Composite die integrating trimming, punching and shaping

Abstract

The invention discloses a composite die integrating trimming, punching and shaping, which integrates a trimming knife edge for trimming a forge piece, an upper trimming punch for shaping the forge piece, a lower trimming punch for shaping the forge piece and a punching punch for punching the forge piece on one set of die; a punching punch is integrated on an upper trimming punch, the upper trimming punch can be vertically and slidably arranged in a punching receding hole of a trimming mounting plate, and a first compression spring is arranged between the upper end of the upper trimming punch and an upper die mounting plate in an abutting mode, so that when an upper die moves downwards to cut off flashes of forgings through a trimming knife edge, the upper trimming punch is not prone to falling off; the upper trimming punch can properly and relatively move upwards under the condition that the upper trimming punch abuts against the forge piece, so that trimming, shaping and punching are carried out in order, and the whole punching stroke can be shortened easily. According to the composite die, the problems that an existing forging die is single in function and low in integration degree can be effectively solved, the machining efficiency can be improved, and the production cost can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a composite mould integrating trimming, punching and shaping. Background Art

[0002] Aluminum alloy forgings are widely used in various fields due to their advantages such as light weight, high strength and good corrosion resistance. In the existing forging industry, the manufacturing process of aluminum alloy forgings is generally: blank making, pre-forging, final forging, trimming, punching and shaping, with a total of six process steps; among them, the three process steps of blank making, pre-forging and final forging can be completed on the same hot die forging press, or on two or three friction presses; and the three process steps of trimming, punching and shaping generally need to be completed on three presses equipped with corresponding molds, and these molds only have the function of completing the corresponding process steps. For example, the aluminum alloy trimming die disclosed in Chinese patent CN214442711U only has the function of completing the trimming process of aluminum alloy forgings, such as the new aluminum alloy punching and expanding die disclosed in Chinese patent CN215237187U, which only has the function of completing the punching process of aluminum alloy forgings. The single function and low integration of the mold are the main reasons why the three process steps of trimming, punching and shaping of aluminum alloy forgings need to be carried out separately. Carrying out these three process steps separately not only leads to a large number of equipment and molds required for production, high cost, long cycle and low efficiency, but also requires additional intermediate processes between each process step to coordinate the transition, making it difficult to control the processing process and ensure the processing accuracy. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a composite die integrating trimming, punching and shaping, so as to solve the technical problems of the existing forging dies having single functions and low integration, and to achieve the effect of improving processing efficiency and reducing production costs.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A composite die integrating trimming, punching and shaping, comprising an upper die and a lower die for use together; the upper die comprises a transverse upper die mounting plate, a trimming mounting plate is connected to the lower side of the upper die mounting plate, the trimming mounting plate and the upper die mounting plate are arranged in parallel and spaced apart, a punching clearance hole is provided through the middle of the trimming mounting plate, a trimming blade is formed on the lower edge of the hole wall of the punching clearance hole; a trimming upper punch is provided in the punching clearance hole for vertical sliding, the upper end of the trimming upper punch is higher than the trimming mounting plate and has a circle of transverse flanges, the transverse flanges are connected to the trimming mounting plate Vertically abutted, a first compression spring is provided between the upper end of the trimming upper punch and the upper die mounting plate, and an upper model cavity with a mouth facing downward is formed at the lower end of the trimming upper punch; a vertically arranged punch mounting hole with a mouth facing downward is provided on the trimming upper punch, a punching punch is provided in the punch mounting hole, and the tail of the punching punch is lower than the lowest point of the upper model cavity; the lower die includes a horizontal lower die mounting plate, and a trimming lower punch matching the trimming upper punch is connected above the lower die mounting plate, and a lower model cavity with a mouth facing upward is formed at the upper end of the trimming lower punch.

[0005] Furthermore, an upper punch mounting plate covering the stamping clearance hole is abutted above the trimming mounting plate, and a portion of the upper punch mounting plate located outside the stamping clearance hole in the lateral direction is formed as the said lateral flange, and the trimming upper punch is detachably connected to the lower part of the upper punch mounting plate by bolts, and a first compression spring is abutted between the upper punch mounting plate and the upper die mounting plate.

