A gasket stamping device for automotive transmissions and its application method

Abstract

This invention discloses a stamping device for automotive transmission gaskets and its usage method, relating to the technical field of stamping devices. It includes an upper die assembly and a lower die assembly, with the lower die assembly located below the upper die assembly. The upper die assembly includes an upper die base and a stamping mechanism, which is disposed at the bottom of the upper die base. The lower die assembly includes a base plate and a lower die base. The base plate is mounted on the bottom of the lower die base via mounting rods. Guide rods are installed on the edges of both the upper and lower die bases. The stamping mechanism includes a hydraulic cylinder, a pressure-relieving combination plate, and at least one variable-diameter punch assembly. The hydraulic cylinder is fixedly mounted on the top of the upper die base. This invention, through the variable-diameter punch assembly, facilitates the production of transmission gaskets of different diameters. Furthermore, when adjusting the punching diameter, the distance between the bottom of the variable-diameter punch assembly and the lower die base can be automatically adjusted to maintain the same spacing between adjacent punched grooves after punching the material before and after diameter adjustment. Therefore, it maintains efficiency and high material utilization with minimal adjustment operations.

Description

Technical Field

[0001] This invention relates to the field of stamping equipment technology, and more specifically to a stamping device for gaskets used in automotive transmissions. Background Technology

[0002] A transmission gasket is a gasket used to seal between internal parts of a transmission. Its main function is to prevent oil leakage and maintain internal pressure. Metal transmission gaskets are more commonly used, and they are generally processed using stamping equipment.

[0003] CN119608976A discloses a gasket stamping device for electric vehicle gearboxes, belonging to the field of stamping equipment technology. It includes: a base with a top plate on its top and two sets of conveying mechanisms at its bottom; a stamping die including a lower die and an upper die, the lower die having a punching hole and a punching groove on its top; and a hydraulic drive mechanism including an oil reservoir, an oil pump, a reversing valve, an oil distribution tank, and multiple hydraulic cylinders. The top of each hydraulic cylinder is connected to the oil distribution tank, a piston plate is slidably installed inside the hydraulic cylinder, and a piston rod is fixedly installed at the bottom of the piston plate.

[0004] The drilling equipment in the above technical solution has certain shortcomings in use. There are many specifications of gearbox gaskets. A single gearbox or different gearboxes need to use gaskets of different specifications. When producing different gaskets, different punch structures need to be changed. In addition, the feeding and conveying speed generally needs to be adjusted according to the gasket specifications. Therefore, many adjustments are required when producing gaskets of different specifications, which will affect production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a stamping device for gaskets used in automotive transmissions and its usage method, which solves the problem that different punch structures need to be changed when producing different gaskets, and that the feeding speed generally needs to be adjusted according to the gasket specifications.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution: The present invention includes an upper module and a lower module, the lower module being located below the upper module; the upper module includes an upper die base and a stamping mechanism, the stamping mechanism being disposed at the bottom of the upper die base; the lower module includes a base plate and a lower die base, the base plate being mounted on the bottom of the lower die base by a mounting rod; and guide rods are installed on the edges of both the upper die base and the lower die base.

[0007] The stamping mechanism includes a hydraulic cylinder, a pressure-relieving combination plate, and at least one variable diameter punch assembly. The hydraulic cylinder is fixedly installed on the top of the upper die base. The pressure-relieving combination plate passes through the guide rod and is installed at the output end of the hydraulic cylinder. The variable diameter punch assemblies are arranged in a row at the bottom of the pressure-relieving combination plate. The variable diameter punch assemblies are used to produce gearbox gaskets of different diameters and automatically adjust the distance between the bottom of the variable diameter punch assembly and the lower die base when adjusting the punching diameter to keep the spacing between adjacent punch slots the same after punching the material before and after the diameter change.

[0008] The lower die base is provided with a forming groove corresponding to the variable diameter punch assembly.

[0009] Preferably, the pressure-relieving combination plate includes a movable plate, a mounting plate, multiple limiting rods, and multiple pressure-relieving springs. Guide holes are provided on both sides of the movable plate, and the guide rods are engaged in the guide holes. The mounting plate is disposed at the bottom of the movable plate, and multiple positioning holes are provided on both the front and rear sides of the mounting plate. The top of the limiting rod passes through the positioning hole and is fixedly installed to the bottom of the movable plate. The pressure-relieving spring is sleeved on the limiting rod and is disposed between the movable plate and the mounting plate.

