7 in FIG. FIG. 8 is a cross-sectional view of the metal tube 31 at the position S8-S8 line in FIG. 6 where the bent portion of the metal tube 31 is bent and bent. It is sectional drawing. As shown in FIGS. 7 and 8, the pressing surfaces 42A and 45A facing the metal tube 31 in the pressing dies 42 and 45 of the upper and lower dies 40 and 43 are shown in FIGS. Similar to the embodiment, the curved concave surface is formed. These curved concave surfaces are formed in the tube center axis N of the metal tube 31 before being flattened (see Fig.
2 2
6を参照）に関する円形の垂直断面の曲率半径よりも大きい曲率半径で形成されて いる。 6)) with a radius of curvature greater than the radius of curvature of the circular vertical section.
[0067] そして、図 7と図 8との比較で分力るように、金属管 31の曲げカ卩ェ部分と対応する部 分での加圧面 42A, 45Aの曲率半径は、金属管 31の非曲げカ卩ェ部分と対応する部 分での加圧面 42A, 45Aの曲率半径よりも小さくなつている。このように曲率半径が 曲げカ卩ェ部分と非曲げカ卩ェ部分とで異なっている加圧面 42A, 45Aは、滑らかに連 続する面として加圧型 42, 45に形成されている。  [0067] Then, as shown in FIG. 7 and FIG. 8, the radius of curvature of the pressing surfaces 42A and 45A at the portion corresponding to the bent portion of the metal tube 31 is equal to that of the metal tube 31. It is smaller than the radius of curvature of the pressure surfaces 42A and 45A at the part corresponding to the non-bending carriage part. Thus, the pressing surfaces 42A and 45A having different radii of curvature in the bent and non-bent casing portions are formed in the pressing dies 42 and 45 as smoothly connecting surfaces.
[0068] なお、この実施形態の金属管 31は、図 6で示されているように、予め実施された予 備曲げ加工によって管中心軸線 Nが少し曲がった曲管となっている力 この実施形  [0068] It should be noted that the metal tube 31 of this embodiment is a force in which the tube center axis N is bent slightly by a pre-bending process as shown in FIG. Shape
2  2
態で曲げ加工されながら扁平化加工される金属管は、予備曲げ加工されていない直 管でもよい。 [0069] この実施形態では、上型 40が下型 43に向かって下降すると、図 7で示されている 金属管 31の非曲げ加工部分では、この非曲げ加工部分での金属管 31の最高部位 と最低部位になっている第 1部位 31A, 31B力 加圧型 42, 45の加圧面 42A, 45A 力 の加圧力 Fで金属管 31の中心に向力つて加圧され、次いで第 1部位 31A, 31 The metal pipe that is flattened while being bent in the state may be a straight pipe that has not been pre-bent. [0069] In this embodiment, when the upper die 40 is lowered toward the lower die 43, the unbent portion of the metal tube 31 shown in FIG. 1st part 31A, 31B force that is the lowest part and the part 1st part 31A, pressurizing face 42A, 45B pressure surface 42A, 45A force is applied to the center of the metal tube 31 with force F , 31
5  Five
Bに対して金属管 31の円周方向両側の部位となっている第 2部位 31C、 31Dが、加 圧型 42, 45のカロ圧面 42A, 45Aからの加圧力 Fで加圧される。また、図 8で示され  The second parts 31C and 31D which are parts on both sides in the circumferential direction of the metal pipe 31 with respect to B are pressurized with the pressure F from the caloric pressure surfaces 42A and 45A of the pressure dies 42 and 45. Also shown in Figure 8
6  6
ている金属管 31の曲げ加工部分でも、この曲げ加工部分での金属管 31の最高部位 と最低部位になっている第 3部位 31E, 31Fが、加圧型 42, 45の加圧面 42A, 45A 力 の加圧力 Fで金属管 31の中心に向力つて加圧され、次いで、第 3部位 31E, 31 Fに対して金属管 31の円周方向両側の部位となっている第 4部位 31G, 31Hが、加 圧型 42, 45の加圧面 42A, 45Aからの加圧力 Fで加圧される。  Even in the bent part of the metal pipe 31, the third part 31E, 31F which is the highest part and the lowest part of the metal pipe 31 in this bent part is the pressure surface 42A, 45A force of the pressure dies 42, 45 The fourth part 31G, 31H, which is the part on both sides in the circumferential direction of the metal tube 31 with respect to the third part 31E, 31 F However, the pressure is applied by the pressure F from the pressure surfaces 42A and 45A of the pressure dies 42 and 45.
8  8
[0070] このため、金属管 31の非曲げカ卩ェ部分と対応する加圧面 42A, 45Aの部分には、 金属管 31を加圧力 Fで加圧する第 1加圧部と、加圧力 Fで加圧する第 2加圧部とが  [0070] Therefore, the pressurizing surfaces 42A and 45A corresponding to the non-bending portion of the metal pipe 31 are provided with a first pressurizing unit that pressurizes the metal pipe 31 with the pressurizing force F, and with the pressurizing force F. The second pressurizing part to pressurize
5 6  5 6
存在し、また、金属管 31の曲げ加工部分と対応する加圧面 42A, 45Aの部分には、 金属管 31を加圧力 Fで加圧する第 3加圧部と、加圧力 Fで加圧する第 4加圧部とが  In addition, there are a third pressurizing part that pressurizes the metal tube 31 with the pressurizing force F and a fourth pressurizing unit that pressurizes with the pressurizing force F on the pressurizing surfaces 42A and 45A corresponding to the bent portion of the metal tube 31. Pressurization part
7 8  7 8
存在する。  Exists.
[0071] そして、第 2部位 31C, 31Dは、第 1部位 31A, 31B力 金属管 1の内側方向へず れており、第 4部位 31G, 31Hは、第 3部位 31E, 31Fから金属管 1の内側方向へず れている。  [0071] The second parts 31C and 31D are displaced inwardly of the first part 31A and 31B force metal tube 1, and the fourth parts 31G and 31H are connected to the metal pipe 1 from the third parts 31E and 31F. It is shifted inward.
[0072] この実施形態でも、第 2加圧部の加圧力 Fと第 4加圧部の加圧力 Fは、加圧面 42  [0072] Also in this embodiment, the pressurizing force F of the second pressurizing unit and the pressurizing force F of the fourth pressurizing unit are equal to the pressurizing surface 42.
6 8  6 8
A, 45Aの曲率半径に応じた斜めの加圧力となるため、加圧力 Fは、第 1部位 31A,  Since the applied pressure is oblique according to the radius of curvature of A and 45A, the applied pressure F is the first part 31A,
6  6
31Bの側へ向かう加圧成分 F を有し、加圧力 Fは、第 3部位 31E， 31Fの側へ向  It has a pressurizing component F toward 31B, and the applied pressure F is directed toward the third part 31E, 31F.
6H 8  6H 8
力 加圧成分 F を有する。そして、上述したように、金属管 31の曲げ加工部分と対  Force Has pressurizing component F. As described above, the bent portion of the metal tube 31 is matched with the bent portion.
8H  8H
応する部分での加圧面 42A, 45Aの曲率半径は、金属管 31の非曲げカ卩ェ部分と対 応する部分での加圧面 42A, 45Aの曲率半径よりも小さいため、加圧力 Fの加圧成  The radius of curvature of the pressurizing surfaces 42A and 45A at the corresponding part is smaller than the radius of curvature of the pressurizing surfaces 42A and 45A at the part corresponding to the non-bending curve part of the metal tube 31, so Formation
8  8
分 F は、加圧力 Fの加圧成分 F よりも大きくなつている。  The fraction F is larger than the pressurizing component F of the applied pressure F.
8H 6 6H  8H 6 6H
[0073] 図 6において、金属管 31は上下型 40, 43の加圧型 42, 45で下側へ凸形状となつ て曲げ加工されるため、金属管 31の曲げ加工部分における上型 40の加圧型 42と対 面する上側の部分 49は、曲げ加工によって管中心軸線 Nの方向へ圧縮される圧縮 [0073] In FIG. 6, the metal pipe 31 is bent downward by the upper and lower molds 40, 43 with the pressing dies 42, 45 so that the upper mold 40 is bent at the bent portion of the metal pipe 31. Pair with pressure mold 42 The facing upper part 49 is compressed by bending in the direction of the tube center axis N.
2  2
部分となっている。  It has become a part.
