Stamping die for automobile part production

Abstract

The invention discloses a stamping die for automobile part production, and relates to the technical field of stamping dies, the stamping die for automobile part production comprises a bottom plate, a female die, a demolding pipe and a resonance piece, an electric push rod drives a connecting plate and an outer pipe sleeve to move downwards to leave the outer contact surface of a part, and an annular gap is exposed; at the moment, an electromagnet is started to give out repulsive magnetic force to push a magnetic block and an elastic piece to move outwards into an exposed annular gap, an outer pipe sleeve moves downwards to expose an inclined outlet in the upper end of a cold air flow channel, and cold air in the female die enters through the lower end of the cold air flow channel and is discharged through the inclined outlet to impact the elastic piece; the elastic piece slightly vibrates under the impact of cold air and resonates with a part in the female die, so that a gap is quickly formed between the elastic piece and the female die, demolding of the part is accelerated, and after the gap is formed between the part and the die, the gap can be further expanded by blowing the cold air into the gap, and the part is helped to be separated.

Description

Technical Field

[0001] The invention relates to the technical field of stamping dies, and more specifically to a stamping die for producing automobile parts. Background Art

[0002] The stamping die used in the production of auto parts is a key equipment specially used to manufacture various auto parts. This die works by placing metal sheets between the dies and then applying high pressure to form them. The metal sheets can be formed into parts of the required shape and size. Stamping dies can efficiently and accurately produce a large number of parts with complex shapes, such as body panels, doors, hoods, etc. The use of stamping dies can greatly reduce the production cost of auto parts and improve production efficiency and product quality. It is an indispensable part of the automotive manufacturing industry.

[0003] Existing stamping dies can produce a large number of auto parts in a short period of time, and modern stamping technology can ensure extremely high processing accuracy, ensuring that each part meets strict quality standards. It can manufacture various types of auto parts, including body structural parts, interior parts, etc. During stamping, pressure is directly applied to the metal sheet through the upper die (or punch), and the metal sheet is supported by the lower die (or die), which cooperates with the upper die to determine the internal shape of the part. The guide assembly can ensure that the upper and lower dies are accurately aligned to avoid deviations during the stamping process. After processing, the finished parts are removed from the die through the demoulding mechanism. In order to cope with the high-intensity working environment, stamping dies are usually made of high-quality alloy steel or other wear-resistant materials. These materials not only need to have good mechanical properties, but also need to have good processing performance to facilitate the manufacture of complex die structures.

[0004] In actual use of the prior art, the mold will exert tremendous pressure during stamping. These pressures will cause the parts formed by stamping to be tightly connected to the mold, resulting in difficulty in demolding. Traditional demolding methods often use ejector mechanisms (such as ejector pins) to eject the parts, or apply a release agent on the mold surface before stamping to reduce the adhesion between the parts and the mold to achieve demolding. Since the ejector pin usually acts on a specific position of the part, this will cause the area to be subjected to greater local stress, which can easily lead to local deformation of the part. The operation of manually applying the release agent in advance is relatively cumbersome, and it is easy to apply unevenly, affecting the processing accuracy of the parts. Therefore, in view of the above technical problems, it is necessary to provide a stamping mold for the production of automotive parts. Summary of the invention

[0005] The object of the present invention is to provide a stamping die for producing automobile parts to solve the above-mentioned problems.

[0006] In order to achieve the above purpose, the technical solution provided by an embodiment of the present invention is as follows: A stamping die for producing automobile parts comprises a bottom plate, a die, a demolding tube and a resonance plate, wherein a plurality of hydraulic rods are symmetrically fixedly connected to the upper surface of the bottom plate, the upper ends of the hydraulic rods are fixedly connected to a top plate, and a convex die is fixedly connected to the middle part of the lower surface of the top plate, comprising an air inlet pipe connected to one side of the die, the air inlet pipe is a three-way pipe, and the other two ends are respectively connected to a hot air pipe and a cold air pipe, the die is connected to an air outlet pipe on the side away from the air inlet pipe, comprising a plurality of outer pipe sleeves movably connected to the inner cavity of the die, the inner cavity of the outer pipe sleeve is movably connected to an inner pipe, the inner cavity of the inner pipe is evenly provided with a plurality of cold air flow channels, and the upper ends of the cold air flow channels are arranged to be inclined upward, comprising a plurality of elastic sheets movably connected to the inner cavity of the inner tube, a magnetic block is fixedly connected to one side of the elastic sheet, an electromagnet is fixedly connected to the middle part of the inner cavity of the inner tube, the electromagnet is magnetically connected to the magnetic block, and a demolding ball is arranged in the inner cavity of the inner tube.

