Stamping die for automobile parts

Abstract

The invention belongs to the technical field of automobile manufacturing, and particularly discloses an automobile part stamping die which comprises an air cylinder and a buffering assembly, an upper die base is fixed below the air cylinder, a lower die base is fixed above the buffering assembly, and the upper die base corresponds to the lower die base in position and is matched with the lower die base; a bracket is arranged between the cylinder and the buffer component; one end of the bracket is fixed on two sides of the cylinder; the other end of the bracket is fixed on two sides of the buffer component; the buffer assembly comprises a base, a first spring and a buffer plate, the two sides of the base are fixed to the support, and the two ends of the first spring are fixed to the base and the buffer plate respectively; a first mounting groove is formed in the upper portion of the buffer plate, a third spring is fixed to the bottom of the first mounting groove, a convex block is fixed to the other end of the third spring, and a connecting rod mechanism is hinged between the convex block and the first mounting groove; the lower die base comprises a workbench, and the workbench is connected with a buffer plate through a first limiting rod. The device solves the problems that in the current stamping process, impact force is high, and demolding is difficult.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile manufacturing, and particularly relates to a stamping die for automobile parts. Background Art

[0002] In the field of automobile manufacturing, the production quality of automobile parts is directly related to the overall performance and safety of the automobile. As a key link in the manufacturing of automobile parts, the stamping process is widely used in the forming processing of various metal parts, such as body panels, chassis structural parts, etc. The stamping die is the core equipment of the stamping process, and its performance directly affects the quality of stamped parts, production efficiency, and the service life of the die.

[0003] Traditional stamping dies for automobile parts face many challenges in the actual production process. On the one hand, during the stamping process, a huge impact force will be generated between the die and the workpiece. This impact force will not only cause the die to deform and wear, reducing the accuracy and service life of the die, but may also cause equipment vibration, affecting the stability of the production environment, and even posing a safety hazard to operators. On the other hand, after stamping is completed, the workpiece is easily difficult to demold due to being closely attached to the die, and additional demolding devices or manual assistance are required for demolding. This not only increases the complexity of the production process, reduces production efficiency, but may also cause surface damage to the workpiece due to improper demolding, affecting product quality.

[0004] To solve the above problems, some buffering and demolding measures have been adopted in existing stamping dies. For example, elastic elements such as springs are set in the die to buffer the impact force, but the buffering effect of these springs is limited and it is difficult to cope with high-intensity and high-frequency stamping operations; in terms of demolding, some dies achieve demolding by adding an ejector mechanism, but the structure of the ejector mechanism is complex, increasing the manufacturing cost and maintenance difficulty of the die, and still may cause damage to the workpiece during the demolding process.

[0005] To solve the above problems, a stamping die for automobile parts is now proposed to solve the problems of strong impact force and difficult demolding during the current stamping process. Summary of the Invention

[0006] The purpose of the present invention is to propose a stamping die for automobile parts to solve the problems raised in the above background art.

[0007] To solve the above technical problems, the present invention provides the following technical solution: A stamping die for automobile parts, including a cylinder and a buffer assembly. The upper die base is fixed below the cylinder, and the lower die base is fixed above the buffer assembly. The upper die base and the lower die base are in corresponding positions and are adapted to each other; A bracket is provided between the cylinder and the buffer assembly. One end of the bracket is fixed on both sides of the cylinder, and the other end is fixed on both sides of the buffer assembly; The buffer assembly includes a base, a first spring, and a buffer plate. Both sides of the base are fixed to the brackets, and the two ends of the first spring are respectively fixed to the base and the buffer plate; An installation groove one is formed above the buffer plate. A third spring is fixed to the bottom of the installation groove one, and the other end of the third spring is fixed to a convex block. A link mechanism is hinged between the convex block and the installation groove one; The lower die base includes a workbench, and the workbench is connected to the buffer plate through a first limiting rod. The first limiting rod penetrates through the buffer plate and is fixed to the lower die base; The upper die base includes a support seat and a stamping block slidably connected below it. A telescopic mechanism is provided between the support seat and the buffer plate. The telescopic mechanism includes a fixed cylinder, a sliding cylinder, and a fixed rod. The fixed cylinder is fixed to the buffer plate and is in clearance fit with the convex block, and the fixed rod is fixed to the support seat.

