Punching machine with protective device

Abstract

The utility model relates to the technical field of punching machines, and discloses a punching machine with a protective device, which comprises a base, four fixing columns are fixedly connected to the upper surface of the base, a fixing frame is fixedly connected to the upper ends of the four fixing columns, a hydraulic rod is fixedly connected inside the fixing frame, a punching plate is fixedly connected to the telescopic end of the hydraulic rod, and the punching plate is in sliding connection with the fixing columns. The lower surface of the stamping plate is fixedly connected with an upper template, the upper surface of the base is fixedly connected with a lower template, a lifting frame is slidably connected into the base, the upper surface of the lifting frame is provided with a blocking plate, the lower surface of the stamping plate is fixedly connected with a sliding plate, and the lower end of the sliding plate is slidably connected with the base. And when the stamping plate descends, the blocking plate ascends from the three side faces of the base at the same time to isolate a stamping area, so that metal chippings splashed in the stamping process are blocked by the blocking plate and the sliding plate and limited in the device, harm of the splashed chippings to workers is reduced, and the problem of accidental injuries caused when workpieces are manually replaced is solved.

Description

Technical Field

[0001] This utility model relates to the field of punch press technology, specifically to a punch press with a protective device. Background Technology

[0002] A punch press is a stamping press. In national production, stamping technology has become increasingly widely used due to its advantages over traditional machining, such as saving materials and energy, high efficiency, low operator skill requirements, and the ability to produce products that cannot be achieved through machining by using various molds.

[0003] A convenient four-column universal hydraulic press is mentioned in an existing Chinese patent (authorization announcement number: CN221362171U). It includes a base, four guide columns fixedly connected to the upper surface of the base, a top fixing frame fixedly connected to the top of the four guide columns, a hydraulic telescopic rod provided on the lower surface of the top fixing frame, a stamping movable plate fixedly connected to the bottom end of the hydraulic telescopic rod, a mounting groove opened on the back of the base, an adjusting motor fixedly connected to the inner wall of the mounting groove, and a strip-shaped adjusting groove opened on the upper surface of the base. This utility model, by providing a movable support seat on the surface of the base of the four-column hydraulic press, allows the movable support seat to move horizontally on the base surface using the adjusting motor during use, thereby facilitating quick adjustment of the workpiece position by the operator and enabling stamping processing at different positions on the workpiece surface.

[0004] Existing punch presses require manual placement of the workpiece on a template before a hydraulic rod drives the stamping plate to press the workpiece. The workpiece is then removed and replaced manually. However, existing devices cannot block the stamping area during the stamping process and lack warning functions for workers. This poses significant safety hazards during stamping operations, as flying metal fragments and deformed workpieces can easily injure workers' arms. Utility Model Content

[0005] The purpose of this application is to provide a punch press with a protective device to solve the problem that existing devices cannot block the stamping area during the stamping process and lack the function of manual warning.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution:

[0007] A punch press with a protective device includes a base. Four fixed columns are fixedly connected to the upper surface of the base. A fixed frame is fixedly connected to the upper end of the four fixed columns. A hydraulic rod is fixedly connected inside the fixed frame. A punch plate is fixedly connected to the telescopic end of the hydraulic rod. The punch plate is slidably connected to the fixed columns. An upper template is fixedly connected to the lower surface of the punch plate. A lower template is fixedly connected to the upper surface of the base. A lifting frame is slidably connected inside the base. A baffle plate is installed on the upper surface of the lifting frame. A sliding plate is fixedly connected to the lower surface of the punch plate. The lower end of the sliding plate is slidably connected to the base. A protective structure is provided inside the base.

[0008] By adopting the above technical solution, when using this device to stamp a workpiece, the workpiece is first placed on the lower template, and then the hydraulic rod is activated to move the stamping plate to the lower template. During the downward movement of the stamping plate, the upper template is driven to squeeze the workpiece. The upper and lower templates squeeze the workpiece from both sides, stamping it into a suitable shape. When the stamping plate descends, the baffle plate rises simultaneously from three sides of the base to isolate the stamping area. The baffle plate blocks the operator, indicating that the device is stamping. At the same time, as the stamping process proceeds, the stamping plate also drives the sliding plate to insert into the base. This prevents metal fragments that splash during the stamping process from being blocked by the baffle plate and the sliding plate, confining them inside the device and reducing the risk of injury to the operator from splashed fragments. This device can fully protect the operator during the stamping process and reduces the risk of accidental injury when changing workpieces.

