Stamping equipment for hardware manufacturing

By designing hardware stamping equipment that automatically loads and unloads, the problems of cumbersome and low efficiency of workers in the existing technology are solved, and the automatic synchronization of hardware stamping processing is achieved, which improves safety and efficiency.

CN119500858APending Publication Date: 2025-02-25FOSHAN NANHAI XIANWEI HARDWARE PLASTIC CO LTD
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Patent Information

Application Number
CN202411655987.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-19
Publication Date
2025-02-25

AI Technical Summary

Technical Problem

In the existing hardware stamping processing, workers have many operating procedures around the stamping equipment, stay for a long time, and have a high labor intensity, which increases the risk of human operation errors and reduces operating efficiency.

Method used

A stamping equipment for hardware manufacturing is designed, which uses synchronous operation of loading and unloading materials and automatically loading and unloading mechanisms to enable the hardware blank to be automatically pushed into the stamping and depressing mold, and after the stamping is completed, it will automatically push into the next set of hardware blanks. Prepare for the next stamping and replace the worker with loading and unloading.

Benefits of technology

Through automated loading and unloading, labor costs are reduced, the safety and efficiency of hardware stamping processing are improved, and the risk of human operation errors is reduced.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of hardware manufacturing, in particular to stamping equipment for hardware manufacturing, which comprises a stamping machine, an upper stamping die is arranged in the stamping machine, a lower stamping die is arranged at the bottom of the upper stamping die, an L-shaped guide table is arranged at the feeding end of the lower stamping die, and an inclined blanking table is arranged at the discharging end of the lower stamping die. A feeding and discharging linkage assembly is installed on the L-shaped material guiding table. By means of a mechanism composed of a punching machine, an L-shaped material guiding table, an inclined discharging table and a feeding and discharging linkage assembly, a set of punching equipment which conducts feeding and discharging synchronous linkage operation and achieves automatic feeding and discharging is provided for hardware manufacturing, a hardware blank can be automatically pushed to the position above a punching lower die, and after punching is completed and a punching upper die ascends again, the hardware blank can be automatically pushed to the position above the punching lower die. The hardware blank is automatically pushed in, preparation is made for next stamping, manual feeding and discharging are replaced, the labor cost is reduced, meanwhile, the hardware stamping machining safety is improved, and the hardware stamping machining efficiency is improved.
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Description

Technical Field

[0001] The invention relates to the technical field of hardware manufacturing, and in particular to a stamping device for hardware manufacturing. Background Art

[0002] Stamping equipment plays a vital role in hardware processing. It places metal materials between upper and lower stamping dies and uses high pressure impact to make them plastically deform or open holes, thereby manufacturing hardware stamping parts of various shapes and sizes. These stamping parts are widely used in many industries such as automobiles, home appliances, electronics, and construction, such as body structural parts, home appliance shells, door and window accessories, etc., providing important support for industrial production;

[0003] During the existing metal stamping processing, workers have to perform many operating procedures around the stamping equipment, and the workers' stay time is long, and the labor intensity of the workers is high, which increases the risk of human operating errors and low manual operation efficiency. Therefore, a stamping equipment for hardware manufacturing is proposed. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a stamping equipment for hardware manufacturing, which is convenient for providing a set of stamping equipment for hardware manufacturing with synchronous and linked operation of loading and unloading, and automatic loading and unloading, so that the hardware blanks can be automatically pushed into the top of the stamping lower die, and after the stamping is completed and the stamping upper die is rising, the metal blanks can be automatically pushed in to prepare for the next stamping, replacing the workers' loading and unloading, reducing labor costs, and at the same time improving the safety of hardware stamping processing and improving the efficiency of hardware stamping processing.

[0005] The technical solution adopted by the present invention to solve the technical problem is a stamping device for hardware manufacturing, including a stamping machine, wherein a stamping upper die is arranged in the stamping machine, a stamping lower die is arranged at the bottom of the stamping upper die, an L-shaped material guide table is arranged at the feeding end of the stamping lower die, and an inclined material discharge table is arranged at the discharging end of the stamping lower die;

[0006] The L-shaped material guiding platform is provided with a material loading and unloading linkage assembly.