[0008] Further description of the present invention: A sliding groove one is formed below the support seat, and the sliding groove one corresponds longitudinally to the convex block. A third limiting groove is formed above the stamping block, and a second limiting groove is formed below the support seat. A second limiting block is slidably connected in the second limiting groove. A buffer spring is fixed below the second limiting block, and the other end of the buffer spring is fixed to a third limiting block. The third limiting block is slidably connected in the third limiting groove.

[0009] Further description of the present invention: The workbench is fixed to the first limiting rod. A groove is formed above the workbench for placing a mold, and a first through hole is formed in the workbench; A second support rod is slidably connected in the first through hole. A first limiting block is fixed below the second support rod, and a second limiting rod is fixed below the first limiting block. The other end of the second limiting rod penetrates through the buffer plate. A second spring is sleeved on the outer diameter of the second limiting rod. One end of the second spring is fixed below the first limiting block, and the other end is fixed to the buffer plate.

[0010] Further description of the present invention: The link mechanism includes a first link and a second link. A third limiting rod is hinged between the first link and the second link. The third limiting rod penetrates through the buffer plate and contacts the outer diameter of the second limiting rod. A first limiting groove is formed on the outer diameter of the second limiting rod, and the first limiting groove is located above the third limiting rod.

[0011] Further description of the present invention: A fifth limiting groove is formed in the base. A first limiting rod is slidably connected in the fifth limiting groove. One end of the first limiting rod is located in the fifth limiting groove, and a bevel is formed on the side of the first limiting rod facing the bracket.

[0012] The present invention is further described as follows. One end of the sliding cylinder is slidably connected inside the fixed cylinder, and the other end sleeves the fixed rod and has a clearance fit with the first sliding groove. One end of the fixed rod is fixed inside the first sliding groove, and the other end is slidably connected to the sliding cylinder.

[0013] The present invention is further described as follows. A second sliding groove is provided on the inner wall of the sliding cylinder. A fourth limiting rod is arranged in the second sliding groove. The fourth limiting rod penetrates the inner wall of the sliding cylinder and fits with the fixed cylinder. A trapezoidal block is fixed at the end of the fourth limiting rod away from the fixed cylinder. The inclined surface of the trapezoidal block faces the fixed rod and is located below it. There is a fourth spring between the second sliding groove and the trapezoidal block. A fourth limiting groove is provided on the inner wall of the fixed cylinder, and the fourth limiting groove is located on the sliding path of the fourth limiting rod.

[0014] The present invention is further described as follows. Two first support rods are fixed above the support base. The two first support rods are respectively arranged on both sides of the cylinder. The first support rods penetrate the bracket and are slidably connected to it. An inclined groove is provided on the outer diameter of the first support rod, and the inclined groove is located inside the bracket.

[0015] The present invention is further described as follows. A transmission mechanism is arranged inside the bracket. The transmission mechanism is located on both sides of the device. The transmission mechanism includes a gear and two transmission strips. The gear is located at the center of the bracket. One end of each transmission strip is trapezoidal, and the other end is rack-shaped. The rack ends of the two transmission strips are meshed on both sides of the gear, and the trapezoidal ends of the two transmission strips respectively face the upper and lower ends of the bracket.

[0016] The present invention is further described as follows. A fourth limiting block is slidably connected between the trapezoidal end of one transmission strip and the inclined groove of the first support rod. A fifth limiting block is slidably connected between the trapezoidal end of the other transmission strip and the inclined angle of the first limiting rod.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the present invention, a multi-stage buffering structure is provided. The first spring, the second spring, and the third spring in the buffering assembly can gradually absorb and disperse the huge impact force exerted by the upper die base on the lower die base during the stamping process. When the upper die base contacts the lower die base, the workbench moves towards the buffer plate under pressure, and the second spring plays a role to make the die move upward relative to the workbench, initially buffering part of the impact force. As the upper die base continues to move, the third spring and the first spring further participate in buffering, greatly reducing the risk of deformation and wear of the die and the equipment caused by the impact, extending the service life of the die and the equipment, and reducing the equipment maintenance and replacement costs of the enterprise.

[0018] During the movement of the upper die base, the fixed rod in the telescopic mechanism interacts with the trapezoidal block, driving the sliding cylinder to slide. As a result, the convex block moves and drives the third limiting rod to move through the linkage mechanism. When the workbench contacts the buffer plate, the top of the third limiting rod is exactly located inside the first limiting groove. At this time, the fourth limiting rod enters the fourth limiting groove. The fixed rod continues to move downward, and the upper die base, the lower die base, and the buffer plate form an integral body and move towards the buffer assembly. This series of processes achieves precise buffering of the impact force and avoids the instantaneous damage to the mold and equipment caused by the impact force.

