Die casting trimming device

Abstract

The invention discloses a die casting trimming device, and belongs to the technical field of die casting trimming, the die casting trimming device comprises a punching unit and a polishing unit, the punching unit comprises a positioning assembly for positioning a die casting and a punching assembly for cutting off waste; the polishing unit comprises a polishing plate making contact with the outer edge of the die casting and a driving assembly driving the polishing plate to do reciprocating motion in the longitudinal direction, the inner side of the polishing plate is provided with a polishing face, the polishing plate is matched with the die casting in shape, and the polishing plate conducts detail trimming on residual burrs after punching. According to the device, the die casting can be primarily punched to remove waste, then the polishing plate is used for trimming the remaining burrs, and therefore the machining precision is greatly improved, the polishing plate is designed to be matched with the shape of the die casting, it is ensured that the burrs are comprehensively removed, and the machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of die casting trimming, and in particular to a die casting trimming device. Background Art

[0002] Automotive die castings refer to automotive parts manufactured using die casting technology. After die casting, some irregular or incompletely cut metal edges are usually formed on the edges of automotive die castings. In order to avoid the metal edges affecting the quality of die castings, a punching device is required to cut off the metal edge waste of die castings. After the existing punching device punches the metal edge of the die casting, there will be certain small burrs on the die casting, which affect the quality of the die casting. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that after the existing punching device mentioned in the above background technology punches the metal edge of the die-casting, there will be certain small burrs on the die-casting, and the small burrs affect the quality of the die-casting.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A die-casting trimming device comprises a punching unit and a grinding unit. The punching unit comprises a positioning component for positioning the die-casting and a punching component for cutting off waste materials. The grinding unit comprises a grinding plate for contacting the outer edge of the die-casting and a driving component for driving the grinding plate to reciprocate in the longitudinal direction. The inner side of the grinding plate has a grinding surface. The grinding plate is adapted to the outer shape of the die-casting and the grinding plate performs detailed trimming of the remaining burrs after punching.

[0005] Preferably, a guide bevel is provided on the lower side of the grinding plate, and the guide bevel is located on the lower side of the grinding surface.

[0006] Preferably, the positioning assembly includes a support seat for placing the die casting, a support block is fixed to the lower end of the support seat, a base is fixed to the lower end of the support block, and the base is fixed on the operating table.

[0007] Preferably, the punching assembly comprises a punching plate and a hydraulic cylinder, the punching plate is provided with a through slot, and a cutter is installed on the side wall of the through slot.

[0008] Preferably, a horizontal plate is provided on the upper side of the punching plate, and the horizontal plate and the punching plate are fixed by a vertical plate 1, a guide plate is provided on the upper side of the horizontal plate, and the guide plate and the horizontal plate are fixed by a vertical plate 2, a sleeve 1 is fixed to the lower surface of the horizontal plate, a sleeve 2 is sleeved on the sleeve 1, a lower pressure block is fixed to the lower end of the sleeve 2, a spring 1 is provided in the sleeve 1, and the two ends of the spring 1 are respectively connected to the horizontal plate and the lower pressure block, a sliding rod is fixed on the lower pressure block, the sliding rod passes through the horizontal plate, and a limiting plate is fixed to the top end of the sliding rod.

[0009] Preferably, the driving assembly includes a driving wheel, an eccentric driving rod is fixedly connected to the driving wheel, a lifting rod is fixed on the polishing plate, a lifting frame is fixed to the upper end of the lifting rod, and the upper and lower ends of the driving wheel are in contact with the inner top wall and the inner bottom wall of the lifting frame respectively.

[0010] Preferably, a support assembly is provided on the punching plate, and the support assembly includes a support ring, which is sleeved on sleeve 2, and a plate body is fixed on both sides of the support ring, and support rods pass through both ends of the plate body, and the lower end of the support rod is fixed to the punching plate, and spring 2 is sleeved on the support rod, and the two ends of the spring 2 are respectively connected to the plate body and the top end of the support rod.