[0009] Furthermore, the protective structure includes a lifting screw rotatably connected inside the base, the outer surface of the lifting screw being threadedly connected to the lifting frame, and a lifting column fixedly connected inside the base, the outer surface of the lifting column being slidably connected to the lifting frame.

[0010] By adopting the above technical solution, the rotation of the lifting screw further drives the lifting frame to move upward. During the process of the lifting frame rising, it is guided by the lifting column, making the rise of the lifting frame more stable, and driving the baffle plate to rise as the lifting frame rises.

[0011] Furthermore, a lifting column is slidably connected to the upper surface of the lifting frame, the upper end of the lifting column is fixedly connected to the baffle plate, and a spring is sleeved on the outside of the lifting column, with both ends of the spring fixedly connected to the baffle plate and the lifting frame, respectively.

[0012] By adopting the above technical solution, when a worker changes a workpiece using an arm, the rising baffle plate will first come into contact with the worker's arm. At this time, the baffle plate stops rising due to the arm, and at the same time, the baffle plate presses down on the lifting column, causing the lifting column to slide inside the lifting frame. At this time, the spring is compressed by the baffle plate and the lifting frame, which causes the spring to continuously provide a restoring thrust to push the baffle plate upward, allowing the baffle plate to drive the arc plate upward, and then the arc plate pushes the worker's arm, reminding the worker that the stamping work is about to begin.

[0013] Furthermore, a rotating column is rotatably connected to the upper end of the blocking plate, an arc-shaped plate is fixedly connected to the outer surface of the rotating column, and a torsion spring is sleeved on the outer side of the rotating column. The two ends of the torsion spring are fixedly connected to the blocking plate and the arc-shaped plate, respectively.

[0014] By adopting the above technical solution, when the blocking plate rises to its limit, the arc plate is also driven by the blocking plate to rise into the arc groove. At this time, the arc plate entering the arc groove is squeezed and adheres to the inner wall of the arc groove. When the arc groove squeezes the arc plate, it causes the arc plate to rotate. The rotation of the arc plate drives the torsion spring to contract. At this time, the torsion spring continuously provides the torque for reset, allowing the arc plate to fit tightly in the arc groove.

[0015] Furthermore, a sponge board is fixedly connected to the upper surface of the arc-shaped plate, and an arc-shaped groove is formed on the lower surface of the stamping plate, the arc-shaped groove being adapted to the shape of the arc-shaped plate.

[0016] By adopting the above technical solution, the setting of the arc-shaped plate and its upper sponge plate makes it less likely for the operator to be pinched when reminded by the blocking plate, and also makes the blocking plate more tightly cover the gap between the stamping plate and the base.

[0017] Furthermore, a bevel gear is fixedly connected to the upper end of the lifting screw, a connecting column is rotatably connected inside the base, a bevel gear is fixedly connected to one end of the connecting column, the outer surface of the bevel gear and the bevel gear mesh with each other, a connecting gear is fixedly connected to the other end of the connecting column through the base, and a rack plate is fixedly connected to one side of the stamping plate, the rack plate meshing with the connecting gear on one side.

[0018] By adopting the above technical solution, the rotation of the connecting gear drives the connecting column to rotate, the rotation of the connecting column causes the second bevel gear to rotate, the rotation of the second bevel gear drives the first bevel gear to rotate, and the rotation of the first bevel gear drives the lifting screw to rotate.

[0019] Furthermore, a sliding column is fixedly connected to one side of the base, and a sliding groove is provided inside the rack plate, with the sliding groove slidably connected to the sliding column.

[0020] By adopting the above technical solution, when the stamping plate descends, it drives the rack plate to move towards the base. When the rack plate moves, the sliding groove slides along the sliding column to limit the movement of the rack plate.

[0021] Furthermore, a drive motor is fixedly connected to the outer side of the lower template, and a bidirectional screw is fixedly connected to the output end of the drive motor through the lower template. The bidirectional screw is rotatably connected to the lower template, and side plates are threaded to both ends of the bidirectional screw.