[0007] As a further improvement of the present invention, the center points of the male mold and the female mold are located on the same horizontal line, and valves are installed on the hot air duct, the cold air duct and the air outlet duct.

[0008] As a further improvement of the present invention, a connecting plate is fixedly connected between the plurality of outer tube sleeves, an electric push rod is fixedly connected to the lower surface of the connecting plate, and the lower end of the electric push rod is fixedly connected to the bottom of the inner cavity of the die.

[0009] As a further improvement of the present invention, the upper surface of the connecting plate abuts against the top of the inner cavity of the die, the outer tube sleeve moves on the outer surface of the inner tube, and the lower end of the inner tube is fixedly connected to the bottom of the inner cavity of the die.

[0010] As a further improvement of the present invention, a slide groove is provided below the elastic sheet in the inner cavity of the inner tube, the magnetic block moves in the slide groove, and the number of the elastic sheets is the same as the number of the cold air flow channels.

[0011] As a further improvement of the present invention, the demoulding ball comprises a lightweight ball, there are a plurality of lightweight balls and the lightweight balls are movably connected to the inner cavity of the inner tube, and a plurality of arc-shaped grooves are evenly formed on the outer surface of the lightweight balls.

[0012] As a further improvement of the present invention, a release agent storage cavity is opened in the middle of the inner cavity of the inner tube, and the lightweight ball is arranged in the middle position between the release agent storage cavity and the cold air flow channel.

[0013] As a further improvement of the present invention, the inner cavity of the release agent storage cavity is filled with a release agent, the inner tube is fixedly connected to a release agent filling tube, and the release agent filling tube is communicated with the release agent storage cavity.

[0014] As a further improvement of the present invention, the number of the lightweight balls is the same as that of the cold air flow channels, the outer surface of the release agent filling tube is fixedly connected to the inner cavity of the die, and the lightweight balls are made of lightweight plastic.

[0015] As a further improvement of the present invention, the elastic sheet is made of elastic material, and the concave mold and the convex mold are both made of heat-conducting material.

[0016] Compared with the prior art, the advantages of the present invention are: This solution opens the valve on the hot air pipe to inject heated air into the inner cavity of the die, and ensures the continuous flow of hot air through the outlet pipe to preheat the mold to increase the temperature of the mold. Appropriate heating can increase the plasticity of the material and reduce the formation of cracks, thereby improving the molding performance. At the same time, high temperature can keep the material flexible after molding, thereby reducing the rebound phenomenon of the accessory after demolding. After the stamping is completed, the valves on the hot air pipe and the outlet pipe are closed, and the valve on the cold air pipe is opened to inject cold air into the die to quickly reduce the temperature of the mold and the part, accelerate the hardening process, and help shorten the production cycle. When the part cools rapidly, it shrinks and forms a tiny gap with the mold surface, which helps the subsequent demolding operation. (2) This solution uses an electric push rod to drive the connecting plate and the outer tube sleeve to move downward away from the outer contact surface of the part to expose an annular gap. At this time, the electromagnet is started to emit a repulsive magnetic force to push the magnetic block and the elastic sheet outward to the exposed annular gap. The outer tube sleeve moves downward to expose the inclined outlet at the upper end of the cold air flow channel. The cold air in the die enters through the lower end of the cold air flow channel and is discharged through the inclined outlet, impacting the elastic sheet. The elastic sheet generates slight vibration under the impact of the cold air, resonates with the part in the die, and quickly forms a gap with the die, thereby accelerating the demolding of the part. When a gap is formed between the part and the mold, the gap can be further enlarged by blowing cold air into the gap, thereby helping the part to be released. (3) In this scheme, the cold air flows in the cold air flow channel to blow the lightweight ball to roll. When the lightweight ball rolls, it carries part of the demolding agent in the demolding agent storage cavity into the cold air flow channel through the arc groove. The cold air carries the demolding agent into the gap between the die and the part, thereby accelerating the demolding of the workpiece. Compared with the traditional ejector ejection method, the possibility of damage to the workpiece surface is reduced. At the same time, there is no need to manually apply the demolding agent on the mold in advance, which prevents the early application of the demolding agent, resulting in an increase in the local friction coefficient, an increase in the punching pressure, and scratches on the part surface or wear of the mold. At the same time, it avoids the excessive application of the demolding agent, which leads to inaccurate positioning of the workpiece in the mold and affects the molding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a side view schematic diagram of the overall structure of the present invention; Figure 3 A half-section schematic diagram of the internal structure of the present invention; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 It is a schematic diagram of the structure of the lightweight ball of the present invention; Figure 6 It is a schematic diagram of the demoulding tube structure of the present invention; Figure 7 It is a schematic diagram of the partial structural section breakdown of the present invention.