[0011] Preferably, the driving assembly further comprises a driving tooth plate fixed on the punching plate, a driving gear is fixed on the driving rod, and the driving tooth plate and the driving gear are connected via a speed increasing gear set.

[0012] Preferably, the four sides of the support block are provided with guide surfaces, the base is provided with symmetrical guide grooves, a guide plate is fixed on the base, both ends of the guide plate correspond to the guide grooves, and an outflow groove is provided at the lower end of the guide groove.

[0013] Preferably, a pushing assembly is arranged between the punching assembly and the base, and the pushing assembly includes a fixed block arranged on one side of the guide groove, a screw rod is rotatably connected in the fixed block, a moving block is connected to the screw rod, a push plate inserted into the guide groove is connected to the moving block, a connecting rack is fixed on the punching assembly, a connecting gear is arranged on one side of the connecting rack, a connecting rod is arranged on the lower side of the connecting gear, the connecting rod and the connecting gear are connected by a speed increasing component, and the connecting rod and the screw rod are connected by a bevel gear pair.

[0014] Compared with the prior art, the present invention has the following beneficial effects: Through the coordinated work of the punching unit and the grinding unit, the device can first perform preliminary punching on the die casting to remove waste, and then use the grinding plate to perform detailed trimming of the remaining burrs, thereby greatly improving the processing accuracy. The design of the grinding plate makes it compatible with the shape of the die casting, ensuring the comprehensive removal of burrs and improving processing efficiency. The setting of the guide surface and guide groove effectively guides the cut waste to avoid the accumulation and interference of waste. At the same time, the automatic pushing function of the pusher assembly further simplifies the waste handling process and improves the neatness and efficiency of the production line; The setting of spring 1 and spring 2 plays a role of buffering and protection, which not only ensures the stability during punching and grinding, but also avoids equipment damage or deformation of die castings caused by excessive impact; BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 Schematic diagram of the outflow trough of the present invention.

[0018] Figure 3 It is a schematic diagram of the punching plate, the cross plate and the guide plate of the present invention.

[0019] Figure 4 It is a schematic diagram of the guide groove and the screw rod of the present invention.

[0020] Figure 5 It is a schematic diagram of the positioning component of the present invention.

[0021] Figure 6 For the present invention Figure 5 Enlarged schematic diagram at point A in the middle.

[0022] Figure 7 It is a schematic diagram of a spring of the present invention.

[0023] Figure 8 Schematic diagram of the driving assembly of the present invention.

[0024] Fig. 9 It is a schematic diagram of a grinding plate of the present invention.

[0025] Fig.10 It is a schematic diagram of the guide edge of the present invention.

[0026] Description of the figure numbers: 1. Positioning assembly; 11. Support seat; 12. Support block; 121. Guide surface; 13. Base; 14. Guide groove; 15. Guide plate; 16. Outflow groove; 17. Block plate; 2. Punching assembly; 21. Punching plate; 211. Through groove; 212. Cutter; 213. Guide edge; 22. Hydraulic cylinder; 23. Horizontal plate; 231. Vertical plate 1; 232. Vertical plate 2; 24. Guide plate; 25. Sleeve 1; 26. Sleeve 2; 27. Lower pressure block; 28. Spring 1; 29. ​​Slide rod; 291. Limit plate; 3. Grinding plate; 31. Grinding surface; 32. Guide bevel; 4. Drive assembly; 41. Drive wheel; 42. Drive rod; 43. Lifting rod; 44. Lifting frame; 45. Drive tooth plate; 46. Drive gear; 47. Speed ​​increasing gear set one; 5. Support assembly; 51. Support ring; 52. Plate; 53. Support rod; 54. Spring two; 6. Pushing assembly; 61. Fixed block; 62. Screw rod; 63. Moving block; 64. Pushing plate; 65. Connecting rack; 66. Connecting gear; 67. Connecting rod; 68. Speed ​​increasing component; 681. Pulley assembly; 682. Speed ​​increasing gear set two; 69. Bevel gear pair; 7. Operating table. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings.