[0074] この圧縮部分 49は、非曲げ加工部分と同様に扁平化加工される部分にもなつてい るため、圧縮部分 49には、扁平化加工による金属管 31の円周方向への圧縮力と、 曲げ加工による管中心軸線 Nの方向への圧縮力とが生じ、このため、圧縮部分 49  [0074] Since the compression portion 49 is also a portion that is flattened in the same manner as the non-bending portion, the compression portion 49 has a compressive force in the circumferential direction of the metal tube 31 by the flattening processing. And a compressive force in the direction of the tube center axis N due to the bending process occurs.
2  2
は、非曲げ加工部分よりも金属管 31の内側へ窪んだ窪み部が発生しやすい状態と なっている。  In this state, a hollow portion that is recessed toward the inside of the metal tube 31 is more likely to occur than the unbent portion.
[0075] しかし、この実施形態では、上型 40の加圧型 42で発生する加圧力 Fの加圧成分 F  [0075] However, in this embodiment, the pressurizing component F of the pressurizing force F generated by the pressurizing die 42 of the upper die 40 is as follows.
8  8
は、加圧力 Fの加圧成分 F よりも大きいため、このように大きく設定されている加 Is larger than the pressurizing component F of the pressurizing force F.
8H 6 6H 8H 6 6H
圧成分 F により、窪み部が生ずるのを防止しながら金属管 31を扁平化加工できるこ  The pressure component F can flatten the metal tube 31 while preventing the formation of recesses.
8H  8H
とになる。  It becomes.
[0076] また、本実施形態でも、上下型 40, 43のカロ圧型 42, 45のカロ圧面 42A, 45Aは、 金属管 31の曲げ加工部分において、曲率半径が同じになった湾曲凹面となってい るため、金属管 1の曲げ加工部分を、管中心軸線 N  Also in this embodiment, the upper and lower molds 40, 43 of the calo pressure molds 42, 45 have curved concave surfaces with the same radius of curvature at the bent portion of the metal tube 31. Therefore, the bent part of the metal tube 1 is
2に関する上下部分を対称形状 にさせて扁平化加工することができ、金属管 31の非曲げ加工部分でも加圧面 41A, 45Aの曲率半径は同じであるため、金属管 1の非曲げカ卩ェ部分でも、管中心軸線 N  2 can be flattened by making the upper and lower parts symmetrical, and the radius of curvature of the pressure surfaces 41A and 45A is the same in the non-bending part of the metal tube 31. Even in the part, the tube center axis N
2に関する上下部分を対称形状にさせて扁平化加工することができる。 Flattening can be performed by making the upper and lower parts related to 2 symmetrical.
[0077] 図 9及び図 10は、図 6、図 7及び図 8の実施形態と同じぐ金属管 31の一部を曲げ 加工しながらこの金属管 1を扁平化加工する第 4実施形態を示し、図 9は、図 7に対 応する図であり、図 10は、図 8に対応する図である。この実施形態では、上下型 50, 53の型本体 51, 54にセットされているカロ圧型 52, 55のカロ圧面 52A, 55Aは、複数 の平坦面の組み合わせで形成されて 、る。  FIGS. 9 and 10 show a fourth embodiment in which the metal tube 1 is flattened while bending a part of the same metal tube 31 as in the embodiments of FIGS. 6, 7 and 8. 9 is a diagram corresponding to FIG. 7, and FIG. 10 is a diagram corresponding to FIG. In this embodiment, the caloric pressure surfaces 52A and 55A of the caloric pressure molds 52 and 55 set on the mold bodies 51 and 54 of the upper and lower molds 50 and 53 are formed by a combination of a plurality of flat surfaces.
[0078] すなわち、図 9で示す金属管 31の非曲げ加工部分と対応する部分における加圧 面 52A, 55Aは、金属管 31の水平の直径方向中央の第 1平坦面 56, 58と、これら の第 1平坦面 56, 58に対して金属管 31の水平の直径方向両側に設けられた第 2平 坦面 57, 59とで形成されている。上型 50の加圧型 52の第 2平坦面 57は、第 1平坦 面 56から金属管 31の水平の直径方向に対して下り傾斜で傾いた傾斜面となってお り、下型 53の加圧型 55の第 2平坦面 59は、第 1平坦面 58から金属管 31の水平の直 径方向に対して上り傾斜で傾 、た傾斜面となって 、る。 That is, the pressurizing surfaces 52A and 55A in the portion corresponding to the non-bending portion of the metal tube 31 shown in FIG. 9 are the first flat surfaces 56 and 58 at the center in the horizontal diameter direction of the metal tube 31. The first flat surfaces 56 and 58 are formed by second flat surfaces 57 and 59 provided on both sides of the horizontal direction of the metal tube 31 in the diametrical direction. The second flat surface 57 of the pressurizing die 52 of the upper die 50 is an inclined surface that is inclined downward from the first flat surface 56 with respect to the horizontal diameter direction of the metal tube 31. The second flat surface 59 of the pressure die 55 extends from the first flat surface 58 to the horizontal straight line of the metal tube 31. It is inclined with an upward inclination with respect to the radial direction.
[0079] また、図 10で示す金属管 31の曲げカ卩ェ部分と対応する部分における加圧面 52A , 55Aは、金属管 31の水平の直径方向中央の第 3平坦面 60, 62と、これらの第 3平 坦面 60, 62に対して金属管 31の水平の直径方向両側に設けられた第 4平坦面 61 , 63とで形成されている。上型 50の加圧型 52の第 4平坦面 61は、第 3平坦面 60か ら金属管 31の水平の直径方向に対して下り傾斜で傾いた傾斜面となっており、下型 53の加圧型 55の第 4平坦面 63は、第 3平坦面 62から金属管 31の水平の直径方向 に対して上り傾斜で傾いた傾斜面となっている。第 1平坦面 56, 58と第 3平坦面 60, 62は滑らかに連続し、第 2平坦面 57, 59と第 4平坦面 61, 63も滑らかに連続してい る。  [0079] In addition, the pressing surfaces 52A and 55A in the portion corresponding to the bent portion of the metal tube 31 shown in FIG. 10 are the third flat surfaces 60 and 62 in the horizontal diametrical center of the metal tube 31, and these The fourth flat surfaces 61 and 63 are provided on both horizontal diametrical sides of the metal tube 31 with respect to the third flat surfaces 60 and 62. The fourth flat surface 61 of the pressurizing die 52 of the upper die 50 is an inclined surface inclined downward from the third flat surface 60 with respect to the horizontal diameter direction of the metal tube 31, and The fourth flat surface 63 of the pressure die 55 is an inclined surface inclined upward from the third flat surface 62 with respect to the horizontal diameter direction of the metal tube 31. The first flat surfaces 56, 58 and the third flat surfaces 60, 62 are smoothly continuous, and the second flat surfaces 57, 59 and the fourth flat surfaces 61, 63 are also smoothly continuous.
[0080] そして、第 3平坦面 60, 62に対する第 4平坦面 61, 63の傾斜角度は、第 1平坦面 56, 58に対する第 2平坦面 57, 59の傾斜角度よりも大きくなつている。  The inclination angle of the fourth flat surfaces 61 and 63 with respect to the third flat surfaces 60 and 62 is larger than the inclination angle of the second flat surfaces 57 and 59 with respect to the first flat surfaces 56 and 58.
[0081] この実施形態では、上型 50が下型 53に向かって下降すると、図 9で示されている 金属管 31の非曲げ加工部分では、金属管 31の最高部位と最低部位になっている 第 1部位 31A, 31B力 カロ圧型 52, 55の第 1平坦面 56, 58からの加圧力 Fで金属  In this embodiment, when the upper die 50 is lowered toward the lower die 53, the unbent portion of the metal tube 31 shown in FIG. 9 becomes the highest portion and the lowest portion of the metal tube 31. Yes First part 31A, 31B force Metal from pressure force F from first flat surfaces 56, 58 of Calo pressure type 52, 55
9 管 31の中心に向かって加圧され、次いで、第 1部位 31A、 31Bに対して金属管 31の 円周方向両側の部位となっている第 2部位 31C、 3D力 加圧型 52, 55の第 2平坦 面 57, 59からの加圧力 F で加圧される。また、図 10で示されている金属管 31の曲  9 Pressurized toward the center of the pipe 31 and then the second part 31C, the 3D force pressurizing molds 52, 55 which are parts on both sides of the metal pipe 31 in the circumferential direction with respect to the first parts 31A, 31B Pressurized by the applied pressure F from the second flat surface 57, 59. In addition, the curve of the metal tube 31 shown in FIG.
