A telephone line interface assembly hardware mechanism

By designing automated feeding, punching and assembly modules for the tool, the problem of inefficient assembly of the tool in the prior art is solved, and efficient automatic assembly of the tool in the telephone line interface is realized.

CN222725263UActive Publication Date: 2025-04-08E A (DONGGUAN)ELECTRIC CO LTD
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Patent Information

Application Number
CN202420826715.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-22
Publication Date
2025-04-08
Estimated Expiration
2034-04-22

AI Technical Summary

Technical Problem

In the prior art, the punching and assembly of the maker relies on manual operation during the assembly of the telephone line interface, resulting in low working efficiency.

Method used

A telephone line interface assembly tool mechanism including a metal tool feeding module, a metal tool punching and flip module, a telephone line interface feeding module and a stamping assembly module is designed, and the loading, punching, flipping and assembly of the tool is realized through an automated module.

Benefits of technology

It realizes automatic assembly of metal tools, improves assembly efficiency, and reduces the need for manual operation.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a telephone line interface hardware assembly mechanism, comprising a base, a mounting frame, a hardware feeding module, a hardware punching and flipping module, a telephone line interface feeding module and a stamping assembly module; the mounting frame is fixed at a middle position above the base; the hardware feeding module is mounted on the left part of the base, and is used to control the hardware material belt to be gradually conveyed to the right; the hardware punching and flipping module is mounted on the base and is located on the right side of the hardware feeding module, and is used to cut the hardware from the material belt and swing it forward to feed the hardware; the telephone line interface feeding module is mounted on the base and is located on the front side of the hardware punching and flipping module, and is used to receive and deliver the telephone line interface; the stamping assembly module is mounted on the mounting frame. The design can efficiently and stably assemble the hardware to the telephone line interface.
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Description

Technical Field

[0001] The utility model relates to the technical field of telephone line interface assembly equipment, in particular to a telephone line interface assembly hardware mechanism. Background Art

[0002] The telephone line interface has slots that are distributed front and back and vertically arranged. Hardware needs to be inserted into the slots. The hardware is processed by continuous stamping. After forming, the hardware is still on the coiled material strip. Therefore, the hardware needs to be punched out from the coiled material strip and then inserted into the slot of the telephone line interface. In the past, the hardware was punched out by punching equipment, and then the punched hardware was assembled manually. The overall work efficiency is low, so it needs to be improved. Utility Model Content

[0003] The utility model aims to provide a telephone line interface assembly hardware mechanism to solve the problems mentioned in the background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A telephone line interface assembly hardware mechanism, comprising a base, a mounting frame, a hardware feeding module, a hardware punching and flipping module, a telephone line interface feeding module and a stamping assembly module;

[0006] The mounting frame is fixed at a middle position above the base;

[0007] The hardware feeding module is installed on the left side of the base, and is used to control the hardware material belt to be gradually fed to the right;

[0008] The hardware punching and flipping module is installed on the base and is located on the right side of the hardware feeding module, including a mounting seat, a guide block, a lower punch, a lower punch lifting and swinging driving assembly, an upper punch and an upper punch driving device; the mounting seat is fixed on the base; the guide block is fixed on the mounting seat and docked at the right side of the hardware feeding module; the guide block is provided with a second guide groove for the hardware material belt to pass through; a vertically arranged punching groove is provided at the middle position of the guide block corresponding to the second guide groove; the upper punch and the lower punch are arranged at the position of the punching groove in an upper and lower distribution; the lower punch is provided with an adsorption hole; the lower punch lifting and swinging driving assembly is installed on the mounting seat and connected to the lower punch, for controlling the lifting and swinging of the lower punch and the swinging around the X-axis; the upper punch driving device is installed on the mounting frame and the power output end is connected to the upper punch;

[0009] The telephone line interface feeding module is installed on the base and is located in front of the hardware punching and flipping module, including an X-axis driving device, a movable seat, a Y-axis driving cylinder, a rotating cylinder and a placement seat; the X-axis driving device is installed on the base and the power output end is connected to the movable seat; the Y-axis driving cylinder is installed on the movable seat and the power output end is connected to the rotating cylinder; the placement seat is installed on the power output end of the rotating drive;

[0010] The stamping assembly module is installed on a mounting frame.

