CN117000851A - Stamping device for metal workpiece - Google Patents

Abstract

The application discloses a stamping device for a metal workpiece, which comprises an equipment frame, a die holder, a top seat and a stamping mechanism, and comprises: station switching component: a rotary seat is movably arranged between the equipment rack and the top seat; three square frames distributed in an annular shape are arranged on the outer side of the rotary seat; a turnover component: the inside of the rotary seat is connected with a sliding block corresponding to the square frame in a sliding manner; clamping component: the inner side of the square frame is slidably provided with a clamp for clamping a metal workpiece, and the bottom of the rotary seat is rotationally connected with a rotary disc. According to the application, firstly, the stations of the metal workpiece are switched along the three square frames annularly arranged on the rotary seat, so that the stamping forming efficiency of the metal workpiece is improved, secondly, the rotation of the rotary disc is controlled through the first telescopic machine, the synchronous control of tensioning of a plurality of groups of clamps can be realized, and the positions of the three square frames are simultaneously switched through the arrangement of the second telescopic mechanism and the driving motor, so that the investment and the use cost of the stamping device are reduced.

Description

Stamping device for metal workpiece

Technical Field

The application relates to the technical field of metal workpiece processing, in particular to a stamping device for a metal workpiece.

Background

Metal stamping is a process of manufacturing a workpiece in which a sheet metal material is formed into a three-dimensional shape using a metal stamping die or a series of metal stamping dies.

In the process of stamping a metal workpiece with complex shapes, two sections of the front and back sides of the metal workpiece are required to be processed, and after the stamping forming of the metal workpiece is completed, the metal workpiece is required to be overturned and sent to a die on the other side for stamping forming; in the prior art, a metal workpiece is clamped by a control manipulator, so that the metal workpiece is separated from a forming die upwards under the action of the manipulator, then the station of the metal workpiece is switched by controlling the horizontal movement of the manipulator, then the metal workpiece is turned over and placed on a corresponding forming die, and under the condition that only one set of manipulator is arranged, the stamping device can continue to process the next group of metal workpiece after all the processing procedures are completed on the condition that the metal workpiece is required to wait, so that the problem of lower efficiency of the existing stamping device is caused; if continuous stamping processing of batch metal workpieces is realized by arranging a plurality of sets of mechanical arms with electric control tightness, electric control movement and electric control turning, the problems of higher equipment investment, higher equipment use and higher equipment maintenance cost can exist.

Based on the defects, a stamping device for metal workpieces is provided.

Disclosure of Invention

The application aims at: in order to solve the above problems, a metal workpiece stamping device is proposed.

In order to achieve the above purpose, the present application adopts the following technical scheme: the utility model provides a stamping device of metal work piece, includes the equipment rack, sets firmly two die holders on the equipment rack, sets firmly the footstock in equipment rack upper end through the stand to and install two stamping mechanism on the footstock, includes:

station switching component: a rotary seat is movably arranged between the equipment frame and the top seat, a second telescopic mechanism is arranged at the upper end of the top seat, the free end of the second telescopic mechanism is rotationally connected with the rotary seat, and a driving piece for driving the rotary seat to rotate is arranged on the equipment frame;

the outer side of the rotary seat is provided with three square frames which are distributed in an annular mode, the outer end of the rotary seat is fixedly provided with a corresponding square frame side connecting frame, the side connecting frame is fixedly provided with a support arm through a transverse sleeve, and the support arm is rotationally connected with the square frames;

a turnover component: the inside of the rotary seat is connected with a sliding block corresponding to the square frame in a sliding manner, the equipment frame is provided with a guide piece, the sliding block slides along the rotary seat under the action of the guide piece when the rotary seat rotates, the rotary seat is provided with a transmission piece, and the sliding block drives the square frame to turn along the support arm through the transmission piece when sliding along the rotary seat;

clamping component: the inner side of the square frame is provided with a clamp for clamping a metal workpiece in a sliding manner, the outer side of the square frame is provided with a transverse frame in a sliding manner, the inner end of the transverse frame is fixedly provided with an inserting shaft penetrating through the square frame, and the inserting shaft is rotationally connected with the clamp;

the bottom rotation of seat soon is connected with the capstan, be provided with the rotatory traction element of control capstan on the seat soon, be provided with the interlock spare on the seat soon, the capstan is through the synchronous removal of interlock spare control two crossbearers when rotating.

