A punching tool for sheet metal products

Abstract

The present invention is designed in the field of metal processing technology, and discloses a punching tool for sheet hardware products, including a clamping base, a positioning frame, a buffer base and multiple clamping mechanisms, a rectangular groove is opened inside the clamping base, and the position of the rectangular groove corresponds to the positioning frame, a plurality of welding plates are fixedly connected to the inner wall of the positioning frame, and the welding plates are evenly arranged inside the clamping base, the clamping mechanism includes a rotating tube and a transmission rod, a docking plate is installed inside the clamping base, the docking plate is clamped at the bottom of the rectangular groove, and a collecting ring is installed on the top of the docking plate; compared with the prior art, when the reset pad is squeezed by the drill bit, the reset pad can be deformed together with the reset ball, the wear-resistant sheet can be pressed against the drill bit, and it can collide with the edge of the chip groove of the drill bit, so that the metal chips stuck in the chip groove can be quickly shaken off, and the situation of entanglement on the surface of the drill bit is reduced, which can play a cleaning role.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, in particular to a punching tool for sheet-shaped hardware products. Background Art

[0002] Hardware refers to tools made of gold, silver, copper, iron, tin and other metals through casting and processing, which are used to fix things, process things or use them as decoration.

[0003] Since sheet-like hardware is thin, it is easy to deform or shift during the punching process. Therefore, a suitable fixture is needed to ensure the stability and accuracy of the workpiece during processing. In addition, during the processing, filamentary metal chips are likely to remain on the surface of the drill bit. After the drill bit is returned after drilling, the metal chips wrapped on the surface of the drill bit are likely to collide with the inner hole wall of the sheet-like hardware, resulting in irregular holes or unexpected material rupture. For this reason, we propose a punching tool for sheet-like hardware products to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a punching tool for sheet-like hardware products to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a punching tool for sheet-like hardware products, comprising a clamping base, a positioning frame arranged on the top of the clamping base, a buffer base rotatably arranged on the top of the positioning frame, and a plurality of clamping mechanisms inserted inside the positioning frame, the clamping base is provided with positioning grooves at both ends, a rectangular groove is provided inside the clamping base, and the position of the rectangular groove corresponds to the positioning frame, a plurality of welding plates are fixedly connected to the inner wall of the positioning frame, and the welding plates are evenly arranged inside the clamping base, the clamping mechanism comprises a rotating tube and a transmission rod, the rotating tube is rotatably arranged on the welding plate, the rotating tube is provided with an internal thread, the transmission rod is a threaded rod, and the transmission rod is rotatably arranged inside the rotating tube;

[0006] A docking plate is installed inside the clamping base, and the docking plate is clamped at the bottom of the rectangular groove. A plurality of fixed tubes are installed at the bottom of the docking plate. The bottom of the transmission rod is radially movably inserted in the fixed tube. A collecting ring is installed on the top of the docking plate. When the sheet-like hardware products need to be processed, they can be quickly limited and clamped with the help of the buffer base and the clamping mechanism, which can reduce the deviation of the sheet-like hardware during the clamping process. The collecting ring on the top of the docking plate can quickly clean and recycle the debris generated by grinding, reduce the accidental situation of filamentary metal chips remaining on the surface of the drill bit during continuous processing, and avoid the accidental situation of metal chips bumping against the inner hole of the sheet-like hardware during the return of the drill bit, control the processing quality of the equipment, and reduce the loss in the production process.

[0007] Preferably, a plurality of movable insertion rods are inserted on the inner wall of the buffer base, and a positioning ring is fixedly connected between the movable insertion rods. The positioning ring is elastic, and a buffer pad is installed on the top of the movable insertion rod. A rubber gasket is fixedly connected to the top of the buffer pad for buffering clamping, which can increase the contact area with the sheet hardware according to the situation and reduce the deformation of the sheet hardware and the clamping part under the action of stress caused by the force generated by extrusion during the punching process.

[0008] Preferably, the buffer base is annular and has a movable ring rotatably disposed on the inner wall, the movable ring is located at the bottom of the movable plug rod, a plurality of driving grooves are opened on the top of the movable ring, the driving grooves are inclined, a limit block is disposed at the bottom of the movable plug rod, and the limit block is movably clamped inside the driving groove;

[0009] A transmission groove is provided on the outer wall of the buffer base, a fixing tooth is provided inside the transmission groove, and the outer wall of the buffer base abuts against the outer wall of the rotating tube.