[0022] By adopting the above technical solution, when it is necessary to remove the stamped workpiece, the drive motor is started to drive the bidirectional screw to rotate. Since the bidirectional screw is rotatably connected to the lower template and both ends of the bidirectional screw are threaded with side plates, during the rotation of the bidirectional screw, the two side plates will move in opposite directions along the axis of the bidirectional screw. When the side plates move in opposite directions, the distance between them increases, which can release the workpiece and make it easier to remove the workpiece manually. This design not only simplifies the workpiece removal process and improves work efficiency, but also ensures the safety of operation.

[0023] In summary, this application includes at least one of the following beneficial effects;

[0024] 1. In this application, when the device performs stamping processing on the workpiece, the stamping plate will drive the blocking plate to rise from three sides of the base when it descends. When the operator changes the workpiece by arm, the rising arc plate will first touch the operator's arm to remind the operator that the stamping work is about to start. This not only leaves room for the operator to operate, but also automatically raises the blocking plate to shield the stamping area, making the stamping process safer.

[0025] 2. In this application, when it is necessary to remove the stamped workpiece, the drive motor is started to drive the bidirectional screw to rotate. The two side plates will move in opposite directions along the axis of the bidirectional screw to release the workpiece, making it easier for the workpiece to be removed manually. This design not only simplifies the workpiece removal process and improves work efficiency, but also ensures the safety of operation. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a punch press with a protective device according to this application;

[0027] Figure 2 This is a schematic diagram of the interior of the base of a punch press with a protective device according to this application;

[0028] Figure 3 This is a partial sectional view of the base of a punch press with a protective device according to this application;

[0029] Figure 4 This is a rear view of a punch press with a protective device according to this application;

[0030] Figure 5 It is in this application Figure 1 Enlarged view of point A in the middle;

[0031] Figure 6 It is in this application Figure 1 Enlarged diagram of point B in the middle.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Base; 2. Fixed column; 3. Fixed frame; 4. Hydraulic rod; 5. Stamping plate; 6. Lower template; 7. Baffle plate; 8. Lifting frame; 9. Arc plate; 10. Sponge board; 11. Drive motor; 12. Side plate; 13. Double-acting screw; 14. Lifting screw; 15. Bevel gear one; 16. Bevel gear two; 17. Connecting column; 18. Connecting gear; 19. Rack plate; 20. Arc groove; 21. Upper template; 22. Sliding column; 23. Lifting column; 24. Sliding plate; 25. Lifting column; 26. Spring; 27. Rotating column; 28. Torsion spring. Detailed Implementation

[0034] The following will be based on the embodiments of this utility model. Figures 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] Reference Figure 1 and Figure 3 This utility model provides a technical solution: a punch press with a protective device, including a base 1, four fixed columns 2 fixedly connected to the upper surface of the base 1, a fixed frame 3 fixedly connected to the upper end of the four fixed columns 2, a hydraulic rod 4 fixedly connected inside the fixed frame 3, a punching plate 5 fixedly connected to the telescopic end of the hydraulic rod 4, the punching plate 5 being slidably connected to the fixed columns 2, an upper template 21 fixedly connected to the lower surface of the punching plate 5, a lower template 6 fixedly connected to the upper surface of the base 1, a lifting frame 8 slidably connected inside the base 1, a blocking plate 7 installed on the upper surface of the lifting frame 8, a sliding plate 24 fixedly connected to the lower surface of the punching plate 5, the lower end of the sliding plate 24 being slidably connected to the base 1, and a protective structure provided inside the base 1.

[0036] When using this device to stamp a workpiece, the workpiece is first placed on the lower template 6. Then, the hydraulic rod 4 is activated to move the stamping plate 5 to the lower template 6. As the stamping plate 5 moves downward, it drives the upper template 21 to squeeze the workpiece. The upper template 21 and the lower template 6 squeeze the workpiece from both sides, stamping it into a suitable shape. When the stamping plate 5 descends, the baffle plate 7 rises simultaneously from three sides of the base 1 to isolate the stamping area. The baffle plate 7 also blocks the operator, indicating that the device is stamping. At the same time, as the stamping process proceeds, the stamping plate 5 also drives the sliding plate 24 to insert into the base 1. This prevents metal debris from splashing during the stamping process from being blocked by the baffle plate 7 and the sliding plate 24, confining it inside the device and reducing the risk of injury to the operator from the splashing debris. This device can fully protect the operator during the stamping process and reduces the risk of accidental injury when changing workpieces.