Preferably, a supporting rod is fixedly arranged at the outer end of the clamp, and a sleeve matched with the supporting rod for sliding insertion is fixedly arranged at the inner end of the square frame.

Preferably, the bottom of rotating the seat has set firmly the spliced pole, the driving piece is including rotating the sleeve of connecting in equipment rack bottom, and the spliced pole slides and inlay and establish in telescopic inside, be formed with bar tooth on the telescopic inner wall, be formed with the gliding recess of cooperation bar tooth on the lateral wall of spliced pole, telescopic outer end has set firmly the ring gear, the bottom rotation of equipment rack is connected with the gear of cooperation ring gear meshing, install control gear pivoted driving motor on the equipment rack.

Preferably, the guide piece includes the side frame of stretching that sets firmly in slider side, the bottom that the side stretched the frame has set firmly the montant, the outside slip cap of montant is equipped with the sliding sleeve, the outside cover of montant is equipped with the compression spring of downward action sliding sleeve.

Preferably, the equipment rack is provided with an outer slide way and an inner slide way which are matched with the sliding sleeve to slide, and two linear slide ways which are communicated with the front end and the tail end of the outer slide way and the inner slide way.

Preferably, the transmission piece comprises a transverse shaft which is rotationally connected in the side joint frame, a transmission arm is coaxially and fixedly arranged at the outer end of the transverse shaft, the free end of the transmission arm is rotationally connected with the sliding block, a wheel chain assembly is arranged outside the supporting arm, and the transverse shaft drives the square frame to synchronously rotate with the square frame through the wheel chain assembly.

Preferably, the inside rotation of support arm is connected with the driven cover coaxial fixed with square frame, the wheel chain subassembly is including rotating the rim plate of connecting in the support arm outside and coaxial fixed with the cross axle, the rim plate is equipped with the chain of cooperation transmission with driven cover's outside cover.

Preferably, the side end of the rotary disc is fixedly provided with a frame plate, the pulling piece comprises a first telescopic mechanism rotatably arranged on the side part of the rotary seat, and the free end of the first telescopic mechanism is rotatably connected with the frame plate.

Preferably, the linkage piece comprises two bending frames which are arranged on the inner side of the support arm in a sliding manner, a cross rod which penetrates through the support arm is fixedly arranged between the bending frames and the transverse frame, a sliding plate is arranged on the side part of the rotary seat in a sliding manner, a lug is fixedly arranged on the bottom of the bending frame, and an inclined groove matched with the lug to slide is formed in the sliding plate.

Preferably, the bottom sliding connection of seat soon has three slip frame, set firmly between slip frame and the slide and run through the hack lever that stretches the frame to the side, be formed with the gliding spout of cooperation hack lever in the side stretching the frame, the bottom of slip frame has set firmly the guide arm, be formed with the gliding bar slot of cooperation guide arm in the capstan.

In summary, due to the adoption of the technical scheme, the beneficial effects of the application are as follows:

1. according to the application, the three square frames are arranged along the annular shape of the rotary seat, so that the stations of the metal workpiece are switched along with the rotation of the rotary seat, after the metal workpiece is punched and formed, the stations of the metal workpiece are switched along with the rotation of the rotary seat, the square frames are turned one hundred eighty degrees along the support arm under the action of the transmission part, and the automatic turning of the punching surface in the process of the station switching of the metal workpiece is realized, so that the punching forming efficiency of the metal workpiece is improved.

