A stamping die

Abstract

The present invention relates to a stamping die, belonging to the technical field of dies. The die comprises an upper die, a lower die and a separation mechanism, wherein the lower die is mounted on a working table of a stamping device, the upper die is mounted on the bottom surface of a punch head and moves up and down relative to the lower die, the separation mechanism is mounted on the top of the upper die and is used to reduce the viscosity of the oil and the pressure difference between the two; the separation mechanism comprises a compression component and an exhaust component, a circular hole is opened on the top surface of the upper die, one end of the compression component slides and fits the side wall of the circular hole, and the other end abuts against the punch head, the exhaust component is mounted on the top of the compression component and the exhaust end is connected with the exhaust port, the compression component is used to slide into the circular hole and squeeze the gas in the circular hole when the upper die is connected to the punch head, and the exhaust component is used to discharge the compressed gas in the circular hole to the gap between the upper die and the punch head through the exhaust port when the upper die is separated from the punch head; the present invention solves the problem that the upper die is easily dropped when replacing the die in existing large-scale stamping equipment, resulting in damage to the die.

Description

Technical Field

[0001] The invention belongs to the technical field of molds, and in particular relates to a stamping mold. Background Art

[0002] In the automobile manufacturing industry, the early development process needs to consider the simultaneous development of multiple models. Therefore, during the mold development stage, it is necessary to develop molds for each product shape separately, that is, one shape corresponds to a set of molds. Generally, each shape requires three, four, or even five sets of molds. Therefore, during the production process, the molds need to be replaced multiple times to meet production requirements.

[0003] Some of the parts produced need to be stamped multiple times to get the desired product. Therefore, in the existing manufacturing process, in order to improve the efficiency and quality of stamping, some production plants use large-scale stamping equipment to complete multiple stamping processes. These large-scale stamping equipment has a large stamping force, and multiple sets of molds can be installed for simultaneous production. However, there is a problem in the stamping process, that is, after the upper mold is fixed on the stamping, during the production process, the stamping equipment or the mold clamp may leak oil, causing the oil to remain on the top surface of the upper mold. Due to the large stamping force of the large stamping equipment, during the continuous stamping process, the punch head will continuously abut against the top surface of the upper mold, thereby continuously squeezing the oil on the top surface, allowing the oil to fill the gap between the upper mold and the punch head.

[0004] When the mold needs to be replaced for the production of other products, after the clamp is removed, the punch head needs to rise for mold replacement. However, since the gap between the upper mold and the punch head is filled with oil, the adhesion of the oil increases. At the same time, due to the large punching force, the gap between the upper mold and the mold is filled with oil to form a vacuum-like state, which increases the adsorption force between the upper mold and the punch head. This causes the upper mold to move up a distance with the punch head during the upward movement of the punch head, and then falls under the action of gravity, causing damage to the mold. This not only reduces production efficiency, but also causes great economic losses. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a stamping die, which solves the problem that in the process of replacing the die in the existing large-scale stamping equipment, the upper die is easily moved up with the punch head and then falls, causing damage to the die.

[0006] The object of the present invention can be achieved by the following technical scheme: a stamping die, comprising an upper die, a lower die and a separation mechanism, wherein the lower die is installed on a working table of a stamping device, the upper die is installed on the bottom surface of a punch head and moves up and down relative to the lower die, and the separation mechanism is installed on the top of the upper die and is used to reduce the viscosity and pressure difference of the oil therebetween;

[0007] The separation mechanism includes a compression component and an exhaust component. A circular hole is opened on the top surface of the upper mold. One end of the compression component slides in contact with the side wall of the circular hole, and the other end abuts against the punch head. The exhaust component is installed on the top of the compression component and the exhaust end is connected to the exhaust port. The compression component is used to slide into the circular hole and squeeze the gas in the circular hole when the upper mold is connected to the punch head. The exhaust component is used to discharge the compressed gas in the circular hole through the exhaust port to the gap between the upper mold and the punch head when the upper mold is separated from the punch head.

[0008] As a preferred technical solution of the present invention, circular holes are provided at four corners of the top surface of the upper mold, and a plurality of separation mechanisms are provided and are arranged in one-to-one correspondence with the circular holes.