[0007] By adopting the above technical scheme, through the mechanism composed of a stamping machine, an L-shaped material guide table, an inclined material discharge table and a loading and unloading linkage component, a set of stamping equipment with synchronous loading and unloading and automatic loading and unloading is provided for hardware manufacturing, so that the hardware blanks can be automatically pushed into the top of the stamping lower die, and after the stamping is completed and the stamping upper die is rising, the hardware blanks can be automatically pushed in to prepare for the next stamping, replacing the workers' loading and unloading, reducing labor costs, and at the same time improving the safety of hardware stamping processing and improving the efficiency of hardware stamping processing.

[0008] Specifically, the loading and unloading linkage assembly includes a U-shaped frame, which is located at the inner bottom of the L-shaped material guide table. A support rod is installed on the top of the U-shaped frame. Both ends of the support rod are rotatably connected with wedge-shaped blocks through bearings. Both ends of the support rod are respectively sleeved with torsion springs, and both ends of the torsion spring are respectively fixedly connected to the corresponding wedge-shaped blocks and the support rod.

[0009] By adopting the above technical solution, the loading and unloading movements of the metal stamping processing are linked through the loading and unloading linkage components to ensure the synchronization between loading and unloading, improve the coordination between the loading and unloading operations, and solve the problem of low efficiency of the overall metal stamping process caused by the asynchrony in the existing manual loading and unloading process.

[0010] Specifically, moving grooves for the sliding of wedge-shaped blocks are provided on both sides of the L-shaped material guide platform, the top of the wedge-shaped block passes through the top of the moving groove, and stoppers for preventing the wedge-shaped block from tilting backward are respectively provided at the top corners of the U-shaped frame.

[0011] By adopting the above technical solution, the L-shaped material guide table is used as the front preparation point of the feed end of the stamping lower die, so that the fed hardware blanks can be prepared for loading in an orderly manner at the feed end of the stamping lower die.

[0012] Specifically, one end of the U-shaped frame is connected to a guide rod, one end of the guide rod passes through the L-shaped material guide platform and is sleeved with a thrust spring, and both ends of the thrust spring are respectively connected to the L-shaped material guide platform and the guide rod.

[0013] By adopting the above technical solution, the guide rod on the U-shaped frame is used to guide the moving direction of the overall loading and unloading linkage assembly, and provide support for the U-shaped frame to work under the L-shaped material guide table.

[0014] Specifically, an inclined material box is arranged on the inclined material unloading platform, and fin blocks for guiding are arranged on both sides of one end of the bottom of the inclined material box, and one end of the U-shaped frame away from the wedge-shaped shifting block is connected to the fin block through a tension spring.

[0015] By adopting the above technical solution, the inclined unloading table is used as a material guide platform for the unloading end of the stamping lower die, so that the hardware workpiece after stamping can be discharged from the stamping lower die and dropped into the unloading area based on the guidance of the inclined unloading table.

[0016] Specifically, slide grooves for sliding of the fin blocks are provided on both sides of the inclined material unloading platform, an electric push rod is installed at one end of the inclined material unloading platform away from the stamping lower die, the output end of the electric push rod is connected to the inclined material box, a material unloading port is provided at the bottom of one end of the inclined material box, and a material unloading port corresponding to the material unloading port is provided at one end of the inclined material box away from the fin blocks;

[0017] A connecting rod is arranged between the fin block and the U-shaped frame, and two ends of the connecting rod are rotatably connected with the fin block and the U-shaped frame through a rotating shaft.

[0018] By adopting the above technical solution, the electric push rod provides push-pull force to the inclined material box, so that after the inclined material box slides to the tail end of the inclined unloading table, it can return to the unloading end of the stamping lower die based on the push of the electric push rod.

[0019] Specifically, the bottom of the inclined material box and the bottom of the L-shaped material guide platform are at the same height as the top of the stamping lower die;

[0020] A conveyor is provided on one side of the punching machine, and the output end of the conveyor is at the same height as the feed end of the L-shaped material guide table.

[0021] By adopting the above technical solution, the conveyor conveys the hardware blanks that need to be stamped to the L-shaped material guide table.

