A punching device and method for reinforcing structural parts of new energy vehicles

Abstract

The present invention relates to the technical field of vehicle body stamping, and discloses a device and method for stamping reinforced structural parts of new energy vehicles, wherein a device for stamping reinforced structural parts of new energy vehicles comprises an edge pressure unit, comprising a plurality of positioning holes arranged on a lower die of a cavity, the positioning holes being distributed along the edge spacing of a plate to be stamped, and also comprising a positioning shell arranged in the positioning hole, and a tensioning cable passing through a plurality of positioning shells, the tensioning cable being in contact with the edge of the plate to be stamped, a tensioning member being arranged in the positioning shell along a vertical direction of the tensioning cable for sliding, an extrusion groove being vertically arranged on the tensioning member, and an extrusion member being arranged on an upper die of the cavity. In the device for stamping reinforced structural parts of new energy vehicles, during the stamping process, the upper die of the cavity drives the extrusion member to slide into the extrusion groove, and pushes the tensioning member to extrude the tensioning cable in a vertical direction of the tensioning cable, and the tensioning cable is tensioned during the tensioning process to extrude the edge of the plate to be stamped to form compressive stress, and the degree of ultimate deformation is significantly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle body stamping, and in particular to a device and method for stamping reinforced structural parts of new energy vehicles. Background Art

[0002] The punching device for automobile reinforcement structural parts is a device and mold system specially used to manufacture automobile reinforcement structural parts. Reinforced structural parts are usually used to improve the overall strength, rigidity and safety of the automobile, such as the reinforcement inside the door, the body frame, the A-pillar, the B-pillar and other key parts. These structural parts play a supporting and protective role when the car collides or is subjected to force, so the punching device needs to have high precision and strong pressure capacity.

[0003] Compared with deep-drawing steel and other materials, lightweight materials such as aluminum alloy and magnesium alloy have small hardening index and plasticity index values, poor forming performance, and low plasticity index, which become bottlenecks in their forming processing. Many thin-walled deep-drawn parts are broken due to excessive tensile stress at the bottom of the drawn parts due to large drawing ratio and deformation of the flange part of the blank. Therefore, the side drawing technology that applies pressure to the edge of the sheet during the stamping process to increase the forming limit of the parts and reduce the number of forming passes is one of the effective ways to stamp parts of low-plasticity, difficult-to-form lightweight materials such as aluminum alloy and magnesium alloy. Summary of the invention

[0004] In view of the above problems in the prior art, a punching device and method for reinforced structural parts of new energy vehicles are proposed.

[0005] One aspect of the present application provides a punching device for reinforced structural parts of new energy vehicles, the purpose of which is to increase the forming limit of the parts by driving high-voltage ropes to apply radial pressure around the deformation zone of the blank when pressing down, so as to avoid rupture due to excessive tensile stress.

[0006] The technical solution of the present invention is: a punching device for reinforcing structural parts of new energy vehicles, comprising an upper die base and a lower die base, an upper die of a cavity arranged in the upper die base, and a lower die of a cavity arranged in the lower die base, and also comprising an edge pressure unit;

[0007] The edge pressure unit includes a plurality of positioning holes arranged on the lower die of the cavity, the positioning holes are distributed along the edge spacing of the sheet to be punched, and also includes a positioning shell arranged in the positioning holes, and a tensioning cable inserted in the plurality of positioning shells, the tensioning cable is attached to the edge of the sheet to be punched, a tensioning member is slidably arranged in the positioning shell along the vertical direction of the tensioning cable, an extrusion groove is vertically arranged on the tensioning member, and an extrusion member is arranged on the upper die of the cavity, and the number and position of the extrusion member correspond to the positioning shell one by one;

[0008] During the stamping process, the upper die of the cavity squeezes the lower die of the cavity, and the upper die of the cavity drives the extruded part to slide into the extrusion groove, pushing the tensioning part to squeeze the tensioning cable in the vertical direction of the tensioning cable. The tensioning process of the tensioning cable squeezes the edge of the sheet to be stamped to form compressive stress.

