Punching device for flexible circuit board production

Abstract

The invention relates to the technical field of circuit board processing, in particular to a punching device for flexible circuit board production, which comprises a base, the top of the base is connected with a punching table through a bolt, one side of the top of the base is provided with a rodless cylinder, the rodless cylinder is slidably connected with a sliding block, the sliding block is connected with a motor, and an output shaft of the motor is provided with a rotating body. A punching head is arranged at the bottom of the rotating body, symmetrical liquid flowing pipes are arranged in the rotating body, a groove is formed in the side, close to the motor, of the rotating body, the sides, close to the motor, of the liquid flowing pipes penetrate out of the groove of the rotating body, a hollow ring body is communicated between the sides, close to the motor, of the liquid flowing pipes and the bottoms of the liquid flowing pipes, and the hollow ring body is installed in the rotating body. And the liquid flowing cavity is communicated with the hollow ring body. The piston rod is driven to rotate through the liquid storage box, the piston rod moves up and down intermittently through intermittent extrusion fit of the ball and the arc block, lubricating oil can intermittently flow to the punching head for lubrication through vertical movement of the piston rod, and therefore the service life of the punching head is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board processing, and particularly to a punching device for flexible circuit board production. Background Art

[0002] When processing a flexible circuit board, punching needs to be performed on the flexible circuit board. Existing punching devices are composed of components such as a workbench, a transmission mechanism, and a punch. First, the flexible circuit board is fixed on the workbench, and then the transmission mechanism and the punch are started. The transmission mechanism drives the punch to descend, so that the punch approaches the flexible circuit board and automatically punches the flexible circuit board. When punching, the punching head of the punch will rotate, so a very large frictional force will be generated between the punching head and the flexible circuit board. After long-term use, the punching head will generate high temperature and is prone to wear. Therefore, a punching device for flexible circuit board production is designed to reduce the wear of the punching head by adding lubricating oil and improve its service life. Summary of the Invention

[0003] In order to overcome the disadvantages that the punching head of the existing punching device will generate high temperature and is prone to wear after long-term use, the technical problem of the present invention is to provide a punching device for flexible circuit board production, which reduces the wear of the punching head by adding lubricating oil and improves its service life.

[0004] A punching device for flexible circuit board production includes a base. A punching table is connected to the top of the base by bolts. A rodless cylinder is arranged on one side of the top of the base. A slider is slidably connected to the rodless cylinder. A motor is connected to the slider. A rotating body is installed on the output shaft of the motor. A punching head is arranged at the bottom of the rotating body. Symmetrical liquid flow pipes are arranged inside the rotating body. A groove is arranged on the side of the rotating body close to the motor. The liquid flow pipes penetrate through the groove position of the rotating body on the side close to the motor. A hollow ring body is connected between the bottoms of the liquid flow pipes. The hollow ring body is installed inside the rotating body. A plurality of liquid flow cavities are evenly opened along the circumferential direction inside the punching head. The liquid flow cavities are communicated with the hollow ring body. A plurality of liquid outlets for discharging lubricating oil are evenly opened along the circumferential direction on the side of the punching head away from the rotating body. The liquid outlets are communicated with the liquid flow cavities.

[0005] Further, it also includes a liquid storage box. The liquid storage box is arranged on the side of the rotating body close to the motor. A one-way liquid inlet for adding lubricating oil is arranged on the side of the liquid storage box away from the rotating body. Symmetrically arranged straight pipe bodies are connected to the side of the liquid storage box away from the motor. Through holes are opened on the side of the straight pipe bodies close to the liquid storage box. The straight pipe bodies are communicated with the liquid storage box through the through holes. A bent pipe body is connected between the side of the straight pipe bodies away from the liquid storage box and the liquid flow pipes. A piston rod is slidably connected inside the straight pipe body. The piston rod is slidably connected to the liquid storage box. The piston rod extends out of the liquid storage box in the direction away from the side of the straight pipe body. A first spring is connected between the upper part of the piston rod and the top of the liquid storage box.

[0006] Further description: It further includes a mounting plate which is fixedly connected to the bottom of the motor housing. A plurality of arc blocks are arranged along the circumferential direction at the bottom of the mounting plate. A sphere is arranged on the side of the piston rod far from the liquid flow pipe, and the sphere is in extrusion fit with the arc blocks.