[0019] The demoulding design of the present invention is ingenious and efficient. After stamping is completed, the air cylinder drives the upper die base to move upward, and the fixed rod moves upward accordingly. After the fixed rod stops contacting the trapezoidal block, the trapezoidal block drives the fourth limiting rod to leave the fourth limiting groove under the action of the fourth spring. The fixed rod drives the sliding cylinder to slide upward, and the convex block moves upward under the action of the third spring, driving the third limiting rod to leave the first limiting groove. The second limiting rod drives the mold to move upward under the action of the second spring. Description of the Drawings

[0020] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings: Figure 1 is the overall structural schematic diagram of the embodiment of the present invention; Figure 2 is the overall structural sectional view of the embodiment of the present invention; Figure 3 is the embodiment of the present invention Figure 2 Enlarged schematic view of area A; Figure 4 is the embodiment of the present invention Figure 2 Enlarged schematic view of area B; Figure 5 is the embodiment of the present invention Figure 4 Enlarged schematic view of area C; In the figure: 1. Air cylinder; 101. First support rod; 1011. Inclined groove; 102. Fourth limiting block; 103. Fifth limiting block; 2. Upper die base; 201. Support seat; 2011. First sliding groove; 202. Second limiting groove; 203. Second limiting block; 204. Buffer spring; 205. Third limiting block; 206. Stamping block; 207. Third limiting groove; 3. Lower die base; 301. Workbench; 302. Groove; 303. Mold; 304. Second support rod; 305. First limiting block; 306. Second limiting rod; 307. First limiting groove; 308. Second spring; 4. Buffer assembly; 401. Base; 4011. Fifth limiting groove; 4012. First limiting rod; 402. First spring; 403. Buffer plate; 404. First installation groove; 405. Third spring; 406. Convex block 5. Bracket 6. Linkage mechanism; 601. First link; 602. Second link; 603. Third limiting rod 7. Telescopic mechanism; 701. Fixed cylinder; 7011. Fourth limiting groove; 702. Sliding cylinder; 7021. Fourth limiting rod; 7022. Trapezoidal block; 7023. Second sliding groove; 7024. Fourth spring; 703. Fixed rod 8. Transmission mechanism; 801. Gear; 802. Transmission strip Detailed implementation manners

[0021] The technical solution of the present invention will be further described in detail below in conjunction with the preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0022] Please refer to Figures 1-5 , the embodiments of the present invention provide a technical solution: a stamping die for automotive parts, including a cylinder 1 and a buffer assembly 4. A top die base 2 is fixed below the cylinder 1, and a bottom die base 3 is fixed above the buffer assembly 4. The top die base 2 and the bottom die base 3 are in corresponding positions and are adapted to each other. A bracket 5 is installed between the cylinder 1 and the buffer assembly 4, and the bracket 5 is used for the cylinder 1 and the top die base 2

[0023] One end of the bracket 5 is fixed on both sides of the cylinder 1, and the other end is fixed on both sides of the buffer assembly 4

[0024] The buffer assembly 4 includes a base 401. Both sides of the base 401 are fixed to the bracket 5. A first spring 402 is fixed above the base 401, and the other end of the first spring 402 is fixed to a buffer plate 403 A fifth limiting groove 4011 is opened in the base 401. A first limiting rod 4012 is slidably connected in the fifth limiting groove 4011. One end of the first limiting rod 4012 is located in the fifth limiting groove 4011. An inclined angle is formed on the side of the first limiting rod 4012 facing the bracket 5, and the other end penetrates through the buffer plate 403 and is fixed to the lower part of the bottom die base 3 The lower die base 3 includes a workbench 301, the workbench 301 is fixed to the first limiting rod 4012, a groove 302 is formed above the workbench 301, a die 303 is placed in the groove 302, and a first through hole is formed in the workbench 301; a second support rod 304 is slidably connected in the first through hole, a first limiting block 305 is fixed below the second support rod 304, a second limiting rod 306 is fixed below the first limiting block 305, the other end of the second limiting rod 306 penetrates through the buffer plate 403, a second spring 308 is sleeved on the outer diameter of the second limiting rod 306, one end of the second spring 308 is fixed below the first limiting block 305, and the other end is fixed to the buffer plate 403; An installation groove 404 is formed above the buffer plate 403, a third spring 405 is fixed to the bottom of the installation groove 404, a convex block 406 is fixed to the other end of the third spring 405, a linkage mechanism 6 is hinged between the convex block 406 and the installation groove 404, the linkage mechanism 6 includes a first connecting rod 601 and a second connecting rod 602, a third limiting rod 603 is hinged between the first connecting rod 601 and the second connecting rod 602, the third limiting rod 603 penetrates through the buffer plate 403 and contacts the outer diameter of the second limiting rod 306, and a first limiting groove 307 is formed on the outer diameter of the second limiting rod 306 above the third limiting rod 603 for restricting the movement of the third limiting rod 603.