[0037] Reference Figure 1 and Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 The protective structure includes a lifting screw 14 rotatably connected inside the base 1, with its outer surface threaded to the lifting frame 8. A lifting column 23 is fixedly connected inside the base 1, and its outer surface is slidably connected to the lifting frame 8. A lifting column 25 is slidably connected to the upper surface of the lifting frame 8, with its upper end fixedly connected to a baffle plate 7. A spring 26 is sleeved on the outer side of the lifting column 25, with both ends of the spring 26 fixedly connected to the baffle plate 7 and the lifting frame 8, respectively. A rotating column 27 is rotatably connected to the upper end of the baffle plate 7, with an arc-shaped plate 9 fixedly connected to its outer surface. A torsion spring 28 is sleeved on the outer side of the rotating column 27, with both ends of the torsion spring 28 fixedly connected to the baffle plate 7 and the arc-shaped plate 9, respectively. A sponge plate 10 is fixedly connected to the upper surface of the arc-shaped plate 9, and an arc-shaped groove 20 is formed on the lower surface of the stamping plate 5, the arc-shaped groove 20 matching the shape of the arc-shaped plate 9.

[0038] A bevel gear 15 is fixedly connected to the upper end of the lifting screw 14. A connecting column 17 is rotatably connected inside the base 1. A bevel gear 16 is fixedly connected to one end of the connecting column 17. The outer surface of the bevel gear 15 meshes with the bevel gear 16. The other end of the connecting column 17 passes through the base 1 and is fixedly connected to a connecting gear 18. A rack plate 19 is fixedly connected to one side of the stamping plate 5. One side of the rack plate 19 meshes with the connecting gear 18. A sliding column 22 is fixedly connected to one side of the base 1. A sliding groove is opened inside the rack plate 19, and the sliding groove is slidably connected to the sliding column 22.

[0039] When the stamping plate 5 descends, it drives the rack plate 19 to move towards the base 1. As the rack plate 19 moves, the sliding groove slides along the sliding column 22, limiting the movement of the rack plate 19. When the rack plate 19 moves, it drives the connecting gear 18 to rotate. The rotation of the connecting gear 18 drives the connecting column 17 to rotate. The rotation of the connecting column 17 causes the second bevel gear 16 to rotate. The rotation of the second bevel gear 16 drives the first bevel gear 15 to rotate. The rotation of the first bevel gear 15 drives the lifting screw 14 to rotate. The rotation of the lifting screw 14 further drives the lifting frame 8 to move towards... The lifting frame 8 moves upward and is guided by the lifting column 23 during its ascent, making the ascent of the lifting frame 8 more stable. When the lifting frame 8 rises, it drives the blocking plate 7 to rise as well. When the stamping plate 5 completes the stamping action and begins to rise, the rack plate 19 also moves in the opposite direction, and the connecting gear 18 rotates in the opposite direction. Through the transmission of the bevel gear, the lifting screw 14 rotates in the opposite direction, driving the lifting frame 8 to descend smoothly, so that the blocking plate 7 descends. This allows the device to automatically raise the blocking plate 7 to shield the stamping area during stamping, making the stamping process safer.

[0040] When the baffle plate 7 rises, it will cause the arc-shaped plate 9 at its upper end to rise as well. When the operator changes the workpiece by using their arm, the rising arc-shaped plate 9 will first come into contact with the operator's arm. At this time, the arc-shaped plate 9 and the baffle plate 7 stop rising due to the arm's obstruction. Simultaneously, the baffle plate 7 presses down on the lifting column 25, causing the lifting column 25 to slide inside the lifting frame 8. At this time, the spring 26 is compressed by the baffle plate 7 and the lifting frame 8, causing the spring 26 to continuously provide a restoring thrust to push the baffle plate 7 upward. This allows the baffle plate 7 to drive the arc-shaped plate 9 upward, which in turn pushes the operator's arm, alerting the operator that the stamping work is about to begin. This provides the operator with spare time and also allows for intervention in case the operator is in danger. When the blocking plate 7 rises to its limit, the arc plate 9 is also driven by the blocking plate 7 to rise into the arc groove 20. At this time, the arc plate 9 entering the arc groove 20 is squeezed and adheres to the inner wall of the arc groove 20. When the arc groove 20 squeezes the arc plate 9, it causes the arc plate 9 to rotate. The rotation of the arc plate 9 drives the torsion spring 28 to contract. At this time, the torsion spring 28 continuously provides the torque for reset, so that the arc plate 9 can fit tightly in the arc groove 20. Through the setting of the arc plate 9 and its upper sponge plate 10, it is not easy for the operator to be pinched when reminded by the blocking plate 7. It also makes the blocking plate 7 more tightly blocking the gap between the stamping plate 5 and the base 1, improving the blocking plate 7's ability to block metal debris.