[0010] Preferably, the clamping mechanism also includes a gear ring, which is fixedly connected to the outer wall of the rotating tube, the position of the gear ring corresponds to the transmission groove, and the gear ring rotates with the buffer base to control the radial movement of the transmission rod, and can cooperate with the limiting pressure plate to clamp and position.

[0011] Preferably, a positioning shaft is installed on the top of the transmission rod, and a limiting pressure plate is installed on the bottom of one end of the positioning shaft. The limiting pressure plate is made of a pneumatic rubber plate. The limiting pressure plate can be adjusted and replaced according to actual conditions and can process different sheet hardware.

[0012] Preferably, a reset ball is provided inside the collecting ring, and the reset ball and the collecting ring are arranged concentrically, a transmission ring is fixedly connected to the surface of the reset ball, a swing piece is clamped between the outer wall of the transmission ring and the collecting ring, the swing piece is elastic and is arranged in a uniform array on the outer wall of the reset ball, a plurality of clamping shafts are installed between the swinging pieces, the clamping shafts are elastic and a plurality of plastic rings are fixedly connected to the surface, the plastic rings can extrude the metal, quickly extrude it into small particles or compress it into a ball, quickly compact and accumulate debris, and reduce the occurrence of metal chip overflow.

[0013] Preferably, a reset pad is installed on the top of the reset ball, the interior of the reset pad is concave downward, a plurality of wear-resistant sheets are installed on the side wall of the reset pad, the wear-resistant sheets are arranged in a uniform array on the outer wall of the reset pad, a straight groove is opened on the wear-resistant sheet, and a plurality of metal rings are arranged inside the straight groove;

[0014] A transmission ball is installed at the bottom of the reset pad, and a plurality of transmission shafts are fixedly connected to the transmission ball. A plurality of stretching rods are installed on the transmission ring. The stretching rod is "U"-shaped, and one end of the stretching rod is clamped on the transmission shaft. The deformation of the transmission ball can pull the transmission rod and the transmission shaft to move, and can control the movement of the external swinging piece, so as to quickly compact the collected metal chips.

[0015] Preferably, a clamping plate is installed on the swinging piece, and a plurality of arc-shaped support plates are installed on the clamping plate. The arc-shaped support plates are elastic, and mesh plates are rolled and installed at both ends of the arc-shaped support plates. Metal pads are installed on the tops of the mesh plates on both sides. Under the action of the metal pads, the arc-shaped support plates can be swung continuously, and metal chips wrapped between the arc-shaped support plates can be squeezed.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the drill bit squeezes the reset pad, the reset pad can be deformed together with the reset ball, and the wear-resistant sheet can be pressed against the drill bit, and can collide with the edge of the chip groove of the drill bit, so that the metal chips stuck in the chip groove can be quickly shaken off, reducing the situation of entanglement on the surface of the drill bit, and can play a cleaning role;

[0018] 2. The present invention can adjust the position of the movable ring according to the diameter of the drill bit required for drilling by clamping the sheet hardware on the top of the buffer plate, thereby increasing the contact area between the buffer plate and the bottom of the sheet hardware and reducing the deformation of the sheet hardware during the drilling process;

[0019] 3. The present invention can rotate the rotating tube to drive the transmission rod to move by rotating the buffer base, so that the limit pressure plate is pressed against the surface of the hardware to assist the limit support and ensure the stability of the equipment clamping;

[0020] 4. After the drill bit penetrates the sheet-like hardware, the drill bit can rest against the top of the reset pad, which can play a buffering role and reduce the collision between the bottom of the drill bit and the clamping tooling or the bed frame bracket during operation;

[0021] 5. In the present invention, the metal chips shaken off from the surface of the drill bit can splash around under the action of inertia, and can be blocked by the arc-shaped support plate to accumulate inside the collection ring, which is convenient for subsequent unified cleaning and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 This is a schematic diagram of the disassembly structure of the clamping base of the present invention;