[0010] Preferably, the variable diameter punch assembly includes a mounting shell, a fixed cylinder, an inner punch, an outer punch, a servo motor, and a bidirectional lead screw. The mounting shell is fixedly installed at the bottom of the mounting plate, the fixed cylinder is fixedly installed at the bottom of the mounting shell, the outer punch is slidably engaged in the fixed cylinder, and the outer punch is a cylindrical structure with an opening at the bottom. The inner punch is slidably engaged in the outer punch, the servo motor is fixedly installed in the mounting shell, and the bidirectional lead screw is installed at the output end of the servo motor. A first screw hole is opened at the top of the outer punch, and a second screw hole is opened at the top of the inner punch. The two ends of the bidirectional lead screw are respectively engaged with the first screw hole and the second screw hole.

[0011] Preferably, the inner wall of the fixed cylinder is provided with a first sliding groove on both sides, the outer punch cylinder is provided with a first slider on both sides, the first slider is locked in the first sliding groove, the inner wall of the outer punch cylinder is provided with a second sliding groove on both sides, the inner punch is provided with a second slider on both sides, the second slider is locked in the second sliding groove.

[0012] Preferably, a central punch rod is fixedly installed on the base plate, the top of the central punch rod is set in the forming groove, and a central slot is opened at the center of the bottom of the inner punch, with the central punch rod corresponding to the central slot.

[0013] Preferably, the bottom of the lower die holder is provided with a diameter control component for changing the diameter of the forming groove according to the diameter change of the variable diameter punch assembly.

[0014] Preferably, the variable diameter control assembly includes an electric telescopic rod, a control plate, and multiple variable diameter cylinders. The bottom of the lower mold base has an installation groove, the electric telescopic rod is fixedly installed in the installation groove, the control plate is installed at the output end of the electric telescopic rod, the control plate has multiple installation holes corresponding to the forming groove, the variable diameter cylinder is installed at the top of the installation hole, the central punch rod passes through the variable diameter cylinder, and the diameter of the outer punch cylinder is the same as the diameter of the variable diameter cylinder.

[0015] Preferably, a discharge assembly for removing the gearbox gasket from the forming groove is provided above the base plate.

[0016] Preferably, the discharge assembly includes a cylinder, a discharge plate, and multiple discharge cylinders. The base plate has a receiving groove, and the cylinder is fixedly installed in the receiving groove. The discharge plate has multiple fixing holes corresponding to the forming groove. The discharge cylinders are fixedly installed at the top of the fixing holes. The discharge cylinders are positioned between the central punch rod and the reducing cylinder. The diameter of the discharge cylinder is the same as the diameter of the inner punch.

[0017] A method of using a gasket stamping device for automotive transmissions includes the following steps:

[0018] S1. Variable diameter adjustment: The variable diameter punch assembly can be used to produce two different diameter transmission shims, and can be adjusted to the required radius according to production needs;

[0019] S2, Stamping operation: The metal material passes over the lower die base through the external feeding structure. When it passes, the hydraulic cylinder can push the stamping mechanism to move downward. The stamping mechanism and the lower die can stamp the metal material into a gearbox gasket.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The present invention can easily produce gearbox gaskets of different diameters through the variable diameter punch assembly. When adjusting the punching diameter, the distance between the bottom of the variable diameter punch assembly and the lower die base can be automatically adjusted to keep the spacing between adjacent punch slots after punching the material before and after the diameter change is the same. Therefore, it can maintain efficiency and high material utilization with minimal adjustment operations.

[0022] 2. The present invention can facilitate the quick discharge of the produced gaskets after stamping through the material discharge component, thereby improving production efficiency. Attached Figure Description

[0023] Figure 1 This is a structural view of the present invention;

[0024] Figure 2 This is a structural view of the upper module of the present invention;

[0025] Figure 3 This is a structural view of the variable diameter punch assembly of the present invention;

[0026] Figure 4 This is an exploded bottom view of the variable diameter punch assembly of the present invention;

[0027] Figure 5 This is an exploded top view of the variable diameter punch assembly of the present invention;

[0028] Figure 6 This is an exploded view of the lower module of the present invention;

[0029] Figure 7 This is a cross-sectional view of the present invention (in use as described in Embodiment 1).