[0041] Reference Figure 1 and Figure 2 A drive motor 11 is fixedly connected to the outside of the lower template 6. The output end of the drive motor 11 passes through the lower template 6 and is fixedly connected to a bidirectional screw 13. The bidirectional screw 13 is rotatably connected to the lower template 6. Both ends of the bidirectional screw 13 are threadedly connected to side plates 12.

[0042] When it is necessary to remove the stamped workpiece, the drive motor 11 is started to drive the bidirectional screw 13 to rotate. Since the bidirectional screw 13 is rotatably connected to the lower template 6, and both ends of the bidirectional screw 13 are threaded with side plates 12, the two side plates 12 will move in opposite directions along the axis of the bidirectional screw 13 during the rotation of the bidirectional screw 13. When the side plates 12 move in opposite directions, the distance between them increases, which can release the workpiece and make it easier to remove the workpiece manually. This design not only simplifies the workpiece removal process and improves work efficiency, but also ensures the safety of operation.

[0043] Working principle: When using this device to stamp a workpiece, the workpiece is first placed on the lower template 6. Then, the hydraulic rod 4 is activated to move the stamping plate 5 to the lower template 6. As the stamping plate 5 moves downward, it drives the upper template 21 to press the workpiece. The upper template 21 and the lower template 6 press the workpiece from both sides, stamping it into a suitable shape. When the stamping plate 5 descends, it drives the rack plate 19 to move towards the base 1. As the rack plate 19 moves, the sliding groove slides along the sliding column 22 to limit the movement of the rack plate 19. When the rack plate 19 moves, it drives the connecting gear 18 to rotate. The rotation of the connecting gear 18 drives the connecting column 17 to rotate, and the rotation of the connecting column 17 causes the bevel gear 16 to rotate. The rotation of bevel gear 16 drives bevel gear 15 to rotate, which in turn drives the lifting screw 14 to rotate. The rotation of the lifting screw 14 further drives the lifting frame 8 to move upward. During the upward movement of the lifting frame 8, it is guided by the lifting column 23, making the upward movement of the lifting frame 8 more stable. As the lifting frame 8 rises, it also drives the blocking plate 7 to rise. When the stamping plate 5 completes the stamping action and begins to rise, the rack plate 19 also moves in the opposite direction. The connecting gear 18 rotates in the opposite direction. Through the transmission of the bevel gear, the lifting screw 14 rotates in the opposite direction, driving the lifting frame 8 to descend smoothly, causing the blocking plate 7 to descend. This allows the device to automatically raise the blocking plate 7 to shield the stamping area during stamping, making the stamping process safer.

[0044] When the baffle plate 7 rises, it will cause the arc-shaped plate 9 at its upper end to rise as well. When the operator changes the workpiece with their arm, the rising arc-shaped plate 9 will first come into contact with the operator's arm. At this time, due to the obstruction of the arm, the arc-shaped plate 9 and the baffle plate 7 stop rising. Simultaneously, the baffle plate 7 presses down on the lifting column 25, causing the lifting column 25 to slide inside the lifting frame 8. At this time, the spring 26 is compressed by the baffle plate 7 and the lifting frame 8, which allows the spring 26 to continuously provide a restoring thrust to push the baffle plate 7 upward, causing the baffle plate 7 to drive the arc-shaped plate 9 upward. In turn, the arc-shaped plate 9 pushes the operator's arm, alerting the operator that the stamping work is about to begin. This not only provides the operator with spare time but also allows for intervention in case the operator is in danger. When the blocking plate 7 rises to its limit, the arc plate 9 is also driven by the blocking plate 7 to rise into the arc groove 20. At this time, the arc plate 9 entering the arc groove 20 is squeezed and adheres to the inner wall of the arc groove 20. When the arc groove 20 squeezes the arc plate 9, it causes the arc plate 9 to rotate. The rotation of the arc plate 9 drives the torsion spring 28 to contract. At this time, the torsion spring 28 continuously provides the torque for reset, so that the arc plate 9 can fit tightly in the arc groove 20. Through the setting of the arc plate 9 and its upper sponge plate 10, it is not easy for the operator to be pinched when reminded by the blocking plate 7. It also makes the blocking plate 7 more tightly blocking the gap between the stamping plate 5 and the base 1, improving the blocking plate 7's ability to block metal debris.

