CN112692088A - Barrel component hot extrusion die and forming method - Google Patents
Barrel component hot extrusion die and forming method Download PDFInfo
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- CN112692088A CN112692088A CN202011572594.5A CN202011572594A CN112692088A CN 112692088 A CN112692088 A CN 112692088A CN 202011572594 A CN202011572594 A CN 202011572594A CN 112692088 A CN112692088 A CN 112692088A
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- 238000001192 hot extrusion Methods 0.000 title claims abstract description 55
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- 238000001125 extrusion Methods 0.000 description 32
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- 229910000838 Al alloy Inorganic materials 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
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Abstract
The invention relates to a hot extrusion die and a forming method for a barrel component, belongs to the technical field of hot extrusion dies, and solves the problem that the deep-cavity barrel component with high ribs distributed longitudinally and transversely on the inner wall is difficult to demold during hot extrusion forming in the prior art. The hot extrusion die for the barrel component comprises an upper die core, male dies, limiting rings and a lower die, wherein the male dies comprise a left male die and a right male die and are positioned on two sides of the upper die core; the upper end face of the lower die is provided with a sliding groove. The invention solves the problem of difficult demoulding when extruding the deep-cavity barrel component with high ribs distributed longitudinally and transversely on the inner wall.
Description
Technical Field
The invention relates to the technical field of hot extrusion dies, in particular to a hot extrusion die and a forming method for a barrel component.
Background
At present, products with overall modularization, complicated appearance and light structure are more and more widely applied in the aerospace field. The deep-cavity rib cylinder structure is manufactured by adopting a hot extrusion technology for near-net forming, and compared with the original traditional technical means of plate welding, forging or casting and machining, the deep-cavity rib cylinder structure has obvious advantages in the aspects of controlling the dimensional precision and the comprehensive mechanical property of a fine structure and the like. Because the cavity in the deep-cavity cylinder body contains the criss-cross stud structure, the drawing angle of the local studs and the external curved surface after the hot extrusion and near-net forming is small, the longitudinal ribs and the transverse ribs are inconsistent in size, so that the forming is difficult, and the problem that the molded surface of the cylinder body component and the molded surface of the mold are tightly attached (namely locked) can occur in the extrusion deformation process.
Most of extrusion devices in the existing hot extrusion die technology are simple structures applied to flat plates and smooth arc plate members or extrusion devices for positively extruding inner cross rib arc plate structures, and extrusion dies for composite extrusion forming of high-rib barrel members in deep cavities are rare. Therefore, how to effectively control the dimensional accuracy of the composite extrusion formed deep-cavity high-rib cylinder member in the forming process and realize smooth and reliable demoulding after forming becomes the key direction for the research of the technicians in the field.
Disclosure of Invention
In view of the above analysis, the embodiment of the present invention is directed to provide a hot extrusion mold for a cylinder member and a forming method thereof, so as to solve the problem of difficult demolding in extruding a deep-cavity cylinder member with a longitudinally and transversely distributed high rib on an inner wall in the prior art.
On one hand, the embodiment of the invention provides a hot extrusion die for a barrel component, which is characterized by comprising an upper die core, a male die, a limiting ring and a lower die; the male dies comprise a left male die and a right male die and are positioned on two sides of the upper die core; the limiting ring comprises a left limiting ring and a right limiting ring which are respectively positioned at the outer sides of the left male die and the right male die; the male die can be coupled with the barrel member inner surface, and the lower die can be coupled with the barrel member outer surface; the upper end face of the lower die is provided with a sliding groove.
Furthermore, the outer shape of the upper die core is conical, and the taper is 1-10 degrees.
Further, the height of the outer profile of the upper die core is 300 mm-1000 mm.
Furthermore, the movement stroke of the upper die core is 50 mm-300 mm.
Furthermore, the inner cavity molded surfaces of the left male die and the right male die and the outer molded surface of the upper die core are in a wedge-shaped matching relationship.
Further, the draft angle of the left male die and the right male die is 1-5 degrees.
Furthermore, the heights of the cavity conical surfaces of the left male die and the right male die are larger than the movement stroke of the upper die core.
Furthermore, the left limit ring and the right limit ring are positioned between the left convex die and the lower die, and the left limit ring and the right limit ring are butt-jointed and combined into an annular limit structure.
Furthermore, the bottom end faces of the left limiting ring and the right limiting ring are provided with sliding rails which are matched with sliding grooves in the upper end face of the lower die.