[0030] Figure 8 This is a cross-sectional view of the present invention (in use in Embodiment 2);

[0031] Figure 9 The state of the material after processing using the stamping device of Example 1;

[0032] Figure 10 The state of the material after processing using the stamping device of Example 2.

[0033] The numbers in the image represent:

[0034] 1. Upper module; 2. Lower module; 3. Upper die base; 4. Stamping mechanism; 401. Hydraulic cylinder; 402. Pressure-relieving combination plate; 4021. Moving plate; 4022. Mounting plate; 4023. Limiting rod; 4024. Pressure-relieving spring; 403. Variable diameter punch assembly; 4031. Mounting shell; 4032. Fixed cylinder; 4033. Inner punch; 4034. Outer punch cylinder; 4035. Servo motor; 4036. Two-way lead screw; 5. Base plate; 6. Lower die base; 7. Guide rod ; 8. Forming groove; 9. Guide hole; 10. First screw hole; 11. Second screw hole; 12. First slide groove; 13. First slider; 14. Second slide groove; 15. Second slider; 16. Center punch rod; 17. Center slot hole; 18. Variable diameter control assembly; 1801. Electric telescopic rod; 1802. Control board; 1803. Variable diameter cylinder; 19. Mounting hole; 20. Discharge assembly; 2001. Cylinder; 2002. Discharge plate; 2003. Discharge cylinder; 21. Fixing hole. Detailed Implementation

[0035] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0036] Example 1: This example provides a technical solution: a stamping device for a gasket for an automotive gearbox, including an upper mold assembly 1 and a lower mold assembly 2. The lower mold assembly 2 is located below the upper mold assembly 1. The upper mold assembly 1 includes an upper mold base 3 and a stamping mechanism 4. The stamping mechanism 4 is disposed at the bottom of the upper mold base 3. The lower mold assembly 2 includes a base plate 5 and a lower mold base 6. The base plate 5 is mounted on the bottom of the lower mold base 6 by a mounting rod. Guide rods 7 are installed on the edges of both the upper mold base 3 and the lower mold base 6.

[0037] In specific implementations, such as Figure 1 and Figure 2 As shown, the stamping mechanism 4 includes a hydraulic cylinder 401, a pressure-relieving combination plate 402, and at least one variable diameter punch assembly 403. The hydraulic cylinder 401 is fixedly installed on the top of the upper die base 3. The pressure-relieving combination plate 402 passes through the guide rod 7 and is installed at the output end of the hydraulic cylinder 401. The variable diameter punch assemblies 403 are arranged in a row at the bottom of the pressure-relieving combination plate 402. The variable diameter punch assemblies 403 are used to produce gearbox gaskets of different diameters and automatically adjust the distance between the bottom of the variable diameter punch assembly 403 and the lower die base 6 when adjusting the punching diameter to keep the spacing between adjacent punch slots after punching the material before and after the diameter change is the same. The lower die base 6 has forming grooves 8 corresponding to the variable diameter punch assembly 403.

[0038] In specific implementations, such as Figure 2 As shown, the pressure-relieving combination plate 402 includes a movable plate 4021, a mounting plate 4022, multiple limiting rods 4023, and multiple pressure-relieving springs 4024. Guide holes 9 are provided on both sides of the movable plate 4021, and the guide rods 7 are locked in the guide holes 9. The mounting plate 4022 is located at the bottom of the movable plate 4021. Multiple positioning holes are provided on the front and rear sides of the mounting plate 4022. The top of the limiting rods 4023 passes through the positioning holes and is fixedly installed to the bottom of the movable plate 4021. The pressure-relieving springs 4024 are sleeved on the limiting rods 4023 and are located between the movable plate 4021 and the mounting plate 4022. During stamping, the hydraulic cylinder 401 pushes the pressure-relieving combination plate 402 downward, and the variable diameter punch assembly 403 at the bottom punches the material into the forming groove 8 to complete the punching. Subsequently, the movable plate 4021 and the mounting plate 4022 can squeeze the pressure-relieving springs 4024 to ensure safety.

