Circular knife four-stamping knife die structure

Abstract

The utility model belongs to the technical field of circular knife four-stamping knife dies, and particularly relates to a circular knife four-stamping knife die structure which comprises a working table, a roller and a circular knife four-stamping knife die and further comprises two fixing plates, the two fixing plates are fixedly installed at the top of the working table, the roller is rotatably installed between the two fixing plates, a sliding groove is formed in the working table, and the sliding groove is formed in the working table. The circular knife four-stamping knife die is arranged between the working table and the roller, limiting columns are installed at the two ends of the circular knife four-stamping knife die in an inserted mode, sliding rods are rotationally installed at the ends, away from each other, of the two limiting columns, the lower ends of the two sliding rods extend into the sliding groove, and the two sliding rods are slidably connected with the sliding groove; the guide column is rotatably mounted on one of the sliding rods, the guide column is coaxially connected with one of the limiting columns, and a sleeve is slidably mounted at one end of the guide column; the circular knife four-stamping knife die can be replaced, operation is easy, tools are not needed, and meanwhile the circular knife four-stamping knife dies of different lengths can be fixed.

Description

Technical Field

[0001] This utility model belongs to the field of circular four-punch die-cutting technology, and particularly relates to a circular four-punch die-cutting structure. Background Technology

[0002] The circular die four-punch die structure is a die design that eliminates the waste material in the middle of the normal circular die three-punch process. By adding an asynchronous circular die, the process is changed to an asynchronous material-saving die-cutting process to achieve the forming of such products.

[0003] For example, Chinese patent CN222755620U discloses a movable circular die-cutting mold, including a worktable and a circular die-cutting mold body. A second vertical plate is fixedly installed on the left side of the top of the worktable, and a first vertical plate is fixedly installed on the right side of the top of the worktable. A third servo motor is fixedly installed on the right side of the first vertical plate, and the output end of the third servo motor is fixedly connected to a second rotating shaft. This circular die-cutting mold can drive a gear to rotate via the output end of the first servo motor. When the gear rotates, it can drive a first toothed plate and a second toothed plate to move outwards from the worktable. When the first toothed plate and the first mounting plate move, they simultaneously drive a first support plate, a first mounting plate, a second support plate, and a second mounting plate to move outwards from the worktable. As the second mounting plate and the first mounting plate move, they cause a second locking block and a first locking block to leave the inner cavity of the locking slot, completing the disassembly of the circular die-cutting mold body.

[0004] The aforementioned patent has the following problems:

[0005] This patent has some drawbacks in its use, such as the fact that the device uses a motor to install and disassemble the circular die body, which requires additional electrical energy and increases operating costs. Therefore, we propose a four-stroke circular die structure. Utility Model Content

[0006] The purpose of this utility model is to provide a circular four-punch die structure to solve the problems mentioned in the background art.

[0007] In view of this, the present invention provides a circular four-punch die structure, including a worktable, a roller, and a circular four-punch die, and further includes:

[0008] Two fixed plates are fixedly installed on the top of the workbench. The roller is rotatably installed between the two fixed plates. A sliding groove is opened in the workbench. The circular four-punch die is set between the workbench and the roller. Limiting posts are inserted and installed at both ends of the circular four-punch die. Sliding rods are rotatably installed at the ends of the two limiting posts that are far apart from each other. The lower ends of the two sliding rods extend into the sliding groove, and the two sliding rods are slidably connected to the sliding groove.

[0009] A guide post is rotatably mounted on one of the sliding rods and coaxially connected to one of the limiting posts. A sleeve is slidably mounted on one end of the guide post, and the sleeve is rotatably connected to one of the fixing plates.

[0010] A drive assembly, located within one of the fixed plates, is used to drive the roller and sleeve to rotate;

[0011] A fixing component is located inside the worktable and is used to fix the positions of the two sliding rods.

[0012] In this technical solution, when the whole device is in use, the set drive component can drive the roller and sleeve to rotate, the sleeve drives the guide column to rotate, the guide column drives one of the limit columns to rotate, and one of the limit columns drives the circular four-punch die and the other limit column to rotate, thereby performing the mold opening operation.

[0013] When it is necessary to disassemble the circular four-punch die, one of the sliding rods can be pulled to slide through the fixed components, and at the same time, one of the limiting pins will disengage from the circular four-punch die, so that the circular four-punch die can be disassembled. Then, by reversing the above operation, a new circular four-punch die can be fixed.