[0007] Further description: It further includes a moving rod which is slidably connected inside the straight pipe body. A blocking block is fixedly connected to the end of the moving rod. A communication hole is opened at the bottom of the straight pipe body, and the blocking block is in clamping fit with the communication hole. A second spring is connected between the moving rod and the straight pipe body.

[0008] Further description: An extrusion nozzle is arranged on the side of the liquid flow pipe close to the liquid outlet.

[0009] Further description: It further includes a first wedge-shaped block which is respectively slidably connected to the side of the piston head close to the moving rod. A third spring is connected between the mutually remote sides of the first wedge-shaped blocks and the piston head. A plate body is connected to the mutually close sides of the first wedge-shaped blocks. The plate body is in extrusion fit with the moving rod. A second wedge-shaped block is connected inside the straight pipe body, and the second wedge-shaped block is in extrusion fit with the first wedge-shaped block. A cylindrical cavity is arranged inside the piston rod, and the moving rod will be inserted into the cylindrical cavity.

[0010] Further description: It further includes a sliding column which is slidably connected inside the piston rod. A cone is fixedly connected to the bottom of the sliding column. The cone is in extrusion fit with the moving rod. A groove is arranged on the side of the sliding column close to the cone. A third wedge-shaped block is connected to the top of the plate body, and the third wedge-shaped block is in extrusion fit with the cone.

[0011] Further description: It further includes a guiding column which is fixedly connected to the inner top position of the piston rod. The guiding column is slidably connected to the sliding column. A fourth spring is arranged between the top of the sliding column and the inner top of the piston rod. A plurality of air vents are opened on the side of the piston rod close to the guiding column.

[0012] Further description: It further includes an electromagnetic valve which is respectively arranged on the upper part of the liquid flow pipe, and a water inlet pipe is communicated between the liquid flow pipes.

[0013] The beneficial effects of the present invention are as follows: The present invention drives the piston rod to rotate through the liquid storage box. Through the intermittent extrusion fit of the sphere and the arc blocks, the piston rod moves up and down intermittently. The up and down movement of the piston rod can make the lubricating oil flow to the punching head intermittently for lubrication, thereby improving the service life of the punching head.

[0014] The present invention drives the plate body to move down through the piston head. After the blocking block is opened, the lubricating oil is sprayed out. When the piston head moves down to the limit, under the cooperation of the first wedge-shaped block and the second wedge-shaped block, the blocking block will move up to block the communication hole. Then when the piston head moves up and resets, the lubricating oil remaining in the elbow pipe body will not be sucked back into the straight pipe body due to negative pressure. Description of the Drawings

[0015] Figure 1Schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 Partial three-dimensional structure schematic diagram of the present invention.

[0017] Figure 3 Partial three-dimensional structure sectional view of the present invention.

[0018] Figure 4 Schematic diagram of the three-dimensional structure of components such as the hollow ring body and the punching head of the present invention

[0019] Figure 5 Schematic diagram of the three-dimensional structure of components such as the second spring, the first wedge block and the plate body of the present invention.

[0020] Figure 6 Schematic diagram of the three-dimensional structure of components such as the sliding column, the cone and the third wedge block of the present invention.

[0021] Figure 7 Schematic diagram of the three-dimensional structure of components such as the sliding column, the guide column and the fourth spring of the present invention.

[0022] Figure 8 Schematic diagram of the three-dimensional structure of components such as the liquid flow pipe, the water inlet pipe and the electromagnetic valve of the present invention.

[0023] In the above figures: 1: base, 2: punching table, 3: rodless cylinder, 4: slider, 5: motor, 6: rotating body, 7: punching head, 8: liquid outlet, 9: liquid flow pipe, 10: hollow ring body, 11: liquid flow cavity, 12: liquid storage box, 13: straight pipe body, 14: bent pipe body, 15: piston rod, 151: piston head, 16: first spring, 17: mounting plate, 18: arc block, 19: moving rod, 20: blocking block, 21: second spring, 22: first wedge block, 23: plate body, 24: third spring, 25: second wedge block, 26: sliding column, 27: cone, 28: third wedge block, 29: guide column, 30: fourth spring, 31: air vent, 32: water inlet pipe, 33: electromagnetic valve. Detailed implementation manners

[0024] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and explanations of the present invention are used to explain the present invention, but do not limit the present invention.