[0039] In specific implementations, such as Figures 3-5As shown, the variable diameter punch assembly 403 includes a mounting shell 4031, a fixed cylinder 4032, an inner punch 4033, an outer punch 4034, a servo motor 4035, and a bidirectional lead screw 4036. The mounting shell 4031 is fixedly mounted on the bottom of the mounting plate 4022, and the fixed cylinder 4032 is fixedly mounted on the bottom of the mounting shell 4031. The outer punch 4034 is slidably engaged within the fixed cylinder 4032. The outer punch 4034 is a cylindrical structure with an opening at the bottom. The inner punch 4033 is slidably engaged within the outer punch 4034. The machine 4035 is fixedly installed inside the mounting housing 4031. The bidirectional lead screw 4036 is installed at the output end of the servo motor 4035. The top of the outer punch 4034 has a first screw hole 10, and the top of the inner punch 4033 has a second screw hole 11. The two ends of the bidirectional lead screw 4036 are respectively engaged with the first screw hole 10 and the second screw hole 11. The inner punch 4033 is completely located inside the outer punch 4034. At this time, the bottom of the inner punch 4033 is flush with the bottom of the outer punch 4034, and it can punch a gasket with the same diameter as the outer punch 4034.

[0040] Furthermore, the inner wall of the fixed cylinder 4032 is provided with first sliding grooves 12 on both sides, the outer punch 4034 is provided with first sliders 13 on both sides, the first sliders 13 are locked in the first sliding grooves 12, the inner wall of the outer punch 4034 is provided with second sliding grooves 14 on both sides, and the inner punch 4033 is provided with second sliders 15 on both sides, the second sliders 15 are locked in the second sliding grooves 14. Therefore, it can be ensured that the outer punch 4034 can be stably set in the fixed cylinder 4032, and the inner punch 4033 can be stably set in the outer punch 4034.

[0041] In specific implementations, such as Figure 6 and Figure 7 As shown, a central punch rod 16 is fixedly installed on the base plate 5. The top of the central punch rod 16 is set in the forming groove 8. A central slot 17 is opened at the center of the bottom of the inner punch 4033. The central punch rod 16 corresponds to the central slot 17.

[0042] Furthermore, the bottom of the lower die base 6 is provided with a diameter change control component 18 for changing the diameter of the forming groove 8 according to the diameter change of the variable diameter punch assembly 403. The diameter change control component 18 includes an electric telescopic rod 1801, a control plate 1802 and multiple variable diameter cylinders 1803. The bottom of the lower die base 6 is provided with an installation groove, the electric telescopic rod 1801 is fixedly installed in the installation groove, the control plate 1802 is installed at the output end of the electric telescopic rod 1801, and multiple installation holes 19 corresponding to the forming groove 8 are provided on the control plate 1802. The variable diameter cylinders 1803 are installed at the top of the installation holes 19, the central punch rod 16 passes through the variable diameter cylinder 1803, and the diameter of the outer punch 4034 is the same as the diameter of the variable diameter cylinder 1803. At this time, the electric telescopic rod 1801 is in the extended state, and the top of the variable diameter cylinder 1803 is flush with the top of the central punch rod 16.

[0043] In the specific implementation, a discharge assembly 20 for removing the gearbox gasket from the forming groove 8 is provided above the base plate 5. The discharge assembly 20 includes a cylinder 2001, a discharge plate 2002, and multiple discharge cylinders 2003. A receiving groove is provided on the base plate 5, and the cylinder 2001 is fixedly installed in the receiving groove. Multiple fixing holes 21 corresponding to the forming groove 8 are provided on the discharge plate 2002, and the discharge cylinders 2003 are fixedly installed on the top of the fixing holes 21. The discharge cylinders 2003 are engaged in the center punch hole. Between rod 16 and reducing cylinder 1803, the diameter of discharge cylinder 2003 is the same as the diameter of inner punch 4033. The top of discharge cylinder 2003 is flush with the top of center punch rod 16. After punching, the gasket can remain in the forming groove 8. Cylinder 2001 controls discharge plate 2002 and discharge cylinder 2003 to move upward. Discharge cylinder 2003 can push the gasket upward from the forming groove 8. With the help of external airflow or the neatly tilted setting of the stamping device, the gasket can be easily discharged from the forming groove 8.