[0018] Description of the numbers in the figure: 1. Bottom plate; 101. Hydraulic rod; 102. Top plate; 2. Concave mold; 201. Air inlet pipe; 202. Hot air pipe; 203. Cold air pipe; 204. Air outlet pipe; 205. Valve; 3. Punch; 4. Demolding tube; 401. Outer tube sleeve; 402. Connecting plate; 403. Electric push rod; 404. Inner tube; 405. Cold air flow channel; 5. Resonance plate; 501. Elastic plate; 502. Magnetic block; 503. Slide groove; 504. Electromagnet; 6. Demolding ball; 601. Light ball; 602. Arc groove; 603. Demolding agent storage chamber; 604. Demolding agent filling tube. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention. Example

[0020] See also Figure 1-Figure 3 A stamping die for producing automobile parts includes a bottom plate 1, a die 2, a demoulding tube 4 and a resonance plate 5. A plurality of hydraulic rods 101 are symmetrically fixedly connected to the upper surface of the bottom plate 1. A top plate 102 is fixedly connected to the upper end of the hydraulic rod 101. A punch 3 is fixedly connected to the middle of the lower surface of the top plate 102. The die 2 includes an air inlet pipe 201 connected to one side of the die 2. The air inlet pipe 201 is a three-way pipe, and the other two ends are respectively connected to a hot air pipe 202 and a cold air pipe 203. The die 2 is connected to an air outlet pipe 204 on the side away from the air inlet pipe 201.

[0021] Specifically, the center points of the male mold 3 and the female mold 2 are located on the same horizontal line, the hot air pipe 202, the cold air pipe 203 and the air outlet pipe 204 are all installed with valves 205, and the female mold 2 and the male mold 3 are both made of heat-conducting materials.

[0022] Furthermore, the bottom plate 1 serves as the base of the entire system, supporting all other components and providing a stable foundation. The hydraulic rod 101 connects the bottom plate 1 and the top plate 102, and is driven up and down by hydraulic pressure to provide punching pressure. During punching, the raw material metal sheet is placed between the punch 3 and the die 2. The punch 3 is fixed on the top plate 102 and cooperates with the die 2 during stamping to punch the metal sheet into the shape of an automotive accessory. The punch 3 and the die 2 are respectively provided with stamping cavities in the shape of corresponding automotive accessories.

[0023] Before processing, open the valve on the hot air pipe 202 to inject heated air into the inner cavity of the die 2 through the air inlet pipe 201, and ensure the continuous flow of hot air through the air outlet pipe 204 to preheat the mold to increase the temperature of the mold. Appropriate heating can increase the plasticity of the material and reduce the formation of cracks, thereby improving the molding performance. At the same time, high temperature can keep the material flexible after molding, thereby reducing the rebound phenomenon of the part after demolding.