2. According to the application, the rotation of the rotary disc is controlled by the first telescopic machine, so that the synchronous control of the tensioning of a plurality of groups of clamps distributed on the outer side of the rotary seat in an annular mode can be realized, and the positions of the three square frames are simultaneously switched by the arrangement of the second telescopic mechanism and the driving motor, so that the investment and the use cost of the stamping device are reduced.

Drawings

Fig. 1 shows a perspective view of a stamping device provided according to an embodiment of the present application;

FIG. 2 shows a schematic top view of a spin stand provided in accordance with an embodiment of the present application;

FIG. 3 shows a cross-sectional view of a swivel provided in accordance with an embodiment of the application;

FIG. 4 illustrates a top-down view of a square frame provided in accordance with an embodiment of the present application;

fig. 5 shows a schematic structural view of an upper end face of an equipment rack according to an embodiment of the present application;

FIG. 6 illustrates a bottom view of a swivel base provided in accordance with an embodiment of the application;

fig. 7 shows a schematic diagram of a fitting structure of a sleeve and a shaft post according to an embodiment of the present application.

Legend description:

1. an equipment rack; 101. an outer slide; 102. an inner slide; 103. a linear slideway; 2. a rotary seat; 3. a side connecting frame; 4. a support arm; 5. a transverse sleeve; 6. a square frame; 7. a driven sleeve; 8. a horizontal axis; 9. a wheel disc; 10. a chain; 11. a cross frame; 12. inserting a shaft; 13. a clamp; 14. a support rod; 15. a sleeve; 16. a slide block; 17. a transmission arm; 18. a side extension frame; 1801. a chute; 19. a vertical rod; 20. a sliding sleeve; 21. a compression spring; 22. a slide plate; 2201. an inclined groove; 23. a hack lever; 24. a bending frame; 25. a cross bar; 26. a bump; 27. a sliding connection frame; 28. a guide rod; 29. a rotating disc; 2901. a bar-shaped groove; 30. a frame plate; 31. a first telescopic mechanism; 32. a shaft post; 3201. a groove; 33. a sleeve; 3301. bar-shaped teeth; 34. a toothed ring; 35. a gear; 36. a driving motor; 37. a top base; 38. a second telescopic mechanism; 39. a punching mechanism; 40. and (5) a die holder.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Referring to fig. 1-7, the present application provides a technical solution: the utility model provides a stamping device of metal work piece, includes equipment rack 1, sets firmly two die holders 40 on equipment rack 1, sets firmly the footstock 37 in equipment rack 1 upper end through the stand to and install two stamping mechanism 39 on footstock 37, includes:

station switching component: a rotary seat 2 is movably arranged between the equipment frame 1 and the top seat 37, a second telescopic mechanism 38 is arranged at the upper end of the top seat 37, the free end of the second telescopic mechanism 38 is rotationally connected with the rotary seat 2, and a driving piece for driving the rotary seat 2 to rotate is arranged on the equipment frame 1; the second telescoping mechanism 38 adopts the existing pneumatic or hydraulic transmission telescoping mode; the second telescopic mechanism 38 is controlled to drive the rotary seat 2 to move along the vertical direction, so that the metal workpiece positioned on the inner side of the square frame 6 is driven to be connected with or separated from the corresponding die holder 40, and the subsequent switching of the rotary seat 2 to the metal workpiece station is met.

The outer side of the rotary seat 2 is provided with three square frames 6 which are distributed in an annular shape, the outer end of the rotary seat 2 is fixedly provided with a side joint frame 3 corresponding to the square frames 6, the side joint frame 3 is fixedly provided with a support arm 4 through a transverse sleeve 5, and the support arm 4 is rotationally connected with the square frames 6; the metal workpiece is clamped on the inner side of the square frame 6, and the position of the square frame 6 is switched to realize the switching of the work stations of the metal workpiece.