[0044] This embodiment is used to process a gearbox gasket with the same diameter as the outer punch 4034. During processing, the metal material passes over the lower die base 6 through an external feeding structure. As it passes, the hydraulic cylinder 401 pushes the stamping mechanism 4 downwards, and the moving plate 4021 moves along the guide rod 7. The outer punch 4034 and inner punch 4033 at the bottom of the variable diameter punch assembly 403 contact the material and punch it into the forming groove 8. Simultaneously, the center punch rod 16 punches the center of the gasket. Then, the hydraulic cylinder 401 drives the stamping mechanism 4 to reset upwards. At this time, the cylinder 2001 is activated, controlling the discharge plate 2002 and discharge cylinder 2003 to move upwards. The discharge cylinder 2003 pushes the gasket upwards out of the forming groove 8. Combined with external airflow or a neatly tilted stamping device, the gasket can be easily discharged from the forming groove 8. The above steps are then repeated. The material processed in the above manner is as follows: Figure 9 As shown.

[0045] Example 2: This example provides a technical solution: a stamping device for a gasket for an automotive gearbox, including an upper mold assembly 1 and a lower mold assembly 2. The lower mold assembly 2 is located below the upper mold assembly 1. The upper mold assembly 1 includes an upper mold base 3 and a stamping mechanism 4. The stamping mechanism 4 is disposed at the bottom of the upper mold base 3. The lower mold assembly 2 includes a base plate 5 and a lower mold base 6. The base plate 5 is mounted on the bottom of the lower mold base 6 by a mounting rod. Guide rods 7 are installed on the edges of both the upper mold base 3 and the lower mold base 6.

[0046] In specific implementations, such as Figure 1 and Figure 2As shown, the stamping mechanism 4 includes a hydraulic cylinder 401, a pressure-relieving combination plate 402, and at least one variable diameter punch assembly 403. The hydraulic cylinder 401 is fixedly installed on the top of the upper die base 3. The pressure-relieving combination plate 402 passes through the guide rod 7 and is installed at the output end of the hydraulic cylinder 401. The variable diameter punch assemblies 403 are arranged in a row at the bottom of the pressure-relieving combination plate 402. The variable diameter punch assemblies 403 are used to produce gearbox gaskets of different diameters and automatically adjust the distance between the bottom of the variable diameter punch assembly 403 and the lower die base 6 when adjusting the punching diameter to keep the spacing between adjacent punch slots after punching the material before and after the diameter change is the same. The lower die base 6 has forming grooves 8 corresponding to the variable diameter punch assembly 403.

[0047] In specific implementations, such as Figure 2 As shown, the pressure-relieving combination plate 402 includes a movable plate 4021, a mounting plate 4022, multiple limiting rods 4023, and multiple pressure-relieving springs 4024. Guide holes 9 are provided on both sides of the movable plate 4021, and the guide rods 7 are locked in the guide holes 9. The mounting plate 4022 is located at the bottom of the movable plate 4021. Multiple positioning holes are provided on the front and rear sides of the mounting plate 4022. The top of the limiting rods 4023 passes through the positioning holes and is fixedly installed to the bottom of the movable plate 4021. The pressure-relieving springs 4024 are sleeved on the limiting rods 4023 and are located between the movable plate 4021 and the mounting plate 4022. During stamping, the hydraulic cylinder 401 pushes the pressure-relieving combination plate 402 downward, and the variable diameter punch assembly 403 at the bottom punches the material into the forming groove 8 to complete the punching. Subsequently, the movable plate 4021 and the mounting plate 4022 can squeeze the pressure-relieving springs 4024 to ensure safety.