Furthermore, the inner profiles of the left limiting ring and the right limiting ring are matched with the outer profiles of the left male die and the right male die.
Furthermore, the outer sides of the left limiting ring and the right limiting ring are respectively connected with a transmission motor or a pressure spring tool.
Furthermore, the end parts of the left limiting ring and the right limiting ring are provided with protection components connected with the lower die.
Furthermore, a sliding mechanism component is arranged in the sliding groove.
A hot extrusion forming method of a barrel component adopts the hot extrusion forming die of the barrel component to carry out hot extrusion forming of the barrel component, and comprises the following steps:
step 1: manufacturing a mould;
step 2: assembling a mould and heating a prefabricated blank;
and step 3: hot extrusion forming of the barrel component;
and 4, step 4: and (5) demolding the barrel component.
Compared with the prior art, the invention can realize at least one of the following beneficial effects:
1. the upper die core in the hot extrusion die for the barrel component is connected with the hydraulic cylinder on the hydraulic press platform, and the hydraulic press can control the pressure of the upper die core on the male die, so that the barrel component with different wall thicknesses can be formed, the forming precision of the barrel component is effectively improved, and the forming precision tolerance range of the barrel component can be controlled to be (+ 0.5-0.5) mm.
2. The male die is in a blocking form, the left male die and the right male die can move horizontally or vertically, and the left male die and the right male die are simple in structure and beneficial to processing and manufacturing.
3. The limiting ring is of a symmetrical structure, the outer side of the limiting ring is connected with a motor device or a pressure spring tool, transverse opposite or back sliding can be achieved, high-temperature-resistant cotton is attached to the inner profiles of the left limiting ring and the right limiting ring, friction resistance is reduced, rigid collision and friction between the split male die and the split limiting ring are avoided, and reliable sliding of the left male die and the right male die in the extrusion forming process is guaranteed.
4. The sliding rails are arranged on the bottom end surfaces of the left limiting ring and the right limiting ring and are correspondingly matched with the sliding grooves on the upper end surface of the lower die, the inner molded surfaces of the sliding rails and the sliding grooves can be arc-shaped or conical or wedge-shaped, the processing is simple, the wide application can be realized, and the sliding mechanism parts are arranged in the sliding grooves to ensure the quick sliding of the sliding rails.
5. The end parts of the left limiting ring and the right limiting ring are respectively provided with a protection component (such as a spring) connected with the lower die, one end of the spring is connected with the left limiting ring and the right limiting ring, and the other end of the spring is connected with the lower die, so that the left limiting ring and the right limiting ring are prevented from falling off from the lower die in the process of back movement.
6. The hot extrusion die for the barrel component provided by the invention solves the problems that the high-rib barrel component is easy to lock with an extrusion convex die and the extrusion component is difficult to separate from the upper die during the return stroke of the upper die through the design of the limit ring split sliding mechanism.
7. The design of the partitioning male die and the sliding limiting ring can meet the unloading function requirement of the structural design of a plurality of complex product extrusion dies (such as inner ring ribs, inner cavity longitudinal ribs and inner cross ribs), and a mode of 'modular die design of a split die and a motion unloading mechanism' is formed, so that the production efficiency can be obviously improved, and the comprehensive cost is reduced.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a sectional view of a front view of a hot extrusion die assembly of barrel components prior to extrusion in an embodiment of the present invention;
FIG. 2 is a schematic right-side cross-sectional view of a combined hot extrusion die for barrel components prior to extrusion in an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional front view of a hot extrusion die assembly for extruded cylindrical components according to an embodiment of the present invention;
FIG. 4 is a schematic right-side cross-sectional view of a hot extrusion die assembly of extruded tubular members according to an embodiment of the present invention;
fig. 5 is a schematic perspective view of an upper and lower die split structure of a barrel member hot extrusion combined die in an embodiment of the invention.
FIG. 6 is a schematic cross-sectional view of a transmission motor or a pressure spring tool connected to two sides of a limiting ring in the embodiment of the invention;
fig. 7 is a schematic cross-sectional view of the components of the sliding mechanism in the retainer ring according to an embodiment of the present invention.