[0009] As a preferred technical solution of the present invention, the compression assembly includes a compression rod, a compression spring and a piston ring. The piston ring is sleeved on the compression rod. The piston ring slides in contact with the side wall of the circular hole. One end of the compression spring abuts against the circular hole, and the other end abuts against the bottom surface of the compression rod.

[0010] As a preferred technical solution of the present invention, an exhaust duct and a slide groove are provided in the compression rod, the exhaust duct is provided along the axis of the compression rod, the slide groove is vertically arranged to the exhaust duct, the exhaust duct is communicated with the slide groove, a mounting groove is provided on one side wall of the circular hole, the exhaust assembly includes a sealing plate and a pressing rod, a through groove is provided on the sealing plate, the sealing plate is rotatably connected to the slide groove and blocks the exhaust duct, the pressing rod is rotatably connected to the mounting groove, when the top surface of the compression rod is flush with the top surface of the upper mold, the mounting groove is aligned with the notch of the slide groove, and the pressing rod will drive the sealing plate to rotate to connect the through groove with the exhaust duct.

[0011] As a preferred technical solution of the present invention, the separation mechanism further includes a torque increasing component, and the pressing rod is connected to the sealing plate via the torque increasing component.

[0012] As a preferred technical solution of the present invention, the torque increasing assembly is composed of a gear transmission component.

[0013] As a preferred technical solution of the present invention, the exhaust assembly also includes a check rod, a mounting plate and a tension spring, the mounting plate is installed on the top of the compression rod, one end of the tension spring is connected to the check rod, and the other end is connected to the mounting plate, and the check rod slides and fits in the exhaust duct.

[0014] As a preferred technical solution of the present invention, it also includes an air valve, which is connected to the bottom of the circular hole.

[0015] As a preferred technical solution of the present invention, the top surface of the upper mold is also provided with a plurality of grooves.

[0016] As a preferred technical solution of the present invention, groove walls of several adjacent grooves form reinforcing ribs.

[0017] The beneficial effects of the present invention are:

[0018] 1. When the upper die is installed on the punch head, the compression assembly in the separation mechanism compresses the air to increase the air pressure in the circular hole. When the die needs to be replaced, after the mold clamp is removed, the punch head moves up to separate from the upper die. The exhaust port of the compression assembly releases the compressed gas, filling the gap between the upper die and the punch head with air. This can reduce the viscosity and pressure difference of the oil between the upper die and the punch head, prevent the upper die from moving up and falling with the punch head, and thus avoid damage to the die. This solves the problem of the upper die falling and causing damage to the die when replacing the die in existing large-scale stamping equipment;

[0019] 2. The check rod is set to prevent the gas in the circular hole from being discharged from the exhaust duct when the air pressure in the circular hole increases, thereby reducing the air pressure in the circular hole, so that the gap between the upper die and the punch head cannot be filled with air during the mold replacement process to reduce the oil viscosity and pressure difference between the upper die and the punch head, so that the punch head will not fall down after the upper die moves up together during the upward movement, causing damage to the mold;

[0020] 3. By setting an air valve on the side wall of the circular hole, when the mold is installed, the air valve can be used to inflate the circular hole to increase the air pressure, so that the gas can be smoothly discharged into the gap between the upper mold and the punch head during the mold replacement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the upper mold structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the separation mechanism structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the sealing plate structure of the present invention;

[0026] Main component symbols

[0027] In the figure: 1. upper die; 11. round hole; 111. mounting groove; 12. groove; 2. lower die; 3. separation mechanism; 31. compression rod; 311. exhaust duct; 312. slide groove; 32. compression spring; 33. piston ring; 34. sealing plate; 341. through groove; 35. pressing rod; 36. check rod; 37. mounting plate; 38. tension spring; 4. exhaust port; 5. torque increasing assembly. DETAILED DESCRIPTION

[0028] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0029] See also Figure 1-4 The present embodiment provides a stamping die, comprising an upper die 1, a lower die 2 and a separation mechanism 3, wherein the lower die 2 is mounted on a working table of a stamping device, the upper die 1 is mounted on the bottom surface of a punch head and moves up and down relative to the lower die 2, and the separation mechanism 3 is mounted on the top of the upper die 1 and is used to reduce the viscosity of the oil and the pressure difference between the upper die and the lower die 2;