[0025] Embodiment 1: A punching device for flexible circuit board production, such as Figure 1 , Figure 2 and Figure 4As shown in the figure, it includes a base 1. The top of the base 1 is connected to a punching table 2 by bolts. The punching table 2 can be removed from the base 1 for replacement. At the rear side of the top of the base 1, a rodless cylinder 3 is welded. The rodless cylinder 3 can be controlled to work by an external control device. The rodless cylinder 3 is a prior art and will not be elaborated here. A slider 4 is slidably connected to the rodless cylinder 3. The rodless cylinder 3 can control the up and down movement of the slider 4. The front part of the slider 4 is connected to a motor 5 by bolts. A rotating body 6 is installed on the output shaft of the motor 5. A punching head 7 is arranged at the bottom of the rotating body 6. The rotating body 6 serves as the installation body for the punching head 7. When the punching head 7 is damaged, the punching head 7 can be removed and replaced from the bottom of the rotating body 6. Symmetrical liquid flow pipes 9 are arranged inside the rotating body 6. The liquid flow pipes 9 are used to guide the lubricating oil. A groove is arranged on one side of the rotating body 6 close to the motor 5. The upper ends of the liquid flow pipes 9 penetrate through the groove at the upper part of the rotating body 6. A hollow ring body 10 is connected between the bottoms of the liquid flow pipes 9. When the lubricating oil flows from the liquid flow pipes 9 into the inside of the hollow ring body 10, the hollow ring body 10 serves as the centralized dispersion point of the lubricating oil. Through the hollow ring body 10, two lubricating oil flow channels can be transformed into multiple lubricating oil flow channels, and the lubricating oil is drained along the circumferential direction of the punching head 7, so that the lubricating oil can be evenly sprayed on the outer wall of the punching head 7. The hollow ring body 10 is installed inside the rotating body 6. A plurality of liquid flow cavities 11 are evenly opened along the circumferential direction inside the punching head 7. The liquid flow cavities 11 are communicated with the hollow ring body 10. A plurality of liquid outlets 8 are evenly opened along the circumferential direction at the lower part of the punching head 7. The liquid outlets 8 are communicated with the liquid flow cavities 11.

[0026] When using this punching device for flexible circuit board production, the flexible circuit board can be fixed at the top position of the punching table 2 first. Subsequently, the rodless cylinder 3 and the motor 5 can be started. The rodless cylinder 3 drives the slider 4 to descend. The slider 4 drives the motor 5 and the punching head 7 to move downward. The punching head 7 punches the flexible circuit board. During punching, in order to reduce the wear degree of the punching head 7, lubricating liquid can be injected into the liquid flow pipes 9, so that the lubricating liquid flows along the liquid flow pipes 9 into the hollow ring body 10, and then enters the liquid flow cavities 11 through the hollow ring body 10 and flows out through the liquid outlets 8. In this way, the lubricating oil can lubricate the punching head 7, thereby improving the service life of the punching head 7. After punching, the rodless cylinder 3 can be used to drive the slider 4 and the punching head 7 to move upward to reset, and the motor 5 can be turned off.

[0027] Embodiment 2: On the basis of Embodiment 1, as Figure 3As shown in the figure, it further includes a liquid storage box 12. The liquid storage box 12 is arranged above the rotating body 6. A one-way liquid inlet is provided at the upper right part of the liquid storage box 12. Lubricating oil can be injected into the interior of the liquid storage box 12 through the one-way liquid inlet. Moreover, when a negative pressure is generated inside the liquid storage box 12, external air can also enter the liquid storage box 12 through the one-way liquid inlet. On both the left and right sides of the lower part inside the liquid storage box 12, straight pipe bodies 13 are connected. Through holes are opened in the upper part of the straight pipe bodies 13. The straight pipe bodies 13 communicate with the liquid storage box 12 through the through holes. A bent pipe body 14 is connected between the lower part of each straight pipe body 13 and the liquid flow pipe 9. A piston rod 15 is slidably connected inside each straight pipe body 13. The piston rod 15 is slidably connected to the liquid storage box 12. The upper part of the piston rod 15 passes through the liquid storage box 12. The diameter of the piston head 151 provided at the bottom of the piston rod 15 is smaller than the inner diameter of the straight pipe body 13. The purpose is that glue can flow downward through the gap between the piston head 151 and the straight pipe body 13 to the lower part of the straight pipe body 13. Moreover, when the piston head 151 moves upward, it will not be affected by the suction force generated below the piston head 151 and affect the upward movement and reset of the piston head 151. A first spring 16 is connected between the upper part of each piston rod 15 and the top of the liquid storage box 12.