A turnover component: the inside of the rotary seat 2 is connected with a sliding block 16 corresponding to the square frame 6 in a sliding way, a guide piece is arranged on the equipment frame 1, when the rotary seat 2 rotates, the sliding block 16 slides along the rotary seat 2 under the action of the guide piece, a transmission piece is arranged on the rotary seat 2, and when the sliding block 16 slides along the rotary seat 2, the square frame 6 is driven to turn along the support arm 4 through the transmission piece; after the metal piece is stamped and formed, the station of the metal piece is switched along with the rotation of the rotary seat 2, the sliding block 16 radially slides along the opposite rotary seat 2 under the action of the guide piece, at this time, the square frame 6 overturns one hundred eighty degrees along the support arm 4 under the action of the transmission piece, so that the turnover switching of the stamping end face of the workpiece is realized, and the double-sided stamping efficiency of the metal piece is improved.

Clamping component: the inner side of the square frame 6 is provided with a clamp 13 for clamping a metal workpiece in a sliding manner, the outer side of the square frame 6 is provided with a transverse frame 11 in a sliding manner, the inner end of the transverse frame 11 is fixedly provided with an inserting shaft 12 penetrating through the square frame 6, and the inserting shaft 12 is rotationally connected with the clamp 13; when the metal workpiece is turned over, the clamp 13 rotates along the inserting shaft 12 along with the turning over of the square frame 6, so that the clamp 13 always keeps a clamping state on the metal workpiece in the turning over process, and the safe conveying of the metal workpiece is ensured.

The bottom of the rotary seat 2 is rotationally connected with a rotary disc 29, a traction piece for controlling the rotary disc 29 to rotate is arranged on the rotary seat 2, a linkage piece is arranged on the rotary seat 2, and the rotary disc 29 controls the two cross frames 11 to synchronously move through the linkage piece when rotating; the rotating disc 29 is controlled to rotate through the pulling piece, so that the transverse frame 11 transversely moves relative to the square frame 6 under the action of the pulling piece, the clamping or loosening of the metal workpiece positioned on the inner side of the square frame 6 is realized through the clamp 13 connected with the transverse frame 11 through the inserting shaft 12, and the synchronous control of tensioning of a plurality of groups of clamps 13 distributed on the outer side of the rotating seat 2 in an annular mode can be realized only through the rotation of the rotating disc 29, so that the investment and the use cost of the stamping device are reduced.

Specifically, as shown in fig. 1, 2, 3, 4 and 6, a supporting rod 14 is fixedly arranged at the outer end of the clamp 13, and a sleeve 15 matched with the supporting rod 14 and inserted in a sliding manner is fixedly arranged at the inner end of the square frame 6; when the clamp 13 slides relative to the square frame 6, the support rod 14 fixed at the outer end of the clamp 13 slides along the sleeve 15, and the clamp 13 can synchronously turn over along with the square frame 6 through the sliding connection of the support rod 14 and the sleeve 15.

Specifically, as shown in fig. 5-7, the bottom of the rotary seat 2 is fixedly provided with a shaft post 32, the driving piece comprises a sleeve 33 rotatably connected to the bottom of the equipment rack 1, the shaft post 32 is slidably embedded in the sleeve 33, a strip-shaped tooth 3301 is formed on the inner wall of the sleeve 33, a groove 3201 matched with the strip-shaped tooth 3301 to slide is formed on the side wall of the shaft post 32, the outer end of the sleeve 33 is fixedly provided with a toothed ring 34, the bottom of the equipment rack 1 is rotatably connected with a gear 35 meshed with the toothed ring 34, and a driving motor 36 for controlling the gear 35 to rotate is arranged on the equipment rack 1; the driving motor 36 is started to control the gear 35 to rotate, so that the toothed ring 34 meshed with the gear 35 drives the sleeve 33 to synchronously rotate, and at the moment, the strip-shaped teeth 3301 fixed on the inner wall of the sleeve 33 drive the rotary seat 2 coaxially fixed with the shaft post 32 to rotate through the action groove 3201, so that the switching of the work stations of the metal workpiece is realized.