[0030] The separation mechanism 3 includes a compression component and an exhaust component. A circular hole 11 is provided on the top surface of the upper mold 1, so that the compression component can slide in the circular hole 11 and the compression component fits with the inner wall of the circular hole 11. When the upper mold 1 is installed on the bottom surface of the punch head, it is first connected to the upper mold 1 through the clamping device on the bottom surface of the punch head. At this time, there will be a certain distance between the upper mold 1 and the punch head. When the connection is completed, the clamping device is started to fix the upper mold 1 on the bottom surface of the punch head. When the clamping device contracts to tighten the upper mold 1 and the punch head, the bottom surface of the punch head will squeeze the compression component into the circular hole 11 first, so that the compression component squeezes the air in the circular hole 11, so that the air in the circular hole 11 is in a high-pressure state, and when the mold is pressed. When replacing the mold, separate the clamping device from the upper mold 1, and then move the punch head up to leave the upper mold 1 to facilitate the replacement of the mold. During the process of the punch head moving up, the oil leaked from the punch head will gradually fill the gap between the punch head and the upper mold 1, thereby forming adhesion. At the same time, these oils will expel the air between the punch head and the upper mold 1 during the continuous stamping process, so that a negative pressure is formed between the punch head and the upper mold 1, thereby causing a certain adsorption force to be formed between the upper mold 1 and the punch head. The adsorption force will cause the upper mold 1 to move up together with the punch head for a distance before starting to fall during the process of separating the upper mold 1 from the punch head, thereby causing the upper mold 1 to collide with the upper mold 1, causing damage to the mold.

[0031] Therefore, when the punch head is separated from the upper mold 1, since the circular hole 11 is opened on the top surface of the upper mold 1, during the separation process, the distance between the punch head and the upper mold 1 will gradually increase. During the change process, the compression component no longer squeezes the circular hole 11, so that the compressed gas in the circular hole 11 will be gradually discharged through the exhaust port 4 via the exhaust component located on the top surface of the compression component, so that the gap between the upper mold 1 and the punch head is gradually filled with air, thereby reducing the negative pressure effect between the upper mold 1 and the punch head and reducing the adsorption force, so that when the upper mold 1 is separated from the punch head, it can be avoided that the upper mold 1 moves up with the punch head and then falls, causing damage to the mold.

[0032] In the manufacturing process of automobile parts, some parts need to be stamped multiple times to complete the production process, such as the rear panel of the automobile. In order to ensure the quality and production efficiency of the stamped products, some production workshops will use large-scale stamping equipment for stamping. During the stamping process, the molds will be installed in sequence according to the stamping sequence. During the installation process, the upper mold 1 of the mold is installed on the stamping head through the clamp, and the lower mold 2 is installed on the working platform of the stamping equipment. During the stamping process after the installation is completed, the hydraulic oil in the clamp and the stamping equipment will cause the upper mold 1 to be stuck to the stamping head due to various factors. The gap between the punch heads, and in the continuous stamping production process, the gap between the upper die 1 and the punch head is gradually filled, therefore, this leads to an increase in the adhesion between the upper die 1 and the punch head, and because the punching force of the stamping equipment is much greater than the punching force of other small stamping equipment, therefore, in the continuous stamping process, the air filled in the oil gap is continuously squeezed, resulting in a decrease in the air pressure in the gap, making the air pressure in the gap lower than the external air pressure, thereby forming a pressure difference, therefore, under the action of the oil adhesion and the pressure difference, the upper die 1 can be more firmly connected to the punch head.

[0033] Therefore, when replacing the mold, after the mold clamp is disassembled, the punch head is raised to open space for replacing the mold. Since the upper mold 1 is still connected to the punch head due to the oil adhesion and pressure difference, if the punch head is directly raised at this time, the upper mold 1 will also move up with the punch head. In the process of the upper mold 1 moving upward, the oil adhesion will be pulled by gravity, and the oil adhesion will gradually decrease during the pulling process. At the same time, the air between the gaps will gradually increase, and the pressure difference will decrease, causing the upper mold 1 to fall again after rising a certain distance and collide with the lower mold 2, thereby damaging the mold, causing economic losses and affecting production efficiency.