[0028] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be used for other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0029] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0030] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0031] See also Figure 1 - Fig.10A die casting trimming device includes a punching unit and a grinding unit. The punching unit includes a positioning component 1 for positioning the die casting and a punching component 2 for cutting off waste; the grinding unit includes a grinding plate 3 contacting the outer edge of the die casting and a driving component 4 driving the grinding plate 3 to reciprocate in the longitudinal direction. The inner side of the grinding plate 3 has a grinding surface 31. The grinding plate 3 is made of metal. The metal grinding plate 3 is the prior art. The lower side of the grinding plate 3 is provided with a guide bevel 32 for easy descent. The guide bevel 32 is located on the lower side of the grinding surface 31. The grinding plate 3 performs detailed trimming on the remaining burrs after punching. The grinding plate 3 is adapted to the shape of the die casting, so as to facilitate grinding all burrs on the outer edge.

[0032] The positioning assembly 1 includes a support seat 11 for placing the die casting, a support block 12 is fixed to the lower end of the support seat 11, and the shape of the support seat 11 is the same as the shape of the die casting after punching. A base 13 is fixed to the lower end of the support block 12, and the base 13 is fixed on the operating table 7.

[0033] The punching assembly 2 includes a punching plate 21 and a hydraulic cylinder 22. A through slot 211 is provided on the punching plate 21. The through slot 211 is adapted to the lower pressing block 27. A cutter 212 is installed on the side wall of the through slot 211. The hydraulic cylinder 22 is fixed to the top of the operating table 7. A guide edge 213 is provided around the through slot 211. The guide edge 213 guides the fallen burrs to prevent the burrs from accumulating on the edge of the through slot 211.

[0034] A horizontal plate 23 is arranged on the upper side of the punching plate 21, and the horizontal plate 23 and the punching plate 21 are fixed by a vertical plate 1 231. A guide plate 24 is arranged on the upper side of the horizontal plate 23, and the guide plate 24 and the horizontal plate 23 are fixed by a vertical plate 232. A guide column is arranged on the operating table 7, and the guide column passes through the guide plate 24. The upper and lower ends of the guide column are respectively fixed to the operating table 7 and the base 13. The guide plate 24, the horizontal plate 23 and the punching plate 21 are fixed together by the vertical plate 1 231 and the vertical plate 232. A sleeve 1 25 is fixed on the lower surface of the horizontal plate 23, and the sleeve 1 25 is fixedly connected to the horizontal plate 23. A sleeve 26 is sleeved on the sleeve 1 25, a part of the sleeve 1 25 is located in the sleeve 26, a lower end of the sleeve 26 is fixed with a lower pressure block 27, the sleeve 26 is fixedly connected to the lower pressure block 27, a spring 28 is arranged in the sleeve 1 25, both ends of the spring 28 are respectively connected to the cross plate 23 and the lower pressure block 27, the lower pressure block 27 contacts with the die casting first, and then the cutter 212 cuts the waste, a slide bar 29 is fixed on the lower pressure block 27, the slide bar 29 passes through the cross plate 23, a limit plate 291 is fixed to the top end of the slide bar 29, and the limit plate 291 prevents the separation of the sleeve 26 and the sleeve 1 25.

[0035] The driving assembly 4 includes a driving wheel 41, which is symmetrically arranged. An eccentric driving rod 42 is fixedly connected to the driving wheel 41, a lifting rod 43 is fixed to the grinding plate 3, a lifting frame 44 is fixed to the upper end of the lifting rod 43, and the driving wheel 41 is located in the lifting frame 44. The upper and lower ends of the driving wheel 41 are in contact with the inner top wall and the inner bottom wall of the lifting frame 44 respectively. The driving wheel 41 rotates to make the lifting frame 44 rise and fall.

[0036] A support assembly 5 is provided on the punching plate 21, and the support assembly 5 includes a support ring 51, which is sleeved on the sleeve 26, and a plate body 52 is fixed on both sides of the support ring 51. Support rods 53 pass through both ends of the plate body 52, and the lower end of the support rod 53 is fixed to the punching plate 21. A spring 2 54 is sleeved on the support rod 53, and the two ends of the spring 2 54 are respectively connected to the plate body 52 and the top of the support rod 53. The support ring 51 is located on the upper side of the punching plate 21, and the lifting rod 43 passes through the side ears on the support ring 51. The support ring 51 enables the lifting rod 43 to be lifted and lowered stably.