[0014] When it is necessary to fix circular four-punch die-cutting molds of different lengths, the operator can pull the position of two sliding rods through the fixed components. When one sliding rod is sliding, the other sliding rod drives the guide post to slide inside the sleeve, ensuring that the distance between the two sliding rods is the same as the length of the circular four-punch die-cutting mold to be installed. The new circular four-punch die-cutting mold can be fixed by the above reverse operation.

[0015] In the above technical solution, the driving component further includes:

[0016] The power chamber is located inside one of the fixed plates. Two gears are rotatably installed inside the power chamber. The two gears mesh with each other. One end of each gear passes through the power chamber and is coaxially connected to the roller and the sleeve, respectively.

[0017] The motor is fixedly mounted on one of the fixed plates, and the output shaft of the motor passes through one of the fixed plates and extends into the power chamber. The output shaft of the motor is coaxially connected to one of the gears.

[0018] In this technical solution, the motor is started, and the motor is powered on and drives one of the gears to rotate. One of the gears drives another gear meshing with it to rotate in the opposite direction. The two gears drive the roller and the sleeve to rotate respectively. The sleeve drives the guide post to rotate. The guide post drives one of the limit posts to rotate. One of the limit posts drives the circular four-punch die and the other limit post to rotate, thereby performing the mold opening operation.

[0019] In the above technical solution, the fixing component further includes:

[0020] Two sliding bars are slidably installed in a sliding groove. Several first limiting blocks and several second limiting blocks are fixedly installed on each of the two sliding bars. One end of each of the several first limiting blocks is inserted into one of the sliding rods, and one end of each of the several second limiting blocks is inserted into the other sliding rod. The several first limiting blocks and several second limiting blocks are slidably connected to the sliding groove.

[0021] A threaded rod is rotatably installed in a sliding groove. One end of the threaded rod passes through two sliding bars and the sliding groove and extends to the outside. The threaded rod has two sections of threads with opposite directions of rotation, and the threaded rod is threadedly connected to the two sliding bars.

[0022] In this technical solution, when it is necessary to disassemble the circular four-punch die, firstly rotate the threaded rod. Under the action of the thread, the threaded rod drives the two sliding bars to slide and move away from each other. The two sliding bars respectively drive a number of first limiting blocks and a number of second limiting blocks to slide. When the number of first limiting blocks are all disengaged from one of the sliding rods, stop rotating the threaded rod. At this time, the number of second limiting blocks are still in the other sliding rod, which can fix the position of the other sliding rod. Then, pull one of the sliding rods to slide, and at the same time, one of the limiting pins disengages from the circular four-punch die, which can disassemble the circular four-punch die. Then, through the above reverse operation, a new circular four-punch die can be fixed.

[0023] When it is necessary to fix circular four-punch dies of different lengths, the above operation can drive two of the first limiting blocks to disengage from one of the sliding rods. After the second limiting block disengages from the other sliding rod, the operator can pull the position of the two sliding rods. When the other sliding rod is sliding, it drives the guide post to slide within the sleeve, ensuring that the distance between the two sliding rods is the same as the length of the circular four-punch die to be installed. The new circular four-punch die can be fixed by the above reverse operation.

[0024] In the above technical solution, two first sliding pillars are slidably installed in the sliding groove. One end of each of the two first sliding pillars is fixedly installed with a first spring that is fixed to the inner wall of the sliding groove. The other end of each of the two first sliding pillars extends into one of the sliding bars, and the other end of each of the two first sliding pillars is inserted into one of the sliding bars.

[0025] In this technical solution, one of the sliding bars presses the two first sliding columns to slide, while the two first springs are compressed and contracted at the same time;

[0026] When all the first limit blocks disengage from one of the sliding rods, under the action of the rebound force of the two first springs, both first sliding posts slide and insert into one of the sliding bars, which can alert the operator.

[0027] In the above technical solution, furthermore, a second sliding column is slidably installed in each of the two sliding rods, and a second spring fixedly installed at one end of each of the two second sliding columns is fixed to the sliding rod. A plurality of grooves are opened in the worktable, and the other ends of the two second sliding columns are inserted into the corresponding grooves.