[0034] In order to avoid the above situation, a circular hole 11 is opened on the top surface of the upper mold 1, and a separation mechanism 3 is set in the circular hole 11. The compression component in the separation mechanism 3 compresses the air in the circular hole 11 during the installation of the upper mold 1 to increase the air pressure in the circular hole 11. When the mold needs to be replaced, the exhaust component discharges the compressed air in the circular hole 11 into the gap to reduce the pressure difference in the gap. At the same time, when the gas in the gap flows, it will also reduce the contact area between the oil and the punch head, thereby reducing the adhesion force, so that the gravity of the upper mold 1 can overcome the adhesion force during the rising process of the punch head and remain stable on the lower mold 2, thereby avoiding the situation that the upper mold 1 moves up with the punch head under the action of adhesion and then falls and collides with the lower mold 2, causing damage to the mold.

[0035] Since the parts produced by automobiles are large in size, the size of the mold itself is also large. Therefore, the larger the contact area between the upper mold 1 and the punch head, the greater the adhesion of the oil. In order to reduce the adhesion of the oil during the process of changing the mold, in this embodiment, circular holes 11 are opened at the four corners of the top surface of the upper mold 1, and the separation mechanism 3 is provided with multiple and one-to-one corresponding to the circular holes 11. By opening circular holes 11 at the four corners of the upper mold 1, the exhaust volume of the exhaust component is increased, thereby better reducing the adhesion and ensuring the stability of the upper mold 1 when changing the mold.

[0036] In order to allow the upper mold 1 to be more smoothly separated from the punch head during mold replacement, in one embodiment, the compression assembly includes a compression rod 31, a compression spring 32 and a piston ring 33. The piston ring 33 is sleeved on the compression rod 31, and the piston ring 33 slides and fits against the side wall of the circular hole 11. One end of the compression spring 32 abuts against the circular hole 11, and the other end abuts against the bottom surface of the compression rod 31. The piston ring 33 is used to keep the compression rod 31 sealed against the circular hole 11 during the sliding process. When the upper mold 1 is installed, the punch head descends and abuts against the top surface of the upper mold 1, and the compression rod 31 is squeezed into the circular hole 11 by the punch head, thereby compressing the space in the circular hole 11, allowing the circular hole 11 to be opened. 1 increases, and when the mold is replaced, the compressed air in the circular hole 11 is discharged through the exhaust port 4 to reduce the adhesion force, and at the same time, when the squeezed compression spring 32 is separated from the upper mold 1 and the punch head moves upward, the compression rod 31 no longer provides pressure to the compression spring 32, and the compression spring 32 releases the compressed elastic force to push the compression rod 31 to separate the upper mold 1 from the punch head, so that the elastic force of the compression spring 32 can further offset the adhesion force of the oil between the upper mold 1 and the punch head to better separate the upper mold 1 from the punch head, thereby ensuring the stability of the upper mold 1 when the mold is replaced, and allowing the compression rod 31 to return to its original position for the next compression.

[0037] In order to further increase the pressure of the compressed gas in the circular hole 11, a rectangular groove is opened at the bottom of the circular hole 11, and the rectangular groove is communicated with the circular hole 11. Therefore, during the extrusion process, the bottom of the compression rod 31 slides and fits with the rectangular groove, allowing the piston ring 33 to gradually move into the rectangular groove, thereby squeezing the space in the rectangular groove. By compressing a larger space, the pressure of the compressed gas is increased, so that the compressed gas can be better discharged into the gap between the upper mold 1 and the punch head when the mold is replaced.