[0048] In specific implementations, such as Figures 3-5As shown, the variable diameter punch assembly 403 includes a mounting shell 4031, a fixed cylinder 4032, an inner punch 4033, an outer punch 4034, a servo motor 4035, and a bidirectional lead screw 4036. The mounting shell 4031 is fixedly mounted on the bottom of the mounting plate 4022, the fixed cylinder 4032 is fixedly mounted on the bottom of the mounting shell 4031, and the outer punch 4034 is slidably engaged within the fixed cylinder 4032. The outer punch 4034 is a cylindrical structure with an opening at the bottom. The inner punch 4033... 3. A sliding clamp is installed inside the outer punch 4034. The servo motor 4035 is fixedly installed inside the mounting housing 4031. A bidirectional lead screw 4036 is installed at the output end of the servo motor 4035. A first screw hole 10 is opened at the top of the outer punch 4034, and a second screw hole 11 is opened at the top of the inner punch 4033. The two ends of the bidirectional lead screw 4036 are respectively engaged with the first screw hole 10 and the second screw hole 11. Based on the above embodiment, the servo motor 4035 is started. 035 can drive the bidirectional lead screw 4036 to rotate. Since the threads at both ends of the bidirectional lead screw 4036 are set in opposite directions, the inner punch 4033 can move downward and the outer punch 4034 can move upward. At this time, the inner punch 4033 is partially located outside the outer punch 4034, and the distance between the inner punch 4033 and the lower die base 6 is shortened, while the distance between the outer punch 4034 and the lower die base 6 is increased. At this time, a shim with the same diameter as the inner punch 4033 can be punched. When the material movement speed is inconvenient, the inner punch 4033 can punch the material faster, thereby ensuring that the distance of the groove cut on the material is close and that no material is wasted. The pitch of the lower thread of the bidirectional lead screw 4036 can be set to be smaller than the pitch of the upper thread, thus ensuring that the distance of the outer punch 4034 moving upward is greater than the distance of the inner punch 4033 moving downward, thereby ensuring that the outer punch 4034 can move upward as much as possible to prevent the outer punch 4034 from punching the material.

[0049] Furthermore, the inner wall of the fixed cylinder 4032 is provided with first sliding grooves 12 on both sides, the outer punch 4034 is provided with first sliders 13 on both sides, the first sliders 13 are locked in the first sliding grooves 12, the inner wall of the outer punch 4034 is provided with second sliding grooves 14 on both sides, and the inner punch 4033 is provided with second sliders 15 on both sides, the second sliders 15 are locked in the second sliding grooves 14. Therefore, it can be ensured that the outer punch 4034 can be stably set in the fixed cylinder 4032, and the inner punch 4033 can be stably set in the outer punch 4034.

[0050] In specific implementations, such as Figure 6 and Figure 7 As shown, a central punch rod 16 is fixedly installed on the base plate 5. The top of the central punch rod 16 is set in the forming groove 8. A central slot 17 is opened at the center of the bottom of the inner punch 4033. The central punch rod 16 corresponds to the central slot 17.

[0051] Furthermore, the bottom of the lower die base 6 is provided with a diameter change control component 18 for changing the diameter of the forming groove 8 according to the diameter change of the variable diameter punch assembly 403. The diameter change control component 18 includes an electric telescopic rod 1801, a control plate 1802 and multiple variable diameter cylinders 1803. The bottom of the lower die base 6 is provided with an installation groove, the electric telescopic rod 1801 is fixedly installed in the installation groove, the control plate 1802 is installed at the output end of the electric telescopic rod 1801, and multiple installation holes 19 corresponding to the forming groove 8 are provided on the control plate 1802. The variable diameter cylinders 1803 are installed at the top of the installation holes 19, the central punch rod 16 passes through the variable diameter cylinder 1803, and the diameter of the outer punch 4034 is the same as the diameter of the variable diameter cylinder 1803. At this time, the electric telescopic rod 1801 is in the retracted state, and the top of the variable diameter cylinder 1803 is flush with the top of the lower die base 6.

[0052] In the specific implementation, a discharge assembly 20 for removing the gearbox gasket from the forming groove 8 is provided above the base plate 5. The discharge assembly 20 includes a cylinder 2001, a discharge plate 2002, and multiple discharge cylinders 2003. A receiving groove is provided on the base plate 5, and the cylinder 2001 is fixedly installed in the receiving groove. Multiple fixing holes 21 corresponding to the forming groove 8 are provided on the discharge plate 2002, and the discharge cylinders 2003 are fixedly installed on the top of the fixing holes 21. The discharge cylinders 2003 are engaged in the center punch hole. Between rod 16 and reducing cylinder 1803, the diameter of discharge cylinder 2003 is the same as the diameter of inner punch 4033. The top of discharge cylinder 2003 is flush with the top of center punch rod 16. After punching, the gasket can remain in the forming groove 8. Cylinder 2001 controls discharge plate 2002 and discharge cylinder 2003 to move upward. Discharge cylinder 2003 can push the gasket upward from the forming groove 8. With the help of external airflow or the neatly tilted setting of the stamping device, the gasket can be easily discharged from the forming groove 8.