[0028] In this technical solution, the operator can pull the position of the two sliding rods, and the worktable will squeeze the two second sliding columns to slide. Both second springs are compressed and contracted. When both sliding rods slide to the appropriate position, under the action of the rebound force of the two second springs, both second sliding columns slide. Finally, the two second sliding columns are inserted into the corresponding grooves. At this time, the operator feels resistance and can pre-fix the sliding rods.

[0029] In the above technical solution, the output shaft of the motor is further rotatably connected to one of the fixed plates and the power cavity.

[0030] In this technical solution, it is ensured that the output shaft of the motor can rotate within one of the fixed plates and the power chamber.

[0031] In the above technical solution, an operating disc is further fixedly installed at one end of the threaded rod.

[0032] In this technical solution, the control panel facilitates the operator's rotation of the threaded rod.

[0033] The beneficial effects of this utility model are:

[0034] 1. In this circular die four-punch die structure, when it is necessary to disassemble the circular die four-punch die, one of the sliding rods can be pulled to slide through the fixed components, and at the same time one of the limiting pins will disengage from the circular die four-punch die, so that the circular die four-punch die can be disassembled. Then, by reversing the above operation, a new circular die four-punch die can be fixed. The operation is simple and does not require the use of tools.

[0035] 2. This circular four-punch die structure allows for the fixing of dies of different lengths by means of a fixed component. The operator can pull the position of two sliding rods. When one sliding rod slides, the other slides, causing the guide post to slide within the sleeve, ensuring that the distance between the two sliding rods is the same as the length of the circular four-punch die to be installed. This reverse operation allows for the fixing of new circular four-punch dies of different lengths. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0037] Figure 2 This is one of the schematic diagrams of the cross-sectional structure of the fixing plate of this utility model;

[0038] Figure 3 This is the second schematic diagram of the cross-sectional structure of the fixing plate of this utility model;

[0039] Figure 4 This is a schematic diagram of the partial explosion structure of this utility model;

[0040] Figure 5 This is one of the schematic diagrams of the cross-sectional structure of the workbench of this utility model;

[0041] Figure 6 This is the utility model Figure 5 Enlarged structural diagram at point A;

[0042] Figure 7 This is a schematic diagram of the sliding bar area structure of this utility model;

[0043] Figure 8 This is the second schematic diagram of the cross-sectional structure of the workbench of this utility model;

[0044] Figure 9 This is the utility model Figure 8 Enlarged structural diagram at point B.

[0045] The markings in the diagram are as follows:

[0046] 1. Workbench; 2. Fixed plate; 3. Roller; 4. Sliding groove; 5. Sliding rod; 6. Circular four-punch die; 7. Limiting post; 8. Guide post; 9. Sleeve; 10. Motor; 11. Power chamber; 12. Gear; 13. Sliding bar; 14. First limiting block; 15. Second limiting block; 16. Threaded rod; 17. First sliding post; 18. First spring; 19. Second sliding post; 20. Second spring; 21. Groove; 22. Operation panel. Detailed Implementation

[0047] The following is in conjunction with the appendix Figures 1-9 This application will be described in further detail.

[0048] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0049] Example 1: This example provides a circular four-punch die structure, including a worktable 1, a roller 3, and a circular four-punch die 6, and also includes:

[0050] Two fixed plates 2 are fixedly installed on the top of the workbench 1. The roller 3 is rotatably installed between the two fixed plates 2. A sliding groove 4 is opened in the workbench 1. A circular four-punch die 6 is set between the workbench 1 and the roller 3. Limiting posts 7 are inserted and installed at both ends of the circular four-punch die 6. Sliding rods 5 are rotatably installed at the ends of the two limiting posts 7 that are far apart from each other. The lower ends of the two sliding rods 5 extend into the sliding groove 4, and the two sliding rods 5 are slidably connected to the sliding groove 4.

[0051] Guide post 8 is rotatably mounted on one of the sliding rods 5, and guide post 8 is coaxially connected with one of the limiting posts 7. A sleeve 9 is slidably mounted on one end of guide post 8, and sleeve 9 is rotatably connected to one of the fixing plates 2.

[0052] A drive assembly is located within one of the fixed plates 2 and is used to drive the roller 3 and the sleeve 9 to rotate.

[0053] A fixing component is located inside the worktable 1 and is used to fix the positions of the two sliding rods 5.