[0045] When it is necessary to remove the stamped workpiece, the drive motor 11 is started to drive the bidirectional screw 13 to rotate. Since the bidirectional screw 13 is rotatably connected to the lower template 6, and both ends of the bidirectional screw 13 are threaded with side plates 12, the two side plates 12 will move in opposite directions along the axis of the bidirectional screw 13 during the rotation of the bidirectional screw 13. When the side plates 12 move in opposite directions, the distance between them increases, which can release the workpiece and make it easier to remove the workpiece manually. This design not only simplifies the workpiece removal process and improves work efficiency, but also ensures the safety of operation.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Punch with safety device, comprising a base (1), characterized in that: The upper surface of the base (1) is fixedly connected with four fixed columns (2), the upper ends of the four fixed columns (2) are fixedly connected with fixed frames (3), the inside of the fixed frame (3) is fixedly connected with a hydraulic rod (4), the telescopic end of the hydraulic rod (4) is fixedly connected with a punching plate (5), the punching plate (5) is slidably connected with the fixed column (2), the lower surface of the punching plate (5) is fixedly connected with an upper die plate (21), the upper surface of the base (1) is fixedly connected with a lower die plate (6), the inside of the base (1) is slidably connected with a lifting frame (8), the upper surface of the lifting frame (8) is mounted with a blocking plate (7), the lower surface of the punching plate (5) is fixedly connected with a sliding plate (24), the lower end of the sliding plate (24) is slidably connected with the base (1), and the inside of the base (1) is provided with a protection structure.

2. A punch press with a safety device according to claim 1, characterized in that: The protection structure comprises a lifting screw (14) rotatably connected in the inside of the base (1), the outer surface of the lifting screw (14) is threadedly connected with the lifting frame (8), and the inside of the base (1) is fixedly connected with a lifting column (23).

3. A punch press with a safety device according to claim 2, characterized in that: The upper surface of the lifting frame (8) is slidably connected with a lifting column (25), the upper end of the lifting column (25) is fixedly connected with the blocking plate (7), the outer side of the lifting column (25) is sleeved with a spring (26), and the two ends of the spring (26) are fixedly connected with the blocking plate (7) and the lifting frame (8) respectively.

4. A punch press with a safety device according to claim 3, characterized in that: The upper end of the blocking plate (7) is rotatably connected with a rotating column (27), the outer surface of the rotating column (27) is fixedly connected with an arc-shaped plate (9), the outer side of the rotating column (27) is sleeved with a torsional spring (28), and the two ends of the torsional spring (28) are fixedly connected with the blocking plate (7) and the arc-shaped plate (9) respectively.

5. A punch press with a safety device according to claim 4, characterized in that: The upper surface of the arc-shaped plate (9) is fixedly connected with a sponge plate (10), the lower surface of the punching plate (5) is provided with an arc-shaped groove (20), and the arc-shaped groove (20) is matched with the arc-shaped plate (9) in shape.

6. A punch press with a safety device according to claim 2, characterized in that: The upper end of the lifting screw (14) is fixedly connected with a bevel gear one (15), the inside of the base (1) is rotatably connected with a connecting column (17), one end of the connecting column (17) is fixedly connected with a bevel gear two (16), the outer surface of the bevel gear one (15) is meshed with the bevel gear two (16), the other end of the connecting column (17) penetrates through the base (1) and is fixedly connected with a connecting gear (18), one side of the punching plate (5) is fixedly connected with a rack plate (19), and one side of the rack plate (19) is meshed with the connecting gear (18).

7. A punch press with a safety device according to claim 6, characterized in that: One side of the base (1) is fixedly connected with a sliding column (22), the inside of the rack plate (19) is provided with a sliding groove, and the sliding groove is slidably connected with the sliding column (22).

8. The punch press with a safety device according to claim 1, characterized in that: The outer side of the lower die plate (6) is fixedly connected with a driving motor (11), the output end of the driving motor (11) penetrates through the lower die plate (6) and is fixedly connected with a bidirectional screw rod (13), the bidirectional screw rod (13) is rotatably connected with the lower die plate (6), and the two ends of the bidirectional screw rod (13) are threadedly connected with side plates (12).

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