[0037] The driving assembly 4 also includes a driving toothed plate 45 fixed on the punching plate 21, and a driving gear 46 is fixed on the driving rod 42. The driving toothed plate 45 and the driving gear 46 are connected through a speed increasing gear set 47. Figure 8 As shown, the speed-increasing gear set 47 is composed of a plurality of large gears and small gears. The speed-increasing gear set 47 is a prior art and will not be described in detail. The speed-increasing gear set 47 is used to increase the rotation speed of the driving rod 42, thereby increasing the rotation speed of the driving wheel 41, so that the grinding plate 3 can reciprocate quickly, and the driving gear plate 45 is always engaged with the small gear in the speed-increasing gear set 47.

[0038] The support seat 11 protrudes from the support block 12, so that the punching plate 21 has space to descend. The four sides of the support block 12 are provided with guide surfaces 121, and the guide surfaces 121 guide the cut waste. The base 13 is provided with symmetrical guide grooves 14, and the guide grooves 14 are inclined. A guide plate 15 is fixed on the base 13, and the guide plate 15 is located at the upper end of the guide groove 14. The two ends of the guide plate 15 correspond to the guide groove 14, and the guide plate 15 is arranged in an inverted V shape. The lower end of the guide groove 14 is provided with an outflow groove 16, and a storage frame is provided on one side of the operating table 7. The storage frame is located on the lower side of the outflow groove 16, and the storage frame is not shown in the diagram. The base 13 and the operating table 7 both have a part of the outflow groove 16, and the waste in the guide groove 14 flows into the outflow groove 16.

[0039] A pusher assembly 6 is provided between the punching assembly 2 and the base 13, and the pusher assembly 6 includes a fixed block 61 provided on one side of the guide groove 14, a slide groove is provided on the fixed block 61, a screw rod 62 is rotatably connected in the fixed block 61, a moving block 63 is connected to the screw rod 62, and the connection between the screw rod 62 and the moving block 63 is a prior art, the moving block 63 is located in the slide groove, the slide groove limits the moving block 63, and the moving block 63 is connected to a push plate 64 inserted into the guide groove 14, a connecting rack 65 is fixed on the punching assembly 2, a connecting gear 66 is provided on one side of the connecting rack 65, the connecting gear 66 is rotatably connected to one side of the operating table 7, and a connecting rod is provided on the lower side of the connecting gear 66 67, the connecting rod 67 is rotatably connected with the operating table 7, the connecting rod 67 is connected with the connecting gear 66 through the speed increasing component 68, the connecting rod 67 is connected with the screw rod 62 through the bevel gear pair 69, the connecting rod 67 has two pairs of bevel gear pairs 69 for connecting the two screw rods 62, the speed increasing component 68 includes a pulley assembly 681 and a second speed increasing gear set 682, the second speed increasing gear set 682 is also the prior art, the pulley assembly 681 is composed of two belt gears, one large and one small, for speed increasing, the belt is a toothed belt, the transmission is more stable, the upper belt gear is coaxially fixed with the connecting gear 66, the small belt gear is located at the lower side and connected with the second speed increasing gear set 682. A blocking plate 17 is provided on one side of the guide plate 15 to prevent waste from flowing out, the blocking plate 17 has a placement groove, and the push plate 64 is located in the placement groove to prevent the waste from being blocked by the push plate 64.