[0006] Furthermore, a guide rod is vertically provided between the upper punch mounting plate and the upper die mounting plate, the upper end of the guide rod is connected to the upper die mounting plate, a guide hole is vertically penetrated through the upper punch mounting plate, the lower end of the guide rod passes through the guide hole and abuts against the trimming mounting plate, and the guide rod slides in cooperation with the guide hole.

[0007] Furthermore, the punching punch is a shoulder punch with a shoulder on the head, the punch mounting hole vertically penetrates the trimming upper punch, and the upper end of the punch mounting hole has an expanded hole adapted to the shoulder, and the shoulder is vertically abutted against the lower surface of the upper punch mounting plate and the bottom surface of the expanded hole respectively.

[0008] Furthermore, a trimming mounting groove surrounding the punched clearance hole is provided on the lower surface of the trimming mounting plate, and a knife edge plate of matching shape is provided in the trimming mounting groove. The hole wall of the knife edge plate is flush with the hole wall of the punched clearance hole, and the trimming upper punch is vertically slidably set in the inner hole of the knife edge plate and the punched clearance hole. The lower edge of the hole wall of the knife edge plate forms the trimming blade, and the knife edge plate is detachably connected to the trimming mounting plate by bolts.

[0009] Furthermore, two support plates are vertically abutted between the upper die mounting plate and the trimming mounting plate. The two support plates are arranged in parallel and spaced apart. The upper punch mounting plate is located between the two support plates. The support plates are detachably connected to the upper die mounting plate and the trimming mounting plate by bolts.

[0010] Furthermore, a lower punch mounting plate is detachably connected above the lower die mounting plate via bolts, and the trimming lower punch is detachably connected above the lower punch mounting plate via bolts.

[0011] Furthermore, a guide sleeve is vertically provided on the lower side of the trimming mounting plate, and a guide column matching the guide sleeve is vertically provided on the upper side of the lower punch mounting plate. When the upper die and the lower die are used in combination, the upper end of the guide column is located in the guide sleeve and slides in conjunction.

[0012] Furthermore, a stripping plate is arranged parallelly and spaced above the lower punch mounting plate, and a stripping hole matching the outer contour of the trimming lower punch is provided in the middle of the stripping plate. The trimming lower punch is located in the stripping hole and slides in cooperation with the hole, and a second compression spring is vertically abutted between the stripping plate and the lower punch mounting plate, and the second compression spring is connected to the stripping plate.

[0013] Furthermore, the first compression spring is a helical compression spring, and the second compression spring is a polyurethane spring.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The composite die of the present invention not only integrates a trimming blade for trimming forgings, a trimming upper punch for shaping forgings, a trimming lower punch and a punching punch for punching forgings into a set of dies; and by integrating the punching punch into the trimming upper punch, the trimming upper punch is vertically slidably arranged in the stamping clearance hole of the trimming mounting plate, and a first compression spring is abutted between the upper end of the trimming upper punch and the upper die mounting plate, so that when the upper die moves downward to cut off the flash of the forging through the trimming blade, the trimming upper punch can be appropriately relatively moved upward under the condition of abutting with the forging, so that the trimming and shaping punching can be carried out in an orderly manner, and it is beneficial to shorten the entire stamping stroke; the composite die of the present invention can effectively solve the problems of single function and low integration of existing forging dies, which is beneficial to improving processing efficiency and reducing production costs.