Reference numerals:
1-upper die core; 2-lower mould; 3-a left male die; 4-right male die; 5-a left limit ring; 6-right limiting ring; 7-extruding the cylinder blank; 8-a slide rail; 9-a chute; 10-a pressure spring tool; 11-a drive motor; 12-sliding mechanism parts.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the term "connected" is to be understood broadly, and may be, for example, fixed, detachable, or integrally connected, and may be mechanically or electrically connected, and may be directly or indirectly connected through an intermediate medium, unless otherwise specifically stated or limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The terms "top," "bottom," "above … …," "below," and "on … …" as used throughout the description are relative positions with respect to components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are multifunctional, regardless of their orientation in space.
Example 1
An embodiment of the present invention, described with reference to fig. 1 to 7, discloses a barrel member hot extrusion die, including: the device comprises an upper die core 1, a male die, a limiting ring and a lower die 2.
Furthermore, the outer shape of the upper die core 1 is conical, the taper of the inclined plane is 1-10 degrees, the height of the conical surface is 300-1000 mm, the upper die core 1 and a hydraulic cylinder arranged on a hydraulic machine platform are fixedly connected into a whole through a flange and a bolt, and the maximum movement stroke of the upper die core 1 is 50-300 mm.
Further, the male dies comprise a left male die 3 and a right male die 4, the left male die 3 and the right male die 4 are symmetrically arranged and mounted on an upper die platform of the hot extrusion device, inner cavity profiles of the left male die 3 and the right male die 4 and an outer profile of the upper die core 1 are in a wedge-shaped matching relation and are matched with the taper of the outer profile of the upper die core 1, the outer profiles of the left male die 3 and the right male die 4 are matched with the inner cavity characteristics of the extrusion cylinder blank 7, the draft angle is 1-5 degrees, the height of an inner rib of the extrusion cylinder blank 7 is controlled to be 5-15 mm, and the heights of cavity conical surfaces of the left male die 3 and the right male die 4 are larger than the movement stroke of the upper die core (1) so as to ensure.
Illustratively, the taper of the inclined plane of the outer surface of the upper die core 1 is 5 degrees, the height of the conical surface is 700 mm-1000 mm, the upper die core 1 and a hydraulic cylinder arranged on a hydraulic press platform are fixedly connected into a whole through a flange and a bolt, the maximum motion stroke of the upper die core 1 is 150 mm-300 mm, the outer surfaces of the left male die 3 and the right male die 4 are matched with the characteristics of an inner cavity of an extrusion cylinder blank 7, and the draft angle of the left male die 3 and the right male die 4 is 5 degrees.
It should be noted that the pressure and the movement stroke of the upper die core 1 on the left male die 3 and the right male die 4 can be realized by setting parameters of a hydraulic press, so that the extrusion die can complete the forming of barrel components with various wall thicknesses, and realize mass production. The maximum movement stroke of the upper die core is controlled to be 150-300 mm, so that the height of the inner rib of the cylinder component can be ensured to be 5-15 mm, and the forming precision of the cylinder component is high.
Specifically, the limiting ring comprises a left limiting ring 5 and a right limiting ring 6, the left limiting ring 5 and the right limiting ring 6 are respectively positioned between the left male die 3 and the right male die 4 and the lower die 2, the height dimension of the limiting ring is matched with the height dimensions of the left male die 3, the right male die 4 and the lower die 2, the height range is 100-500 mm, the left limiting ring 5 and the right limiting ring 6 are butted and combined into a complete annular limiting structure, the inner cavity of the limiting ring is a semi-circular arc curved surface, the inner profile is matched with the outer profiles of the left male die 3 and the right male die 4, and the distance between the inner profile and the outer profiles of the left male die 3 and the right male die 4 is 0.5-1.5 mm.
Preferably, the outer sides of the left limit ring 5 and the right limit ring 6 are respectively connected with a transmission motor 11 or a pressure spring tool 10, as shown in fig. 6, for actively pushing and passively drawing the left limit ring 5 and the right limit ring 6 to move in a face-to-face or back-to-face manner, so as to finally realize the combination or separation of the left male die 3 and the right male die 4, and realize the formation of the barrel member and the complete separation of the male dies from the barrel member.
Preferably, the end faces of the bottoms of the left limiting ring 5 and the right limiting ring 6 are provided with slide rails 8 which are correspondingly matched with slide grooves 9 on the end face of the upper part of the lower die 2, the width of the upper part of each slide rail 8 is smaller than that of the lower part, and the appearance characteristics of the slide rails 8 and the slide grooves 9 can be arc-shaped, conical or wedge-shaped.