10  Ten
げ加工部分でも、金属管 31の最高部位と最低部位になっている第 3部位 31E, 31F 力 加圧型 52, 55の第 3平坦面 60, 62からの加圧力 F で金属管 31の中心に向か  Even in the brazed part, the 3rd part 31E, 31F which is the highest part and the lowest part of the metal pipe 31 is applied to the center of the metal pipe 31 by the pressure F from the third flat surface 60, 62 of the pressurizing mold 52, 55. Head
11  11
つて加圧され、次いで、第 3部位 31E, 31Fに対して金属管 31の円周方向両側の部 位となっている第 4部位 31G, 31Hが、加圧型 52, 55の第 4平坦面 61, 63からの加 圧力 F で加圧される。  Then, the fourth portions 31G and 31H, which are the portions on both sides in the circumferential direction of the metal tube 31 with respect to the third portions 31E and 31F, are the fourth flat surfaces 61 of the pressing dies 52 and 55, respectively. , Pressure is applied with pressure F from 63.
12  12
[0082] このため、金属管 31の非曲げカ卩ェ部分と対応する第 1平坦面 56, 58の部分には 金属管 31を加圧力 Fで加圧する第 1加圧部が、第 2平坦面 57, 59の部分には金属  [0082] For this reason, the first flat surface 56, 58 corresponding to the unbent portion of the metal tube 31 is provided with a first pressurizing part that pressurizes the metal tube 31 with the applied pressure F. Metal on surface 57, 59
9  9
管 31を加圧力 F で加圧する第 2加圧部が、それぞれ存在し、また、金属管 31の曲  There is a second pressurizing part that pressurizes the pipe 31 with the applied pressure F, and the metal pipe 31 is bent.
10  Ten
げ加工部分と対応する第 3平坦面 60, 62の部分には金属管 31を加圧力 F で加圧  Metal pipe 31 is pressed with pressure F on the third flat surfaces 60 and 62 corresponding to the brazed part.
11 する第 3加圧部が、第 4平坦面 61, 63の部分には金属管 31を加圧力 F で加圧する 第 4加圧部が、それぞれ存在する。第 2加圧部で発生する加圧力 F は、第 1部位 31 11 The third pressurizing part pressurizes the metal pipe 31 with the applied pressure F to the parts of the fourth flat surfaces 61 and 63. There is a fourth pressure part. The applied pressure F generated in the second pressurizing part is the first part 31
10  Ten
A, 31Bの側へ向かう加圧成分 F を有し、第 4加圧部で発生する加圧力 F は、第  A pressurizing component F that goes to the side of A and 31B, and the pressure F generated in the fourth pressurizing part is
10H 12 10H 12
3部位 31E, 31Fの側へ向かう加圧成分 F を有する。 It has a pressure component F toward the three sites 31E and 31F.
12H  12H
[0083] そして、第 3平坦面 60, 62に対する第 4平坦面 61, 63の傾斜角度は、第 1平坦面 56, 58に対する第 2平坦面 57, 59の傾斜角度よりも大きくなつているため、加圧力 F の加圧成分 F は、加圧力 F の加圧成分 F よりも大きい。また、第 2部位 31C, [0083] The inclination angle of the fourth flat surfaces 61, 63 with respect to the third flat surfaces 60, 62 is larger than the inclination angle of the second flat surfaces 57, 59 with respect to the first flat surfaces 56, 58. The pressurizing component F of the pressing force F is larger than the pressing component F of the pressing force F. The second part 31C,
12 12H 10 10H 12 12H 10 10H
31Dは、第 1部位 31A, 31Bから金属管 1の内側方向へずれており、第 4部位 31G, 31Hは、第 3部位 31E, 31Fから金属管 1の内側方向へずれている。  31D is displaced from the first portions 31A, 31B toward the inside of the metal tube 1, and the fourth portions 31G, 31H are displaced from the third portions 31E, 31F toward the inside of the metal tube 1.
[0084] このため、この実施形態でも、図 6、図 7及び図 8の実施形態と同様に、金属管 31を 、窪み部が生ずるのを防止しながら扁平化加工できることになる。  [0084] For this reason, in this embodiment as well, the metal tube 31 can be flattened while preventing the formation of the recessed portion, as in the embodiments of Figs.
[0085] 次に第 5実施形態について説明する。図 11は、この実施形態における扁平化加工 前の金属管 71を示し、図 12は、扁平化加工後の金属管 71 '、言い換えると、この実 施形態に係る金属管 71の扁平化加工装置及び方法によって製造された金属管製 品を示す。扁平化カ卩ェされた金属管 71 'は、四輪車両のブレーキペダル用アームと して用いられるものである。  Next, a fifth embodiment will be described. FIG. 11 shows the metal pipe 71 before flattening in this embodiment, and FIG. 12 shows the metal pipe 71 ′ after flattening, in other words, the flattening apparatus for the metal pipe 71 according to this embodiment. And metal tube products manufactured by the method. The flattened metal tube 71 'is used as a brake pedal arm for a four-wheel vehicle.
[0086] 図 11で示されているとおり、扁平化カ卩ェ前の金属管 71は、拡径カ卩ェによって直径 が大きくなつた大径部分 72と、この大径部分 72と滑らかに連続し、拡径加工されて いない小径部分 73とからなる。また、大径部分 72は小径部分 73に対して角度 Θ で 曲げ加工されており、小径部分 73における大径部分 72とは反対側の端部 73Aは、 角度 Θ とは異なる方向に曲げ加工されている。これらの拡径加圧や曲げ加工は、扁 平化加工の前に予備加工として実施されている。また、扁平化加工前の金属管 71に おける管中心軸線 Nの方向の任意な位置において、金属管 71の管中心軸線 Nに  [0086] As shown in FIG. 11, the metal tube 71 before the flattening cauldron has a large-diameter portion 72 whose diameter has been increased by the diameter-enlarged cauldron, and the large-diameter portion 72 smoothly connected to the large-diameter portion 72. And a small-diameter portion 73 that has not been diameter-expanded. The large-diameter portion 72 is bent at an angle Θ relative to the small-diameter portion 73, and the end 73A of the small-diameter portion 73 opposite to the large-diameter portion 72 is bent in a direction different from the angle Θ. ing. These diameter expansion pressurization and bending are performed as preliminary processing before flattening. In addition, at an arbitrary position in the direction of the tube center axis N in the metal tube 71 before flattening, the tube is aligned with the tube center axis N of the metal tube 71.
3 3 関する垂直断面は、これまでの実施形態と同じぐ円形となっている。  The vertical cross section for 3 3 has the same circular shape as the previous embodiments.
[0087] 図 12で示されているように、扁平化加工後の金属管 71 'は、大径部分 72と、端部 7 3Aを除く小径部分 73の大部分とが扁平化加工されており、また、大径部分 72と小 径部分 73との間は角度 0 よりも大きい角度 0 に曲げ加工されている。小径部分 73 [0087] As shown in FIG. 12, the flattened metal tube 71 'has a large diameter portion 72 and a large portion of the small diameter portion 73 excluding the end portion 73A being flattened. Also, the large diameter portion 72 and the small diameter portion 73 are bent at an angle 0 larger than the angle 0. Small diameter part 73
1 2  1 2
の端部 73Aを扁平化加工しな ヽ理由は、扁平化加工後の金属管 71 'を所定の全長 とするために、管中心軸線 Nと直交する方向へ移動する切断具 74で金属管 71 'の 端部 73Aを切断する際に、端部 73Aが扁平化されていると、この切断作業を実施す ることが困難になってしまうからであり、端部 73Aの管中心軸線 Nに関する垂直断面 The reason for not flattening the end 73A of the metal tube 71 is that the metal tube 71 ′ is moved by a cutting tool 74 that moves in a direction perpendicular to the tube center axis N so that the flattened metal tube 71 ′ has a predetermined overall length. 'of This is because if the end 73A is flattened when the end 73A is cut, it becomes difficult to carry out this cutting operation, and the vertical cross section of the end 73A with respect to the tube center axis N
3  Three
が円形に維持されていると、この端部 73Aを切断具 74で押し潰し変形させることなく 容易に切断できるからである。  This is because the end portion 73A can be easily cut without being crushed and deformed by the cutting tool 74 if it is maintained in a circular shape.