[0038] In order to better discharge the compressed air in the circular hole 11, in one embodiment, an exhaust passage 311 and a slide groove 312 are provided in the compression rod 31, the exhaust passage 311 is provided along the axis of the compression rod 31, the slide groove 312 is vertically arranged with the exhaust passage 311, the exhaust passage 311 is communicated with the slide groove 312, a mounting groove 111 is provided on one side wall of the circular hole 11, the exhaust assembly includes a sealing plate 34 and a pressing rod 35, a through groove 341 is provided on the sealing plate 34, the sealing plate 34 is rotatably connected in the slide groove 312 and blocks the exhaust passage 311, the pressing rod 35 is rotatably connected in the mounting groove 111, and when the top surface of the compression rod 31 is flush with the top surface of the upper mold 1, the notch of the mounting groove 111 and the slide groove 312 Aligned, the pressing rod 35 will drive the sealing plate 34 to rotate so that the through groove 341 is connected with the exhaust duct 311. When the clamping device is disassembled, the punch head has not moved up yet. The top surface of the compression rod 31 is flush with the top surface of the upper mold 1, and the position of the pressing rod 35 corresponds to the position of the sealing plate 34. At this time, the sealing plate 34 is rotated by rotating the pressing rod 35 to connect the through groove 341 on the sealing plate 34 with the exhaust duct 311, so that the compressed air in the circular hole 11 is discharged from the exhaust port 4 through the exhaust duct 311 to reduce adhesion, so that the upper mold 1 can stay stably on the lower mold 2, avoiding the upper mold 1 from falling after being driven to move up and causing damage to the mold.

[0039] When the compression rod 31 slides into the circular hole 11 until it is flush with the top surface of the upper mold 1, the pressing rod 35 is rotated to drive the sealing plate 34. A guide groove is provided on the side wall of the circular hole 11, and a guide bar is provided on the top of the compression rod 31. The guide bar and the guide groove are slidably arranged. The position of the compression rod 31 during the sliding process is limited by the setting of the guide groove and the guide bar, ensuring that the sealing plate 34 can be on the same axis as the pressing plate. After the compression of the compression rod 31 is completed, the pressing rod 35 can be rotated to correspond to the position of the sealing plate 34 to complete the exhaust action.

[0040] In order to prevent the compression rod 31 from interfering with the pressing rod 35 during the rising process, which may cause the pressing rod 35 to get stuck in the compression rod 31 and prevent the compression rod 31 from rising smoothly for the next compression, the pressing rod 35 can also slide in the mounting groove 111. When the sealing plate 34 needs to be rotated, the pressing rod 35 is pushed toward the compression rod 31 so that the pressing rod 35 is engaged with the sealing plate 34 to complete the rotation of the sealing plate 34. After the rotation is completed, the pressing rod 35 is retracted to prevent the compression rod 31 from getting stuck during the sliding process.

[0041] In order to better drive the sealing plate 34 to rotate during the rotation of the pressing rod 35, in one embodiment, the separation mechanism 3 also includes a torque increasing component 5, and the pressing rod 35 is connected to the sealing plate 34 through the torque increasing component 5. The torque increasing component 5 is equivalent to a reducer structure. The torque increasing component 5 is used to increase the rotation force of the pressing rod 35, so that the sealing plate 34 can be driven to rotate more easily.

[0042] Since there are many different structures that can be realized for the torque increasing component 5, in one embodiment, the torque increasing component 5 is composed of a gear transmission component. The torque increasing component 5 composed of a gear transmission component can be completed by a structure similar to a reducer, that is, a small gear is used to drive a large gear to increase the output torque while reducing speed, so that the pressing rod 35 can better drive the sealing plate 34 to rotate when rotating.

[0043] In order to prevent external oil from entering the exhaust passage 311 through the exhaust port 4 and blocking the exhaust passage 311, in one embodiment, the exhaust assembly also includes a check rod 36, a mounting plate 37 and a tension spring 38. The mounting plate 37 is installed on the top of the compression rod 31, one end of the tension spring 38 is connected to the check rod 36, and the other end is connected to the mounting plate 37. The check rod 36 slides and fits in the exhaust passage 311, and the top of the exhaust passage 311 is blocked by the check rod 36. When the gas in the circular hole 11 needs to be discharged, the sealing plate 34 is opened to connect the exhaust passage 311 with the circular hole 11. Since the air pressure in the circular hole 11 is greater than the external air pressure, the air pressure will push the check rod 36 to slide outward, so that the top of the check rod 36 is located outside the exhaust port 4, so that the gas can flow out from the gap at the head of the check rod 36 to fill the gap between the upper mold 1 and the punch head, thereby reducing adhesion.