[0040] When in use, the die casting is placed on the support seat 11, and then the hydraulic cylinder 22 makes the punching assembly 2 and the grinding unit descend, the lower pressing block 27 is first pressed on the die casting to stabilize the die casting, and then the guide plate 24, the cross plate 23 and the punching plate 21 continue to descend, and the cutter 212 on the punching plate 21 cuts off the waste material on the outside of the die casting, and then the punching plate 21 continues to descend. When the support ring 51 contacts the lower pressing block 27, the grinding plate 3 stops moving downward. At this time, the grinding surface 31 contacts the outer side of the die casting, and the punching plate 21 continues to descend, driving the tooth plate 45 and the support ring 51. The rod 53 descends together, and the spring 2 54 is compressed. The compression of the spring 2 54 stabilizes the support ring 51. The driving gear plate 45 makes the driving gear 46 rotate rapidly through the speed increasing gear set 1 47. The driving gear 46 makes the driving wheel 41 rotate rapidly through the driving rod 42. The lifting frame 44 reciprocates up and down through the eccentric setting of the driving wheel 41. The lifting frame 44 reciprocates up and down with the lifting rod 43 and the grinding plate 3. The up and down movement of the grinding plate 3 not only grinds and removes burrs from the cut-off part of the die casting, but also grinds the original outer burrs of the die casting. In the process of the cutter 212 cutting off the waste material and continuing to move down, the sleeve 26 does not move, the horizontal plate 23 descends with the sleeve 1 25, and the spring 1 28 is compressed; During the process of the guide plate 24 descending, the connecting rack 65 first meshes with the connecting gear 66, and the connecting gear 66 rotates the connecting rod 67 through the speed increasing component 68, and the connecting rod 67 rotates the screw rod 62 through the bevel gear pair 69, and the screw rod 62 makes the moving block 63 and the push plate 64 move from the lower end to the upper end of the guide groove 14. When the connecting rack 65 is separated from the connecting gear 66, the push plate 64 enters the placement groove, and the cutter 212 cuts off the waste again; The die casting has waste on four sides. The cut waste on the four sides enters the guide groove 14 or the outflow groove 16 through the cooperation of the guide surface 121 and the guide plate 15. The waste entering the guide groove 14 flows out directly or stops. The waste that stops is pushed away by the push plate 64 when the connecting rack 65 returns. During the rising process of the punching assembly 2, the hydraulic cylinder 22 causes the punching plate 21, the cross plate 23 and the guide plate 24 to move upward together, the spring 2 54 slowly recovers, and the spring 1 28 also slowly recovers, until the plate body 52 and the support ring 51 move upward, the upward movement of the driving tooth plate 45 also causes the grinding plate 3 to reciprocate up and down, and the grinding effect is better. When the punching plate 21 moves upward and contacts the plate body 52, the spring 2 54 is fully recovered, the punching plate 21 moves upward with the plate body 52, and the plate body 52 moves upward with the support ring 51. At this time, the driving tooth plate 45 no longer drives the speed increase gear set 1 47, and the grinding plate 3 moves upward with the support ring 51. When the spring 1 28 recovers, the punching The cutting plate 21, the cross plate 23 and the guide plate 24 continue to move upward, and the lower pressing block 27 is separated from the die casting until the punching assembly 2 returns to its original position on the upper side. During the rising process of the guide plate 24, the connecting rack 65 first meshes with the connecting gear 66, and the connecting gear 66 rotates the connecting rod 67 through the speed increasing component 68. The connecting rod 67 rotates the screw rod 62 through the bevel gear pair 69. The screw rod 62 causes the moving block 63 and the push plate 64 to move from the upper end to the lower end of the guide groove 14, and the push plate 64 pushes the waste in the guide groove 14 to move. When the connecting rack 65 is separated from the connecting gear 66, the waste is pushed into the outflow groove 16, and the push plate 64 also stops moving.

[0041] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A die casting trimming device, characterized in that: include: A punching unit, comprising a positioning component (1) for positioning the die casting and a punching component (2) for cutting off waste material; A grinding unit comprises a grinding plate (3) contacting the outer edge of a die-casting and a driving assembly (4) driving the grinding plate (3) to reciprocate in the longitudinal direction, wherein the inner side of the grinding plate (3) has a grinding surface (31), the grinding plate (3) is adapted to the outer shape of the die-casting, and the grinding plate (3) performs detailed trimming of the remaining burrs after punching.