[0022] Specifically, the punching machine includes a frame, a shaft is rotatably mounted on the top of the frame through a bearing, an eccentric sleeve is arranged on the shaft through a key sleeve, a clamp is arranged on the outer periphery of the eccentric sleeve through a bearing sleeve, an upper die seat is rotatably connected to the bottom of the clamp through a rotating shaft, the stamping lower die is mounted on the bottom of the upper die seat, and both ends of the upper die seat are slidably connected to the frame through a slider and a slide rail;

[0023] A motor is installed on the top of the frame, and an upper pulley and a lower pulley are respectively installed on the driving end of the motor and the rotating shaft of the shaft rod, and the upper pulley and the lower pulley are connected by a belt sleeve.

[0024] By adopting the above technical solution, the punching machine provides punching pressure for the punching upper die, so that the punching upper die can punch and open holes in the metal blank entering the punching lower die.

[0025] The beneficial effects of the present invention are as follows: through a mechanism consisting of a stamping machine, an L-shaped material guide table, an inclined material discharge table and a loading and unloading linkage component, a set of stamping equipment with synchronous and linked operation of loading and unloading and automatic loading and unloading is provided for hardware manufacturing, so that the hardware blanks can be automatically pushed into the top of the stamping lower die, and after the stamping is completed and during the recovery of the stamping upper die, the hardware blanks can be automatically pushed in to prepare for the next stamping, replacing the loading and unloading of workers, reducing labor costs, and at the same time improving the safety of hardware stamping processing, as well as improving the efficiency of hardware stamping processing, solving the problems that during the existing hardware stamping processing, workers have many operating procedures around the stamping equipment, long retention time, high labor intensity of workers, resulting in increased risk of human operating errors, and low manual operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 It is a schematic diagram of the material loading position of the present invention;

[0028] Figure 2 It is a schematic diagram of the material discharge position of the present invention;

[0029] Figure 3 It is a schematic diagram of a punching machine of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the loading and unloading linkage assembly of the present invention;

[0031] Figure 5 For the present invention Figure 1 The enlarged schematic diagram at A in the middle;

[0032] Figure 6 For the present invention Figure 2 The enlarged schematic diagram of point B in the middle;

[0033] Figure 7 For the present invention Figure 4 The enlarged schematic diagram at C in the middle;

[0034] In the figure: punching machine 1, frame 101, shaft 102, eccentric sleeve 103, clamp 104, upper die seat 105, motor 106, upper pulley 107, lower pulley 108, stamping upper die 11, stamping lower die 12, L-shaped material guide table 2, moving trough 21, conveyor 3, inclined unloading table 4, slide 41, unloading port 42, electric push rod 43, upper and lower material linkage assembly 5, U-shaped frame 51, support rod 52, wedge-shaped shift block 53, torsion spring 54, stop block 55, guide rod 56, thrust spring 57, inclined material box 58, fin block 581, unloading port 59, connecting rod 510. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0036] In order to improve the efficiency of metal stamping processing, as an embodiment of the present invention, Figures 1 to 7 As shown, a punching equipment for hardware manufacturing according to the present invention comprises a punching machine 1, wherein a punching upper die 11 is arranged in the punching machine 1, a punching lower die 12 is arranged at the bottom of the punching upper die 11, an L-shaped material guide table 2 is arranged at the feeding end of the punching lower die 12, and an inclined material discharge table 4 is arranged at the discharging end of the punching lower die 12;

[0037] The L-shaped material guiding platform 2 is provided with a material loading and unloading linkage assembly 5 .

[0038] When in use, the punching machine 1, the L-shaped material guide table 2, the inclined material discharge table 4 and the upper and lower material linkage assembly 5 provide a set of stamping equipment for hardware manufacturing that can load and discharge materials synchronously and automatically, so that the hardware blanks can be automatically pushed into the top of the stamping lower die 12, and can be automatically pushed in after the stamping is completed and during the recovery of the stamping upper die 11 to prepare for the next stamping, replacing the workers' loading and unloading, reducing labor costs, and at the same time improving the safety of hardware stamping processing and improving the efficiency of hardware stamping processing.