[0015] 2. In the composite mold of the present invention, the upper trimming punch, the lower trimming punch, the punching punch and the cutting edge plate providing the trimming cutting edge can all be disassembled and replaced according to the forgings to be processed, making the composite mold more flexible to use and helping to improve the practicality of the composite mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of the composite mold in the embodiment in a matching use state; Figure 2 A three-dimensional diagram of the upper mold and the lower mold in the separated state according to the embodiment; Figure 3 A cross-sectional view of the upper die according to the embodiment, cut along the axis of the punch Figure 4 It is a cross-sectional view of the upper die according to the embodiment cut along the axis of the guide rod; Figure 5 FIG. A is an exploded schematic diagram of the upper mold described in the embodiment; Figure 6 FIG. B is an exploded schematic diagram of the upper mold described in the embodiment; Figure 7 A three-dimensional diagram of the lower mold described in the embodiment; Figure 8 It is an exploded schematic diagram of the lower mold described in the embodiment; Fig. 9 is a three-dimensional diagram C of the forging to be processed according to the embodiment; Fig.10 is a three-dimensional view D of the forging to be processed according to the embodiment; Among them, the upper die mounting plate 1, the trimming mounting plate 2, the stamping clearance hole 3, the trimming blade 4, the trimming upper punch 5, the first compression spring 6, the upper model cavity 7, the punch mounting hole 8, the punch 9, the lower die mounting plate 10, the trimming lower punch 11, the lower model cavity 12, the upper punch mounting plate 13, the guide rod 14, the guide hole 15, the trimming mounting groove 16, the blade plate 17, the support plate 18, the connecting plate 19, the accommodating groove 20, the guide mounting hole 21, the guide ring platform 22, the upper punch mounting groove 23, the lower punch mounting plate 24, the guide sleeve 25, the guide column 26, the stripping plate 27, the stripping clearance hole 28, the second compression spring 29, and the lower punch mounting groove 30. DETAILED DESCRIPTION

[0017] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] Example: See also Figure 1 and Figure 2 , a composite die integrating trimming, punching and shaping, including an upper die and a lower die for matching use; see Figure 3 The upper die includes a horizontal upper die mounting plate 1, and a trimming mounting plate 2 is connected below the upper die mounting plate 1. The trimming mounting plate 2 is arranged parallel to the upper die mounting plate 1, see Figure 5 A punching hole 3 is formed through the middle of the trimming installation plate 2, and a trimming edge 4 is formed on the lower edge of the hole wall of the punching hole 3; see Figure 3 A trimming upper punch 5 is vertically slidably arranged in the punching hole 3. The upper end of the trimming upper punch 5 is higher than the trimming mounting plate 2 and has a circle of transverse flanges. The transverse flanges are vertically abutted against the trimming mounting plate 2. A first compression spring 6 is abutted between the upper end of the trimming upper punch 5 and the upper die mounting plate 1. Please refer to Figure 2 , the lower end of the trimming upper punch 5 forms an upper mold cavity 7 with a downward opening; see Figure 3 and Figure 6The trimming upper punch 5 has a punch mounting hole 8 which is vertically arranged and has its mouth facing downwards, and a punching punch 9 is arranged in the punch mounting hole 8, and the tail of the punching punch 9 is lower than the lowest point of the upper mold cavity 7; see Figure 7 The lower die includes a transverse lower die mounting plate 10, and a trimming lower punch 11 matching the trimming upper punch 5 is connected above the lower die mounting plate 10, and a lower model cavity 12 with an upward mouth is formed at the upper end of the trimming lower punch 11; in this embodiment, the first compression spring 6 is a spiral compression spring, and there are multiple and rectangular distributions, the upper model cavity 7 is a convex die cavity with a downward protrusion in the middle, the punch mounting hole 8 is located in the middle of the upper model cavity 7, and the lower model cavity 12 is a concave die cavity matching the upper model cavity 7. Correspondingly, the forging to be processed corresponding to the composite die described in this embodiment is as follows Fig. 9 and Fig.10 shown.

[0019] The composite die integrated with trimming, punching and shaping of the present invention is used to install the upper die on the upper die mounting seat of the stamping equipment through the upper die mounting plate 1, and install the lower die on the lower die mounting seat of the stamping equipment through the lower die mounting plate 10, and place the forging to be processed on the trimming lower punch 11, and make the forging to be processed cooperate with the lower model cavity 12; the stamping equipment drives the upper die to move downward as a whole through the upper die mounting plate 1, and the upper model cavity 7 of the trimming upper punch 5 cooperates with the forging to fix the forging, and the upper die continues to move downward as a whole and cuts off the flash around the forging through the trimming blade 4; in the trimming process, the trimming upper punch 5 is vertically abutted against the forging, and the trimming upper punch 5 will The upper die 1 is pressed against the upper die 2 and the upper die 3 is pressed against the upper die 2. The upper die 2 is pressed against the upper die 2 and the upper die 3 is pressed against the upper die 2. The upper die 2 is pressed against the upper die 2 and the upper die 3 is pressed against the upper die 2.