Preferably, the left limiting ring 5 and the right limiting ring 6 can be assembled into a whole by a plurality of groups of combined limiting rings with the same size and the same structure, each group of limiting rings is provided with a sliding rail 8, the width of the upper part of the sliding rail 8 is smaller than that of the lower part, and the lower die 2 is provided with a plurality of groups of sliding grooves 9 matched with the limiting rings, so that the limiting precision is improved.
Preferably, the sliding groove 9 is provided with a sliding mechanism part 12 (such as a pulley or a graphite block), and as shown in fig. 7, the inner profiles of the left and right spacing rings 5 and 6 are coated with high temperature resistant cotton to reduce friction resistance, avoid rigid collision and friction between the split male dies and the split spacing rings, and ensure reliable sliding of the left and right male dies 3 and 4 in the extrusion forming process.
It should be noted that the slide rail 8 is used for ensuring that the limiting ring 5 and the right limiting ring 6 realize the transverse movement function of the split limiting ring while ensuring the supporting and limiting functions.
Preferably, the end parts of the left and right spacing rings 5 and 6 are provided with a protection component (such as a spring, one end of the spring is connected with the left and right spacing rings 5 and 6, and the other end is connected with the lower die 2) connected with the lower die 2, so as to prevent the left and right spacing rings 5 and 6 from falling off from the lower die 2 in the process of back movement.
The center of the lower die 2 is provided with a female die cavity, and the outer surface of the inner cavity of the female die cavity is consistent with the shape of the extruded cylinder blank 7; the lower die 2 is fastened and connected with a lower die platform of the hot extrusion forming equipment through bolts, pressing plates and the like.
As shown in fig. 1-2, before hot extrusion forming, the left male die 3 and the right male die 4 are combined into a whole, the upper die core 1 drives the left male die 3 and the right male die 4 to move downwards, and the extruded cylinder blank 7 is coupled with the lower die 2 under the action of the left male die 3 and the right male die 4, so that the composite hot extrusion forming of the cylinder extruded blank is completed. That is, during the downward movement of the upper mold core 1, the left punch 3 and the right punch 4 move toward the lower mold 2, respectively, until the barrel blank 7 is extruded.
In consideration of the fact that when the barrel part is subjected to hot extrusion forming, demoulding is difficult due to the influence of the raised part of the part, the male die is in a blocking form.
During hot extrusion forming, as shown in fig. 3, the upper die core 1 moves downwards to drive the left male die 3 and the right male die 4 to respectively move in opposite directions in the radial direction of the lower die 2, and the slide rails 8 slide back to back along the slide grooves 9 under the action of the male dies by the left limit ring 5 and the right limit ring 6 until the hot extrusion forming is finished.
During demoulding, as shown in fig. 4, the hydraulic machine drives the upper die core 1 to move upwards in a return stroke, the slide rails 8 on the left limiting ring 5 and the right limiting ring 6 slide in opposite directions along the fixed slide grooves 9 under the action of the transmission motors 11 or the pressure spring tools 10 on two distributed sides, and continue to move in opposite directions after contacting the structures of the left male die 3 and the right male die 4 until the left male die 3 and the right male die 4 are combined into a whole, the upper die core 1 is kept at a fixed position, the left limiting ring 5 and the right limiting ring 6 keep a certain equipment pressure, and the extruded cylinder blank 7 is separated from the left male die 3 and the right male die 4.
And then, the upper die core 1 continues to move upwards under the action of the hydraulic machine, the upper die platform drives the left male die 3 and the right male die 4 which are combined into a whole to move upwards in a return stroke, the left limiting ring 5 and the right limiting ring 6 are limited by the transmission motor 11 or the pressure spring tool 10 and continue to be fixed, the left male die 3 and the right male die 4 are drawn out of the inner cavity of the extrusion cylinder blank 7 under the action of the upper die platform, the left male die 3 and the right male die 4 move upwards to the highest point of the extrusion cylinder blank 7 and are completely separated from the extrusion cylinder blank 7, and the slide rails 8 on the left limiting ring 5 and the right limiting ring 6 move backwards along the slide grooves 9 under the action of the transmission motors 11 or the pressure spring tools 10 on two sides of the distribution until the left limiting ring 5 and the right limiting ring 6 completely avoid the interference area of the extrusion cylinder blank 7 in the.