[0028] As Figure 3 shown in the figure, it further includes a mounting plate 17. The mounting plate 17 is fixedly connected to the bottom of the motor 5 housing. A plurality of arc blocks 18 are arranged along the circumferential direction at the bottom of the mounting plate 17. A sphere is provided at the upper part of the piston rod 15. The sphere is in extrusion fit with the arc blocks 18.

[0029] In order to be able to automatically add lubricating oil, the following solution is adopted: When the rotating body 6 rotates, it will drive the liquid storage box 12, the piston rod 15 and the sphere to rotate. When the sphere contacts the arc block 18, the sphere is pushed downward. The downward movement of the sphere drives the piston rod 15 to move downward. The first spring 16 is compressed. The downward movement of the piston rod 15 drives the piston head 151 to move downward. The downward movement of the piston head 151 can accelerate the outflow of the lubricating oil from the liquid outlet 8 to lubricate the punching head 7. After the sphere and the arc block 18 are separated, the first spring 16 drives the piston rod 15 and the piston head 151 to move upward and reset.

[0030] As Figure 5 shown in the figure, it further includes a moving rod 19. The moving rods 19 are all slidably connected inside the straight pipe bodies 13. Blocks 20 are fixedly connected to the bottoms of the moving rods 19. Communication holes are opened at the bottoms of the straight pipe bodies 13. The blocks 20 are in snap fit with the communication holes. A second spring 21 is connected between the upper parts of the moving rods 19 and the straight pipe bodies 13. Below the liquid flow pipes 9 are all extrusion nozzles. In the normal state, the lubricating oil will not flow out from the extrusion nozzles. Only when the lubricating oil is pressurized will the lubricating oil be sprayed out from the extrusion nozzles.

[0031] As described above, the liquid flow pipe 9 is always in a liquid discharging state. In this way, as long as lubricating oil is injected into the liquid storage box 12, the lubricating oil will flow out continuously, which will cause a large amount of lubricating oil to be wasted. In order to avoid wasting lubricating oil, a scheme for intermittently discharging lubricating oil is set. Initially, the blocking block 20 blocks the communication hole, so that the lubricating oil will not flow out. When the piston head 151 moves downward, the piston head 151 will contact the end of the moving rod 19 and push the moving rod 19 downward. The second spring 21 is stretched, and the moving rod 19 will drive the blocking block 20 to move downward to open the communication hole. In this way, the lubricating oil will flow to the position of the extrusion nozzle. When the piston head 151 continues to move downward, it will extrude the lubricating oil, so that the lubricating oil is ejected from the extrusion nozzle. When the piston head 151 moves upward, under the action of the second spring 21, the moving rod 19 will move upward and reset, and at the same time drive the blocking block 20 to block the communication hole again. Since the diameter of the piston head 151 is smaller than the inner diameter of the straight pipe body 13, when the piston head 151 moves upward and the communication hole is blocked, the piston head 151 will not generate negative pressure below the liquid flow pipe 9 and affect its own upward reset.

[0032] As Figure 5 and Figure 6 shown, it further includes a first wedge block 22. The first wedge blocks 22 are both slidably connected to both sides of the bottom of the piston head 151. A third spring 24 is connected between the mutually remote sides of the first wedge blocks 22 and the piston head 151. Plate bodies 23 are connected to the mutually close sides of the first wedge blocks 22. The plate bodies 23 are in extrusion fit with the moving rod 19. Second wedge blocks 25 are connected to both sides of the upper part inside the straight pipe body 13. The second wedge blocks 25 are in extrusion fit with the first wedge blocks 22. A cylindrical cavity is arranged inside the piston rod 15, and the moving rod 19 will be inserted into the cylindrical cavity.