[0025] The upper die base 2 includes a support base 201 and a stamping block 206, the stamping block 206 is slidably connected below the support base 201, a first sliding groove 2011 is formed below the support base 201, the first sliding groove 2011 corresponds longitudinally to the convex block 406, a third limiting groove 207 is formed above the stamping block 206, a second limiting groove 202 is formed below the support base 201, a second limiting block 203 is slidably connected in the second limiting groove 202, a buffer spring 204 is fixed below the second limiting block 203, a third limiting block 205 is fixed to the other end of the buffer spring 204, and the third limiting block 205 is slidably connected in the third limiting groove 207.

[0026] An expansion mechanism 7 is arranged between the support base 201 and the buffer plate 403, the expansion mechanism 7 includes a fixed cylinder 701, a sliding cylinder 702 and a fixed rod 703, the fixed cylinder 701 is fixed above the buffer plate 403 and is in clearance fit with the convex block 406, one end of the sliding cylinder 702 is slidably connected in the fixed cylinder 701, the other end sleeves the fixed rod 703 and is in clearance fit with the first sliding groove 2011, one end of the fixed rod 703 is fixed in the first sliding groove 2011, and the other end is slidably connected with the sliding cylinder 702; The inner wall of the sliding cylinder 702 is provided with a second sliding groove 7023. A fourth limiting rod 7021 is arranged in the second sliding groove 7023. The fourth limiting rod 7021 penetrates through the inner wall of the sliding cylinder 702 and is in contact with the fixed cylinder 701. A trapezoidal block 7022 is fixed to one end of the fourth limiting rod 7021 away from the fixed cylinder 701. The inclined surface of the trapezoidal block 7022 faces the fixed rod 703 and is located below it. A fourth spring 7024 is arranged between the second sliding groove 7023 and the trapezoidal block 7022. The fourth spring 7024 is used to reset the trapezoidal block 7022; The inner wall of the fixed cylinder 701 is provided with a fourth limiting groove 7011. The fourth limiting groove 7011 is located on the sliding path of the fourth limiting rod 7021 and is used to limit the movement of the fourth limiting rod 7021.

[0027] Above the support seat 201, two first support rods 101 are fixed. The two first support rods 101 are respectively arranged on both sides of the air cylinder 1. The first support rods 101 penetrate through the bracket 5 and are slidably connected to it. An inclined groove 1011 is formed on the outer diameter of the first support rod 101. The inclined groove 1011 is located inside the bracket 5; A transmission mechanism 8 is arranged inside the bracket 5. The transmission mechanism 8 is located on both sides of the device. The transmission mechanism 8 includes a gear 801 and two transmission strips 802. The gear 801 is located at the center of the bracket 5. One end of the transmission strip 802 is trapezoidal and the other end is rack-shaped. The rack ends of the two transmission strips 802 are engaged on both sides of the gear 801. The trapezoidal ends of the two transmission strips 802 respectively face the upper and lower ends of the bracket 5; A fourth limiting block 102 is slidably connected between the trapezoidal end of one transmission strip 802 and the inclined groove 1011 of the first support rod 101. A fifth limiting block 103 is slidably connected between the trapezoidal end of the other transmission strip 802 and the bevel angle of the first limiting rod 4012; Working principle: When stamping automotive parts, the raw materials of the automotive parts are placed into the mold 303. By starting the air cylinder 1, the upper die holder 2 is moved towards the lower die holder 3.

[0028] When the support seat 201 contacts the workbench 301, the upper die holder 2 continues to move. The workbench 301 moves towards the buffer plate 403 under the pressure of the support seat 201. The mold 303 moves upward relative to the workbench 301 under the action of the elastic force of the second spring 308.

[0029] After the stamping block 206 first contacts the raw material of the auto parts, the upper die holder 2 continues to move. The stamping block 206 is subjected to the force of the raw material of the auto parts and presses the buffer spring 204. When the stamping block 206 contacts the support seat 201, the stamping block 206 and the support seat 201 become a whole and continue to move until the workbench 301 contacts the buffer plate 403 and the die 303 contacts the workbench 301 again.