[0024] After stamping, close the valves on the hot air duct 202 and the air outlet duct 204, open the valve on the cold air duct 203 to inject cold air into the die 2, quickly reduce the temperature of the mold and parts, speed up the hardening process, and help shorten the production cycle. When the part cools quickly, it will shrink and form a tiny gap with the mold surface, which will help the subsequent demolding operation. Both the die 2 and the punch 3 are made of heat-conducting materials and have good transfer properties. Example

[0025] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 A stamping die for producing automobile parts includes a plurality of outer tube sleeves 401 movably connected to the inner cavity of a die 2, an inner tube 404 is movably connected to the inner cavity of the outer tube sleeves 401, a plurality of cold air flow channels 405 are evenly opened in the inner cavity of the inner tube 404, and the upper ends of the cold air flow channels 405 are inclined upward.

[0026] Specifically, a connecting plate 402 is fixedly connected between multiple outer tube sleeves 401, and an electric push rod 403 is fixedly connected to the lower surface of the connecting plate 402. The lower end of the electric push rod 403 is fixedly connected to the bottom of the inner cavity of the die 2, and the upper surface of the connecting plate 402 abuts against the top of the inner cavity of the die 2. The outer tube sleeve 401 moves on the outer surface of the inner tube 404, and the lower end of the inner tube 404 is fixedly connected to the bottom of the inner cavity of the die 2.

[0027] Furthermore, the electric push rod 403 is started to drive the connecting plate 402 and the outer tube sleeve 401 to move downward away from the outer contact surface of the part to reveal an annular gap. The outer tube sleeve 401 moves downward to reveal the inclined outlet at the upper end of the cold air flow channel 405. The cold air in the die 2 enters through the lower end of the cold air flow channel 405 and is discharged through the inclined outlet. The lower port of the cold air flow channel 405 is located at the lower end of the inner tube 404 and is exposed in the inner cavity of the die 2. The upper surfaces of the outer tube sleeve 401 and the inner tube 404 are on the same horizontal line as the bottom surface of the stamping cavity inside the die 2, ensuring accuracy during stamping. Example

[0028] See also Figure 1-Figure 7 A stamping die for producing automobile parts includes a plurality of elastic sheets 501 movably connected to the inner cavity of an inner tube 404, a magnetic block 502 is fixedly connected to one side of the elastic sheet 501, an electromagnet 504 is fixedly connected to the middle of the inner cavity of the inner tube 404, the electromagnet 504 is magnetically connected to the magnetic block 502, and a demoulding ball 6 is arranged in the inner cavity of the inner tube 404.

[0029] Specifically, a slide groove 503 is provided below the elastic sheet 501 in the inner cavity of the inner tube 404, and the magnetic block 502 moves in the slide groove 503. The number of elastic sheets 501 is the same as that of the cold air flow channel 405. The demolding ball 6 includes a lightweight ball 601. There are multiple lightweight balls 601 and they are movably connected to the inner cavity of the inner tube 404. Multiple arc grooves 602 are evenly provided on the outer surface of the lightweight ball 601. A demolding agent storage cavity 603 is provided in the middle of the inner cavity of the inner tube 404, and the lightweight ball 601 is arranged in the middle position between the demolding agent storage cavity 603 and the cold air flow channel 405.

[0030] The inner cavity of the release agent storage cavity 603 is filled with release agent, and the inner tube 404 is fixedly connected to the release agent filling tube 604, the release agent filling tube 604 is communicated with the release agent storage cavity 603, the number of lightweight balls 601 is the same as the cold air flow channel 405, the outer surface of the release agent filling tube 604 is fixedly connected to the inner cavity of the die 2, the lightweight balls 601 are made of lightweight plastic, and the elastic sheet 501 is made of elastic material.

[0031] Furthermore, the starting electromagnet 504 emits a repulsive magnetic force to push the magnetic block 502 to move within the slide groove 503 to ensure the moving path. Conversely, the starting electromagnet 504 emits an attractive magnetic force to drive the magnetic block 502 back to its original position to facilitate the next processing operation. The movement of the magnetic block 502 drives the elastic sheet 501 to move outward to the exposed annular gap. There is a small gap between the elastic sheet 501 and the part, which can ensure that the elastic sheet 501 contacts and resonates with it without excessive contact to damage its surface. Compared with the traditional ejector demolding method, the possibility of damage to the workpiece surface is reduced.