[0033] As described above, when the piston head 151 moves upward, the moving rod 19 will move upward and reset accordingly. During this process, the piston head 151 generates an upward suction force, which will suck the lubricating oil remaining in the elbow body 14 back into the straight pipe body 13, resulting in a reverse suction situation. To avoid this, the following solution is adopted: the bottom of the plate body 23 resists against the top of the moving rod 19, and when the piston head 151 moves downward, the plate body 23 pushes the moving rod 19 downward. When the piston head 151 moves downward to the limit, the first wedge block 22 and the second wedge block 25 are squeezed and matched, which will drive the first wedge block 22 and the plate body 23 to move away from each other, and the third spring 24 is compressed. After the plate body 23 is separated from the moving rod 19, the second spring 21 will drive the moving rod 19 and the plug 20 to move upward and reset. The upper end of the moving rod 19 will move into the cylindrical cavity. At this time, the piston head 151 is still in the lower state, and the plug 20 moves upward and resets before the piston head 151. Then, when the piston head 151 moves upward and resets, the lubricating oil remaining in the elbow body 14 will not be sucked back into the straight pipe body 13 due to negative pressure. During the process of the piston head 151 driving the plate body 23 and the first wedge block 22 to move upward and reset, after the plate body 23 and the moving rod 19 are separated, the third spring 24 drives the plate body 23 and the first wedge block 22 to move closer to each other and reset, so that the plate body 23 can be re-abutted against the top of the moving rod 19.

[0034] As Figure 6 shown, it further includes sliding columns 26. The sliding columns 26 are all slidably connected in the piston rod 15. The bottoms of the sliding columns 26 are all fixedly connected with cones 27. The cones 27 are squeezed and matched with the moving rod 19. Grooves are arranged on one side of the sliding columns 26 close to the cones 27. The tops of the plate bodies 23 are all connected with third wedge blocks 28. The third wedge blocks 28 are squeezed and matched with the cones 27.

[0035] As Figure 7 shown, it further includes guide columns 29. The guide columns 29 are all fixedly connected to the inner top position of the piston rod 15. The guide columns 29 are slidably connected with the sliding columns 26. Springs four 30 are arranged between the tops of the sliding columns 26 and the inner top of the piston rod 15. A plurality of air vents 31 are opened on one side of the piston rod 15 close to the guide columns 29.

[0036] As described above, the cylindrical cavity has been in a connected state, and it is easy for lubricating oil to enter the interior of the cylindrical cavity and remain in the cylindrical cavity all the time. Therefore, the sliding column 26 is provided to block the cylindrical cavity to prevent lubricating oil from entering. When the moving rod 19 moves upward into the cylindrical cavity, it will push the cone 27 and the sliding column 26 upward, and the fourth spring 30 is compressed. The gas in the cylindrical cavity is discharged from the air vent 31. When the moving rod 19 moves out of the cylindrical cavity, under the action of the fourth spring 30, the sliding column 26 and the cone 27 are driven to move downward and reset. When the bottom of the cone 27 contacts the third wedge 28, the third wedge 28, the plate body 23 and the first wedge 22 are pushed out to the side away from each other, and the third spring 24 is compressed. After the cone 27 moves below the plate body 23, the third spring 24 drives the third wedge 28, the plate body 23 and the first wedge 22 to move and reset to the side close to each other. In this way, the bottom of the plate body 23 presses against the cone 27. During the above operation process, the sliding column 26 always fills the cylindrical cavity, so that lubricating oil can be prevented from entering the cylindrical cavity.

[0037] As Figure 8 shown, an electromagnetic valve 33 is further included. The electromagnetic valve 33 is respectively arranged on the upper part of the liquid flow pipe 9, and the upper parts of the liquid flow pipes 9 are connected to the water inlet pipe 32.

[0038] Connect the water inlet pipe 32 to an external water inlet device. When the device is not in use, the liquid flow pipe 9 and the positions where the lubricating oil passes below can be cleaned. The electromagnetic valve 33 can be opened, and water will wash the liquid flow pipe 9 and the positions where the lubricating oil passes below to achieve the purpose of cleaning. After washing, manually close the electromagnetic valve 33 and disconnect the water inlet pipe 32 from the external water inlet device, so that the flushing operation can be stopped.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A punching device for producing flexible circuit boards, comprising a base (1), a punching table (2) connected to the top of the base (1) by bolts, a rodless cylinder (3) arranged on one side of the top of the base (1), a slider (4) slidably connected to the rodless cylinder (3), a motor (5) connected to the slider (4), a swivel (6) installed on the output shaft of the motor (5), a punching head (7) arranged at the bottom of the swivel (6), wherein: Symmetrical liquid flow pipes (9) are arranged in the rotating body (6), a groove is arranged on the side of the rotating body (6) close to the motor (5), the liquid flow pipe (9) passes through the groove position of the rotating body (6) on the side close to the motor (5), the bottom of the liquid flow pipe (9) is connected to a hollow ring body (10), the hollow ring body (10) is installed inside the rotating body (6), a plurality of liquid flow cavities (11) are evenly opened in the punching head (7) along the circumferential direction, the liquid flow cavities (11) are connected to the hollow ring body (10), and a plurality of liquid outlets (8) for flowing out lubricating oil are evenly opened in the circumferential direction on the side of the punching head (7) away from the rotating body (6), and the liquid outlets (8) are connected to the liquid flow cavities (11).