[0009] By adopting the above scheme, an edge pressure unit is set. During the stamping process, the upper die of the cavity squeezes the lower die of the cavity, and the upper die of the cavity drives the extrusion part to slide into the extrusion groove. As the sheet to be stamped is extruded, the extrusion part pushes the tensioning part to squeeze the tensioning cable in the vertical direction of the tensioning cable. During the tensioning process of the tensioning cable, the edge of the sheet to be stamped is squeezed to form a compressive stress. Until the stamping is completed, the pressure of the tensioning cable on the edge of the sheet to be stamped gradually becomes zero. The change law of the pressure applied to the edge of the sheet to be stamped is the same as the change law of the radial tensile stress in the deformation zone of the sheet to be stamped during the drawing process. Under the action of the compressive stress on the edge of the sheet to be stamped, the radial tensile stress generated in the deformation zone of the sheet to be stamped is suppressed, the radial tensile stress generated in the deformation zone of the sheet to be stamped is reduced, and the burden on the force transmission zone of the sheet to be stamped is reduced, so the ultimate deformation degree is significantly improved.

[0010] Furthermore, the positioning shell is composed of an upper shell and a lower shell connected to the upper shell. The upper shell and the lower shell have the same shape, both are rectangular hollow cylinders with arc edges. The size of the lower shell is smaller than that of the upper shell. The positioning hole is a stepped hole that fits the shape of the positioning shell. The upper shell is provided with a cable hole for the tensioning cable to pass through.

[0011] By adopting the above solution, the positioning shell is fixed by providing the stepped positioning hole and the positioning shell matching the stepped positioning hole.

[0012] Furthermore, a closing shell is arranged inside the positioning shell, and the closing shell is composed of a top cover and a side plate, the side plate is in contact with the inner cavity wall of the upper shell, and a second cable hole for the tensioning cable to pass through is opened on the side plate.

[0013] By adopting the above solution, the tensioning cable is restricted to slide in the positioning shell by providing a closed shell.

[0014] Furthermore, the tensioning member is composed of a tensioning block in the upper part and a sliding block in the lower part. The shape of the sliding block fits the inner cavity of the lower shell, but the length is shorter than the inner cavity of the lower shell. The sliding block slides in the lower shell. The tensioning block is a columnar body, and its bottom surface contour is formed by connecting a large arc and a small arc. The large arc is in contact with the inner cavity of the side plate, and the radius difference between the small arc and the large arc is greater than the diameter of the tensioning cable. The extrusion groove runs through the side wall of the tensioning member in the direction away from the tensioning cable.

[0015] By adopting the above scheme, a tensioning piece is set, and the tensioning block in the upper part squeezes the tensioning cable, causing the tensioning cable to be partially bent, thereby tensioning the tensioning cable. The sliding block in the lower part slides in the lower shell body, thereby providing a guide for the sliding of the tensioning block.

[0016] Furthermore, the hole wall of the second cable passing hole in the bending direction of the tensioning cable is arranged as an inclined surface.

[0017] By adopting the above solution and setting the inclined surface, the resistance when the tensioning block squeezes the tensioning cable to bend is lower.

[0018] Furthermore, a clamping groove is provided on one side of the tensioning cable close to the sheet to be punched, and the sheet to be punched is embedded in the clamping groove.

[0019] By adopting the above scheme, the plate to be punched is embedded in the engaging groove by providing the engaging groove, so that the pressure of the tensioning cable on the edge of the plate to be punched is more uniform, and the tensioning cable and the edge of the plate to be punched are prevented from slipping off.

[0020] Furthermore, the extrusion piece is composed of a connecting plate and an extrusion plate, the connecting plate is fixed to the upper die of the cavity by bolts, and the side of the extrusion plate that is in contact with the extrusion groove is set as an arc surface.

[0021] By adopting the above scheme, by setting the arc surface, the pressure of the tensioning cable on the edge of the sheet to be stamped during the stamping process first increases and then gradually becomes zero, so that the change law of the pressure applied to the edge of the sheet to be stamped is the same as the change law of the radial tensile stress in the deformation zone of the sheet to be stamped during the drawing process.

[0022] Furthermore, abutment claws are provided on both sides of the positioning shell.

[0023] By adopting the above solution and providing the abutting claws, when the closing shell is engaged in the positioning shell, the side plates press the abutting claws to expand outwards, and the abutting claws exert a squeezing force on the hole wall of the positioning hole, thereby fixing the positioning shell.