[0053] This embodiment is used to process gearbox gaskets with the same diameter as the inner punch 4033. Based on the above embodiment, the servo motor 4035 is started, which drives the bidirectional lead screw 4036 to rotate. Since the threads at both ends of the bidirectional lead screw 4036 are set in opposite directions, the inner punch 4033 can move downward and the outer punch 4034 can move upward. At this time, the inner punch 4033 is partially located outside the outer punch 4034, and the distance between the inner punch 4033 and the lower die base 6 is shortened, while the distance between the outer punch 4034 and the lower die base 6 is increased. At this time, gaskets with the same diameter as the inner punch 4033 can be punched. When the material movement speed is inconvenient, the inner punch 4033 can punch the material faster. At the same time, the electric telescopic rod 1801 is controlled to retract, and the variable diameter cylinder 1803 moves to the top of the lower die base 6. At a flush position, during processing, the metal material passes over the lower die base 6 via an external feeding structure. As it passes, the hydraulic cylinder 401 pushes the stamping mechanism 4 downwards, and the moving plate 4021 moves along the guide rod 7. The inner punch 4033 at the bottom of the variable-diameter punch assembly 403 contacts the material and punches it into the forming groove 8. Simultaneously, the center punch rod 16 punches the center of the gasket. Then, the hydraulic cylinder 401 drives the stamping mechanism 4 to reset upwards. At this time, the air cylinder 2001 is activated, controlling the discharge plate 2002 and discharge cylinder 2003 to move upwards. The discharge cylinder 2003 pushes the gasket upwards out of the forming groove 8. Combined with external airflow or a neatly tilted stamping device, this facilitates the unloading of the gasket from the forming groove 8. The above steps are then repeated. The material processed in this manner is as follows: Figure 10 As shown, the spacing between the punched slots in the material can remain unchanged from the spacing between the larger slots in Example 1, thus maintaining efficiency and high material utilization with minimal adjustment operations.

[0054] The above are merely preferred embodiments of the present invention and are illustrative in nature, not restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.

Claims

1. A stamping device for gaskets in automotive transmissions, characterized in that, It includes an upper module (1) and a lower module (2), the lower module (2) being located below the upper module (1). The upper module (1) includes an upper die base (3) and a stamping mechanism (4), the stamping mechanism (4) being located at the bottom of the upper die base (3). The lower module (2) includes a base plate (5) and a lower die base (6), the base plate (5) being mounted at the bottom of the lower die base (6) via a mounting rod. Guide rods (7) are installed on the edges of both the upper die base (3) and the lower die base (6). The stamping mechanism (4) includes a hydraulic cylinder (401), a pressure-relieving combination plate (402), and at least one variable diameter punch assembly (403). The hydraulic cylinder (401) is fixedly installed on the top of the upper die base (3). The pressure-relieving combination plate (402) passes through the guide rod (7) and is installed at the output end of the hydraulic cylinder (401). The variable diameter punch assemblies (403) are arranged in a row at the bottom of the pressure-relieving combination plate (402). The variable diameter punch assembly (403) is used to produce gearbox gaskets of different diameters and automatically adjusts the distance between the bottom of the variable diameter punch assembly (403) and the lower die base (6) when adjusting the punching diameter to keep the spacing between adjacent punch slots the same after punching the material before and after the diameter change. The lower die base (6) is provided with a forming groove (8) corresponding to the variable diameter punch assembly (403); The variable diameter punch assembly (403) includes a mounting shell (4031), a fixed cylinder (4032), an inner punch (4033), an outer punch (4034), a servo motor (4035), and a bidirectional lead screw (4036). The mounting shell (4031) is fixedly mounted on the bottom of the mounting plate (4022), and the fixed cylinder (4032) is fixedly mounted on the bottom of the mounting shell (4031). The outer punch (4034) is slidably engaged within the fixed cylinder (4032). The outer punch (4034) is a cylindrical structure with an opening at the bottom. The inner punch (4033)... 33) The sliding clamp is installed inside the outer punch (4034), the servo motor (4035) is fixedly installed inside the mounting shell (4031), the bidirectional screw (4036) is installed at the output end of the servo motor (4035), the top of the outer punch (4034) is provided with a first screw hole (10), the top of the inner punch (4033) is provided with a second screw hole (11), the two ends of the bidirectional screw (4036) are respectively engaged with the first screw hole (10) and the second screw hole (11), and the pitch of the lower thread of the bidirectional screw (4036) is smaller than the pitch of the upper thread.