[0054] When the whole device is in use, the set drive component can drive the roller 3 and the sleeve 9 to rotate, the sleeve 9 drives the guide post 8 to rotate, the guide post 8 drives one of the limit posts 7 to rotate, and one of the limit posts 7 drives the circular knife four-punch die 6 and the other limit post 7 to rotate, thereby performing the mold opening operation.

[0055] When it is necessary to disassemble the circular four-punch die 6, one of the sliding rods 5 can be pulled to slide through the fixed components, and at the same time one of the limiting posts 7 will disengage from the circular four-punch die 6, so that the circular four-punch die 6 can be disassembled. Then, by reversing the above operation, a new circular four-punch die 6 can be fixed.

[0056] When it is necessary to fix the circular four-punch die 6 of different lengths, the operator can pull the position of the two sliding rods 5 through the fixed components. When the other sliding rod 5 is sliding, the other sliding rod 5 drives the guide post 8 to slide in the sleeve 9, ensuring that the distance between the two sliding rods 5 is the same as the length of the circular four-punch die 6 to be installed. The new circular four-punch die 6 can be fixed by the above reverse operation.

[0057] In this embodiment, the driving component includes:

[0058] The power chamber 11 is located inside one of the fixed plates 2. Two gears 12 are rotatably installed inside the power chamber 11. The two gears 12 mesh with each other. One end of each gear 12 passes through the power chamber 11, and one end of each gear 12 is coaxially connected to the roller 3 and the sleeve 9, respectively.

[0059] Motor 10 is fixedly mounted on one of the fixed plates 2. The output shaft of motor 10 passes through one of the fixed plates 2 and extends into the power chamber 11. The output shaft of motor 10 is coaxially connected to one of the gears 12.

[0060] The motor 10 is started and powered on, which drives one of the gears 12 to rotate. One of the gears 12 drives the other gear 12, which meshes with it, to rotate in the opposite direction. The two gears 12 drive the roller 3 and the sleeve 9 to rotate respectively. The sleeve 9 drives the guide post 8 to rotate. The guide post 8 drives one of the limiting posts 7 to rotate. One of the limiting posts 7 drives the circular four-punch die 6 and the other limiting post 7 to rotate, thereby performing the mold opening operation.

[0061] In this embodiment, the fixing component includes:

[0062] Two sliding bars 13 are slidably installed in the sliding groove 4. Several first limiting blocks 14 and several second limiting blocks 15 are fixedly installed on each of the two sliding bars 13. One end of each of the first limiting blocks 14 is inserted into one of the sliding rods 5, and one end of each of the second limiting blocks 15 is inserted into the other sliding rod 5. The first limiting blocks 14 and the second limiting blocks 15 are slidably connected to the sliding groove 4.

[0063] The threaded rod 16 is rotatably installed in the sliding groove 4. One end of the threaded rod 16 passes through the two sliding bars 13 and the sliding groove 4 and extends to the outside. The threaded rod 16 is provided with two sections of threads with opposite directions of rotation, and the threaded rod 16 is threadedly connected to the two sliding bars 13.

[0064] When it is necessary to disassemble the circular four-punch die 6, firstly rotate the threaded rod 16. Under the action of the thread, the threaded rod 16 drives the two sliding bars 13 to slide and move away from each other. The two sliding bars 13 respectively drive a number of first limiting blocks 14 and a number of second limiting blocks 15 to slide. When the number of first limiting blocks 14 are all disengaged from one of the sliding rods 5, stop rotating the threaded rod 16. At this time, the number of second limiting blocks 15 are still in the other sliding rod 5, which can fix the position of the other sliding rod 5. Then pull one of the sliding rods 5 to slide, and at the same time, one of the limiting pins 7 disengages from the circular four-punch die 6, which can disassemble the circular four-punch die 6. Then, through the above reverse operation, a new circular four-punch die 6 can be fixed.

[0065] When it is necessary to fix the circular four-punch die 6 of different lengths, the above operation can drive the two first limiting blocks 14 to disengage from one of the sliding rods 5. After the second limiting block 15 disengages from the other sliding rod 5, the operator can pull the position of the two sliding rods 5. When the other sliding rod 5 is sliding, the other sliding rod 5 drives the guide post 8 to slide in the sleeve 9, ensuring that the distance between the two sliding rods 5 is the same as the length of the circular four-punch die 6 to be installed. The new circular four-punch die 6 can be fixed by the above reverse operation.