[0020] The present invention not only integrates the trimming blade 4 for trimming forgings, the trimming upper punch 5 for shaping forgings, the trimming lower punch 11 and the punching punch 9 for punching forgings into a set of dies; and by integrating the punching punch 9 into the trimming upper punch 5, the trimming upper punch 5 is vertically slidably arranged in the stamping clearance hole 3 of the trimming mounting plate 2, and a first compression spring 6 is abutted between the upper end of the trimming upper punch 5 and the upper die mounting plate 1, so that when the upper die moves downward to cut off the flash of the forging through the trimming blade 4, the trimming upper punch 5 can be appropriately moved upward relatively when abutting against the forging, so that trimming and shaping punching can be carried out in an orderly manner; the composite die of the present invention can effectively solve the problems of single function and low integration of existing forging dies, which is beneficial to improving processing efficiency and reducing production costs.

[0021] See also Figure 3 and Figure 6 An upper punch mounting plate 13 covering the stamping clearance hole 3 is abutted against the top of the trimming mounting plate 2, and the portion of the upper punch mounting plate 13 located outside the stamping clearance hole 3 in the transverse direction is formed as the said transverse flange, and the trimming upper punch 5 is detachably connected to the bottom of the upper punch mounting plate 13 by bolts, and the first compression spring 6 is abutted and arranged between the upper punch mounting plate 13 and the upper die mounting plate 1; in this embodiment, the trimming upper punch 5 is detachably connected to the bottom of the upper punch mounting plate 13 by a bolt that vertically penetrates the upper punch mounting plate 13 with the tail facing downward, and the bolt and the first compression spring 6 are staggered on the upper punch mounting plate 13.

[0022] In this way, not only can a plurality of replaceable trimming upper punches 5 be provided according to needs, but also when the specifications of the forgings to be processed change, the trimming upper punch 5 can be removed and replaced by unscrewing the bolts on the upper punch mounting plate 13, thereby making the composite mold more flexible to use; and the upper punch mounting plate 13 is provided to form a transverse flange for limiting the trimming upper punch 5 from downwardly disengaging from the stamping clearance hole 3, and replacing the upper end of the trimming upper punch 5 to abut against the first compression spring 6, so that when the trimming upper punch 5 is removed and replaced, the arrangement of the first compression spring 6 will not be affected, thereby making the composite mold easier to use.

[0023] See also Figure 4 and Figure 5 A guide rod 14 is also vertically provided between the upper punch mounting plate 13 and the upper die mounting plate 1. The upper end of the guide rod 14 is connected to the upper die mounting plate 1. A guide hole 15 is vertically penetrated on the upper punch mounting plate 13. The lower end of the guide rod 14 passes through the guide hole 15 and abuts against the trimming mounting plate 2. The guide rod 14 and the guide hole 15 are slidably matched. In this embodiment, an accommodating hole for accommodating the lower end of the guide rod 14 is opened on the upper surface of the trimming mounting plate 2. There are multiple guide rods 14 and they are distributed in a rectangular shape.

[0024] In this way, when the upper punch mounting plate 13 and the trimming upper punch 5 move upward relative to the trimming mounting plate 2, the guide rod 14 slides in the guide hole 15 to play a guiding role, which can prevent the trimming upper punch 5 from swinging horizontally when moving vertically, thereby ensuring smooth shaping and punching, which is beneficial to improving the stability of the shaping and punching actions.

[0025] See also Figure 3 and Figure 6 The punching punch 9 is a shoulder punch with a shoulder on the head. The punch mounting hole 8 vertically penetrates the trimming upper punch 5, and the upper end of the punch mounting hole 8 has an expanded hole adapted to the shoulder. The shoulder is vertically abutted against the lower surface of the upper punch mounting plate 13 and the bottom surface of the expanded hole respectively.

[0026] In this way, after unscrewing the bolts on the upper punch mounting plate 13 and separating the trimming upper punch 5 from the upper punch mounting plate 13, the punching punch 9 can also be taken out from the punch mounting hole 8, thereby realizing the replacement of the punching punch 9, making the composite mold more convenient and flexible to use.