2. A die casting trimming device according to claim 1, characterized in that: A guide bevel (32) is provided on the lower side of the grinding plate (3), and the guide bevel (32) is located on the lower side of the grinding surface (31).

3. A die casting trimming device according to claim 1, characterized in that: The positioning assembly (1) comprises a support seat (11) for placing the die casting, a support block (12) is fixed at the lower end of the support seat (11), a base (13) is fixed at the lower end of the support block (12), and the base (13) is fixed on the operating table (7).

4. A die casting trimming device according to claim 1, characterized in that: The punching assembly (2) comprises a punching plate (21) and a hydraulic cylinder (22); a through slot (211) is provided on the punching plate (21); a cutter (212) is installed on the side wall of the through slot (211).

5. A die casting trimming device according to claim 4, characterized in that: A transverse plate (23) is arranged on the upper side of the punching plate (21), and the transverse plate (23) and the punching plate (21) are fixed via a first vertical plate (231). A guide plate (24) is arranged on the upper side of the transverse plate (23), and the guide plate (24) and the transverse plate (23) are fixed via a second vertical plate (232). A sleeve (25) is fixed on the lower surface of the transverse plate (23), and a second sleeve (26) is sleeved on the first sleeve (25). A lower pressure block (27) is fixed at the lower end of the second sleeve (26). A spring (28) is arranged inside the first sleeve (25), and two ends of the spring (28) are respectively connected to the transverse plate (23) and the lower pressure block (27). A slide bar (29) is fixed on the lower pressure block (27), and the slide bar (29) passes through the transverse plate (23). A limit plate (291) is fixed at the top end of the slide bar (29).

6. A die casting trimming device according to claim 5, characterized in that: The driving assembly (4) comprises a driving wheel (41), an eccentric driving rod (42) being fixedly connected to the driving wheel (41), a lifting rod (43) being fixed to the grinding plate (3), a lifting frame (44) being fixed to the upper end of the lifting rod (43), and the upper and lower ends of the driving wheel (41) respectively contacting the inner top wall and the inner bottom wall of the lifting frame (44).

7. A die casting trimming device according to claim 6, characterized in that: A support assembly (5) is provided on the punching plate (21), and the support assembly (5) comprises a support ring (51), the support ring (51) is sleeved on the second sleeve (26), a plate body (52) is fixed on both sides of the support ring (51), support rods (53) pass through both ends of the plate body (52), the lower end of the support rod (53) is fixed to the punching plate (21), and a second spring (54) is sleeved on the support rod (53), and the two ends of the second spring (54) are respectively connected to the top of the plate body (52) and the support rod (53).

8. A die casting trimming device according to claim 7, characterized in that: The driving assembly (4) further comprises a driving toothed plate (45) fixed on the punching plate (21), a driving gear (46) fixed on the driving rod (42), and the driving toothed plate (45) and the driving gear (46) are connected via a speed increasing gear set 1 (47).

9. A die casting trimming device according to claim 3, characterized in that: The support block (12) is provided with flow guide surfaces (121) on four sides, the base (13) is provided with symmetrical flow guide grooves (14), a flow guide plate (15) is fixed on the base (13), two ends of the flow guide plate (15) correspond to the flow guide grooves (14), and an outflow groove (16) is provided at the lower end of the flow guide groove (14).

10. A die casting trimming device according to claim 9, characterized in that: A pusher assembly (6) is arranged between the punching assembly (2) and the base (13), the pusher assembly (6) comprising a fixed block (61) arranged on one side of the guide groove (14), a screw rod (62) being rotatably connected inside the fixed block (61), a moving block (63) being connected to the screw rod (62), a push plate (64) being connected to the moving block (63) and being inserted into the guide groove (14), a connecting rack (65) being fixed to the punching assembly (2), a connecting gear (66) being arranged on one side of the connecting rack (65), a connecting rod (67) being arranged on the lower side of the connecting gear (66), the connecting rod (67) being connected to the connecting gear (66) via a speed increasing component (68), and the connecting rod (67) being connected to the screw rod (62) via a bevel gear pair (69).

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