[0030] During the movement of the upper die holder 2, the support seat 201 drives the fixed rod 703 to move downward. When the fixed rod 703 contacts the trapezoidal block 7022, the fixed rod 703 exerts a downward pressure on the trapezoidal block 7022, and the fixed rod 703 drives the sliding cylinder 702 to slide downward. When the sliding cylinder 702 contacts the convex block 406, the sliding cylinder 702 exerts a pressure on the convex block 406. The convex block 406 moves downward and drives the limiting rod three 603 to move in the direction of the limiting rod two 306 through the connecting rod one 601 and the connecting rod two 602. When the workbench 301 contacts the buffer plate 403, the top end of the limiting rod three 603 is exactly located inside the first limiting groove 307. At this time, the position of the limiting rod four 7021 exactly corresponds to the position of the fourth limiting groove 7011. By applying a force towards both ends to the trapezoidal block 7022 through the fixed rod 703, the trapezoidal block 7022 drives the limiting rod four 7021 to enter the fourth limiting groove 7011. After the limiting rod four 7021 enters the fourth limiting groove 7011, the trapezoidal block 7022 cannot hinder the fixed rod 703. By continuing to move the upper die holder 2, the fixed rod 703 continues to move downward, and the upper die holder 2, the lower die holder 3, and the buffer plate 403 form a whole and move towards the buffer assembly 4 until the required position is reached.

[0031] During the movement of the upper die holder 2, the lower die holder 3, and the buffer plate 403 towards the buffer assembly 4, the first limiting rod 4012 drives the fourth limiting block 102 to move towards the transmission bar 802. The fourth limiting block 102 drives the lower end of the transmission bar 802 to move upward and drives the gear 801 to rotate.

[0032] When the upper die holder 2 moves downward, it drives the first support rod 101 to rotate downward. The first support rod 101 drives the fourth limiting block 102 to move. The fourth limiting block 102 drives the upper end of the transmission bar 802 to move downward and drives the gear 801 to rotate.

[0033] After the automotive parts are stamping formed, the cylinder 1 drives the upper die holder 2 to move upward. During the upward movement of the upper die holder 2, the fixed rod 703 moves upward. After the fixed rod 703 is no longer in contact with the trapezoidal block 7022, the trapezoidal block 7022 drives the limiting rod four 7021 to leave the limiting groove four 7011 under the drive of the spring four 7024. The fixed rod 703 drives the sliding cylinder 702 to slide upward. The convex block 406 moves upward under the action of the spring three 405. The convex block 406 drives the limiting rod three 603 to leave the limiting groove one 307. The limiting rod two 306 drives the die 303 to move upward under the action of the spring two 308, and the automotive parts are demolded under the action of inertia.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0035] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A stamping die for automotive parts, comprising a cylinder (1) and a buffer assembly (4), characterized in that: A top die base (2) is fixed below the cylinder (1), a bottom die base (3) is fixed above the buffer assembly (4), and the top die base (2) and the bottom die base (3) are in corresponding positions and are adapted to each other; A bracket (5) is provided between the cylinder (1) and the buffer assembly (4), one end of the bracket (5) is fixed on both sides of the cylinder (1), and the other end is fixed on both sides of the buffer assembly (4); The buffer assembly (4) includes a base (401), a first spring (402) and a buffer plate (403). Both sides of the base (401) are fixed to the bracket (5), and both ends of the first spring (402) are respectively fixed to the base (401) and the buffer plate (403); An installation groove one (404) is formed above the buffer plate (403). A third spring (405) is fixed to the bottom of the installation groove one (404), and the other end of the third spring (405) is fixed to a convex block (406). A link mechanism (6) is hinged between the convex block (406) and the installation groove one (404); The bottom die base (3) includes a workbench (301). The workbench (301) is connected to the buffer plate (403) through a first limiting rod (4012). The first limiting rod (4012) penetrates through the buffer plate (403) and is fixed to the bottom die base (3); The top die base (2) includes a support base (201) and a stamping block (206) slidably connected below it. A telescopic mechanism (7) is provided between the support base (201) and the buffer plate (403). The telescopic mechanism (7) includes a fixed cylinder (701), a sliding cylinder (702) and a fixed rod (703). The fixed cylinder (701) is fixed to the buffer plate (403) and is in clearance fit with the convex block (406), and the fixed rod (703) is fixed to the support base (201).