[0088] 図 13は、この実施形態に係る金属管 71の扁平化加工装置となっているプレス装置 の上下型 80, 83の部分を示す要部断面図であり、図 14は、図 13の S14— S14線矢 視図、図 15は、金属管 71を扁平化加工した後の上下型 80, 83の部分の要部断面 図である。図 13で示されているように、プレス型である上下型 80, 83は、型本体 81, 84と、これらの型本体 81, 84に形成された凹部 81A, 84Aに埋め込みセットされた 加圧型 82, 85とを備えている。これらの加圧型 82, 85の金属管 71と対面する面は、 金属管 71の小径部分 73の端部 73Aと対面する部分 82B, 85Bを除き、金属管 71を 扁平化加工するために加圧する加圧面 82A, 85Aとなって!/、る。  FIG. 13 is a cross-sectional view of the main part showing the upper and lower molds 80 and 83 of the press device that is a flattening device for the metal pipe 71 according to this embodiment, and FIG. FIG. 15 is an essential part cross-sectional view of the upper and lower molds 80 and 83 after the metal tube 71 is flattened. As shown in FIG. 13, the upper and lower dies 80 and 83 which are press dies are the die main bodies 81 and 84, and the pressure dies embedded and set in the recesses 81 </ b> A and 84 </ b> A formed in these die main bodies 81 and 84. 82, 85. The surface facing the metal tube 71 of these pressurizing molds 82 and 85 is pressurized to flatten the metal tube 71 except for the portions 82B and 85B facing the end 73A of the small diameter portion 73 of the metal tube 71. The pressure surfaces become 82A and 85A!
[0089] 加圧型 82, 85の金属管 71と対面する面のうち、小径部分 73の端部 73Aと対面す る部分 82B, 85Bは、扁平化加工前のこの端部 73Aの断面形状と曲率半径が同じ になっている湾曲凹面である。このため、図 15で示されているように、下降した上型 8 0の型本体 81が下型 83の型本体 84に当接して型締めがなされ、これによつて金属 管 71の扁平化力卩ェが終了したときには、端部 73Aの外周面はこれらの湾曲凹面 82 B, 85Bで単に囲まれた状態となっており、端部 73Aは加圧型 82, 85で扁平化加工 されな!/ヽようになって!/ヽる。  [0089] Of the surfaces facing the metal pipe 71 of the pressurization mold 82, 85, the portions 82B, 85B facing the end 73A of the small-diameter portion 73 are the cross-sectional shape and curvature of the end 73A before flattening. A curved concave surface with the same radius. Therefore, as shown in FIG. 15, the lower mold body 81 of the upper mold 80 abuts against the mold body 84 of the lower mold 83 and is clamped, thereby flattening the metal tube 71. When the force is finished, the outer peripheral surface of the end 73A is simply surrounded by the curved concave surfaces 82B and 85B, and the end 73A is not flattened by the pressure dies 82 and 85! / Become like!
[0090] また、加圧型 82, 85は、金属管 71の大径部分 72を扁平化カ卩ェするための第 1部 分 86, 88と、端部 73Aを除く小径部分 73を扁平化加工するための第 2部分 87, 89 とを有し、第 2部分 87, 89は、水平となっている第 1部分 86, 88から上り傾斜で傾斜 している部分となっている。これにより、金属管 71は、扁平化加工されると同時に、大 径部分 72と小径部分 73との間で角度 Θ に曲げカ卩ェされるようになつている。  [0090] The pressurizing dies 82 and 85 flatten the first portion 86 and 88 for flattening the large-diameter portion 72 of the metal pipe 71 and the small-diameter portion 73 excluding the end portion 73A. The second portions 87 and 89 are inclined at an upward slope from the horizontal first portions 86 and 88. As a result, the metal pipe 71 is flattened and bent at an angle Θ between the large-diameter portion 72 and the small-diameter portion 73 at the same time.
2  2
[0091] また、この実施形態では、扁平化加工前の大径部分 72の直径に対して、扁平化加 ェ後の大径部分 72の厚さ寸法は充分に小さくなるため、上型 80が下型 83に対して 所定距離だけ下降して大径部分 72の扁平化加工が所定程度まで進行したときに、 下型 80の加圧型 85上にセットされている金属管 71の大径部分 72の内部に挿入さ れるようになっている芯部材 90が、この実施形態のプレス装置に用意されている。こ の芯部材 90は、例えば、上型 80の上下動によって駆動されるスライドカム手段又は 油圧シリンダ等による駆動手段で金属管 71に向力つて進退動するものとなっており、 図 13で示されて!/、るように、加圧型 85を埋め込みセットするために下型 83の型本体 84に形成されている前記凹部 84Aの芯部材 90側の立上り壁 84B及びこの立上り壁 84Bの厚さ部分の内部には、芯部材 90の進退動を案内するためのガイドブッシュ 91 が組み込まれている。 In this embodiment, the thickness of the large-diameter portion 72 after flattening is sufficiently small with respect to the diameter of the large-diameter portion 72 before flattening. When the flattening of the large-diameter portion 72 has progressed to a predetermined level by descending a predetermined distance with respect to the lower die 83, the large-diameter portion 72 of the metal pipe 71 set on the pressurizing die 85 of the lower die 80 Inserted inside A core member 90 is prepared for the press device of this embodiment. The core member 90 is moved forward and backward by a force toward the metal pipe 71 by a driving means such as a slide cam means or a hydraulic cylinder driven by the vertical movement of the upper mold 80, as shown in FIG. In order to embed and set the pressure mold 85, the rising wall 84B on the core member 90 side of the recess 84A formed in the mold body 84 of the lower mold 83 and the thickness of the rising wall 84B A guide bush 91 for guiding the forward and backward movement of the core member 90 is incorporated in the portion.
[0092] 金属管 71の上下型 80, 83による扁平化カ卩ェは、図 13で示されているように、金属 管 71における管中心軸線 Nの方向の一方の端面となっている大径部分 72の端面 7  [0092] As shown in FIG. 13, the flattening of the metal pipe 71 by the upper and lower molds 80 and 83 has a large diameter which is one end face in the direction of the pipe center axis N in the metal pipe 71. End face of part 72 7
3  Three
2Aを上記立上り壁 84Bに当接させることによって、金属管 71を下型 83の加圧型 85 上にセットした後に開始される。上型 80が下降することにより、金属管 71の大径部分 72と、端部 73Aを除く小径部分 73は、加圧型 82, 85の加圧面 82A, 85Aによって 扁平化加工され、大径部分 72の扁平化加工は、金属管 1の内部に芯部材 90が挿入 されて行われる。  This is started after the metal pipe 71 is set on the pressurizing mold 85 of the lower mold 83 by bringing 2A into contact with the rising wall 84B. As the upper die 80 is lowered, the large-diameter portion 72 of the metal pipe 71 and the small-diameter portion 73 excluding the end 73A are flattened by the pressure surfaces 82A and 85A of the pressure dies 82 and 85, and the large-diameter portion 72 This flattening process is performed by inserting the core member 90 into the metal tube 1.
[0093] この芯部材 90の挿入は、上型 80が下降を始めて金属管 1の扁平化加工が始まつ た後に、芯部材 90が端面 72Aから金属管 1の内部に挿入されることによって始まり、 この後、加圧型 82, 85で大径部分 72が所定に断面形状に成形される前までには、 芯部材 90は、金属管 71の全長の途中までとなっている大径部分 72の長さ範囲に挿 入される。  [0093] The insertion of the core member 90 starts when the core member 90 is inserted into the interior of the metal tube 1 from the end face 72A after the upper die 80 starts to descend and the flattening of the metal tube 1 begins. After this, before the large-diameter portion 72 is formed into a predetermined cross-sectional shape with the pressurization dies 82 and 85, the core member 90 is formed in the middle portion of the large-diameter portion 72 that is halfway along the entire length of the metal tube 71. Inserted into the length range.