[0027] See also Figure 4 and Figure 5 The lower surface of the trimming mounting plate 2 is provided with a trimming mounting groove 16 surrounding the stamping clearance hole 3, and a knife edge plate 17 of matching shape is provided in the trimming mounting groove 16. The hole wall of the knife edge plate 17 is flush with the hole wall of the stamping clearance hole 3, and the trimming upper punch 5 is vertically slidably set in the inner hole of the knife edge plate 17 and the stamping clearance hole 3. The lower edge of the hole wall of the knife edge plate 17 forms the trimming knife edge 4, and the knife edge plate 17 is detachably connected to the trimming mounting plate 2 by bolts; in this embodiment, the knife edge plate 17 is detachably connected to the trimming mounting plate 2 by bolts that vertically penetrate itself with the tail facing upward.

[0028] In this way, a cutting edge plate 17 detachably connected to the trimming mounting plate 2 is provided to form the trimming cutting edge 4. When the specifications of the forging are changed, the cutting edge plate 17 can be removed and replaced by unscrewing the bolts on the cutting edge plate 17 to change the trimming cutting edge 4 accordingly, making the composite mold more flexible to use. In addition, a trimming mounting groove 16 is provided to facilitate installation and positioning when replacing the cutting edge plate 17, which is beneficial to improving the reliability of the composite mold.

[0029] See also Figure 3 and Figure 5 Two support plates 18 are vertically connected between the upper die mounting plate 1 and the trimming mounting plate 2. The two support plates 18 are arranged in parallel and spaced apart. The upper punch mounting plate 13 is located between the two support plates 18. The support plates 18 are detachably connected to the upper die mounting plate 1 and the trimming mounting plate 2 by bolts.

[0030] In this way, the upper mold mounting plate 1 and the trimming mounting plate 2 are kept parallel and spaced apart by the support plate 18, and the upper mold mounting plate 1 and the trimming mounting plate 2 can be separated by unscrewing the bolts, so as to facilitate the installation and disassembly of components such as the upper punch mounting plate 13, the first compression spring 6 and the guide rod 14 therebetween, making the composite mold more convenient and flexible to use.

[0031] In this embodiment, see Figure 2 and Figure 3 A connecting plate 19 is also provided between the upper die mounting plate 1 and the trimming mounting plate 2. The connecting plate 19 is located above the upper punch mounting plate 13 and is parallel and spaced apart. The connecting plate 19 is connected to the upper die mounting plate 1 by bolts. Figure 3 , Figure 5 and Figure 6 The first compression spring 6 is disposed between the connecting plate 19 and the upper punch mounting plate 13, and the connecting plate 19 and the upper punch mounting plate 13 are respectively provided with a receiving groove 20 for accommodating the end of the first compression spring 6, so as to prevent the first compression spring 6 from moving laterally during the operation; see Figure 4 The connecting plate 19 is also provided with a connecting hole, the upper end of which has an expanded hole, the upper end of the guide rod 14 is located in the connecting hole, and the upper end of the guide rod 14 has a shoulder and is located in the expanded hole, so that the guide rod 14 is detachably connected to the upper mold mounting plate 1. When the connecting plate 19 is abutted and connected to the upper mold mounting plate 1, the upper end of the guide rod 14 is vertically abutted against the upper mold mounting plate 1 and the connecting plate 19, respectively, so that the guide rod 14 is vertically fixed; see Figure 4 and Figure 5 A guide mounting hole 21 is also provided through the upper punch mounting plate 13, and a guide ring 22 is provided in the guide mounting hole 21. The guide ring 22 has a vertical through hole and serves as the guide hole 15. The guide ring 22 is detachably connected to the upper punch mounting plate 13 by bolts; the guide ring 22 is preferably made of a material with good wear resistance and is positioned and installed on the upper punch mounting plate 13 through the guide mounting hole 21, which is beneficial to improving the guiding accuracy and durability of the guide rod 14; see Figure 5 The lower surface of the upper punch mounting plate 13 is provided with an upper punch mounting groove 23 which is compatible with the upper end of the trimming upper punch 5 so as to realize the positioning and installation of the trimming upper punch 5; in this way, the two connected components are connected in an inlaid type, which is beneficial to reduce assembly errors and improve processing accuracy.