2. The stamping die for an automotive part according to claim 1, wherein: A sliding groove one (2011) is formed below the support base (201), and the sliding groove one (2011) corresponds longitudinally to the convex block (406). A third limiting groove (207) is formed above the stamping block (206), and a second limiting groove (202) is formed below the support base (201). A second limiting block (203) is slidably connected in the second limiting groove (202). A buffer spring (204) is fixed below the second limiting block (203), and the other end of the buffer spring (204) is fixed to a third limiting block (205). The third limiting block (205) is slidably connected in the third limiting groove (207).

3. The stamping die for an automotive part according to claim 2, wherein: The workbench (301) is fixed to the first limiting rod (4012). A groove (302) is formed above the workbench (301), and a mold (303) is placed in the groove (302). A first through hole is formed in the workbench (301). A second support rod (304) is slidably connected in the first through hole. A first limiting block (305) is fixed below the second support rod (304). A second limiting rod (306) is fixed below the first limiting block (305). The other end of the second limiting rod (306) penetrates through the buffer plate (403). A second spring (308) is sleeved on the outer diameter of the second limiting rod (306). One end of the second spring (308) is fixed below the first limiting block (305), and the other end is fixed on the buffer plate (403).

4. The stamping die for an automotive part according to claim 3, characterized in that: The link mechanism (6) includes a first link (601) and a second link (602). A third limiting rod (603) is hinged between the first link (601) and the second link (602). The third limiting rod (603) penetrates through the buffer plate (403) and contacts the outer diameter of the second limiting rod (306). A first limiting groove (307) is formed on the outer diameter of the second limiting rod (306), and the first limiting groove (307) is located above the third limiting rod (603).

5. The stamping die for an automotive part according to claim 4, characterized in that: A fifth limiting groove (4011) is formed in the base (401). A first limiting rod (4012) is slidably connected in the fifth limiting groove (4011). One end of the first limiting rod (4012) is located in the fifth limiting groove (4011), and an inclined angle is formed on the side of the first limiting rod (4012) facing the bracket (5).

6. The stamping die for an automotive part according to claim 5, characterized in that: One end of the sliding cylinder (702) is slidably connected in the fixed cylinder (701), and the other end sleeves the fixed rod (703) and has a clearance fit with the first sliding groove (2011). One end of the fixed rod (703) is fixed in the first sliding groove (2011), and the other end is slidably connected with the sliding cylinder (702).

7. A stamping die for automotive parts according to claim 6, characterized in that: A second sliding groove (7023) is formed in the inner wall of the sliding cylinder (702). A fourth limiting rod (7021) is arranged in the second sliding groove (7023). The fourth limiting rod (7021) penetrates through the inner wall of the sliding cylinder (702) and fits with the fixed cylinder (701). A trapezoidal block (7022) is fixed at the end of the fourth limiting rod (7021) far from the fixed cylinder (701). The inclined surface of the trapezoidal block (7022) faces the fixed rod (703) and is located below it. A fourth spring (7024) is arranged between the second sliding groove (7023) and the trapezoidal block (7022). A fourth limiting groove (7011) is formed in the inner wall of the fixed cylinder (701), and the fourth limiting groove (7011) is located on the sliding path of the fourth limiting rod (7021).

8. The stamping die for an automotive part according to claim 7, characterized in that: Above the support base (201), two first support rods (101) are fixed. The two first support rods (101) are respectively arranged on both sides of the cylinder (1). The first support rods (101) penetrate through the bracket (5) and are slidably connected thereto. An inclined groove (1011) is formed on the outer diameter of the first support rod (101), and the inclined groove (1011) is located inside the bracket (5).

9. The stamping die for an automotive part according to claim 8, wherein: A transmission mechanism (8) is arranged inside the bracket (5). The transmission mechanism (8) is located on both sides of the device. The transmission mechanism (8) includes a gear (801) and two transmission bars (802). The gear (801) is located at the center of the bracket (5). One end of the transmission bar (802) is trapezoidal, and the other end is rack-shaped. The rack ends of the two transmission bars (802) are engaged on both sides of the gear (801), and the trapezoidal ends of the two transmission bars (802) are respectively oriented towards the upper and lower ends of the bracket (5).

10. The stamping die for an automotive part according to claim 9, characterized in that: A limiting block four (102) is slidably connected at the trapezoidal end of one transmission bar (802) and the inclined groove (1011) of the first support rod (101), and a limiting block five (103) is slidably connected at the trapezoidal end of the other transmission bar (802) and the bevel angle of the first limiting rod (4012).

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