[0024] Figure 3 For the present invention Figure 2 A partial enlarged schematic diagram in the middle;

[0025] Figure 4 It is a schematic diagram of the structure of the clamping mechanism of the present invention;

[0026] Figure 5 This is a schematic diagram of the top structure of the docking plate of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the docking plate of the present invention;

[0028] Figure 7 For the present invention Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0029] In the figure: 1. Clamping base; 2. Buffering base; 3. Clamping mechanism; 4. Docking plate; 11. Positioning frame; 21. Transmission groove; 22. Movable ring; 221. Drive groove; 23. Movable plug rod; 231. Positioning ring; 24. Buffer pad; 31. Rotating tube; 32. Gear ring; 33. Transmission rod; 34. Positioning shaft; 35. Limiting pressure plate; 41. Collecting ring; 42. Reset ball; 421. Transmission ring; 422. Stretching rod; 43. Swinging plate; 44. Snap-on shaft; 45. Snap-on plate; 46. Arc support plate; 461. Grid plate; 47. Reset pad; 471. Wear-resistant sheet; 48. Transmission ball; 481. Transmission shaft. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 7 The present invention provides a technical solution: a punching tool for sheet hardware products, comprising a clamping base 1, a positioning frame 11 arranged on the top of the clamping base 1, a buffer base 2 rotatably arranged on the top of the positioning frame 11, and a plurality of clamping mechanisms 3 inserted inside the positioning frame 11, the clamping base 1 has positioning grooves at both ends, a rectangular groove is arranged inside the clamping base 1, and the position of the rectangular groove corresponds to the positioning frame 11, a plurality of welding plates are fixedly connected to the inner wall of the positioning frame 11, and the welding plates are evenly arranged inside the clamping base 1, the clamping mechanism 3 comprises a rotating tube 31 and a transmission rod 33, the rotating tube 31 is rotatably arranged on the welding plate, the rotating tube 31 is provided with an internal thread, the transmission rod 33 is a threaded rod, and the transmission rod 33 is rotatably arranged inside the rotating tube 31;

[0032] A docking plate 4 is installed inside the clamping base 1, and the docking plate 4 is clamped at the bottom of the rectangular groove. A plurality of fixed tubes are installed at the bottom of the docking plate 4. The bottom of the transmission rod 33 is radially movably inserted inside the fixed tube. A collecting ring 41 is installed on the top of the docking plate 4. When the sheet-like hardware products need to be processed, they can be quickly limited and clamped with the help of the buffer base 2 and the clamping mechanism 3, which can reduce the displacement of the sheet-like hardware during the clamping process. The collecting ring 41 on the top of the docking plate 4 can quickly clean and recycle the debris generated by grinding, reduce the accidental situation of filamentary metal chips remaining on the surface of the drill bit during continuous processing, and avoid the accidental situation of metal chips bumping against the inner hole of the sheet-like hardware during the return of the drill bit, control the processing quality of the equipment, and reduce the loss in the production process.

[0033] like Figure 3 As shown, during the clamping process, if the contact area of ​​the clamping end is too small, the sheet hardware will be deformed under the action of stress, and a plurality of movable rods 23 are inserted on the inner wall of the buffer base 2, and a positioning ring 231 is fixedly connected between the movable rods 23, and the positioning ring 231 is elastic. A buffer pad 24 is installed on the top of the movable rod 23, and a rubber gasket is fixedly connected to the top of the buffer pad 24 for buffering clamping. The position of the movable rod 23 can be adjusted according to the diameter of the drill bit, which can ensure that there is enough contact area between the sheet hardware and the buffer pad 24, thereby ensuring the processing quality of the equipment and reducing the occurrence of defective products.

[0034] like Figure 2 As shown, in order to ensure the stability of clamping, the buffer base 2 is annular and a movable ring 22 is rotatably provided on the inner wall. The movable ring 22 is located at the bottom of the movable plug rod 23. A plurality of driving grooves 221 are opened on the top of the movable ring 22. The driving grooves 221 are inclined. A limit block is provided at the bottom of the movable plug rod 23, and the limit block is movably clamped inside the driving groove 221. The position of the movable ring 22 can be adjusted to drive the movable plug rod 23 to move, so as to support and position the sheet-like hardware.