Compared with the prior art, the upper die core in the hot extrusion die for the barrel component is connected with the hydraulic cylinder on the hydraulic press platform, the hydraulic press can control the pressure of the upper die core on the male die, the barrel component with different wall thicknesses is formed, and the forming precision of the barrel component can be effectively improved by accurately controlling the pressure. The male die is in a blocking form, the left male die and the right male die can move horizontally or vertically, and the left male die and the right male die are simple in structure and beneficial to processing and manufacturing. The limiting ring is of a symmetrical structure, the outer side of the limiting ring is connected with a transmission motor or a pressure spring tool to realize transverse opposite or back sliding, the left limiting ring and the right limiting ring are provided with sliding mechanism parts of a self-lubricating system, and the inner profile is pasted with high-temperature-resistant cotton to reduce friction resistance, avoid rigid collision and friction between the split male die and the split limiting ring, and ensure reliable sliding of the left male die and the right male die in the extrusion forming process. The end surfaces of the bottoms of the left limiting ring and the right limiting ring are provided with sliding rails which are correspondingly matched with the sliding grooves on the end surface of the upper part of the lower die, the inner molded surfaces of the sliding rails and the sliding grooves can be arc-shaped or conical or wedge-shaped, the processing is simple, and the wide application can be realized. The end parts of the left limiting ring and the right limiting ring are respectively provided with a protection component (such as a spring) connected with the lower die, one end of the spring is connected with the left limiting ring and the right limiting ring, and the other end of the spring is connected with the lower die, so that the left limiting ring and the right limiting ring are prevented from falling off from the lower die in the process of back movement.
Example 2
The embodiment provides a method for forming a barrel member hot extrusion die, which mainly adopts the barrel member hot extrusion die provided in embodiment 1 to perform composite hot extrusion forming on a barrel extrusion blank, and is described with reference to fig. 1 to 4, and includes:
step 1: and (5) manufacturing a mould. And manufacturing and processing the hot extrusion die according to the three-dimensional model of the barrel component to be formed. The hot extrusion die includes: the die comprises an upper die core 1, a male die, a limiting ring and a lower die 2, wherein the male die comprises a left male die 3 and a right male die 4, and the limiting ring comprises a left limiting ring 5 and a right limiting ring 6 which are arranged in bilateral symmetry. The bottom end surfaces of the left limiting ring 5 and the right limiting ring 6 are provided with slide rails 8, and the upper end surface of the lower die 2 is provided with a slide groove 9. According to the shape of the barrel component to be processed, the shapes of the male die outer molded surface and the female die inner molded surface for manufacturing the hot extrusion die are different.
Specifically, the mold material is made of heat-resistant mold steel, and considering that the mold material and the barrel member are different in material and different in thermal expansion coefficient, a thermal deformation difference exists when the mold and the barrel member are subjected to hot press forming, and therefore the mold needs to be enlarged or reduced according to actual conditions. In the invention, when the die material is heat-resistant die steel and the extrusion blank is aluminum alloy, the design size of the hot extrusion die needs to be amplified, and the amplification factor is 60/00。
Step 2: die assembly and preform heating. The prefabricated blank is placed in an inner cavity of a lower die 2, a left male die 3 and a right male die 4 are combined into a whole, a combined structure of the left male die 3 and the right male die 4 is arranged in the blank inner cavity by adopting hoisting equipment, a left limit ring 5 and a right limit ring 6 are assembled with a sliding groove 9 on the lower die 2 through a wedge-shaped sliding rail 8, the upper surfaces of the left male die 3 and the right male die 4 are placed in, the die and the blank are heated to a certain temperature and set for fixed heat preservation time, and after the die and the blank reach the set temperature and time, the combined die and the blank are connected and fixed with a hot extrusion forming equipment platform through hoisting and transferring equipment.
And step 3: the barrel member is hot extruded. The upper die core 1 is loaded into a cavity in the middle of the left male die 3 and the right male die 4 along with the equipment platform, downlink parameters are set on an operation table at the front end of an equipment control system, the upper die core 1 moves along with the equipment platform to drive the left male die 3 and the right male die 4 to move transversely in a back direction, the left limiting ring 5 and the right limiting ring 6 slide back to back along the fixed sliding groove 9 under the action of the left male die 3 and the right male die 4 until a barrel blank is extruded and formed.