[0044] In order to ensure that the air pressure in the circular hole 11 is large enough, when replacing the mold, sufficient air can be discharged into the gap between the upper mold 1 and the punch head to reduce the adhesion. In one embodiment, an air valve is also included, and the air valve is connected to the bottom of the circular hole 11. When the upper mold 1 is installed, gas can be filled into the circular hole 11 through the air valve to increase the air pressure in the circular hole 11, thereby ensuring that when replacing the mold, the adhesion of the oil can be reduced as much as possible to allow the upper mold 1 to stay steadily on the lower mold 2 to complete the replacement of the mold.

[0045] In order to further reduce the contact area between the upper mold 1 and the punch head to reduce the adhesion, in one embodiment, a plurality of grooves 12 are further provided on the top surface of the upper mold 1. By providing a plurality of grooves 12 on the top surface of the upper mold 1, the top surface area of ​​the upper mold 1 is reduced, so that the contact area between the upper mold 1 and the punch head is reduced, thereby reducing the adhesion of the oil.

[0046] When the top surface of the upper mold 1 is grooved to reduce the adhesion of the oil, in order to ensure the structural strength of the upper mold 1, in one embodiment, the groove walls of several adjacent grooves 12 form reinforcing ribs, so that the groove walls of adjacent grooves 12 form reinforcing ribs to improve the structural strength of the upper mold 1. At the same time, the opening of the grooves 12 reduces the weight of the upper mold 1 and reduces the burden on the punch head.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A stamping die, characterized in that: It includes an upper die, a lower die and a separation mechanism, wherein the lower die is installed on the working table of the stamping equipment, the upper die is installed on the bottom surface of the stamping head and moves up and down relative to the lower die, and the separation mechanism is installed on the top of the upper die and is used to reduce the viscosity and pressure difference of the oil between the upper die and the stamping head; The separation mechanism includes a compression component and an exhaust component. A circular hole is opened on the top surface of the upper die. One end of the compression component slides and fits against the side wall of the circular hole, and the other end abuts against the punch head. The exhaust component is installed on the top of the compression component and the exhaust end is connected to the exhaust port of the compression component. The compression component is used to slide into the circular hole and squeeze the gas in the circular hole when the upper die is connected to the punch head. The exhaust component is used to discharge the compressed gas in the circular hole to the gap between the upper die and the punch head through the exhaust port when the upper die is separated from the punch head. The compression assembly comprises a compression rod, a compression spring and a piston ring, wherein the piston ring is sleeved on the compression rod and slidably fits against the side wall of the circular hole, one end of the compression spring abuts against the circular hole, and the other end abuts against the bottom surface of the compression rod; An exhaust passage and a slide groove are provided in the compression rod, the exhaust passage is provided along the axis of the compression rod, the slide groove is vertically arranged to the exhaust passage, the exhaust passage is communicated with the slide groove, a mounting groove is provided on one side wall of the circular hole, the exhaust assembly comprises a sealing plate and a pressing rod, a through groove is provided on the sealing plate, the sealing plate is rotatably connected to the slide groove and blocks the exhaust passage, the pressing rod is rotatably connected to the mounting groove, the mounting groove is aligned with the notch of the slide groove when the top surface of the compression rod is flush with the top surface of the upper mold, the pressing rod will drive the sealing plate to rotate so that the through groove is communicated with the exhaust passage; The exhaust assembly also includes a check rod, a mounting plate and a tension spring. The mounting plate is installed on the top of the compression rod. One end of the tension spring is connected to the check rod, and the other end is connected to the mounting plate. The check rod slides and fits in the exhaust duct.

2. A stamping die according to claim 1, characterized in that: Circular holes are provided at four corners of the top surface of the upper mold, and a plurality of separation mechanisms are provided and are arranged one-to-one corresponding to the circular holes.

3. A stamping die according to claim 2, characterized in that: The separation mechanism further comprises a torque increasing assembly, and the pressing rod is connected to the sealing plate via the torque increasing assembly.

4. A stamping die according to claim 3, characterized in that: The torque increasing assembly is composed of gear transmission components.

5. A stamping die according to claim 4, characterized in that: It also includes an air valve, which is communicated with the bottom of the circular hole.

6. A stamping die according to claim 5, characterized in that: The top surface of the upper mold is also provided with a plurality of grooves.

7. A stamping die according to claim 6, characterized in that: The groove walls of a plurality of adjacent grooves form reinforcing ribs.

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