[0035] A transmission groove 21 is provided on the outer wall of the buffer base 2 , and a fixed tooth is provided inside the transmission groove 21 . The outer wall of the buffer base 2 abuts against the outer wall of the rotating tube 31 . The rotation of the buffer base 2 can drive the rotating tube 31 to rotate, and the transmission rod 33 can move inside the rotating tube 31 .

[0036] like Figure 4 As shown, the clamping mechanism 3 also includes a gear ring 32, which is fixedly connected to the outer wall of the rotating tube 31. The position of the gear ring 32 corresponds to the transmission groove 21. The gear ring 32 rotates with the buffer base 2 to control the radial movement of the transmission rod 33. A single or multiple rotating tubes 31 can be removed according to actual needs to reduce interference in the limiting process of the surface of the sheet hardware.

[0037] like Figure 4 As shown, in order to ensure the stability of clamping, a positioning shaft 34 is installed on the top of the transmission rod 33, and a limiting pressure plate 35 is installed on the bottom of one end of the positioning shaft 34. The limiting pressure plate 35 is made of a pneumatic rubber plate. The limiting pressure plate 35 can be adjusted and replaced according to actual conditions. The limiting pressure plate 35 can be used to press against the surface of the sheet hardware for clamping and positioning, which can reduce the accidental situation of clamping marks on the surface of the hardware or deformation of the sheet hardware.

[0038] like Figure 5 As shown, in order to reduce the inconvenience of cleaning caused by the scattering of metal chips, a reset ball 42 is provided inside the collecting ring 41. The reset ball 42 is concentrically arranged with the collecting ring 41, and a transmission ring 421 is fixedly connected to the surface of the reset ball 42. A swing piece 43 is clamped between the outer wall of the transmission ring 421 and the collecting ring 41. The swing piece 43 is elastic and is uniformly arranged on the outer wall of the reset ball 42. A plurality of clamping shafts 44 are installed between the swing pieces 43. The clamping shafts 44 are elastic and a plurality of plastic rings are fixedly connected to the surface. The metal chips dropped during the drilling process can be accumulated between the clamping shafts 44, and the movement of the clamping shafts 44 can compact and squeeze the metal chips, thereby avoiding the situation where the gaps between the metal chips are too large and preventing the accumulation of too many metal chips at the bottom during the processing.

[0039] like Figure 7 As shown, in order to reduce the damage caused by collision between metal chips and the inner hole of the sheet hardware during the drilling process, a reset pad 47 is installed on the top of the reset ball 42, and the interior of the reset pad 47 is recessed downward. A plurality of wear-resistant sheets 471 are installed on the side wall of the reset pad 47. The wear-resistant sheets 471 are evenly arranged on the outer wall of the reset pad 47. Straight grooves are opened on the wear-resistant sheets 471, and a plurality of metal rings are arranged inside the straight grooves. As the drill bit can be pressed against the top of the reset pad 47, it can play a buffering role, reducing the bottom of the drill bit and the friction between the bottom and the bottom of the drill bit during operation. When the clamping tool or the bed frame bracket is bumped, and as the drill bit squeezes the reset pad 47, the reset pad 47 can be deformed together with the reset ball 42, and the wear-resistant sheet 471 can be pressed against the drill bit, and can collide with the edge of the chip groove of the drill bit, so that the metal chips stuck in the chip groove can be quickly shaken off, reducing the situation of being entangled on the surface of the drill bit, and the metal ring in the wear-resistant sheet 471 can quickly hook out the long strips of metal chips wrapped around the drill bit, which can improve the cleaning effect and reduce the situation of bumping against hardware;

[0040] A transmission ball 48 is installed at the bottom of the reset pad 47, and a plurality of transmission shafts 481 are fixedly connected to the transmission ball 48. A plurality of stretching rods 422 are installed on the transmission ring 421. The stretching rod 422 is "U"-shaped, and one end of the stretching rod 422 is clamped on the transmission shaft 481. The transmission ball 48 and the transmission shaft 481 can be deformed under the action of the reset pad 47, and can cooperate with the transmission ring 421 to pull the external swinging piece 43 to move.