[0039] In order to improve the coordination between loading and unloading operations, for example, Figure 1-7 As shown, the present invention also includes that the upper and lower material linkage assembly 5 includes a U-shaped frame 51, and the U-shaped frame 51 is located at the inner bottom of the L-shaped material guiding platform 2. A support rod 52 is installed on the top of the U-shaped frame 51, and the two ends of the support rod 52 are respectively rotatably connected with a wedge-shaped shift block 53 through bearings, and the two ends of the support rod 52 are respectively sleeved with a torsion spring 54, and the two ends of the torsion spring 54 are respectively fixedly connected to the corresponding wedge-shaped shift block 53 and the support rod 52.

[0040] When in use, the loading and unloading linkage component 5 is used to realize the linkage of the loading and unloading movements of the metal stamping processing to ensure the synchronization between loading and unloading, so as to improve the coordination between the loading and unloading operations and solve the problem of low efficiency of the overall metal stamping process caused by the asynchrony in the existing manual loading and unloading process.

[0041] like Figure 1-7 As shown, the present invention also includes that movable grooves 21 for the sliding of the wedge-shaped shift block 53 are opened on both sides of the L-shaped material guide platform 2, the top of the wedge-shaped shift block 53 passes through the top of the movable groove 21, and the top corners of the U-shaped frame 51 are respectively provided with stoppers 55 for preventing the wedge-shaped shift block 53 from leaning back.

[0042] When in use, the L-shaped material guide table 2 is used as a front material preparation point of the feed end of the stamping lower die 12, so that the fed hardware blanks can be prepared for loading in an orderly manner at the feed end of the stamping lower die 12.

[0043] like Figure 1-7 As shown, the present invention also includes that one end of the U-shaped frame 51 is connected to a guide rod 56, one end of the guide rod 56 passes through the L-shaped material guide platform 2, and is sleeved with a thrust spring 57, and the two ends of the thrust spring 57 are respectively connected to the L-shaped material guide platform 2 and the guide rod 56.

[0044] When in use, the guide rod 56 on the U-shaped frame 51 is used to guide the moving direction of the entire loading and unloading linkage assembly 5 and provide support for the U-shaped frame 51 to work below the L-shaped material guiding platform 2.

[0045] The present invention also includes that an inclined material box 58 is provided on the inclined material unloading platform 4, and fins 581 for guiding are provided on both sides of one end of the bottom of the inclined material box 58, and the end of the U-shaped frame 51 away from the wedge-shaped shifting block 53 is connected to the fins 581 through a tension spring.

[0046] When in use, the inclined unloading table 4 is used as a guide platform for the unloading end of the stamping lower die 12, so that the stamped hardware workpiece can be discharged from the stamping lower die 12 and fall into the unloading area based on the guidance of the inclined unloading table 4.

[0047] The present invention also includes that the two sides of the inclined material unloading platform 4 are provided with slide grooves 41 for the sliding of the fin block 581, the end of the inclined material unloading platform 4 away from the stamping lower die 12 is installed with an electric push rod 43, the output end of the electric push rod 43 is connected to the inclined material box 58, the bottom of one end of the inclined material box 58 is provided with a material drop opening 42, and the end of the inclined material box 58 away from the fin block 581 is provided with a material drop opening 59 corresponding to the material drop opening 42;

[0048] A connecting rod 510 is disposed between the fin block 581 and the U-shaped frame 51 , and two ends of the connecting rod 510 are rotatably connected to the fin block 581 and the U-shaped frame 51 through a rotating shaft.

[0049] When in use, the electric push rod 43 provides a push-pull force to the inclined material box 58 , so that after the inclined material box 58 slides to the tail end of the inclined unloading platform 4 , it can return to the unloading end of the stamping lower die 12 based on the push of the electric push rod 43 .

[0050] like Figure 1-7 As shown, the present invention also includes that the inner bottom of the inclined material box 58 and the inner bottom of the L-shaped material guide table 2 are at the same height as the top of the stamping lower die 12;

[0051] A conveyor 3 is provided on one side of the punching machine 1 , and the output end of the conveyor 3 is at the same height as the feed end of the L-shaped material guide table 2 .

[0052] When in use, the conveyor 3 is used to convey the metal blanks that need to be punched to the L-shaped material guide table 2 .