[0094] また、金属管 71の扁平化加工は、大径部分 72と小径部分 73との間で金属管 71が 角度 Θ に曲げ加工されながら行われ、金属管 71の曲げ加工部分と対応する加圧型 [0094] Further, the flattening of the metal tube 71 is performed while the metal tube 71 is bent at an angle Θ between the large diameter portion 72 and the small diameter portion 73, and corresponds to the bent portion of the metal tube 71. Pressurized type
2 2
82, 85の力卩圧面 82A, 85Aの部分には、図 7と図 8の実施形態又は図 9と図 10実施 形態と同様に、第 3加圧部と第 4加圧部が設けられている。また、金属管 71の非曲げ 加工部分となっている小径部分 73と対応する加圧型 82A, 85Aの加圧面 82A, 85 Aの部分にも、図 7と図 8の実施形態又は図 9と図 10実施形態と同様に、第 1加圧部 と第 2加圧部が設けられている。そして、第 4加圧部で発生する加圧力には、第 3カロ 圧部の加圧力による加圧側へ向かう加圧成分があり、第 2加圧部で発生する加圧力 には、第 1加圧部の加圧力による加圧側へ向かう加圧成分があり、第 4加圧部の加圧 力の加圧成分は第 2加圧部の加圧力の加圧成分よりも大きいため、金属管 71の曲 げ加工部分は、金属管 71の内側への窪み部が発生することなぐ扁平化加工されて 曲げ加工されることになる。 Similar to the embodiment shown in FIGS. 7 and 8 or the embodiment shown in FIGS. 9 and 10, the third and fourth pressure members are provided on the pressure and pressure surfaces 82A and 85A of 82 and 85. Yes. In addition, the embodiment of FIG. 7 and FIG. 8 or the embodiment of FIG. 9 and FIG. As in the tenth embodiment, a first pressure unit and a second pressure unit are provided. The pressurizing force generated in the fourth pressurizing part has a pressurizing component directed to the pressurizing side by the pressurizing force of the third caloric pressurizing part, and the pressurizing force generated in the second pressurizing part includes the first pressurizing part. There is a pressurizing component that goes to the pressurizing side due to the pressurizing force of the pressure part, and pressurization of the fourth pressure part The pressing component of the force is greater than the pressing component of the pressing force of the second pressurizing part, so the bent part of the metal pipe 71 is flattened so that no indentation occurs inside the metal pipe 71. To be bent.
[0095] また、加圧型 82, 85のカロ圧面 82A, 85Aのうち、大径部分 72と対応する部分は、 金属管 71の内面が芯部材 90に接触するまで、この大径部分 72を扁平化加工する ための部分となっている。 [0095] Of the caloric pressure surfaces 82A and 85A of the pressurizing dies 82 and 85, the portion corresponding to the large diameter portion 72 is flattened until the inner surface of the metal tube 71 contacts the core member 90. It is a part for chemical processing.
[0096] 以上の金属管 71の扁平化力卩ェと曲げカ卩ェは、小径部分 73の端部 73Aを除く金属 管 71の全体を圧縮しながら行われるため、この圧縮のため、扁平化加工後の金属管[0096] The flattening force curve and bending curve of the metal pipe 71 described above are performed while compressing the entire metal pipe 71 excluding the end 73A of the small-diameter portion 73. Metal tube after processing
71 'は、金属管 71の材料の余肉の移動によって管中心軸線 Nの方向に全長が延 The length of 71 'extends in the direction of the tube center axis N due to the movement of the surplus material of the metal tube 71.
3  Three
びていることになる。本実施形態の金属管 71の扁平化加工と曲げ加工は、金属管 7 1における管中心軸線 Nの方向の一方の端面 72Aを上記立上り壁 84Bに当接させ  It will be. In the flattening and bending of the metal pipe 71 of the present embodiment, one end surface 72A of the metal pipe 71 in the direction of the pipe center axis N is brought into contact with the rising wall 84B.
3  Three
て行われるため、金属管 71の全長の延びは、この端面 72Aが管中心軸線 Nの外側  Therefore, the end surface 72A of the metal tube 71 extends outside the tube center axis N.
3 方向に移動することを阻止させて行われることになる。  It will be done in a way that prevents it from moving in three directions.
[0097] すなわち、本実施形態では、立上り壁 84B力 端面 72Aが管中心軸線 Nの外側 That is, in this embodiment, the rising wall 84B force end surface 72A is outside the tube center axis N.
3 方向に移動することを規制する端面移動規制部となっており、このため、金属管 71の 全長の延びは、管中心軸線 Nの方向の他方の側への延びとなって生ずる。このよう  This is an end face movement restricting portion that restricts movement in three directions. For this reason, the entire length of the metal tube 71 is extended to the other side in the direction of the tube center axis N. like this
3  Three
に金属管 71の全長が管中心軸線 Nの方向の他方の側へ延びた場合に、延び側と  When the entire length of the metal pipe 71 extends to the other side in the direction of the pipe center axis N,
3  Three
なってい小径部分 73の端部 73Aの外周面は、上記扁平化加工の終了時に、図 15 で示されているように、加圧型 82, 85の前述した湾曲凹面 82B, 85Bで囲まれてお り、これらの湾曲凹面 82B、 85Bの曲率半径は、扁平化加工前の金属管 71の小径 部分 73の断面形状の曲率半径と同じであるため、端部 73Aは、扁平化加工されな い円形の断面形状をそのまま維持することになる。  At the end of the flattening process, the outer peripheral surface of the end 73A of the small-diameter portion 73 is surrounded by the aforementioned curved concave surfaces 82B and 85B of the pressure dies 82 and 85 as shown in FIG. Therefore, the curvature radii of the curved concave surfaces 82B and 85B are the same as the curvature radius of the cross-sectional shape of the small-diameter portion 73 of the metal pipe 71 before flattening, so the end 73A is a circular shape that is not flattened. The cross-sectional shape is maintained as it is.
[0098] このため、上下型 80, 83を型開きした後に取り出された扁平化カ卩ェ後の金属管 71 [0098] For this reason, the metal pipe 71 after flattening is taken out after the upper and lower dies 80, 83 are opened.
'を適正な全長とするために、図 12の切断具 74で端部 73Aを切断する作業を所定 どおり容易に行える。  In order to obtain a proper overall length, the work of cutting the end 73A with the cutting tool 74 of FIG. 12 can be easily performed as prescribed.
[0099] なお、上型 80に切断具 74を取り付けることにより、上型 80の下降による金属管 71 の扁平化加工と同時に端部 73Aの切断作業を行えるようにしてもよい。  [0099] Note that by attaching the cutting tool 74 to the upper mold 80, the end portion 73A may be cut simultaneously with the flattening of the metal pipe 71 by the lowering of the upper mold 80.
[0100] 図 16は、金属管 71についての扁平化カ卩工及び曲げ力卩ェを行うときに、金属管 71 の大径部分 72に 3個の孔の孔開け加工を行えるようにした第 6実施形態を示す。こ の実施形態の上型 80には、 3個のパンチ部材 92, 93, 94が下向きに取り付けられ ており、芯部材 90には、パンチ部材 92, 93, 94をガイドするためのガイド孔 90A, 9 OB, 90Cが形成されている。このため、金属管 1から扁平加工と曲げ加工で製造され た金属管 71 'には、大径部分 72において、これらのガイド孔 90A, 90B, 90Cでガイ ドされて下降するノンチ咅材 92, 93, 94により、孑し 95, 96, 97力 ^形成されて!/、る。 FIG. 16 shows the metal tube 71 when the metal tube 71 is flattened and bent. FIG. 6 shows a sixth embodiment in which three large holes 72 can be drilled. Three punch members 92, 93, 94 are attached downward to the upper mold 80 of this embodiment, and a guide hole 90A for guiding the punch members 92, 93, 94 is provided in the core member 90. , 9 OB, 90C are formed. For this reason, the metal pipe 71 ′ produced by flattening and bending from the metal pipe 1 has a large diameter portion 72 and is guided by these guide holes 90A, 90B, 90C to descend, and the non-chisel brazing material 92, With 93, 94, 95, 96, 97 forces are formed!
[0101] これにより、金属管 71 'を前述したブレーキペダル用アームとする場合に必要となる 孔 95, 96, 97Cの加工を、金属管 71から金属管 71 'を製造するときに同時に行える [0101] Thus, the holes 95, 96, and 97C required when the metal pipe 71 'is used as the brake pedal arm can be processed simultaneously with the production of the metal pipe 71' from the metal pipe 71.
[0102] なお、図 16のパンチ部材 92, 93, 94は、上型 80の型本体 81及び加圧型 82に配 置されている力 例えば、上型 80に、型本体 81と分離していてこの型本体 81から遅 れて下降する分離型を設け、この分離型に 3個のパンチ部材を配置することにより、 大径部分 72が加圧型 82, 85と芯部材 90とで所定の断面形状に成形された直後に 、上記分離型の下降により、 3個のパンチ部材で大径部分 72に孔 95, 96, 97を形 成するようにしてちょい。 Note that the punch members 92, 93, 94 in FIG. 16 are separated from the mold body 81 in the upper mold 80, for example, the force disposed on the mold body 81 and the pressure mold 82 of the upper mold 80. By providing a separation mold that descends later from the mold body 81 and arranging three punch members in this separation mold, the large-diameter portion 72 has a predetermined cross-sectional shape between the pressure molds 82 and 85 and the core member 90. Immediately after being formed into holes, holes 95, 96, and 97 are formed in the large-diameter portion 72 by three punch members by lowering the separation mold.