[0041] like Figure 6 As shown, in order to reduce the trouble of filamentary metal chips in the subsequent cleaning process, a clamping plate 45 is installed on the swinging piece 43, and a plurality of arc-shaped support plates 46 are installed on the clamping plate 45. The arc-shaped support plates 46 are elastic, and mesh plates 461 are rolled and installed at both ends of the arc-shaped support plates 46. Metal pads are installed on the tops of the mesh plates 461 on both sides. The shaken metal chips can splash around under the action of inertia, and can be blocked by the arc-shaped support plates 46 to accumulate inside the collecting ring 41. When the swinging piece 43 moves, it can drive the arc-shaped support plates 46 on the top to cooperate with the metal pads to move, and can knock and squeeze the metal stuck between the arc-shaped support plates 46 under the action of the mesh plates 461, and squeeze and pull the long strips of metal chips to break them into metal chips of uniform size.

[0042] Working principle: First, when it is necessary to process sheet-like hardware products, the buffer base 2 and the clamping mechanism 3 can be used to quickly limit and clamp them, which can reduce the deviation of sheet-like hardware during the clamping process. The collecting ring 41 on the top of the docking plate 4 can quickly clean and recycle the debris generated by grinding, reduce the accidental situation of filamentary metal chips remaining on the surface of the drill bit during continuous processing, and avoid the accidental situation of metal chips hitting the inner hole of the sheet-like hardware during the return of the drill bit, control the processing quality of the equipment, reduce the loss in the production process, and during the clamping process, the sheet-like hardware can be clamped on the top of the buffer pad 24. , the position of the movable ring 22 can be adjusted according to the diameter of the drill bit to be punched, the movable plug rod 23 can be pulled to move under the action of the driving groove 221, the contact area with the bottom of the sheet hardware can be increased, and the deformation of the sheet hardware during the drilling process can be reduced. When the positioning needs to be clamped, the buffer base 2 can be rotated, the rotating tube 31 can be rotated to drive the transmission rod 33 to move, and the limit pressure plate 35 can be pressed against the surface of the hardware for auxiliary limit support, which can ensure the stability of the equipment clamping, and the size of the limit pressure plate 35 and its position at the bottom of the positioning shaft 34 can be adjusted according to the conditions of different sheet hardware to ensure the processing quality of the equipment;

[0043] Then, during the drilling process, the operator can control the drilling equipment to process the sheet hardware, and after the drill bit penetrates the sheet hardware, the drill bit can be against the top of the reset pad 47, which can play a buffering role and reduce the collision between the bottom of the drill bit and the clamping tooling or the bed frame bracket during operation, and as the drill bit squeezes the reset pad 47, the reset pad 47 can be deformed together with the reset ball 42, and the wear-resistant sheet 471 can be pressed against the drill bit, which can collide with the edge of the drill bit's chip groove, so that the metal chips stuck in the chip groove can be quickly shaken off, reducing and entangled on the drill bit surface, which can play a cleaning role, and the shaken-off metal chips can splash around under the action of inertia, and can be blocked by the arc support plate 46, so that they are accumulated inside the collection ring 41, which is convenient for subsequent unified cleaning and maintenance;