[0024] Furthermore, another aspect of the present invention provides a method for stamping a reinforced structural part of a new energy vehicle, comprising the following steps:

[0025] Step 1: Cut the larger sheet to be stamped into the required shape and size by stamping;

[0026] Step 2: Place the cut sheet to be stamped on the lower die of the cavity, and position it through the positioning shell, fit the edge of the sheet to be stamped into the clamping groove, and start the upper die seat to press down to stretch the sheet to be stamped into the three-dimensional shape of the car door. In this process, the sheet to be stamped is pulled into a deeper shape to form the outline of the door;

[0027] Step 3: Remove the excess material through the trimming mold to make the door meet the shape and size required by the design;

[0028] Step 4: The punching process will punch holes at appropriate locations on the door;

[0029] Step 5: Fold the metal edge of the door to form a reinforced edge or flange for assembly;

[0030] Step 6: Adjust and optimize the surface and contour of the door to ensure that the final shape of the door is accurate and meets the designed shape tolerance requirements.

[0031] Beneficial effects of the present invention:

[0032] By setting an edge pressure unit, during the stamping process, the upper die of the cavity squeezes the lower die of the cavity, and the upper die of the cavity drives the extrusion part to slide into the extrusion groove. As the sheet to be stamped is extruded, the extrusion part pushes the tensioning part to squeeze the tensioning cable in the vertical direction of the tensioning cable. The tensioning process of the tensioning cable squeezes the edge of the sheet to be stamped to form compressive stress. Until the stamping is completed, the pressure of the tensioning cable on the edge of the sheet to be stamped gradually becomes zero. The change law of the pressure applied to the edge of the sheet to be stamped is the same as the change law of the radial tensile stress in the deformation zone of the sheet to be stamped during the drawing process. Under the action of the compressive stress on the edge of the sheet to be stamped, the radial tensile stress generated in the deformation zone of the sheet to be stamped is suppressed, the radial tensile stress generated in the deformation zone of the sheet to be stamped is reduced, and the burden on the force transmission zone of the sheet to be stamped is reduced, so the limit deformation degree is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A three-dimensional diagram of a punching device for reinforcing structural parts of new energy vehicles according to the present invention;

[0034] Figure 2 It is a stereoscopic diagram of the upper die and the lower die of the cavity in the punching device for the reinforced structural part of the new energy vehicle of the present invention;

[0035] Figure 3 This is an exploded view of the edge pressure unit in the punching device for reinforcing structural parts of new energy vehicles of the present invention;

[0036] Figure 4 This is a diagram showing the installation position of the edge pressure unit in the punching device for the reinforced structural part of a new energy vehicle according to the present invention;

[0037] Figure 5 A three-dimensional diagram of an edge pressure unit in a punching device for reinforcing structural parts of a new energy vehicle according to the present invention;

[0038] Figure 6 For the present invention Figure 5 Horizontal interface cross-sectional view;

[0039] Figure 7 For the present invention Figure 5 A longitudinal cross-sectional view of a

[0040] Figure 8 For the present invention Figure 5 Exploded diagram of

[0041] Fig. 9 This is a schematic diagram of the tensioning cable being squeezed by the tensioning member in the punching device for the reinforced structural member of a new energy vehicle of the present invention;

[0042] Fig.10 It is a cross-sectional view of the tensioning cable in the punching device for the reinforced structural part of a new energy vehicle according to the present invention.

[0043] In the figure:

[0044] 1. Upper die seat; 2. Lower die seat; 3. Upper die of cavity; 4. Lower die of cavity; 5. Positioning hole; 6. Positioning shell; 7. Tensioning cable; 8. Tensioning member; 9. Extrusion groove; 10. Extrusion member; 11. Upper shell; 12. Lower shell; 13. Cable hole 1; 14. Closing shell; 15. Top cover; 16. Side plate; 17. Cable hole 2; 18. Tensioning block; 19. Sliding block; 20. Large arc; 21. Small arc; 22. Inclined surface; 23. Engaging groove; 24. Connecting plate; 25. Extrusion plate; 26. Arc surface; 27. Abutting claw. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0046] Example 1, reference Figure 1-Figure 10 , which is the first embodiment of the present invention, provides a punching device for reinforcing structural parts of new energy vehicles, including an upper die base 1 and a lower die base 2, a cavity upper die 3 arranged in the upper die base 1 and a cavity lower die 4 arranged in the lower die base 2, and also includes an edge pressure unit; the edge pressure unit includes a plurality of positioning holes 5 arranged on the cavity lower die 4, the positioning holes 5 are distributed along the edge spacing of the plate to be punched, and also includes a positioning shell 6 arranged in the positioning hole 5, and a tensioning cable 7 inserted in the plurality of positioning shells 6, and the tensioning cable 7 is connected to the plate to be punched. The edges of the plates are attached to each other, and a tensioning member 8 is provided in the positioning shell 6 to slide along the vertical direction of the tensioning cable 7. An extrusion groove 9 is vertically provided on the tensioning member 8. An extrusion member 10 is provided on the upper die 3 of the cavity. The number and position of the extrusion members 10 correspond to the positioning shell 6 one by one. During the stamping process, the upper die 3 of the cavity extrude the lower die 4 of the cavity, and the upper die 3 of the cavity drives the extrusion member 10 to slide into the extrusion groove 9, pushing the tensioning member 8 to extrude the tensioning cable 7 along the vertical direction of the tensioning cable 7. During the tensioning process of the tensioning cable 7, the edge of the plate to be stamped is squeezed to form compressive stress.