[0032] See also Figure 7 and Figure 8A lower punch mounting plate 24 is detachably connected to the top of the lower die mounting plate 10 by bolts, and the trimming lower punch 11 is detachably connected to the top of the lower punch mounting plate 24 by bolts; in this embodiment, the lower punch mounting plate 24 is connected to the lower die mounting plate 10 by bolts that vertically penetrate itself with the tail facing downward, and the lower punch mounting plate 24 is connected to the trimming lower punch 11 by bolts that vertically penetrate itself with the tail facing upward; the upper surface of the lower punch mounting plate 24 is provided with a lower punch mounting groove 30 that is compatible with the lower end of the trimming lower punch 11, so as to realize the positioning and installation of the trimming lower punch 11.

[0033] In this way, when the specifications of the forgings are changed, the lower punch mounting plate 24 can be separated from the lower die mounting plate 10 by unscrewing the bolts with the tails facing downward, and then the bolts with the tails facing upward can be turned to separate the trimming lower punch 11 from the lower punch mounting plate 24, thereby realizing the disassembly and replacement of the trimming lower punch 11, which is beneficial to improving the flexibility of use of the composite mold.

[0034] See also Figure 1 and Figure 2 A guide sleeve 25 is vertically provided on the lower side of the trimming mounting plate 2, and a guide column 26 matching the guide sleeve 25 is vertically provided on the upper side of the lower punch mounting plate 24. When the upper die and the lower die are used in combination, the upper end of the guide column 26 is located in the guide sleeve 25 and slides in cooperation.

[0035] In this way, when the punching equipment drives the upper die to move downward, the guide column 26 cooperates with the guide sleeve 25 to play a guiding role to avoid lateral deviation between the upper die and the lower die, which is beneficial to improving the processing accuracy.

[0036] See also Figure 7 and Figure 8 A stripping plate 27 is arranged parallel and spaced above the lower punch mounting plate 24, and a second compression spring 29 is vertically abutted between the stripping plate 27 and the lower punch mounting plate 24. The second compression spring 29 is connected to the stripping plate 27 so that the stripping plate 27 can move vertically under the elastic force of the second compression spring 29. A stripping hole 28 matching the outer contour of the trimming lower punch 11 is provided in the middle of the stripping plate 27, and the trimming lower punch 11 is located in the stripping hole 28. During implementation, in order to facilitate the placement of forgings on the trimming lower punch 11, the stripping plate 27 should be lower than the upper end of the trimming lower punch 11 or be flush with the height.

[0037] In this way, during the trimming process, the stripping plate 27 is abutted by the trimming blade 4 and moves downward, thereby compressing the second compression spring 29. When the stamping is completed and the upper mold moves up and reset, the stripping plate 27 rebounds upward under the elastic force of the second compression spring 29, so that the cut flash moves upward and separates from the trimming lower punch 11, avoiding the flash from getting stuck in the mold, thereby reducing the difficulty of cleaning the flash.

[0038] In this embodiment, the second compression spring 29 adopts a polyurethane spring. The polyurethane spring not only has good durability, heat resistance, corrosion resistance and safety, but also compared with the spiral compression spring, the polyurethane spring is cylindrical, has no gap for compression in the axial direction, and will not be stuck by the burrs, which is beneficial to improving the safety of the composite mold.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A composite mold integrating trimming, punching and shaping, characterized in that: The upper die comprises an upper die and a lower die for use in combination; the upper die comprises a transverse upper die mounting plate, a trimming mounting plate is connected to the lower portion of the upper die mounting plate, the trimming mounting plate and the upper die mounting plate are arranged in parallel and spaced apart, a punching clearance hole is provided through the middle of the trimming mounting plate, a trimming blade is formed on the lower edge of the hole wall of the punching clearance hole; a trimming upper punch is provided for vertical sliding in the punching clearance hole, the upper end of the trimming upper punch is higher than the trimming mounting plate and has a circle of transverse flanges, the transverse flanges are vertically abutted against the trimming mounting plate, and the trimming upper punch A first compression spring is provided between the upper end of the head and the upper die mounting plate, and an upper model cavity with a mouth facing downward is formed at the lower end of the trimming upper punch; a vertically arranged punch mounting hole with a mouth facing downward is provided on the trimming upper punch, a punch mounting hole is provided in the punch mounting hole, and a tail of the punch is lower than the lowest point of the upper model cavity; the lower die includes a horizontal lower die mounting plate, and a trimming lower punch matching the trimming upper punch is connected above the lower die mounting plate, and a lower model cavity with a mouth facing upward is formed at the upper end of the trimming lower punch.