[0066] Example 2:

[0067] This embodiment provides a circular die-cutting four-punch die structure, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0068] In this embodiment, two first sliding posts 17 are slidably installed in the sliding groove 4. One end of each of the two first sliding posts 17 is fixedly installed with a first spring 18 that is fixed to the inner wall of the sliding groove 4. The other end of each of the two first sliding posts 17 extends into one of the sliding bars 13, and the other end of each of the two first sliding posts 17 is inserted into one of the sliding bars 13.

[0069] In one of the sliding bars 13, the two first sliding columns 17 are pushed to slide, while the two first springs 18 are compressed and contracted.

[0070] When several first limit blocks 14 disengage from one of the sliding rods 5, under the action of the rebound force of the two first springs 18, the two first sliding posts 17 slide and insert into one of the sliding bars 13, which can alert the operator.

[0071] Example 3:

[0072] This embodiment provides a circular die-cutting four-punch die structure, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0073] In this embodiment, a second sliding post 19 is slidably installed in each of the two sliding rods 5. A second spring 20 fixed to the sliding rod 5 is fixedly installed at one end of each of the two second sliding posts 19. A plurality of grooves 21 are provided in the workbench 1. The other ends of the two second sliding posts 19 are inserted into the corresponding grooves 21.

[0074] The operator can pull the position of the two sliding rods 5, and the worktable 1 will squeeze the two second sliding columns 19 to slide, and the two second springs 20 will be compressed and contracted. When the two sliding rods 5 slide to the appropriate position, the two second sliding columns 19 will slide under the action of the rebound force of the two second springs 20. Finally, the two second sliding columns 19 are inserted into the corresponding grooves 21 respectively. At this time, the operator feels the resistance and can pre-fix the sliding rods 5.

[0075] Example 4:

[0076] This embodiment provides a circular die-cutting four-punch die structure, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0077] In this embodiment, the output shaft of the motor 10 is rotatably connected to one of the fixed plates 2 and the power cavity 11.

[0078] This ensures that the output shaft of the motor 10 can rotate within one of the fixed plates 2 and the power chamber 11.

[0079] Example 5:

[0080] This embodiment provides a circular die-cutting four-punch die structure, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0081] In this embodiment, an operating disc 22 is fixedly installed at one end of the threaded rod 16.

[0082] The control panel 22 allows operators to easily rotate the threaded rod 16.

[0083] Working principle: When the whole device is in use, the motor 10 is started. The motor 10 is powered on and drives one of the gears 12 to rotate. One of the gears 12 drives the other gear 12 that meshes with it to rotate in the opposite direction. The two gears 12 drive the roller 3 and the sleeve 9 to rotate respectively. The sleeve 9 drives the guide post 8 to rotate. The guide post 8 drives one of the limiting posts 7 to rotate. One of the limiting posts 7 drives the circular four-punch die 6 and the other limiting post 7 to rotate, thereby performing the mold opening operation.

[0084] When it is necessary to disassemble the circular four-punch die 6, first rotate the operating disc 22 and drive the threaded rod 16 to rotate. Under the action of the thread, the threaded rod 16 drives the two sliding bars 13 to slide and move away from each other. One of the sliding bars 13 presses the two first sliding pillars 17 to slide. At the same time, the two first springs 18 are compressed and contracted. Meanwhile, the two sliding bars 13 respectively drive a number of first limiting blocks 14 and a number of second limiting blocks 15 to slide. When the number of first limiting blocks 14 are all disengaged from one of the sliding rods 5, under the action of the rebound force of the two first springs 18, the two first sliding pillars 17 slide and are inserted into one of the sliding bars 13. When the operator feels resistance, stop rotating the operating disc 22. At this time, the number of second limiting blocks 15 are still in the other sliding rod 5, and the position of the other sliding rod 5 can be fixed. Then, pull one of the sliding rods 5 to slide. At the same time, one of the limiting pillars 7 disengages from the circular four-punch die 6, and the circular four-punch die 6 can be disassembled. Then, through the above reverse operation, a new circular four-punch die 6 can be fixed.