[0047] Specifically, the extrusion part 10 is fixed on the upper die 3 of the cavity and is pressed down together with the upper die 3 of the cavity. Two positioning shells 6 are provided on each edge of the sheet to be stamped to achieve uniform tightening of the tensioning cable 7. A plurality of notches are pre-processed on the sheet to be stamped, and the notches are engaged with the positioning shells 6 to achieve the positioning effect on the sheet to be stamped.

[0048] By setting the edge pressure unit, during the stamping process, the upper die 3 of the cavity squeezes the lower die 4 of the cavity, and the upper die 3 of the cavity drives the extrusion part 10 to slide into the extrusion groove 9. As the sheet to be stamped is extruded, the extrusion part 10 pushes the tensioning part 8 to squeeze the tensioning cable 7 in the vertical direction of the tensioning cable 7. The tensioning process of the tensioning cable 7 squeezes the edge of the sheet to be stamped to form compressive stress. Until the stamping is completed, the pressure of the tensioning cable 7 on the edge of the sheet to be stamped gradually becomes zero. The change law of the pressure applied to the edge of the sheet to be stamped is the same as the change law of the radial tensile stress in the deformation zone of the sheet to be stamped during the drawing process. Under the action of the compressive stress on the edge of the sheet to be stamped, the radial tensile stress generated in the deformation zone of the sheet to be stamped is suppressed, the radial tensile stress generated in the deformation zone of the sheet to be stamped is reduced, and the burden on the force transmission zone of the sheet to be stamped is reduced, so the limit deformation degree is significantly improved.

[0049] Reference Figure 8 The positioning shell 6 is composed of an upper shell 11 and a lower shell 12 connected to the upper shell 11. The upper shell 11 and the lower shell 12 have the same shape, both of which are rectangular cavity cylinders with arc edges. The size of the lower shell 12 is smaller than that of the lower shell 12. The positioning hole 5 is a stepped hole. The positioning hole 5 fits the shape of the positioning shell 6. The upper shell 11 is provided with a cable hole 13 for the tensioning cable 7 to pass through.

[0050] The stepped positioning hole 5 and the matching positioning shell 6 are provided to fix the positioning shell 6 .

[0051] Reference Figure 8 A closed shell 14 is arranged in the positioning shell 6, and the closed shell 14 is composed of a top cover 15 and a side plate 16. The side plate 16 is attached to the inner cavity wall of the upper shell 11, and a cable hole 17 for the tensioning cable 7 to pass through is opened on the side plate 16.

[0052] By providing the closing shell 14 , the tensioning cable 7 is restricted from sliding in the positioning shell 6 .

[0053] Reference Figure 8The tensioning member 8 is composed of a tensioning block 18 in the upper part and a sliding block 19 in the lower part. The shape of the sliding block 19 fits the inner cavity of the lower shell 12, but the length is shorter than the inner cavity of the lower shell 12. The sliding block 19 slides in the lower shell 12. The tensioning block 18 is a columnar body, and its bottom surface contour is connected by a large arc 20 and a small arc 21. The large arc 20 is in contact with the inner cavity of the side plate 16, and the radius difference between the small arc 21 and the large arc 20 is greater than the diameter of the tensioning cable 7. The extrusion groove 9 runs through the side wall of the tensioning member 8 away from the tensioning cable 7.