[0103] 図 17は、図 16の実施形態で製造された金属管 71 'から作られた四輪車両のブレ ーキペダル用アーム 100と、このアーム 100に取り付けられたブレーキペダル 110を 示す平面図であり、図 18は、これらのアーム 100とブレーキペダル 110の側面図であ る。アーム 100は、金属管 71 'の小径部分 73の端部 73Aが前述した切断具 74で切 断されたものとなっており、この切断端部にブレーキペダル 110が取り付けられてい る。そして、アーム 100は、図 17で示されているように、図 16の加圧型 82, 85による 曲げカ卩ェにより、図 12で示した角度 0 に曲げカ卩ェされている。この角度 0 により、  FIG. 17 is a plan view showing a brake pedal arm 100 of a four-wheel vehicle made of the metal pipe 71 ′ manufactured in the embodiment of FIG. 16, and a brake pedal 110 attached to the arm 100. FIG. 18 is a side view of the arm 100 and the brake pedal 110. In the arm 100, the end 73A of the small diameter portion 73 of the metal pipe 71 ′ is cut by the cutting tool 74 described above, and the brake pedal 110 is attached to the cut end. Then, as shown in FIG. 17, the arm 100 is bent at the angle 0 shown in FIG. 12 by the bending care by the pressure dies 82 and 85 in FIG. With this angle 0,
2 2 アーム 100に近接させて四輪車両に配置することが必要な部材、例えば、ステアリン グシャフトのための配置スペースが確保される。  2 2 Space is secured for members that need to be placed on the four-wheeled vehicle close to the arm 100, for example, a steering shaft.
[0104] また、アーム 100は、図 18で示されているとおり、上下寸法が大きい大寸法部分 10 1と、この大寸法部分 101よりも上下寸法が小さい小寸法部分 102とからなり、前述し た扁平化加工により、大寸法部分 101は上述した大径部分 72で形成され、小寸法 部分 102は小径部分 73で形成されている。また、この扁平化カ卩ェは、アーム 100の 内部に空洞部を残して行われ、この空洞部は、アーム 100の全長に渡って連続して いる。大寸法部分 101には前述した孔 95, 96, 97が設けられ、孔 95は、ブレーキ用 マスターシリンダの倍力装置とアーム 100とを連結するためのリンク部材 111をアーム 100に接続するために用いられ、孔 96は、アーム 100の水平の回動中心軸 112を揷 入するために用いられ、孔 97は、回動中心軸 112を中心に下向きに回動したときの アーム 100に戻り力を付与するためのリターンばね 113をアーム 100に連結するため に用いられる。 Further, as shown in FIG. 18, the arm 100 includes a large dimension portion 101 having a large vertical dimension and a small dimension portion 102 having a vertical dimension smaller than the large dimension portion 101, as described above. By the flattening process, the large dimension portion 101 is formed by the large diameter portion 72 described above, and the small dimension portion 102 is formed by the small diameter portion 73. In addition, this flattening cover This is performed while leaving a cavity inside, and this cavity is continuous over the entire length of the arm 100. The large dimension portion 101 is provided with the above-described holes 95, 96, 97. The hole 95 is used to connect the link member 111 for connecting the booster of the brake master cylinder and the arm 100 to the arm 100. The hole 96 is used to insert the horizontal rotation center axis 112 of the arm 100, and the hole 97 returns to the arm 100 when rotated downward about the rotation center axis 112. It is used to connect the return spring 113 to the arm 100.
[0105] 図 19は、図 18で示すアーム 100の小寸法部分 102における S19— S19線断面図 であり、図 20は、図 18で示すアーム 100の大寸法咅分 101における S20— S20線 断面図である。図 19で示されているように、小寸法部分 102の左右方向に対面する 2個の面 102Aは、この小寸法部分 102についての前述した扁平化カ卩ェにより、外側 へ突出した突出面となっている力 図 20で示されているように、大寸法部分 101の左 右方向に対面する 2個の面 101Aは、この大寸法部分 102についての前述した扁平 ィ匕加工力 前記芯部材 90に大寸法部分 101の内面が接触するまで行われるものと なって 、るため、互 ヽに平行となった平坦面となって!/、る。  19 is a cross-sectional view taken along the line S19—S19 in the small-size portion 102 of the arm 100 shown in FIG. 18, and FIG. 20 is a cross-sectional view taken along the line S20—S20 in the large-size proportional distribution 101 of the arm 100 shown in FIG. FIG. As shown in FIG. 19, the two surfaces 102A facing the left and right direction of the small-sized portion 102 are separated from the protruding surface that protrudes outward by the above-described flattening cache for the small-sized portion 102. As shown in FIG. 20, the two surfaces 101A facing the left and right directions of the large dimension portion 101 are formed by the above-described flat wrinkle processing force for the large dimension portion 102. The core member 90 Since the process is performed until the inner surface of the large dimension portion 101 comes into contact with each other, the flat surfaces become parallel to each other!
[0106] また、小寸法部分 102の上下寸法が Hであるのに対して、大寸法部分 101の上下 寸法は Hとなっており、 Hは Hよりも大きい。アーム 100には、四輪車両を制動させ  [0106] The vertical dimension of the small dimension part 102 is H, whereas the vertical dimension of the large dimension part 101 is H, and H is larger than H. Arm 100 brakes the four-wheeled vehicle
2 2 1  2 2 1
るためにブレーキペダル 110を下へ踏み込んだときの大きな荷重が作用し、この荷 重によってアーム 100に生ずる曲げモーメントは、アーム 100の回動中心軸 112が水 平に挿入されて ヽる孔 96が形成された部分にぉ ヽて最大となる。本実施形態では、 この部分は、上下方向の寸法が小寸法部分 102よりも大きい大寸法部分 101となつ ており、これにより、大寸法部分 101ついての水平の中立軸に関する断面係数を、小 寸法部分 102についての水平の中立軸に関する断面係数よりも大きくすることができ るため、上記曲げモーメントに対するアーム 100の強度を充分大きくすることができる  Therefore, a large load is applied when the brake pedal 110 is depressed downward, and the bending moment generated in the arm 100 due to this load is the hole 96 in which the rotation center axis 112 of the arm 100 is inserted horizontally. It becomes the maximum over the part where the is formed. In this embodiment, this portion is a large-size portion 101 whose vertical dimension is larger than that of the small-size portion 102. Thus, the section modulus of the large neutral portion 101 with respect to the horizontal neutral axis is reduced. Since the section modulus with respect to the horizontal neutral axis of the portion 102 can be made larger, the strength of the arm 100 against the bending moment can be sufficiently increased.
[0107] 図 21は、別実施形態の大寸法部分 101 'を示す。この実施形態では、大寸法部分 101 'の左右方向に対面する 2個の面 101 ' Aは、図 19の小寸法部分 102の 2個の 面 102Aと同じぐ外側へ突出する突出面となっている。この実施形態によると、大寸 法部分 101 'の上下寸法 Hは Hよりも小さくなるが、大寸法部分 101 'を、金属管の [0107] Figure 21 shows a large dimension portion 101 'of another embodiment. In this embodiment, the two surfaces 101 ′ A facing the left and right direction of the large dimension portion 101 ′ are projecting surfaces that project outward as well as the two surfaces 102 A of the small dimension portion 102 of FIG. 19. Yes. According to this embodiment, large The vertical dimension H of the normal part 101 'is smaller than H, but the large dimension part 101'
3 2  3 2
全長の途中まで挿入される前述の芯部材 90を用いることなぐ成形することが可能と なる。  It becomes possible to mold without using the above-described core member 90 inserted halfway along the entire length.
[0108] なお、この実施形態において、大寸法部分 101 'に前記孔 95, 96, 97を形成する 作業は、前述した扁平化加工及び曲げ加工を行った後の後加工として行なう。 産業上の利用可能性  In this embodiment, the operation of forming the holes 95, 96, 97 in the large dimension portion 101 ′ is performed as post-processing after performing the above-described flattening processing and bending processing. Industrial applicability
[0109] 本発明は、例えば、四輪車両のブレーキペダル用アーム等として用いられる部材を 、金属管の扁平化加工によって製造するために利用することができる。  [0109] The present invention can be used, for example, to manufacture a member used as a brake pedal arm or the like of a four-wheel vehicle by flattening a metal tube.