[0011] Further description of the utility model, the hardware feeding module includes a support base and a guide wheel group, a positioning gear and a pushing assembly installed on the support base from left to right; the support base is provided with a first guide groove; the guide wheel group includes an upper guide wheel bracket, an upper guide wheel and a lower guide wheel; the lower guide wheel is rotatably connected in the support base; the upper guide wheel is installed on the support base through the upper guide wheel bracket; the upper guide wheel is located above the lower guide wheel; the positioning gear is freely rotatably installed on the support base and is located above the first guide groove; the pushing assembly includes an X-direction driving cylinder, a Z-direction driving cylinder, a connecting base and a positioning column; the X-direction driving cylinder is installed on the support base and the power output end is connected to the Z-direction driving cylinder; the power output end of the Z-direction driving cylinder is connected to the connecting base; a number of positioning columns are provided and are distributed on the left and right and installed below the connecting base.

[0012] Further description of the utility model: the lower punch lifting and swinging drive assembly includes a lower punch connecting block, a lower punch lifting cylinder and a lower punch swinging drive cylinder; the lower punch connecting block can be slidably installed on the lower part of the mounting seat; the lower end of the upper punch is hinged to the lower punch connecting block; the lower punch lifting cylinder is fixed to the bottom of the mounting seat and the power output end is connected to the lower punch connecting block; the rear end of the lower punch swinging drive cylinder is movably connected to the rear part of the mounting seat through a support, and the power output end is hinged to the middle position of the rear side of the lower punch.

[0013] Further description of the utility model, the mounting frame includes four support columns, an upper mounting plate and a mounting block; the upper mounting plate is fixed above the base through four support columns; and the mounting block is fixed to the bottom of the upper mounting plate.

[0014] Further description of the utility model, the upper punch driving device includes a punching drive cylinder, a pressure arm, a pressure wheel, a tension spring and an upper punch connecting block; the left part of the pressure arm is rotatably connected to the mounting block; the pressure wheel is rotatably connected to the rear side of the middle part of the pressure arm; the upper punch connecting block is slidably connected to the upper part of the mounting seat; the front side of the upper punch connecting block is provided with a horizontally arranged slide groove that cooperates with the pressure wheel; the upper punch is fixed on the upper punch connecting block; the punching drive cylinder is fixed above the upper mounting plate and a pressure block is connected to the power output end; the pressure block touches the upper right part of the pressure arm; two tension springs are provided and are distributed front and back; the upper end of the tension spring is connected to one side of the punching drive cylinder, and the lower end is connected to the front end of the pressure arm.

[0015] Further description of the utility model, the stamping assembly module includes a stamping drive cylinder, a pressure head connecting seat, a spring, a pre-pressure block and a pressure head; the pressure head connecting seat is slidably connected to the mounting block up and down; a pre-pressure block mounting hole is provided in the pressure head connecting seat; a limit plate is provided at the bottom of the pressure head connecting seat corresponding to the pre-pressure block mounting hole; the pre-pressure block is installed in the pre-pressure block mounting hole and the lower end extends from the limit plate; the spring is installed in the pre-pressure block mounting hole and is located above the pre-pressure block; the upper end of the spring is positioned by a pin; the pressure head is fixed on one side of the pressure head connecting seat; the stamping drive cylinder is fixed on the upper mounting plate and the power output end is connected to the pressure head connecting seat.

[0016] The beneficial effects of the utility model are:

[0017] This design can automatically complete the loading, punching and flipping of hardware through the hardware feeding module and the hardware punching and flipping module, preparing for the insertion of the hardware into the telephone line interface. The telephone line interface feeding module can realize the feeding and rotation reversal of the telephone line interface, providing a basis for assembly. The stamping assembly module presses the hardware into the telephone line interface. This design can efficiently and stably assemble the hardware into the two slots of the telephone line interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall structure diagram of the utility model;

[0019] Figure 2 It is a structural diagram of the installation of the utility model;

[0020] Figure 3 This is a structural diagram of the hardware feeding module of the utility model;

[0021] Figure 4 This is a structural diagram of the hardware punching and flipping module of the utility model;

[0022] Figure 5 This is a structural diagram of the connection between the lower punch lifting and swinging driving assembly and the lower punch of the utility model;