2. A composite mold integrating trimming, punching and shaping according to claim 1, characterized in that: An upper punch mounting plate covering the stamping clearance hole is abutted above the trimming mounting plate, and the portion of the upper punch mounting plate located outside the stamping clearance hole in the lateral direction is formed as the said lateral flange, and the trimming upper punch is detachably connected to the lower part of the upper punch mounting plate by bolts, and a first compression spring is abutted between the upper punch mounting plate and the upper die mounting plate.

3. A composite mold integrating trimming, punching and shaping according to claim 2, characterized in that: A guide rod is also vertically provided between the upper punch mounting plate and the upper die mounting plate. The upper end of the guide rod is connected to the upper die mounting plate. A guide hole is vertically penetrated through the upper punch mounting plate. The lower end of the guide rod passes through the guide hole and abuts against the trimming mounting plate. The guide rod slides in cooperation with the guide hole.

4. The composite mold integrating trimming, punching and shaping according to claim 2, characterized in that: The punching punch is a shoulder punch with a shoulder on the head. The punch mounting hole vertically penetrates the trimming upper punch, and the upper end of the punch mounting hole has an expanded hole adapted to the shoulder. The shoulder is vertically abutted against the lower surface of the upper punch mounting plate and the bottom surface of the expanded hole respectively.

5. The composite mold integrating trimming, punching and shaping according to claim 1, characterized in that: The lower surface of the trimming mounting plate is provided with a trimming mounting groove surrounding the stamped clearance hole, and a knife edge plate of matching shape is provided in the trimming mounting groove. The hole wall of the knife edge plate is flush with the hole wall of the stamped clearance hole, and the trimming upper punch is vertically slidably set in the inner hole of the knife edge plate and the stamped clearance hole. The lower edge of the hole wall of the knife edge plate forms the trimming knife edge, and the knife edge plate is detachably connected to the trimming mounting plate by bolts.

6. The composite mold integrating trimming, punching and shaping according to claim 1, characterized in that: Two support plates are vertically connected between the upper die mounting plate and the trimming mounting plate. The two support plates are arranged in parallel and at intervals. The upper punch mounting plate is located between the two support plates. The support plates are detachably connected to the upper die mounting plate and the trimming mounting plate by bolts.

7. The composite mold integrating trimming, punching and shaping according to claim 1, characterized in that: A lower punch mounting plate is detachably connected above the lower die mounting plate through bolts, and a trimming lower punch is detachably connected above the lower punch mounting plate through bolts.

8. A composite mold integrating trimming, punching and shaping according to claim 7, characterized in that: A guide sleeve is vertically arranged on the lower side of the trimming mounting plate, and a guide column matching the guide sleeve is vertically arranged on the upper side of the lower punch mounting plate. When the upper die and the lower die are used in combination, the upper end of the guide column is located in the guide sleeve and slides in cooperation.

9. The composite mold integrating trimming, punching and shaping according to claim 7, characterized in that: A stripping plate is arranged parallelly and spaced above the lower punch mounting plate, and a stripping hole matching the outer contour of the trimming lower punch is provided in the middle of the stripping plate. The trimming lower punch is located in the stripping hole and slides in cooperation with the hole, and a second compression spring is vertically abutted between the stripping plate and the lower punch mounting plate, and the second compression spring is connected to the stripping plate.

10. A composite mold integrating trimming, punching and shaping according to claim 9, characterized in that: The first compression spring is a spiral compression spring, and the second compression spring is a polyurethane spring.

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