[0044] Finally, when the reset pad 47 is squeezed, it can push the transmission ball 48 and the transmission shaft 481 to move, and cooperate with the transmission ring 421 to pull the swing plate 43 to move, and can shake the metal chips off between the clamping shafts 44. In the process of the movement of the swing plate 43, the metal chips can be stuck between the plastic rings on the surface of the clamping shaft 44, playing a role of limiting collection.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A punching tool for sheet-like hardware products, comprising a clamping base (1), a positioning frame (11) arranged on the top of the clamping base (1), a buffer base (2) rotatably arranged on the top of the positioning frame (11), and a plurality of clamping mechanisms (3) inserted inside the positioning frame (11), characterized in that: Positioning grooves are provided at both ends of the clamping base (1); a rectangular groove is provided inside the clamping base (1), and the position of the rectangular groove corresponds to the positioning frame (11); a plurality of welding plates are fixedly connected to the inner wall of the positioning frame (11), and the welding plates are evenly arranged inside the clamping base (1); the clamping mechanism (3) comprises a rotating tube (31) and a transmission rod (33); the rotating tube (31) is rotatably arranged on the welding plate; an internal thread is provided inside the rotating tube (31); the transmission rod (33) is a threaded rod; and the transmission rod (33) is rotatably arranged inside the rotating tube (31); A docking plate (4) is installed inside the clamping base (1), the docking plate (4) is clamped at the bottom of the rectangular groove, a plurality of fixed tubes are installed at the bottom of the docking plate (4), the bottom of the transmission rod (33) is radially movably inserted inside the fixed tube, and a collecting ring (41) is installed at the top of the docking plate (4); A reset ball (42) is provided inside the collection ring (41), the reset ball (42) and the collection ring (41) are arranged concentrically, a transmission ring (421) is fixedly connected to the surface of the reset ball (42), a swing plate (43) is clamped between the outer wall of the transmission ring (421) and the collection ring (41), the swing plate (43) is elastic and is arranged in a uniform array on the outer wall of the reset ball (42), a plurality of clamping shafts (44) are installed between the swing plates (43), the clamping shafts (44) are elastic and a plurality of plastic rings are fixedly connected to the surface.

2. The punching tool for sheet metal products according to claim 1, characterized in that: A plurality of movable insertion rods (23) are inserted on the inner wall of the buffer base (2), positioning rings (231) are fixedly connected between the movable insertion rods (23), the positioning rings (231) are elastic, a buffer pad (24) is installed on the top of the movable insertion rods (23), and a rubber gasket is fixedly connected to the top of the buffer pad (24) for buffer clamping.

3. The punching tool for sheet metal products according to claim 2, characterized in that: The buffer base (2) is annular and has a movable ring (22) rotatably provided on the inner wall, the movable ring (22) is located at the bottom of the movable plug rod (23), a plurality of driving grooves (221) are provided on the top of the movable ring (22), the driving grooves (221) are arranged in an inclined manner, a limit block is provided at the bottom of the movable plug rod (23), and the limit block is movably clamped inside the driving groove (221); A transmission groove (21) is provided on the outer wall of the buffer base (2), a fixed tooth is provided inside the transmission groove (21), and the outer wall of the buffer base (2) abuts against the outer wall of the rotating tube (31).

4. The punching tool for sheet metal products according to claim 1, characterized in that: The clamping mechanism (3) further comprises a gear ring (32), the gear ring (32) being fixedly connected to the outer wall of the rotating tube (31), the position of the gear ring (32) corresponding to the transmission groove (21), and the gear ring (32) rotating along with the buffer base (2) to control the radial movement of the transmission rod (33).

5. The punching tool for sheet metal products according to claim 4, characterized in that: A positioning shaft (34) is mounted on the top of the transmission rod (33), and a limiting pressure plate (35) is mounted on the bottom of one end of the positioning shaft (34). The limiting pressure plate (35) is made of a pneumatic rubber plate, and the limiting pressure plate (35) can be adjusted and replaced according to actual conditions.

6. The punching tool for sheet metal products according to claim 1, characterized in that: A reset pad (47) is installed on the top of the reset ball (42), the interior of the reset pad (47) is arranged to be concave downwards, a plurality of wear-resistant sheets (471) are installed on the side wall of the reset pad (47), the wear-resistant sheets (471) are arranged in a uniform array on the outer wall of the reset pad (47), a straight groove is opened on the wear-resistant sheet (471), and a plurality of metal rings are arranged inside the straight groove; A transmission ball (48) is mounted on the bottom of the reset pad (47), a plurality of transmission shafts (481) are fixedly connected to the transmission ball (48), a plurality of stretching rods (422) are mounted on the transmission ring (421), the stretching rods (422) are U-shaped, and one end of the stretching rod (422) is clamped on the transmission shaft (481).

7. The punching tool for sheet metal products according to claim 1, characterized in that: A clamping plate (45) is mounted on the swing plate (43), a plurality of arc-shaped support plates (46) are mounted on the clamping plate (45), the arc-shaped support plates (46) are elastic, mesh plates (461) are rolled and mounted on both ends of the arc-shaped support plates (46), and metal pads are mounted on the tops of the mesh plates (461) on both sides.

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