[0023] Figure 6 It is a structural diagram of the upper punch driving device of the utility model;

[0024] Figure 7 This is a structural diagram of the telephone line interface feeding module of the utility model;

[0025] Figure 8 It is a structural diagram of the punching assembly module of the utility model. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings:

[0027] like Figure 1 As shown, a telephone line interface assembly hardware mechanism includes a base 1, a mounting frame 2, a hardware feeding module 3, a hardware punching and flipping module 4, a telephone line interface feeding module 5 and a stamping assembly module 6;

[0028] like Figure 2 As shown, the mounting frame 2 is fixed at the middle position above the base 1; the mounting frame 2 includes four support columns 21, an upper mounting plate 22 and a mounting block 23; the upper mounting plate 22 is fixed above the base 1 through four support columns 21; the mounting block 23 is fixed to the bottom of the upper mounting plate 22.

[0029] like Figure 3As shown, the hardware feeding module 3 is installed on the left part of the base 1, and is used to control the hardware material belt to be gradually transported to the right; the hardware feeding module 3 includes a support seat 31 and a guide wheel group 32, a positioning gear 33 and a pushing assembly 34 installed on the support seat 31 from left to right; a first material guide groove 311 is provided on the support seat 31; the guide wheel group 32 includes an upper guide wheel bracket 321, an upper guide wheel 322 and a lower guide wheel 323; the lower guide wheel 323 is rotatably connected in the support seat 31; the upper guide wheel 322 is installed on the support seat 31 through the upper guide wheel bracket 321; the upper guide wheel 322 is located above the lower guide wheel 323; the positioning gear 33 is freely rotatably installed on the support seat 31 and is located above the first material guide groove 311; the pushing assembly 34 includes an X-direction driving cylinder 341, a Z-direction driving cylinder 342, a Z-direction driving cylinder 343, and a Z-direction driving cylinder 344. Cylinder 342, connecting seat 343 and positioning column 344; the X-direction driving cylinder 341 is installed on the supporting seat 31 and the power output end is connected to the Z-direction driving cylinder 342; the power output end of the Z-direction driving cylinder 342 is connected to the connecting seat 343; the positioning columns 344 are arranged in a plurality and are distributed on the left and right sides and installed below the connecting seat 343. The hardware material belt is fed in from the left end of the first material guide trough 311 and sent out from the right end. The guide wheel group 32 touches the upper and lower sides of the hardware material belt. When the hardware material belt passes through the roller group, it is leveled by the guide wheel group 32. When passing through the positioning gear 33, each tooth on the positioning gear 33 positions each hole on the hardware on the material belt. The pushing assembly 34 is linked with the Z-direction driving cylinder 342 through the X-direction driving cylinder 341 to drive the positioning column 344 to insert into the hole of the hardware and pull the material belt to be gradually transported to the right.

[0030] like Figure 4As shown, the hardware punching and flipping module 4 is installed on the base 1 and is located on the right side of the hardware feeding module 3, including a mounting seat 41, a guide block 42, a lower punch 43, a lower punch lifting and swinging driving assembly 44, an upper punch 45 and an upper punch driving device 46; the mounting seat 41 is fixed on the base 1; the guide block 42 is fixed on the mounting seat 41 and docked on the right side of the hardware feeding module 3; a second guide groove 421 for the hardware material belt to pass through is provided on the guide block 42; a vertically arranged punching groove 422 is provided at the middle position of the guide block 42 corresponding to the second guide groove 421; the upper punch 45 and the lower punch 43 are arranged at the position of the punching groove 422 in an upper and lower distribution; the lower punch 43 is provided with an adsorption hole 431; the lower punch lifting and swinging driving device 46 is provided with a plurality of screwdrivers, and the screwdrivers 46 are connected to the upper punch 45. The moving component 44 is installed on the mounting seat 41 and connected to the lower punch 43, and is used to control the lifting and swinging of the lower punch 43 around the X-axis; the upper punch driving device 46 is installed on the mounting frame 2 and the power output end is connected to the upper punch 45; the hardware material strip passes through the second material guide groove 421 of the guide block 42, and at the position of the punching groove 422, the lower punch lifting and swinging driving component 44 controls the lower punch 43 to move upward, and the upper punch driving device 46 controls the upper punch 45 to punch downward, punching the hardware to the lower punch 43, and the lower punch 43 is connected to the negative pressure device, and the negative pressure is extracted through the negative pressure device, and the adsorption hole 431 adsorbs the punched hardware, and then the lower punch lifting and swinging driving component 44 controls the lower punch 43 to reset downward and swing forward 90° to prepare for the assembly of the hardware.