[0054] Specifically, the arc-shaped cavity between the small arc 21 and the inner wall of the side plate 16 is a deformation area for accommodating the tensioning block 18 to extrude the tensioning cable 7. Before the upper mold 3 of the cavity and the lower mold 4 of the cavity are closed, the tensioning cable 7 is tangent to the small arc 21. As the upper mold 3 of the cavity and the lower mold 4 of the cavity are closed, the tensioning block 18 extrude the tensioning cable 7 so that the tensioning cable 7 is close to the inner wall of the side plate 16. After the stamping is completed, as the upper mold 3 of the cavity and the lower mold 4 of the cavity are separated, the tensioning block 18 is reset under the tension of the tensioning cable 7.

[0055] By setting the tensioning member 8, the tensioning block 18 in the upper part squeezes the tensioning cable 7, causing the tensioning cable 7 to be partially bent, thereby tensioning the tensioning cable 7, and the sliding block 19 in the lower part slides in the lower shell 12 to provide a guide for the sliding of the tensioning block 18.

[0056] Reference Figure 6 The hole wall of the second cable hole 17 in the bending direction of the tensioning cable 7 is set as an inclined surface 22.

[0057] By providing the inclined surface 22, the resistance when the tensioning block 18 presses the tensioning cable 7 to bend is lower.

[0058] Reference Fig.10 A clamping groove 23 is provided on the side of the tensioning cable 7 close to the plate to be punched, and the plate to be punched is embedded in the clamping groove 23.

[0059] The engaging groove 23 is provided so that the sheet to be punched is embedded in the engaging groove 23 , so that the pressure of the tensioning cable 7 on the edge of the sheet to be punched is more uniform, and the tensioning cable 7 is prevented from slipping off the edge of the sheet to be punched.

[0060] Reference Figure 8 The extrusion piece 10 is composed of a connecting plate 24 and an extrusion plate 25. The connecting plate 24 is fixed to the upper die 3 of the cavity by bolts, and the side of the extrusion plate 25 that is in contact with the extrusion groove 9 is set as an arc surface 26.

[0061] By setting the arc surface 26, the pressure of the tension cable 7 on the edge of the sheet to be stamped during the stamping process first increases and then gradually becomes zero, so that the change law of the pressure applied to the edge of the sheet to be stamped is the same as the change law of the radial tensile stress in the deformation zone of the sheet to be stamped during the drawing process.

[0062] Reference Figure 5 Abutment claws 27 are provided on both sides of the positioning shell 6 .

[0063] By providing the abutting claws 27 , when the closing shell 14 is engaged in the positioning shell 6 , the side plate 16 presses the abutting claws 27 to expand outwards, and the abutting claws 27 generate a squeezing force on the hole wall of the positioning hole 5 , thereby fixing the positioning shell 6 .

[0064] Example 2, reference Figure 1-10 , which is a second embodiment of the present invention, provides: a method for stamping a reinforced structural part of a new energy vehicle, using a stamping device for stamping a reinforced structural part of a new energy vehicle, comprising the following steps:

[0065] Step 1: Cut the larger sheet to be stamped into the required shape and size by stamping;

[0066] Step 2: Place the cut sheet to be stamped on the cavity lower die 4 and position it through the positioning shell 6, fit the edge of the sheet to be stamped into the engaging groove 23, start the upper die seat 1 to press down and stretch the sheet to be stamped into a roughly three-dimensional shape of the car door. In this process, the sheet to be stamped is pulled into a deeper shape to form the basic outline of the door;

[0067] Step 3: Remove the excess material through the trimming mold to make the door meet the shape and size required by the design;

[0068] Step 4: The punching process will punch holes at appropriate locations on the door;

[0069] Step 5: Fold the metal edge of the door to form a reinforced edge or flange for assembly;

[0070] Step 6: Adjust and optimize the surface and contour of the door to ensure that the final shape of the door is accurate and meets the designed shape tolerance requirements.

Claims

1. A punching device for reinforcing structural parts of new energy vehicles, comprising an upper die base (1) and a lower die base (2), an upper die (3) for a cavity arranged in the upper die base (1), and a lower die (4) for a cavity arranged in the lower die base (2), characterized in that: Also included is an edge pressure unit; The edge pressure unit comprises a plurality of positioning holes (5) arranged on the lower die (4) of the cavity, wherein the positioning holes (5) are distributed at intervals along the edge of the sheet to be punched, and further comprises a positioning shell (6) arranged in the positioning hole (5), and a tensioning cable (7) passing through the plurality of positioning shells (6), wherein the tensioning cable (7) is in contact with the edge of the sheet to be punched, and a tensioning member (8) is slidably arranged in the positioning shell (6) along the vertical direction of the tensioning cable (7), and an extrusion groove (9) is vertically arranged on the tensioning member (8), and an extrusion member (10) is arranged on the upper die (3) of the cavity, and the number and position of the extrusion member (10) correspond one-to-one to the positioning shell (6); During the stamping process, the upper die (3) of the cavity squeezes the lower die (4) of the cavity, and the upper die (3) of the cavity drives the extrusion member (10) to slide into the extrusion groove (9), pushing the tension member (8) to squeeze the tension cable (7) in a direction perpendicular to the tension cable (7). During the tensioning process of the tension cable (7), the side edge of the sheet to be stamped is squeezed perpendicularly to the thickness direction of the sheet to be stamped to form lateral compressive stress.