And 4, step 4: and (5) demolding the barrel component. The hydraulic press platform drives the upper die core 1 to move upwards in a return stroke, the slide rails 8 on the left limiting ring 5 and the right limiting ring 6 fixedly slide along the slide groove 9 in opposite directions under the action of the transmission motors 11 or the pressure spring tools 10 on two distributed sides, and continue to move in opposite directions after contacting the matching surfaces of the structures of the left male die 3 and the right male die 4 until the left male die 3 and the right male die 4 are combined into a whole, certain equipment pressure and the position of the limiting rings are kept, the extrusion cylinder blank 7 is completely separated from the male die structures, then, the upper die platform drives the left male die 3 and the right male die 4 which are combined into a whole to move upwards in a return stroke, the left limiting ring and the right limiting ring are limited by the equipment such as the transmission motors 11 or the pressure spring tools 10 and keep fixed, when the left male die 3 and the right male die 4 move upwards to the highest point of the extrusion cylinder blank 7, under the action of a transmission motor 11 or a pressure spring tool 10 on two sides of the left limiting ring 5 and the right limiting ring 6, a sliding groove 9 moves in a back direction until the left limiting ring 5 and the right limiting ring 6 completely avoid a vertical movement space interference area of an extrusion cylinder blank 7 in a lower die cavity, the extrusion cylinder blank 7 is separated from an inner die cavity of the lower die 2, and finally the extrusion cylinder blank 7 is taken out by adopting a mechanical arm or a simple clamp and other equipment.
Compared with the prior art, the hot extrusion die for the barrel component and the forming method provided by the invention solve the problems that the barrel component is easy to lock with an extrusion convex die and the extrusion component is difficult to separate from an upper die during return stroke of the upper die through the design of the limit ring split sliding mechanism. The design of the partitioning male die and the sliding limiting ring can meet the unloading function requirement of the structural design of a plurality of complex product extrusion dies (such as inner ring ribs, inner cavity longitudinal ribs and inner cross ribs), and a mode of 'modular die design of a split die and a motion unloading mechanism' is formed, so that the production efficiency can be obviously improved, and the comprehensive cost is reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A hot extrusion die for a barrel component is characterized by comprising an upper die core (1), a male die, a limiting ring and a lower die (2); the male dies comprise a left male die (3) and a right male die (4) and are positioned on two sides of the upper die core (1); the limiting ring comprises a left limiting ring (5) and a right limiting ring (6) which are respectively positioned on the outer sides of the left male die (3) and the right male die (4); the male die can be coupled with the inner surface of the barrel member, and the lower die (2) can be coupled with the outer surface of the barrel member; the upper end surface of the lower die (2) is provided with a chute (9).
2. The barrel member hot extrusion die of claim 1, wherein the outer shape of the upper die core (1) is conical, and the taper is 1 ° to 10 °.
3. The barrel member hot extrusion die as claimed in claim 2, wherein the outer profile height of the upper die core (1) is 300mm to 1000 mm.
4. The barrel member hot extrusion die as claimed in claim 2, wherein the movement stroke of the upper die core (1) is 50mm to 300 mm.
5. The barrel member hot extrusion die according to claim 1, wherein the inner cavity profiles of the left male die (3) and the right male die (4) and the outer profile of the upper die core (1) are in a wedge-shaped fit relationship.
6. The barrel member hot extrusion die according to claim 1, wherein the draft angles of the left male die (3) and the right male die (4) are 1 ° to 5 °.
7. The barrel member hot extrusion die according to claim 4, wherein the cavity taper heights of the left male die (3) and the right male die (4) are larger than the designed movement stroke of the upper die core (1).
8. The barrel component hot extrusion die of claim 1, wherein the bottom end surfaces of the left limiting ring (5) and the right limiting ring (6) are provided with slide rails (8) which are matched with slide grooves (9) on the upper end surface of the lower die (2).
9. The barrel member hot extrusion die of claim 1, wherein the inner profiles of the left and right retainer rings (5, 6) are matched with the outer profiles of the left and right punches (3, 4).
10. A method for hot extrusion molding of a barrel member, characterized in that the hot extrusion molding of the barrel member using the barrel member hot extrusion die according to any one of claims 1 to 9, comprises:
step 1: manufacturing a mould;
step 2: assembling a mould and heating a preset material;
and step 3: hot extrusion forming of the barrel component;
and 4, step 4: and (5) demolding the barrel component.
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| CN202011572594.5A CN112692088A (en) | 2020-12-23 | 2020-12-23 | Barrel component hot extrusion die and forming method |
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| CN114273520A (en) * | 2021-12-01 | 2022-04-05 | 中北大学 | Drawing forming die for cylindrical part with internal grid ribs and using method thereof |
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