[0085] When it is necessary to fix the circular four-punch die 6 of different lengths, the above operation can drive two of the first limiting blocks 14 to disengage from one of the sliding rods 5. When the operator feels resistance, continue to rotate the operating disk 22. After the second limiting block 15 disengages from the other sliding rod 5, the operator can pull the position of the two sliding rods 5. When the other sliding rod 5 is sliding, it drives the guide post 8 to slide in the sleeve 9. At the same time, the worktable 1 will squeeze the two second sliding posts 19 to slide, and the two second springs 20 will be compressed and contracted. When the two sliding rods 5 have slid to the appropriate position, the two second sliding posts 19 will slide under the action of the rebound force of the two second springs 20. Finally, the two second sliding posts 19 are inserted into the corresponding grooves 21 respectively. At this time, the operator feels resistance and can pre-fix the sliding rods 5 to ensure that the distance between the two sliding rods 5 is the same as the length of the circular four-punch die 6 to be installed. Then, the new circular four-punch die 6 can be fixed by the above reverse operation.

[0086] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A circular four-punch die structure, comprising a worktable (1), a roller (3), and a circular four-punch die (6), characterized in that, Also includes: Two fixed plates (2) are fixedly installed on the top of the workbench (1). The roller (3) is rotatably installed between the two fixed plates (2). A sliding groove (4) is provided in the workbench (1). The circular knife four-punch die (6) is set between the workbench (1) and the roller (3). Limiting posts (7) are inserted and installed at both ends of the circular knife four-punch die (6). Sliding rods (5) are rotatably installed at the ends of the two limiting posts (7) that are far apart from each other. The lower ends of the two sliding rods (5) extend into the sliding groove (4), and the two sliding rods (5) are slidably connected to the sliding groove (4). A guide post (8) is rotatably mounted on one of the sliding rods (5), and the guide post (8) is coaxially connected with one of the limiting posts (7). A sleeve (9) is slidably mounted on one end of the guide post (8), and the sleeve (9) is rotatably connected with one of the fixing plates (2). A drive assembly, which is located within one of the fixed plates (2) and is used to drive the roller (3) and sleeve (9) to rotate; A fixing component is located inside the worktable (1) and is used to fix the positions of the two sliding rods (5).

2. The circular four-punch die structure according to claim 1, characterized in that, The driving component includes: The power chamber (11) is located in one of the fixed plates (2). Two gears (12) are rotatably installed in the power chamber (11). The two gears (12) mesh with each other. One end of each gear (12) passes through the power chamber (11), and one end of each gear (12) is coaxially connected to the roller (3) and the sleeve (9), respectively. The motor (10) is fixedly mounted on one of the fixing plates (2). The output shaft of the motor (10) passes through one of the fixing plates (2) and extends into the power chamber (11). The output shaft of the motor (10) is coaxially connected to one of the gears (12).

3. The circular four-punch die structure according to claim 2, characterized in that, The fixing component includes: Two sliding bars (13) are slidably installed in the sliding groove (4). Several first limiting blocks (14) and several second limiting blocks (15) are fixedly installed on the two sliding bars (13). One end of each of the first limiting blocks (14) is inserted into one of the sliding rods (5), and one end of each of the second limiting blocks (15) is inserted into the other sliding rod (5). The first limiting blocks (14) and the second limiting blocks (15) are slidably connected to the sliding groove (4). A threaded rod (16) is rotatably installed in a sliding groove (4). One end of the threaded rod (16) passes through two sliding bars (13) and the sliding groove (4) and extends to the outside. The threaded rod (16) is provided with two threads with opposite directions, and the threaded rod (16) is threadedly connected to the two sliding bars (13).

4. The circular four-punch die structure according to claim 3, characterized in that, Two first sliding columns (17) are slidably installed in the sliding groove (4). One end of each of the two first sliding columns (17) is fixedly installed with a first spring (18) that is fixed to the inner wall of the sliding groove (4). The other end of each of the two first sliding columns (17) extends into one of the sliding bars (13), and the other end of each of the two first sliding columns (17) is inserted into one of the sliding bars (13).

5. The circular four-punch die structure according to claim 1, characterized in that, Each of the two sliding rods (5) has a second sliding column (19) slidably installed inside it. One end of each of the two second sliding columns (19) is fixedly installed with a second spring (20) that is fixed to the sliding rod (5). The worktable (1) has several grooves (21) inside it. The other end of each of the two second sliding columns (19) is inserted into the corresponding groove (21).

6. The circular four-punch die structure according to claim 2, characterized in that, The output shaft of the motor (10) is rotatably connected to one of the fixed plates (2) and the power chamber (11).

7. The circular four-punch die structure according to claim 3, characterized in that, An operating panel (22) is fixedly installed at one end of the threaded rod (16).

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