2. The stamping device for a gasket for an automotive transmission as described in claim 1, characterized in that, The pressure-relieving combination plate (402) includes a movable plate (4021), a mounting plate (4022), multiple limiting rods (4023) and multiple pressure-relieving springs (4024). The movable plate (4021) has guide holes (9) on both sides of its edges. The guide rods (7) are fitted into the guide holes (9). The mounting plate (4022) is located at the bottom of the movable plate (4021). The mounting plate (4022) has multiple positioning holes on both its front and rear sides. The top of the limiting rods (4023) passes through the positioning holes and is fixedly installed to the bottom of the movable plate (4021). The pressure-relieving springs (4024) are sleeved on the limiting rods (4023) and are located between the movable plate (4021) and the mounting plate (4022).

3. The stamping device for a gasket for an automotive transmission as described in claim 2, characterized in that, The inner wall of the fixed cylinder (4032) is provided with a first sliding groove (12) on both sides. The outer punch (4034) is provided with a first slider (13) on both sides. The first slider (13) is locked in the first sliding groove (12). The inner wall of the outer punch (4034) is provided with a second sliding groove (14) on both sides. The inner punch (4033) is provided with a second slider (15) on both sides. The second slider (15) is locked in the second sliding groove (14).

4. The stamping device for a gasket for an automotive transmission as described in claim 2, characterized in that, A center punch rod (16) is fixedly installed on the base plate (5). The top of the center punch rod (16) is set in the forming groove (8). A center slot (17) is opened at the center of the bottom of the inner punch (4033). The center punch rod (16) corresponds to the center slot (17).

5. The stamping device for a gasket for an automotive transmission as described in claim 4, characterized in that, The bottom of the lower die base (6) is provided with a diameter control component (18) for changing the diameter of the forming groove (8) according to the diameter change of the variable diameter punch assembly (403).

6. The stamping device for a gasket for an automotive transmission as described in claim 5, characterized in that, The variable diameter control assembly (18) includes an electric telescopic rod (1801), a control plate (1802), and multiple variable diameter cylinders (1803). The bottom of the lower mold base (6) is provided with an installation groove. The electric telescopic rod (1801) is fixedly installed in the installation groove. The control plate (1802) is installed at the output end of the electric telescopic rod (1801). Multiple installation holes (19) corresponding to the forming groove (8) are provided on the control plate (1802). The variable diameter cylinders (1803) are installed at the top of the installation holes (19). The central punch rod (16) passes through the variable diameter cylinder (1803). The diameter of the outer punch (4034) is the same as the diameter of the variable diameter cylinder (1803).

7. The stamping device for a gasket for an automotive transmission as described in claim 6, characterized in that, A discharge assembly (20) for removing gearbox gaskets from the molding groove (8) is provided above the base plate (5).

8. The stamping device for a gasket for an automotive transmission as described in claim 7, characterized in that, The discharge assembly (20) includes a cylinder (2001), a discharge plate (2002), and multiple discharge cylinders (2003). The base plate (5) has a receiving groove, and the cylinder (2001) is fixedly installed in the receiving groove. The discharge plate (2002) has multiple fixing holes (21) corresponding to the forming groove (8). The discharge cylinder (2003) is fixedly installed on the top of the fixing hole (21). The discharge cylinder (2003) is stuck between the central punch rod (16) and the variable diameter cylinder (1803). The diameter of the discharge cylinder (2003) is the same as the diameter of the inner punch (4033).

9. A method of using a stamping device for gaskets in automotive transmissions, characterized in that, The method of use is applicable to the stamping device for automotive transmission gaskets according to any one of claims 1-8, and includes the following steps: S1. Variable diameter adjustment: The variable diameter punch assembly (403) can be used to produce two different diameter transmission shims, and can be adjusted to the required radius according to production needs; S2, Stamping operation: The metal material passes over the lower die base (6) through the external material conveying structure. When it passes, the hydraulic cylinder (401) can push the stamping mechanism (4) to move downward. The stamping mechanism (4) and the lower die (2) can stamp the metal material into a gearbox gasket.

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