[0031] like Figure 5 As shown, the lower punch lifting and swinging driving assembly 44 includes a lower punch connecting block 441, a lower punch lifting cylinder 442 and a lower punch swinging driving cylinder 443; the lower punch connecting block 441 can be slidably installed at the lower part of the mounting seat 41; the lower end of the upper punch 45 is hinged to the lower punch connecting block 441; the lower punch lifting cylinder 442 is fixed to the bottom of the mounting seat 41 and the power output end is connected to the lower punch connecting block 441; the rear end of the lower punch swinging driving cylinder 443 is connected to the lower punch connecting block 441; It is movably connected to the rear part of the mounting seat 41 through the support, and the power output end is hinged to the middle position of the rear side of the lower punch 43. When the lower punch lifting cylinder 442 drives the lower punch connecting block 441 to move upward, the lower punch swing driving cylinder 443 swings around the rear end. After the lower punch lifting cylinder 442 controls the lower punch 43 to reset downward, the lower punch swing driving cylinder 443 is pushed out to control the lower punch 43 to swing forward around the lower end hinge. This structure can realize the up and down movement and front and back swinging action of the lower punch 43.

[0032] like Figure 6As shown, the upper punch driving device 46 includes a punching driving cylinder 461, a pressure arm 462, a pressure wheel 463, a tension spring 464 and an upper punch connecting block 465; the left part of the pressure arm 462 is rotatably connected to the mounting block 23; the pressure wheel 463 is rotatably connected to the rear side of the middle part of the pressure arm 462; the upper punch connecting block 465 is slidably connected to the upper part of the mounting seat 41; the front side of the upper punch connecting block 465 is provided with a horizontally arranged slide groove 4651 that cooperates with the pressure wheel 463; the upper punch 45 is fixed on the upper punch connecting block 465; the punching driving cylinder 461 is fixed above the upper mounting plate 22 and a pressure block is connected to the power output end; the pressure The block touches the upper right part of the pressure arm 462; two tension springs 464 are arranged and distributed front to back; the upper end of the tension spring 464 is connected to one side of the punching drive cylinder 461, and the lower end is connected to the front end of the pressure arm 462, the punching drive cylinder 461 drives the pressure block to move downward, the pressure block touches the right part of the pressure arm 462 and moves downward, the pressure arm 462 rotates around the left end, so that the pressure wheel 463 slides in the slide groove 4651 and drives the upper punch connecting block 465 to move downward, the upper punch 45 connected to the upper punch connecting block 465 moves downward electrically, and after the punching drive cylinder 461 is reset, the tension spring 464 pulls the right end of the pressure arm 462 to drive the pressure arm 462 to reset.

[0033] like Figure 7 As shown, the telephone line interface feeding module 5 is installed on the base 1 and is located in front of the hardware punching and flipping module 4, including an X-axis driving device 51, a movable seat 52, a Y-direction driving cylinder 53, a rotating cylinder 54 and a placement seat 55; the X-axis driving device 51 is installed on the base 1 and the power output end is connected to the movable seat 52; the Y-direction driving cylinder 53 is installed on the movable seat 52 and the power output end is connected to the rotating cylinder 54; the placement seat 55 is installed at the power output end of the rotating drive; the X-axis The driving device 51 controls the movable seat 52 to move left and right. After moving to the right, it is convenient to take and place the telephone line interface workpiece. After moving to the left, it is located at the assembly station. The Y-axis driving cylinder 53 controls the placement seat 55 to move forward and backward. The placement seat 55 is controlled to move forward to avoid interference between the telephone line interface and the hardware when the lower punch 43 swings forward. The placement seat 55 is controlled to move backward to be located at the assembly station, waiting for the hardware to be pressed in. The rotating cylinder 54 controls the placement seat 55 to rotate 180° and reverse, thereby realizing the hardware assembly of the two slots.