2. The punching device for reinforcing structural parts of new energy vehicles according to claim 1 is characterized in that: The positioning shell (6) is composed of an upper shell (11) and a lower shell (12) connected to the upper shell (11). The upper shell (11) and the lower shell (12) have the same shape and are both rectangular hollow cylinders with arc edges. The size of the lower shell (12) is smaller than that of the lower shell (12). The positioning hole (5) is a stepped hole. The positioning hole (5) fits the shape of the positioning shell (6). The upper shell (11) is provided with a cable hole (13) for the tensioning cable (7) to pass through.

3. The punching device for reinforcing structural parts of new energy vehicles according to claim 2 is characterized in that: A closed shell (14) is arranged inside the positioning shell (6), and the closed shell (14) is composed of a top cover (15) and a side plate (16). The side plate (16) is in contact with the inner cavity wall of the upper shell (11), and a second cable hole (17) for the tensioning cable (7) to pass through is opened on the side plate (16).

4. The punching device for reinforcing structural parts of new energy vehicles according to claim 3 is characterized in that: The tensioning member (8) is composed of a tensioning block (18) in the upper part and a sliding block (19) in the lower part. The shape of the sliding block (19) fits the inner cavity of the lower shell (12), but the length is shorter than the inner cavity of the lower shell (12). The sliding block (19) slides in the lower shell (12). The tensioning block (18) is a columnar body, and its bottom surface contour is formed by connecting a large arc (20) and a small arc (21). The large arc (20) is in contact with the inner cavity of the side wall, and the radius difference between the small arc (21) and the large arc (20) is greater than the diameter of the tensioning cable (7). The extrusion groove (9) runs through the side wall of the tensioning member (8) in the direction away from the tensioning cable (7).

5. The punching device for reinforcing structural parts of new energy vehicles according to claim 4 is characterized in that: The hole wall of the second cable hole (17) in the bending direction of the tensioning cable (7) is arranged as an inclined surface (22).

6. The punching device for reinforcing structural parts of new energy vehicles according to claim 1, characterized in that: The tensioning cable (7) is provided with a clamping groove (23) on one side close to the plate to be punched, and the plate to be punched is embedded in the clamping groove (23).

7. The punching device for reinforcing structural parts of new energy vehicles according to claim 1, characterized in that: The extrusion piece (10) is composed of a connecting plate (24) and an extrusion plate (25). The connecting plate (24) is fixed to the upper die (3) of the cavity by bolts. The side of the extrusion plate (25) that is in contact with the extrusion groove (9) is set as a curved surface (26).

8. The punching device for reinforcing structural parts of new energy vehicles according to claim 1, characterized in that: Abutment claws (27) are provided on both sides of the positioning shell (6).

9. A method for punching reinforced structural parts of new energy vehicles, using the punching device for reinforced structural parts of new energy vehicles as claimed in claim 6, characterized in that: The following steps are involved: Step 1: Cut the larger sheet to be stamped into the required shape and size by stamping; Step 2: placing the cut sheet to be stamped on the cavity lower die (4), and positioning it through the positioning shell (6), fitting the edge of the sheet to be stamped into the engaging groove (23), and starting the upper die seat (1) to press down to stretch the sheet to be stamped into the three-dimensional shape of the car door. In this process, the sheet to be stamped is pulled into a deeper shape to form the outline of the car door; Step 3: Remove the excess material through the trimming mold to make the door meet the shape and size required by the design; Step 4: The punching process will punch holes at appropriate locations on the door; Step 5: Fold the metal edge of the door to form a reinforced edge or flange for assembly; Step 6: Adjust and optimize the surface and contour of the door to ensure that the final shape of the door is accurate and meets the designed shape tolerance requirements.

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