[0032] The cold wind impacts the elastic sheet 501, which is an elastic thin sheet. It produces slight vibrations under the impact of the cold wind, resonates with the parts in the die 2, and quickly creates a gap with the die 2, thereby accelerating the demolding of the parts. When a gap is formed between the parts and the mold, the gap can be further expanded by blowing cold air into the gap, thereby helping the parts to be detached.

[0033] When the cold air flows in the cold air channel 405, it will blow the lightweight ball 601 to rotate. The lightweight ball 601 is made of lightweight plastic, is light in weight, and can be easily blown by the wind. When rolling, the lightweight ball 601 carries part of the release agent in the release agent storage cavity 603 through the arc groove 602 into the cold air channel 405, and the cold air carries the release agent into the gap between the die 2 and the part, thereby accelerating the demolding of the workpiece.

[0034] There is no need to manually apply the release agent on the mold in advance. If the release agent is not applied evenly or the thickness is not enough, the local friction coefficient will increase, which will increase the punching pressure and even cause scratches on the part surface or increased mold wear. Avoid applying the release agent too thickly, which may cause inaccurate positioning of the part in the mold, affect the molding accuracy, and may cause the part to slip or deform.

[0035] The release agent filling tube 604 is used to continuously add the release agent to the release agent storage chamber 603. The release agent is divided into two types: liquid and solid. The operator can choose according to the actual situation. The liquid has better fluidity, and the solid can collide with the elastic sheet 501 to help the elastic sheet 501 to better resonate with the parts. At the same time, the collision between the two can also make the solid crushed more thoroughly, so that it can better enter the gap and complete the demolding. The operator can choose according to the actual situation.

[0036] Working principle: During the use of the device, the punching force is provided by the hydraulic rod 101. During punching, the raw material metal sheet is placed between the punch 3 and the die 2. The punch 3 is fixed on the top plate 102 and cooperates with the die 2 during punching to punch the metal sheet into the shape of an automotive part. Before processing, the valve on the hot air pipe 202 is opened to inject heated air into the inner cavity of the die 2 through the air inlet pipe 201, and the hot air is ensured to flow continuously through the air outlet pipe 204 to preheat the mold and improve the forming performance of the part. After the punching is completed, the valves on the hot air pipe 202 and the air outlet pipe 204 are closed, and the valve on the cold air pipe 203 is opened to inject cold air into the die 2 to quickly reduce the temperature of the mold and the part, accelerate the hardening process, and help shorten the production cycle. Then the electric push rod 403 is started to drive the connecting plate 402 and the outer pipe sleeve 401 to move downward away from the outer contact surface of the part to expose the annular gap. At this time, the electromagnet 504 is started to emit a repulsive magnetic force to push the magnetic block 502 in the slide groove 50 3, driving the elastic sheet 501 to move outward to the exposed annular gap. At this time, the outer sleeve 401 moves downward to expose the inclined outlet at the upper end of the cold air flow channel 405. The cold air in the concave mold 2 enters through the lower end of the cold air flow channel 405 and is discharged through the inclined outlet, impacting the elastic sheet 501 to produce a slight vibration, resonating with the parts in the concave mold 2, causing a gap between the elastic sheet 501 and the concave mold 2 to quickly form a gap. The cold air blown into the gap can further expand the gap, helping the parts to detach, and the cold air When wind flows in the cold air channel 405, it will blow the lightweight ball 601 to roll. When rolling, the lightweight ball 601 carries part of the release agent in the release agent storage chamber 603 into the cold air channel 405 through the arc groove 602. The release agent is carried by the cold air into the gap between the die 2 and the part, accelerating the demoulding of the workpiece. The release agent filling tube 604 is used to continuously add the release agent to the release agent storage chamber 603. The release agent is divided into liquid and solid. The operator can choose according to the actual situation.