Specifically, as shown in fig. 3, 5 and 6, the guide member includes a side extension frame 18 fixedly arranged at a side end of the slider 16, a vertical rod 19 is fixedly arranged at the bottom of the side extension frame 18, a sliding sleeve 20 is sleeved on the outer side of the vertical rod 19 in a sliding manner, and a compression spring 21 which acts on the sliding sleeve 20 downwards is sleeved on the outer side of the vertical rod 19; the sliding sleeve 20 is driven to slide against the upper end surfaces of the outer slide rail 101, the inner slide rail 102 and the linear slide rail 103 by the action of the compression spring 21 on the sliding sleeve 20.

The equipment rack 1 is provided with an outer slide way 101 and an inner slide way 102 which are matched with the sliding sleeve 20 to slide, and two linear slide ways 103 which are communicated with the front end and the tail end of the outer slide way 101 and the inner slide way 102; when the rotary seat 2 rotates along the equipment rack 1, the sliding sleeve 20 slides along the upper end surface of the equipment rack 1 under the drive of the vertical rod 19, and when the sliding sleeve 20 slides along the outer slide way 101 or the inner slide way 102, the sliding block 16 fixed with the side extension frame 18 keeps a static state relative to the rotary seat 2, and the square frame 6 can not turn over; when the sliding sleeve 20 slides along the linear slideway 103, the radial distance between the sliding sleeve 20 and the rotary seat 2 changes, and at the moment, the sliding block 16 moves radially relative to the rotary seat 2 under the action of the side extension frame 18.

Specifically, as shown in fig. 1-4, the transmission member comprises a transverse shaft 8 rotatably connected in the side frame 3, a transmission arm 17 is coaxially and fixedly arranged at the outer end of the transverse shaft 8, the free end of the transmission arm 17 is rotatably connected with a sliding block 16, a wheel chain assembly is arranged outside the supporting arm 4, and the transverse shaft 8 drives the square frame 6 to synchronously rotate with the square frame through the wheel chain assembly; the transmission arm 17 is rotatably connected by two groups of arm bars with equal length, one arm bar is coaxially fixed with the transverse shaft 8, the other arm bar is rotatably connected with the sliding block 16, and when the sliding block 16 moves radially relative to the rotary seat 2, the transverse shaft 8 rotates under the action of the transmission arm 17.

The inside of the support arm 4 is rotatably connected with a driven sleeve 7 coaxially fixed with the square frame 6, the wheel chain assembly comprises a wheel disc 9 rotatably connected to the outer side of the support arm 4 and coaxially fixed with the transverse shaft 8, and a chain 10 matched with transmission is sleeved on the outer sides of the wheel disc 9 and the driven sleeve 7; when the wheel disc 9 rotates along with the transverse shaft 8, the driven sleeve 7 drives the square frame 6 to turn over under the action of the chain 10.

Specifically, as shown in fig. 1, 3 and 6, a frame plate 30 is fixed at the side end of the rotary disk 29, and the pulling element includes a first telescopic mechanism 31 rotatably mounted at the side of the rotary seat 2, and the free end of the first telescopic mechanism 31 is rotatably connected with the frame plate 30; the first telescopic mechanism 31 adopts the existing pneumatic or hydraulic transmission telescopic mode, and drives the rotary disk 29 fixed with the frame plate 30 to rotate by controlling the telescopic state of the first telescopic mechanism 31; a storage battery matched with the first telescopic mechanism 31 for supplying power is arranged in the rotary seat 2.