[0053] The present invention also includes that the punching machine 1 includes a frame 101, a shaft 102 is rotatably mounted on the top of the frame 101 through a bearing, an eccentric sleeve 103 is provided on the shaft 102 through a key sleeve, a clamp 104 is provided on the outer periphery of the eccentric sleeve 103 through a bearing sleeve, an upper die seat 105 is rotatably connected to the bottom of the clamp 104 through a rotating shaft, the stamping lower die 12 is mounted on the bottom of the upper die seat 105, and both ends of the upper die seat 105 are slidably connected to the frame 101 through sliders and slide rails;

[0054] A motor 106 is installed on the top of the frame 101, and an upper pulley 107 and a lower pulley 108 are respectively installed on the driving end of the motor 106 and the rotating shaft of the shaft rod 102, and the upper pulley 107 and the lower pulley 108 are connected by a belt sleeve.

[0055] When in use, the punching machine 1 is used to provide punching force to the punching upper die 11, so that the punching upper die 11 can punch and open holes in the metal blank entering the punching lower die 12;

[0056] The motor 106 drives the upper pulley 107 to drive the lower pulley 108 to rotate, so that the lower pulley 108 drives the shaft 102 to rotate, and the eccentric sleeve 103 on the shaft 102 drives the upper die seat 105 at the bottom of the clamp 104 to move up and down continuously, so that the stamping upper die 11 on the upper die seat 105 can continuously perform stamping operations on the hardware blanks entering the stamping lower die 12.

[0057] When the present invention is in use, the conveyor 3 continuously conveys the metal blanks to be stamped onto the L-shaped material guide table 2. After the metal blanks reach the corner of the L-shaped material guide table 2, the metal blanks are blocked and stop moving. During this period, the electric push rod 43 cooperates with the stamping rhythm of the punching machine 1 to pull the inclined material box 58. At this time, the fin block 581 at the bottom of the inclined material box 58 is connected to the U-shaped frame 51 based on the connection between the connecting rod 510 and the U-shaped frame 51, so that the U-shaped frame 51 moves toward the stamping lower die 12 based on the movement of the inclined material box 58, and the U-shaped frame 51 is The wedge-shaped shifting block 53 pushes the metal blanks stranded at the corner of the L-shaped material guide platform 2 onto the L-shaped material guide platform 2. At this time, the next group of metal blanks are pushed by the conveyor 3 to fill the vacancy at the corner of the L-shaped material guide platform 2, so that the metal blanks on the L-shaped material guide platform 2 enter the stamping lower die 12. After the metal blanks arrive at the stamping lower die 12, the electric push rod 43 pushes the inclined material box 58, so that the U-shaped frame 51 and the wedge-shaped shifting block 53 thereon return successively. During the return process of the wedge-shaped shifting block 53, it passes through the L-shaped guide When a new metal blank enters the corner of the material table 2, the wedge-shaped shifting block 53 is subjected to the resistance of the metal blank and the rotation connection with the support rod 52, and lies forward until it reaches the starting section of the moving groove 21. After losing the resistance of the metal blank, based on the rotation of the torsion spring 54, it is ready for the next push of the metal blank. The punching upper die 11 of the punching machine 1 punches a hole in the metal blank on the punching lower die 12. After the hole is punched, the waste material of the hole is discharged from the membrane hole of the punching lower die 12. During the process of the upper die 11 rising, the electric push rod 43 pulls back the inclined material box 58 again, so that the U-shaped frame 51 and the wedge-shaped shifting block 53 push the new hardware blank onto the stamping lower die 12 again. At the same time, the newly entered hardware blank pushes the stamped hardware from the stamping lower die 12 into the inclined material box 58, and is sent to the blanking port 42 as the inclined material box 58 moves, and is discharged through the blanking port 59 and the blanking port 42 in turn. This cycle is used to provide a set of automatic and synchronous loading and unloading for hardware manufacturing, and a stamping operation with high operation efficiency and good operation safety is realized.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A stamping equipment for hardware manufacturing, characterized in that: The invention comprises a punching machine (1), wherein a punching upper die (11) is arranged inside the punching machine (1), a punching lower die (12) is arranged at the bottom of the punching upper die (11), an L-shaped material guide platform (2) is arranged at the feeding end of the punching lower die (12), and an inclined material discharge platform (4) is arranged at the discharging end of the punching lower die (12); The L-shaped material guiding platform (2) is provided with a material loading and unloading linkage assembly (5).