[0034] like Figure 8As shown, the stamping assembly module 6 is installed on the mounting frame 2; the stamping assembly module 6 includes a stamping drive cylinder 61, a pressure head connecting seat 62, a spring (not shown), a pre-pressing block 63 and a pressure head 64; the pressure head connecting seat 62 is slidably connected to the mounting block 23 up and down; a pre-pressing block mounting hole is provided in the pressure head connecting seat 62; a limit plate 621 is provided at the bottom of the pressure head connecting seat 62 corresponding to the pre-pressing block mounting hole; the pre-pressing block 63 is installed in the pre-pressing block mounting hole and the lower end extends from the limit plate 621; the spring is installed in the pre-pressing block The pressing head 64 is fixed on one side of the pressing head connecting seat 62; the stamping drive cylinder 61 is fixed on the upper mounting plate 22 and the power output end is connected to the pressing head connecting seat 62. The stamping drive cylinder 61 controls the pressing head connecting seat 62 to move downward. The pre-stressing block 63 first contacts the telephone line interface to pre-stress the telephone line interface. The pressing head connecting seat 62 continues to move downward. The pressing head 64 contacts the hardware to press the hardware into the slot of the telephone line interface to complete the assembly of a hardware.

[0035] The working principle of this embodiment:

[0036] The hardware feeding module 3 controls the hardware material belt to be gradually transported to the right. When it is sent to the position of the hardware punching module, at the position of the punching groove 422, the lower punch lifting and swinging driving assembly 44 controls the lower punch 43 to move upward, and the upper punch driving device 46 controls the upper punch 45 to punch downward, punching the hardware to the position of the lower punch 43. The lower punch 43 absorbs the punched hardware through the adsorption hole 431, and then the lower punch lifting and swinging driving assembly 44 controls the lower punch 43 to reset downward and swing forward 90° to prepare for the assembly of the hardware. At the same time, the telephone line interface feeding module 5 receives the telephone line interface and transports it to the left. Before the lower punch 43 swings forward, the Y-axis driving cylinder 53 controls the placement seat 55 to move forward. After the lower punch 43 swings forward, the Y-line driving cylinder controls the placement seat 55 to move backward. At this time, the hardware is docked on the telephone line Just above one of the slots of the interface, the stamping drive cylinder 61 controls the pressure head connecting seat 62 to move downward, and the pre-pressing block 63 first contacts the telephone line interface to pre-press the telephone line interface. The pressure head connecting seat 62 continues to move downward, and the pressure head 64 touches the hardware to press the hardware into the slot of the telephone line interface to complete the assembly of a hardware. After the lower punch 43 is reset, the next hardware is connected. The rotating cylinder 54 controls the placement seat 55 to rotate 180°, and the Y-axis drive cylinder 53 controls the placement seat 55 to move forward. After the lower punch 43 receives the hardware, it swings forward again. The Y-axis drive cylinder 53 controls the placement seat 55 to move backward, and the stamping assembly module 6 works again to press the hardware into the telephone line interface to complete the assembly of a product. The X-axis drive device 51 controls the placement seat 55 to be transported to the right for material picking and placing operations to prepare for the next round of processing.

[0037] The above description does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A telephone line interface assembly hardware mechanism, characterized in that: It includes a base, a mounting frame, a hardware feeding module, a hardware punching and flipping module, a telephone line interface feeding module and a stamping assembly module; The mounting frame is fixed at a middle position above the base; The hardware feeding module is installed on the left side of the base, and is used to control the hardware material belt to be gradually fed to the right; The hardware punching and flipping module is installed on the base and is located on the right side of the hardware feeding module, including a mounting seat, a guide block, a lower punch, a lower punch lifting and swinging driving assembly, an upper punch and an upper punch driving device; the mounting seat is fixed on the base; the guide block is fixed on the mounting seat and docked on the right side of the hardware feeding module; the guide block is provided with a second guide groove for the hardware material belt to pass through; a vertically arranged punching groove is provided at the middle position of the guide block corresponding to the second guide groove; the upper punch and the lower punch are distributed up and down and arranged at the position of the punching groove; the lower punch is provided with an adsorption hole; the lower punch lifts and swings The driving assembly is installed on the mounting seat and connected to the lower punch, and is used to control the lifting and swinging of the lower punch around the X-axis; the upper punch driving device is installed on the mounting frame and the power output end is connected to the upper punch; the telephone line interface feeding module is installed on the base and is located in front of the hardware punching and flipping module, including an X-axis driving device, a movable seat, a Y-axis driving cylinder, a rotating cylinder and a placement seat; the X-axis driving device is installed on the base and the power output end is connected to the movable seat; the Y-axis driving cylinder is installed on the movable seat and the power output end is connected to the rotating cylinder; the placement seat is installed on the power output end of the rotating drive; The stamping assembly module is installed on a mounting frame.