The linkage piece comprises two bending frames 24 which are arranged on the inner side of the support arm 4 in a sliding manner, a cross rod 25 which penetrates through the support arm 4 is fixedly arranged between the bending frames 24 and the transverse frame 11, a sliding plate 22 is arranged on the side part of the rotary seat 2 in a sliding manner, a lug 26 is fixedly arranged at the bottom of the bending frame 24, and an inclined groove 2201 which is matched with the lug 26 in a sliding manner is formed in the sliding plate 22; when the sliding plate 22 moves radially relative to the rotary seat 2 under the action of the frame rod 23, the inclined grooves 2201 drive the two bending frames 24 to drive the transverse frame 11 to move transversely relative to the square frame 6 through the transverse rod 25 under the action of the pressing action on the convex blocks 26, so that the clamping state of the clamp 13 on the metal workpiece is controlled.

Three sliding connection frames 27 are connected to the bottom of the rotary seat 2 in a sliding manner, a hack lever 23 penetrating through the side extension frame 18 is fixedly arranged between the sliding connection frames 27 and the sliding plate 22, a sliding groove 1801 matched with the hack lever 23 in sliding manner is formed in the side extension frame 18, a guide rod 28 is fixedly arranged at the bottom of the sliding connection frames 27, and a strip-shaped groove 2901 matched with the guide rod 28 in sliding manner is formed in the rotary disc 29; when the rotary plate 29 rotates, the bar-shaped groove 2901 drives the sliding frame 27 to move radially relative to the rotary seat 2 under the pressing action of the guide rod 28, and the hack lever 23 fixed with the sliding frame 27 drives the sliding plate 22 to move synchronously.

The previous description of the embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a stamping device of metal work piece, includes equipment rack (1), sets firmly two die holders (40) on equipment rack (1), sets firmly footstock (37) in equipment rack (1) upper end through the stand to and install two stamping mechanism (39) on footstock (37), its characterized in that includes:

station switching component: a rotary seat (2) is movably arranged between the equipment frame (1) and the top seat (37), a second telescopic mechanism (38) is arranged at the upper end of the top seat (37), the free end of the second telescopic mechanism (38) is rotationally connected with the rotary seat (2), and a driving piece for driving the rotary seat (2) to rotate is arranged on the equipment frame (1);

three square frames (6) which are annularly distributed are arranged on the outer side of the rotary seat (2), a side connecting frame (3) corresponding to the square frames (6) is fixedly arranged at the outer end of the rotary seat (2), a support arm (4) is fixedly arranged on the side connecting frame (3) through a transverse sleeve (5), and the support arm (4) is rotationally connected with the square frames (6);

a turnover component: the inside of the rotary seat (2) is connected with a sliding block (16) corresponding to the square frame (6) in a sliding manner, the equipment frame (1) is provided with a guide piece, when the rotary seat (2) rotates, the sliding block (16) slides along the rotary seat (2) under the action of the guide piece, the rotary seat (2) is provided with a transmission piece, and when the sliding block (16) slides along the rotary seat (2), the square frame (6) is driven to turn along the support arm (4) through the transmission piece;

clamping component: the inner side of the square frame (6) is provided with a clamp (13) for clamping a metal workpiece in a sliding manner, the outer side of the square frame (6) is provided with a transverse frame (11) in a sliding manner, the inner end of the transverse frame (11) is fixedly provided with an inserting shaft (12) penetrating through the square frame (6), and the inserting shaft (12) is rotationally connected with the clamp (13);

the rotary seat is characterized in that a rotary disc (29) is rotatably connected to the bottom of the rotary seat (2), a traction piece for controlling the rotary disc (29) to rotate is arranged on the rotary seat (2), a linkage piece is arranged on the rotary seat (2), and the rotary disc (29) controls the two transverse frames (11) to synchronously move through the linkage piece during rotation.

2. The stamping device for metal workpieces according to claim 1, wherein a supporting rod (14) is fixedly arranged at the outer end of the clamp (13), and a sleeve (15) matched with the supporting rod (14) in a sliding insertion manner is fixedly arranged at the inner end of the square frame (6).