2. A stamping equipment for hardware manufacturing according to claim 1, characterized in that: The upper and lower material linkage assembly (5) comprises a U-shaped frame (51), the U-shaped frame (51) is located at the inner bottom of the L-shaped material guide platform (2), a support rod (52) is installed on the top of the U-shaped frame (51), both ends of the support rod (52) are rotatably connected with a wedge-shaped shifting block (53) through bearings, and both ends of the support rod (52) are respectively sleeved with a torsion spring (54), and both ends of the torsion spring (54) are respectively fixedly connected to the corresponding wedge-shaped shifting block (53) and the support rod (52).

3. A stamping equipment for hardware manufacturing according to claim 2, characterized in that: The L-shaped material guide platform (2) has two sides penetrated therein movable grooves (21) for the wedge-shaped shifting block (53) to slide, the top of the wedge-shaped shifting block (53) penetrates the top of the movable groove (21), and the top corners of the U-shaped frame (51) are respectively provided with stoppers (55) for preventing the wedge-shaped shifting block (53) from tilting backward.

4. A stamping equipment for hardware manufacturing according to claim 3, characterized in that: One end of the U-shaped frame (51) is connected to a guide rod (56), one end of the guide rod (56) passes through the L-shaped material guide platform (2) and is sleeved with a thrust spring (57), and two ends of the thrust spring (57) are respectively connected to the L-shaped material guide platform (2) and the guide rod (56).

5. A stamping equipment for hardware manufacturing according to claim 4, characterized in that: The inclined material box (58) is arranged on the inclined material unloading platform (4), and fin blocks (581) for guiding are arranged on both sides of one end of the bottom of the inclined material box (58), and one end of the U-shaped frame (51) away from the wedge-shaped shifting block (53) is connected to the fin block (581) via a tension spring.

6. A stamping equipment for hardware manufacturing according to claim 5, characterized in that: Slide grooves (41) for sliding the fin block (581) are provided on both sides of the inclined material unloading platform (4); an electric push rod (43) is installed at one end of the inclined material unloading platform (4) away from the stamping lower die (12); the output end of the electric push rod (43) is connected to the inclined material box (58); a material unloading port (42) is provided at the bottom of one end of the inclined material box (58); and a material unloading port (59) corresponding to the material unloading port (42) is provided at one end of the inclined material box (58) away from the fin block (581); A connecting rod (510) is provided between the fin block (581) and the U-shaped frame (51), and two ends of the connecting rod (510) are rotatably connected to the fin block (581) and the U-shaped frame (51) via a rotating shaft.

7. A stamping equipment for hardware manufacturing according to claim 6, characterized in that: The inner bottom of the inclined material box (58) and the inner bottom of the L-shaped material guide platform (2) are at the same height as the top of the stamping lower die (12); A conveyor (3) is provided on one side of the punching machine (1), and the output end of the conveyor (3) is at the same height as the feed end of the L-shaped material guide platform (2).

8. A stamping equipment for hardware manufacturing according to claim 7, characterized in that: The punching machine (1) comprises a frame (101), a shaft (102) is rotatably mounted on the top of the frame (101) via a bearing, an eccentric sleeve (103) is mounted on the shaft (102) via a key sleeve, a clamp (104) is mounted on the outer periphery of the eccentric sleeve (103) via a bearing sleeve, an upper die seat (105) is rotatably connected to the bottom of the clamp (104) via a rotating shaft, the punching lower die (12) is mounted on the bottom of the upper die seat (105), and both ends of the upper die seat (105) are slidably connected to the frame (101) via a slider and a slide rail; A motor (106) is installed on the top of the frame (101), and an upper pulley (107) and a lower pulley (108) are respectively installed on the driving end of the motor (106) and the rotating shaft of the shaft rod (102), and the upper pulley (107) and the lower pulley (108) are connected by a belt sleeve.