2. A punching device for producing a flexible circuit board according to claim 1, characterized in that: The invention also comprises a liquid storage box (12), the liquid storage box (12) being arranged on a side of the rotating body (6) close to the motor (5), a one-way liquid inlet for adding lubricating oil being arranged on a side of the liquid storage box (12) away from the rotating body (6), a straight tube body (13) being symmetrically arranged connected to the side of the liquid storage box (12) away from the motor (5), a through hole being opened on a side of the straight tube body (13) close to the liquid storage box (12), the straight tube body (13) being connected to the liquid storage box (12) through the through hole, and the straight tube body (13) and the liquid storage box (12) being connected to each other through the through hole. A curved tube body (14) is connected between the side of the tube body (13) away from the liquid storage box (12) and the liquid flow tube (9); a piston rod (15) is slidably connected inside the straight tube body (13); the piston rod (15) and the liquid storage box (12) are slidably connected; the piston rod (15) extends away from the side of the straight tube body (13) and passes through the liquid storage box (12); a spring (16) is connected between the upper part of the piston rod (15) and the top of the liquid storage box (12).

3. A punching device for producing a flexible circuit board according to claim 2, characterized in that: It also includes a mounting plate (17), which is fixedly connected to the bottom of the motor (5) housing, and a plurality of arc blocks (18) are arranged along the circumferential direction at the bottom of the mounting plate (17). A sphere is arranged on the side of the piston rod (15) away from the liquid flow pipe (9), and the sphere and the arc block (18) are pressed and matched.

4. A punching device for producing a flexible circuit board according to claim 3, characterized in that: The invention also comprises a moving rod (19), the moving rod (19) is slidably connected to the inside of the straight tube body (13), a blocking block (20) is fixedly connected to the end of the moving rod (19), a connecting hole is opened at the bottom of the straight tube body (13), the blocking block (20) and the connecting hole are snap-fitted, and a second spring (21) is connected between the moving rod (19) and the straight tube body (13).

5. A punching device for producing a flexible circuit board according to claim 4, characterized in that: An extrusion nozzle is arranged on one side of the liquid flow pipe (9) close to the liquid outlet (8).

6. A punching device for producing a flexible circuit board according to claim 5, characterized in that: It also includes a wedge block 1 (22), which is slidably connected to the side of the piston head (151) close to the moving rod (19), a spring 3 (24) is connected between the side of the wedge block 1 (22) away from each other and the piston head (151), a plate body (23) is connected to the side of the wedge block 1 (22) close to each other, the plate body (23) and the moving rod (19) are pressed together, a wedge block 2 (25) is connected inside the straight tube body (13), the wedge block 2 (25) and the wedge block 1 (22) are pressed together, a cylindrical cavity is set inside the piston rod (15), and the moving rod (19) will be inserted into the cylindrical cavity.

7. A punching device for producing a flexible circuit board according to claim 6, characterized in that: The sliding column (26) is also included. The sliding column (26) is slidably connected in the piston rod (15). The bottom of the sliding column (26) is fixedly connected with a cone (27). The cone (27) and the moving rod (19) are pressed together. A groove is arranged on one side of the sliding column (26) close to the cone (27). The top of the plate body (23) is connected with a wedge block three (28). The wedge block three (28) and the cone (27) are pressed together.

8. A punching device for producing a flexible circuit board according to claim 7, characterized in that: The invention also comprises a guide column (29), which is fixedly connected to the top position of the piston rod (15), the guide column (29) and the sliding column (26) are slidably connected, a spring (30) is arranged between the top of the sliding column (26) and the top of the piston rod (15), and a plurality of air vents (31) are arranged on one side of the piston rod (15) close to the guide column (29).

9. A punching device for producing a flexible circuit board according to claim 8, characterized in that: It also includes electromagnetic valves (33), which are respectively arranged on the upper part of the liquid flow pipes (9), and the liquid flow pipes (9) are connected to the water inlet pipes (32).

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