3. The stamping device for metal workpieces according to claim 1, characterized in that a shaft post (32) is fixedly arranged at the bottom of the rotary seat (2), the driving piece comprises a sleeve (33) rotationally connected to the bottom of the equipment rack (1), the shaft post (32) is slidably embedded in the sleeve (33), strip-shaped teeth (3301) are formed on the inner wall of the sleeve (33), grooves (3201) matched with the strip-shaped teeth (3301) in a sliding mode are formed on the side wall of the shaft post (32), a toothed ring (34) is fixedly arranged at the outer end of the sleeve (33), a gear (35) meshed with the toothed ring (34) is rotationally connected to the bottom of the equipment rack (1), and a driving motor (36) for controlling the gear (35) to rotate is mounted on the equipment rack (1).

4. The stamping device for metal workpieces according to claim 1, wherein the guide member comprises a side extension frame (18) fixedly arranged at the side end of the sliding block (16), a vertical rod (19) is fixedly arranged at the bottom of the side extension frame (18), a sliding sleeve (20) is sleeved on the outer side of the vertical rod (19) in a sliding manner, and a compression spring (21) which acts on the sliding sleeve (20) downwards is sleeved on the outer side of the vertical rod (19).

5. The stamping device for metal workpieces according to claim 4, wherein the equipment rack (1) is provided with an outer slide (101) which is matched with the sliding sleeve (20) to slide, an inner slide (102) and two linear slides (103) which are communicated with the outer slide (101) and the inner slide (102) from the beginning to the end.

6. The stamping device for metal workpieces according to claim 1, wherein the transmission piece comprises a transverse shaft (8) rotatably connected in the side frame (3), a transmission arm (17) is coaxially and fixedly arranged at the outer end of the transverse shaft (8), the free end of the transmission arm (17) is rotatably connected with the sliding block (16), a wheel chain assembly is arranged outside the supporting arm (4), and the transverse shaft (8) drives the square frame (6) to synchronously rotate with the square frame through the wheel chain assembly.

7. The stamping device for metal workpieces according to claim 6, wherein a driven sleeve (7) coaxially fixed with the square frame (6) is rotatably connected inside the support arm (4), the wheel chain assembly comprises a wheel disc (9) rotatably connected to the outer side of the support arm (4) and coaxially fixed with the transverse shaft (8), and a chain (10) matched with transmission is sleeved on the outer side of the wheel disc (9) and the driven sleeve (7).

8. The stamping device for metal workpieces according to claim 1, characterized in that a frame plate (30) is fixedly arranged at the side end of the rotary disc (29), the pulling piece comprises a first telescopic mechanism (31) rotatably arranged at the side part of the rotary seat (2), and the free end of the first telescopic mechanism (31) is rotatably connected with the frame plate (30).

9. The stamping device for metal workpieces according to claim 8, wherein the linkage piece comprises two bending frames (24) which are arranged on the inner side of the support arm (4) in a sliding mode, a cross rod (25) penetrating through the support arm (4) is fixedly arranged between the bending frames (24) and the transverse frame (11), a sliding plate (22) is arranged on the side portion of the rotary seat (2) in a sliding mode, a protruding block (26) is fixedly arranged on the bottom portion of the bending frames (24), and an inclined groove (2201) matched with the protruding block (26) in a sliding mode is formed in the sliding plate (22).

10. The stamping device for metal workpieces according to claim 9, characterized in that the bottom of the rotary seat (2) is slidably connected with three sliding connection frames (27), a hack lever (23) penetrating through the side extension frame (18) is fixedly arranged between the sliding connection frames (27) and the sliding plate (22), a sliding chute (1801) matched with the hack lever (23) to slide is formed in the side extension frame (18), a guide rod (28) is fixedly arranged at the bottom of the sliding connection frames (27), and a strip-shaped groove (2901) matched with the guide rod (28) to slide is formed in the rotary disc (29).