2. A telephone line interface assembly hardware mechanism according to claim 1, characterized in that: The hardware feeding module includes a support seat and a guide wheel group, a positioning gear and a pushing assembly installed on the support seat from left to right; a first material guide groove is provided on the support seat; the guide wheel group includes an upper guide wheel bracket, an upper guide wheel and a lower guide wheel; the lower guide wheel is rotatably connected in the support seat; the upper guide wheel is installed on the support seat through the upper guide wheel bracket; the upper guide wheel is located above the lower guide wheel; the positioning gear is freely rotatably installed on the support seat and is located above the first material guide groove; the pushing assembly includes an X-direction driving cylinder, a Z-direction driving cylinder, a connecting seat and a positioning column; the X-direction driving cylinder is installed on the support seat and the power output end is connected to the Z-direction driving cylinder; the power output end of the Z-direction driving cylinder is connected to the connecting seat; a number of positioning columns are arranged and are distributed on the left and right and installed below the connecting seat.

3. A telephone line interface assembly hardware mechanism according to claim 1, characterized in that: The lower punch lifting and swinging driving assembly includes a lower punch connecting block, a lower punch lifting cylinder and a lower punch swinging driving cylinder; the lower punch connecting block can be slidably installed at the lower part of the mounting seat; the lower end of the upper punch is hinged to the lower punch connecting block; the lower punch lifting cylinder is fixed to the bottom of the mounting seat and the power output end is connected to the lower punch connecting block; the rear end of the lower punch swinging driving cylinder is movably connected to the rear part of the mounting seat through a support, and the power output end is hinged to the middle position of the rear side of the lower punch.

4. A telephone line interface assembly hardware mechanism according to claim 1, characterized in that: The mounting frame comprises four supporting columns, an upper mounting plate and a mounting block; the upper mounting plate is fixed above the base through the four supporting columns; and the mounting block is fixed to the bottom of the upper mounting plate.

5. A telephone line interface assembly hardware mechanism according to claim 4, characterized in that: The upper punch driving device comprises a punching driving cylinder, a pressure arm, a pressure wheel, a tension spring and an upper punch connecting block; the left part of the pressure arm is rotatably connected to the mounting block; the pressure wheel is rotatably connected to the rear side of the middle part of the pressure arm; the upper punch connecting block is slidably connected to the upper part of the mounting seat; the front side of the upper punch connecting block is provided with a horizontally arranged slide groove that cooperates with the pressure wheel; the upper punch is fixed on the upper punch connecting block; the punching driving cylinder is fixed above the upper mounting plate and a pressure block is connected to the power output end; the pressure block touches the upper part of the right part of the pressure arm; two tension springs are provided and are distributed front and back; the upper end of the tension spring is connected to one side of the punching driving cylinder, and the lower end is connected to the front end of the pressure arm.

6. A telephone line interface assembly hardware mechanism according to claim 4, characterized in that: The stamping assembly module includes a stamping drive cylinder, a pressure head connecting seat, a spring, a pre-pressing block and a pressure head; the pressure head connecting seat is slidably connected to the mounting block up and down; a pre-pressing block mounting hole is provided in the pressure head connecting seat; a limit plate is provided at the bottom of the pressure head connecting seat corresponding to the pre-pressing block mounting hole; the pre-pressing block is installed in the pre-pressing block mounting hole and the lower end extends out of the limit plate; the spring is installed in the pre-pressing block mounting hole and is located above the pre-pressing block; the upper end of the spring is positioned by a pin; the pressure head is fixed on one side of the pressure head connecting seat; the stamping drive cylinder is fixed on the upper mounting plate and the power output end is connected to the pressure head connecting seat.