Claims

請求の範囲 The scope of the claims
[1] 互いに対向する 2個のプレス型を有し、管中心軸線に関する垂直断面が円形とな つている金属管を前記 2個のプレス型で加圧することによって前記金属管を扁平ィ匕 加工する金属管の扁平化加工装置にぉ 、て、  [1] A metal tube having two press dies facing each other and having a circular vertical cross-section with respect to the tube center axis is pressed by the two press dies to flatten the metal tube. Metal flattening equipment
前記 2個のプレス型のうちの少なくとも一方のプレス型は、前記金属管の表面の一 部となっている第 1部位をこの金属管の中心に向力つて加圧する第 1加圧部と、この 第 1加圧部を間に挟んで前記金属管の円周方向両側にある加圧部であって、前記 第 1部位力 前記金属管の内側方向へずれたこの金属管の表面の第 2部位を、前記 第 1部位の側へ向かう加圧成分を生じさせて加圧する第 2加圧部と、を備えているこ とを特徴とする金属管の扁平化加工装置。  At least one of the two press dies includes a first pressurizing unit that pressurizes a first part that is a part of the surface of the metal tube toward the center of the metal tube; A pressure part on both sides of the metal tube in the circumferential direction with the first pressure part interposed therebetween, wherein the first part force is a second of the surface of the metal tube that is displaced inward of the metal tube. A flattening apparatus for a metal tube, comprising: a second pressurizing unit that pressurizes the part by generating a pressurizing component toward the first part.
[2] 請求項 1に記載の金属管の扁平化加工装置において、前記一方のプレス型にお ける前記金属管と対面する面は、前記金属管の前記垂直断面よりも大きい曲率半径 となっている湾曲凹面を含む面となっており、この湾曲凹面に前記第 1加圧部と前記 第 2加圧部とが設けられていることを特徴とする金属管の扁平化加工装置。  [2] In the metal tube flattening apparatus according to claim 1, a surface of the one press die that faces the metal tube has a radius of curvature larger than the vertical cross section of the metal tube. An apparatus for flattening a metal tube, characterized in that the first pressure part and the second pressure part are provided on the curved concave surface.
[3] 請求項 1に記載の金属管の扁平化加工装置において、前記一方のプレス型にお ける前記金属管と対面する面は少なくとも 1個の平坦面を含む面となっており、この 1 個の平坦面に、前記第 1加圧部と前記第 2加圧部のうちの一方の加圧部が設けられ て!、ることを特徴とする金属管の扁平化加工装置。  [3] In the flattening apparatus for a metal tube according to claim 1, the surface facing the metal tube in the one press die is a surface including at least one flat surface. An apparatus for flattening a metal tube, characterized in that one of the first pressurizing unit and the second pressurizing unit is provided on each flat surface!
[4] 請求項 1に記載の金属管の扁平化加工装置において、前記第 1加圧部と第 2加圧 部は前記 2個のプレス型の両方に設けられていることを特徴する金属管の扁平化カロ ェ装置。  [4] The metal tube flattening apparatus according to claim 1, wherein the first pressurizing part and the second pressurizing part are provided in both of the two press dies. Flattening caloe equipment.
[5] 請求項 4に記載の金属管の扁平化加工装置において、前記 2個のプレス型の両方 における前記第 2加圧部によって生ずる前記加圧成分の大きさは同じになっているこ とを特徴とする金属管の扁平化加工装置。  [5] In the flattening apparatus for a metal tube according to claim 4, the size of the pressurizing component generated by the second pressurizing part in both of the two press dies is the same. An apparatus for flattening metal tubes.
[6] 請求項 1に記載の金属管の扁平化加工装置において、前記 2個のプレス型は前記 金属管を扁平ィ匕しながらこの金属管の一部を曲げ加工するための型になっているこ とを特徴とする金属管の扁平化加工装置。 [6] In the metal tube flattening apparatus according to claim 1, the two press dies are molds for bending a part of the metal tube while flattening the metal tube. A metal tube flattening processing device characterized by
[7] 請求項 6に記載の金属管の扁平化加工装置において、前記第 1加圧部と前記第 2 加圧部は前記金属管の曲げ加工されな 、非曲げ加工部分を加圧するための加圧部 であり、前記 2個のプレス型のうち、少なくとも前記曲げ加工によって圧縮される前記 金属管の圧縮側と対面するプレス型は、前記金属管の表面の一部となって 、る第 3 部位をこの金属管の中心に向かって加圧する第 3加圧部と、この第 3加圧部を間に 挟んで前記金属管の円周方向両側にある加圧部であって、前記第 3部位力 前記 金属管の内側方向へずれたこの金属管の表面の第 4部位を、前記第 3部位の側へ 向かう加圧成分を生じさせて加圧する第 4加圧部と、を備えており、この第 4加圧部の 加圧力の前記加圧成分は、前記第 2加圧部の加圧力の前記加圧成分よりも大きくな つて 、ることを特徴とする金属管の扁平化加工装置。 [7] The flattening apparatus for a metal tube according to claim 6, wherein the first pressure unit and the second pressure unit The pressurizing unit is a pressurizing unit for pressurizing a non-bending portion of the metal tube that is not bent, and compression of the metal tube that is compressed by at least the bending of the two press dies. The press die that faces the side is a part of the surface of the metal tube, and the third pressurizing portion that pressurizes the third portion toward the center of the metal tube, and the third pressurizing portion. Pressurizing portions on both sides in the circumferential direction of the metal tube sandwiched between the third portion force and the fourth portion of the surface of the metal tube shifted inward of the metal tube, A fourth pressurizing unit that generates and pressurizes the pressurizing component toward the side, and the pressurizing component of the pressurizing force of the fourth pressurizing unit is equal to the pressurizing force of the second pressurizing unit. An apparatus for flattening a metal tube, wherein the apparatus is larger than the pressure component.
[8] 請求項 7に記載の金属管の扁平化加工装置において、前記第 3加圧部と前記第 4 加圧部とを備えている前記プレス型における前記金属管と対面する面は、前記金属 管の前記垂直断面よりも大きい曲率半径となっている湾曲凹面を含む面となっており 、この湾曲凹面に前記第 3加圧部と前記第 4加圧部とが設けられていることを特徴と する金属管の扁平化加工装置。  [8] The flattening apparatus for a metal tube according to claim 7, wherein a surface facing the metal tube in the press die provided with the third pressurizing part and the fourth pressurizing part is It is a surface including a curved concave surface having a radius of curvature larger than the vertical cross section of the metal tube, and the third pressurized portion and the fourth pressurized portion are provided on the curved concave surface. A metal tube flattening processing device.
[9] 請求項 7に記載の金属管の扁平化加工装置において、前記第 3加圧部と前記第 4 加圧部とを備えている前記プレス型における前記金属管と対面する面は、少なくとも 1個の平坦面を含む面となっており、この 1個の平坦面に、前記第 3加圧部と前記第 4 加圧部のうちの一方の加圧部が設けられていることを特徴とする金属管の扁平化カロ ェ装置。  [9] The flattening apparatus for a metal tube according to claim 7, wherein the surface facing the metal tube in the press die having the third pressurizing part and the fourth pressurizing part is at least It is a surface including one flat surface, and one of the third pressurizing unit and the fourth pressurizing unit is provided on the one flat surface. A flattening calorie device for metal pipes.
[10] 請求項 7に記載の金属管の扁平化加工装置において、前記第 3加圧部と第 4加圧 部は前記 2個のプレス型の両方に設けられていることを特徴する金属管の扁平化カロ ェ装置。  10. The metal tube flattening apparatus according to claim 7, wherein the third pressurizing part and the fourth pressurizing part are provided in both of the two press dies. Flattening caloe equipment.