[0037] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0038] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A stamping die for automobile parts production, characterized in that: include: A bottom plate (1), wherein a plurality of hydraulic rods (101) are symmetrically fixedly connected to the upper surface of the bottom plate (1), the upper ends of the hydraulic rods (101) are fixedly connected to a top plate (102), and a male mold (3) is fixedly connected to the middle of the lower surface of the top plate (102); The concave mold (2) comprises an air inlet pipe (201) connected to one side of the concave mold (2), the air inlet pipe (201) being a three-way pipe, the other two ends of which are respectively connected to a hot air pipe (202) and a cold air pipe (203), and the side of the concave mold (2) away from the air inlet pipe (201) is connected to an air outlet pipe (204); The demoulding tube (4) comprises a plurality of outer tube sleeves (401) movably connected to the inner cavity of the female mold (2), the inner cavity of the outer tube sleeves (401) being movably connected to an inner tube (404), the inner cavity of the inner tube (404) being evenly provided with a plurality of cold air flow channels (405), and the upper ends of the cold air flow channels (405) being arranged to be inclined upwards; The resonance sheet (5) comprises a plurality of elastic sheets (501) movably connected to the inner cavity of an inner tube (404); a magnetic block (502) is fixedly connected to one side of the elastic sheet (501); an electromagnet (504) is fixedly connected to the middle of the inner cavity of the inner tube (404); the electromagnet (504) is magnetically connected to the magnetic block (502); and a demoulding ball (6) is provided in the inner cavity of the inner tube (404).

2. A stamping die for automobile parts production according to claim 1, characterized in that: The concave mold (2) is fixedly connected to the lower surface of the top plate (102), the central points of the convex mold (3) and the concave mold (2) are located on the same horizontal line, and valves (205) are installed on the hot air pipe (202), the cold air pipe (203) and the air outlet pipe (204).

3. The stamping die for automobile parts production according to claim 1, characterized in that: A connecting plate (402) is fixedly connected between the plurality of outer tube sleeves (401), an electric push rod (403) is fixedly connected to the lower surface of the connecting plate (402), and the lower end of the electric push rod (403) is fixedly connected to the bottom of the inner cavity of the concave mold (2).

4. A stamping die for automobile parts production according to claim 3, characterized in that: The upper surface of the connecting plate (402) abuts against the top of the inner cavity of the die (2); the outer tube sleeve (401) moves on the outer surface of the inner tube (404); and the lower end of the inner tube (404) is fixedly connected to the bottom of the inner cavity of the die (2).

5. The stamping die for automobile parts production according to claim 1, characterized in that: A slide groove (503) is provided below the elastic sheet (501) in the inner cavity of the inner tube (404), and the magnetic block (502) moves in the slide groove (503). The number of the elastic sheets (501) is the same as that of the cold air flow channel (405).

6. The stamping die for automobile parts production according to claim 1, characterized in that: The demoulding ball (6) comprises a light ball (601), wherein the light balls (601) are in plurality and movably connected to the inner cavity of the inner tube (404), and the outer surface of the light ball (601) is evenly provided with a plurality of arc-shaped grooves (602).

7. A stamping die for automobile parts production according to claim 6, characterized in that: A release agent storage cavity (603) is provided in the middle of the inner cavity of the inner tube (404), and the lightweight ball (601) is arranged in the middle of the release agent storage cavity (603) and the cold air flow channel (405).

8. The stamping die for automobile parts production according to claim 7, characterized in that: The inner cavity of the release agent storage cavity (603) is filled with a release agent, the inner tube (404) is fixedly connected to a release agent filling tube (604), and the release agent filling tube (604) is in communication with the release agent storage cavity (603).

9. A stamping die for automobile parts production according to claim 8, characterized in that: The number of the lightweight balls (601) is the same as the number of the cold air flow channels (405); the outer surface of the release agent filling tube (604) is fixedly connected to the inner cavity of the concave mold (2); and the lightweight balls (601) are made of lightweight plastic.

10. The stamping die for automobile parts production according to claim 1, characterized in that: The elastic sheet (501) is made of an elastic material, and the concave mold (2) and the convex mold (3) are both made of a heat-conducting material.

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