[11] 請求項 10に記載の金属管の扁平化カ卩ェ装置において、前記 2個のプレス型の両 方における前記第 4加圧部の加圧力の前記加圧成分の大きさは同じになっているこ とを特徴とする金属管の扁平化加工装置。  [11] In the flattening device for a metal tube according to claim 10, the size of the pressurizing component of the pressurizing force of the fourth pressurizing portion in both of the two press dies is the same. A metal tube flattening processing device characterized by
[12] 請求項 1に記載の金属管の扁平化加工装置において、前記金属管の前記管中心 軸線方向の一方の端面が当接し、この当接によって前記一方の端面が前記管中心 軸線方向外側へ移動することを規制するための端面移動規制部を有しており、 前記金属管の前記管中心軸線方向の他方の端部の外周面と対面する前記 2個の プレス型のそれぞれの面は、前記管中心軸線に関する垂直断面が前記円形となつ ている前記他方の端部と同じ曲率半径の湾曲凹面で形成されており、前記 2個のプ レス型による前記金属管の扁平化加工作業の終了時における前記他方の端部の外 周面は、これらの湾曲凹面によって囲まれ、前記他方の端部は、扁平化加工の終了 後に前記管中心軸線と直交する方向に移動する切断具で切断されることを特徴とす る金属管の扁平化加工装置。 [12] The flattening apparatus for a metal tube according to claim 1, wherein one end surface of the metal tube in the axial direction of the tube center abuts, and the one end surface is outside in the axial direction of the tube center by the contact. Has an end face movement restriction part for restricting movement to Each of the surfaces of the two press dies facing the outer peripheral surface of the other end of the metal tube in the tube center axis direction is the other end where a vertical cross section with respect to the tube center axis is the circular shape. The outer peripheral surface of the other end at the end of the flattening operation of the metal tube by the two press dies is formed by these curved concave surfaces. An apparatus for flattening a metal tube, characterized in that the other end is surrounded by a cutting tool that moves in a direction orthogonal to the tube center axis after the flattening process ends.
[13] 請求項 12に記載の金属管の扁平化加工装置において、前記 2個のプレス型のうち の少なくとも 1個のプレス型は、型本体と、この型本体に少なくとも一部が埋め込まれ た加圧型とを含んで形成され、前記端面移動規制部は、前記加圧型の少なくとも一 部を埋め込むために前記型本体に形成されて ヽる立上り壁となって!/ヽることを特徴と する金属管の扁平化加工装置。  [13] The flattening apparatus for a metal tube according to claim 12, wherein at least one of the two press molds is embedded in a mold body and at least a part of the mold body. The end face movement restricting portion is formed as a rising wall formed on the die main body so as to embed at least a part of the pressing die. Metal pipe flattening processing equipment.
[14] 請求項 1に記載の金属管の扁平化加工装置において、前記 2個のプレス型で前記 金属管を扁平化加工するときに、この金属管の前記管中心軸線方向の一方の端部 力 前記金属管の内部へこの金属管の全長の途中まで挿入される芯部材を備えて V、ることを特徴とする金属管の扁平化加工装置。  14. The flattening apparatus for a metal tube according to claim 1, wherein when the metal tube is flattened by the two press dies, one end portion of the metal tube in the tube center axis direction An apparatus for flattening a metal tube, comprising: a core member inserted into the inside of the metal tube to the middle of the entire length of the metal tube;
[15] 請求項 14に記載の金属管の扁平化加工装置において、前記 2個のプレス型のうち の一方のプレス型には、前記金属管に孔開け加工を行うための少なくとも 1個のパン チ部材が設けられ、前記芯部材には、前記パンチ部材をガイドするためのガイド孔が 形成されて!、ることを特徴とする金属管の扁平化加工装置。  [15] The flattening apparatus for a metal pipe according to claim 14, wherein at least one of the two press dies has at least one pan for punching the metal pipe. An apparatus for flattening a metal tube, wherein a guide member for guiding the punch member is formed in the core member!
[16] 請求項 1に記載の金属管の扁平化加工装置によって製造されたことを特徴とする 金属管製品。  [16] A metal tube product manufactured by the metal tube flattening apparatus according to [1].
[17] 車両のブレーキペダル用アームとして用いられることを特徴とする請求項 16に記載 の金属管製品。  17. The metal pipe product according to claim 16, wherein the metal pipe product is used as an arm for a brake pedal of a vehicle.
[18] 管中心軸線に関する垂直断面が円形となっている金属管を互いに対向する 2個の プレス型で加圧することによって前記金属管を扁平化加工する金属管の扁平化加工 方法において、  [18] In the method of flattening a metal tube, the metal tube having a circular vertical cross section with respect to the tube center axis is pressed by two press dies facing each other.
前記 2個のプレス型により、前記金属管の表面の一部となっている第 1部位をこの 金属管の中心に向力つて加圧するための第 1加圧工程と、前記 2個のプレス型のうち の少なくとも一方のプレス型により、前記第 1部位に対して前記金属管の円周方向両 側の部位であって、前記第 1部位力 前記金属管の内側方向へずれたこの金属管 の表面の第 2部位を、前記第 1部位の側へ向かう加圧成分を生じさせて前記金属管 を加圧するための第 2加圧工程と、を含んでいることを特徴とする金属管の扁平化カロ ェ方法。 The first part that is a part of the surface of the metal tube is formed by the two press dies. Both the circumferential direction of the metal tube with respect to the first part by the first pressurizing step for pressurizing the metal tube toward the center and at least one press die of the two press dies. The first portion force is shifted to the inner side of the metal tube, and the second portion of the surface of the metal tube is caused to generate a pressurizing component toward the first portion. And a second pressurizing step for pressurizing the metal tube.
[19] 請求項 18に記載の金属管の扁平化加工方法において、芯部材を、前記金属管の 前記管中心軸線方向の一方の端部から前記金属管の内部へこの金属管の全長の 途中まで挿入するための芯部材挿入工程を有していることを特徴とする金属管の扁 平化加工方法。  [19] The method of flattening a metal tube according to claim 18, wherein the core member is moved from one end in the tube center axis direction of the metal tube to the inside of the metal tube along the entire length of the metal tube. A method for flattening a metal tube, comprising a step of inserting a core member for inserting the metal tube.
[20] 請求項 19に記載の金属管の扁平化カ卩ェ方法において、前記 2個のプレス型のうち の一方のプレス型に少なくとも 1個配置されていて、前記芯部材に形成されたガイド 孔でガイドされるパンチ部材により、前記金属管に孔を開けるための孔開け工程を有 して 、ることを特徴とする金属管の扁平化加工方法。  [20] In the method for flattening a metal tube according to claim 19, at least one of the two press dies is disposed on one of the press dies, and the guide is formed on the core member. A flattening method for a metal tube, comprising: a punching step for making a hole in the metal tube by a punch member guided by the hole.
[21] 請求項 18に記載の金属管の扁平化加工方法によって製造されたことを特徴とする 金属管製品。  [21] A metal tube product manufactured by the method for flattening a metal tube according to claim 18.
[22] 車両のブレーキペダル用アームとして用いられることを特徴とする請求項 21に記載 の金属管製品。  22. The metal pipe product according to claim 21, wherein the metal pipe product is used as an arm for a brake pedal of a vehicle.
[23] 空洞部が内部に残されて扁平化加工された金属管によって形成され、車両のブレ ーキペダル用アームとして用いられることを特徴とする金属管製品。  [23] A metal tube product characterized in that it is formed by a flattened metal tube with a hollow portion remaining inside and used as an arm for a brake pedal of a vehicle.
[24] 請求項 23に記載の金属管製品において、前記空洞部は、前記金属管の全長に渡 つて連続して 、ることを特徴とする金属管製品。  24. The metal tube product according to claim 23, wherein the hollow portion is continuous over the entire length of the metal tube.
[25] 請求項 23に記載の金属管製品において、上下方向の寸法が大きい大寸法部分と 、この大寸法部分よりも上下方向の寸法が小さい小寸法部分とを有し、前記大寸法 部分に、前記ブレーキペダル用アームの回動中心軸が水平に挿入される孔が形成 されて ヽることを特徴とする金属管製品。  [25] The metal pipe product according to claim 23, comprising a large dimension part having a large vertical dimension and a small dimension part having a small vertical dimension smaller than the large dimension part. The metal tube product is characterized in that a hole into which the pivot center axis of the brake pedal arm is horizontally inserted is formed.
[26] 請求項 25に記載の金属管製品において、前記大寸法部分の左右方向に対面す る 2個の面は、互いに平行となった平坦面となっていることを特徴とする金属管製品。 請求項 25に記載の金属管製品において、前記大寸法部分の左右方向に対面す 2個の面は、外側へ突出した突出面となっていることを特徴とする金属管製品。 26. The metal tube product according to claim 25, wherein the two surfaces facing the left and right direction of the large dimension portion are flat surfaces parallel to each other. . 26. The metal tube product according to claim 25, wherein the two surfaces facing the left and right direction of the large dimension portion are protruding surfaces protruding outward.
PCT/JP2006/306136 2005-03-30 2006-03-27 Device and method for elliptically processing metal tube and metal tube product WO2006106622A1 (en)

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JP4418838B2 (en) 2010-02-24

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