Punching equipment for motorcycle brake disc

Abstract

The punching equipment for the motorcycle brake disc comprises a female die and a workpiece, a plurality of negative pressure holes are formed in the female die and distributed around the center of the female die in a circumferential array mode, the bottom end of the female die is fixedly connected with a hollow negative pressure disc, and the outer end of the hollow negative pressure disc is fixedly connected with a first negative pressure pipe. An adsorption pipe is slidably connected to the inner wall of the female die, a plurality of adsorption holes are formed in the outer wall of the adsorption pipe and distributed around the center of the adsorption pipe in a circumferential array mode, and a hollow collecting disc is fixedly connected to the bottom end of the adsorption pipe. The punching precision is improved, workpiece deformation or deviation is reduced, burrs and lubricating oil residues in punched holes can be effectively absorbed, the surface quality and cleanliness of workpieces are improved, negative pressure is used for assisting discharging, the discharging efficiency can be remarkably improved, the workpiece damage risk is reduced, manual intervention is reduced, and operation safety is enhanced.

Description

Technical Field

[0001] The utility model relates to a punching device for a motorcycle brake disc, in particular to a punching device for a motorcycle brake disc applied in the technical field of brake disc processing. Background Art

[0002] In modern manufacturing, especially in the production of automobile and motorcycle parts, stamping is a very important process. The stamping process usually involves forming, cutting or punching metal sheets through dies. However, in this process, some technical difficulties are often encountered, such as unstable positioning of the workpiece during the stamping process, difficulty in burr removal, residual lubricant, and inconvenient unloading. These problems not only affect the quality of the workpiece, but also increase production costs and reduce production efficiency.

[0003] Traditional stamping equipment typically uses mechanical clamping devices to secure the workpiece. However, mechanical clamping can cause workpiece deformation or inaccurate positioning, a particularly significant problem during precision stamping. Furthermore, if burrs and residual lubricant on the workpiece surface are not promptly removed after stamping, the quality of subsequent processing steps can be compromised. During unloading, failure to effectively separate the workpiece from the die can lead to scratches or damage, further impacting product quality.

[0004] The specification of Chinese utility model patent CN215355657U discloses a rapid drilling device for a brake disc, comprising a base frame, a support seat mounted on the base frame for placing the brake disc, a clamping device mounted on the base frame and positioned around the support seat for clamping the brake disc, a fixing frame mounted on the base frame, and a punching device mounted on the fixing frame directly above the support seat for drilling holes in the brake disc. The punching device comprises a mounting plate, a turntable rotatably mounted on the bottom surface of the mounting plate, a driving mechanism mounted on the top surface of the mounting plate for driving the turntable to rotate, a plurality of transmission mechanisms evenly arranged along the circumference of the turntable, a plurality of punching drill bits mounted on the transmission mechanism, and a power device for driving the mounting plate to move up and down. One end of the transmission mechanism is slidably connected to the mounting plate and the other end is rotatably connected to the turntable; the power device is mounted between the mounting plate and the fixing frame. The utility model can simultaneously drill multiple holes in a brake disc, is simple to operate, has high drilling efficiency, and ensures processing accuracy.

[0005] Although the above design has improved the stamping efficiency and punching accuracy of the brake disc to a certain extent, it still has certain limitations, such as low positioning accuracy, uneven force, and lack of cleaning, lubrication and burr cleaning of the brake disc. Utility Model Content

[0006] In view of the above-mentioned existing technologies, the technical problem to be solved by the present invention is to provide a stamping device with high positioning accuracy and uniform force on the brake disc, while also having burr cleaning and cleaning and lubricating functions.

[0007] To solve the above problems, the present invention provides a punching device for a motorcycle brake disc, comprising a die and a workpiece, wherein the die is provided with a plurality of negative pressure holes, and the plurality of negative pressure holes are distributed in a circumferential array around the center of the die, the bottom end of the die is fixedly connected to a hollow negative pressure plate, the outer end of the hollow negative pressure plate is fixedly connected to a first negative pressure tube, the inner wall of the die is slidably connected to an adsorption tube, the outer wall of the adsorption tube is provided with a plurality of suction holes, and the suction holes are distributed in a circumferential array around the center of the adsorption tube, the bottom end of the adsorption tube is fixedly connected to a hollow collecting plate, and the hollow collecting plate and the adsorption tube are connected to each other, the outer end of the hollow collecting plate is fixedly connected to a second negative pressure tube, the inner end of the die is fixedly connected to a plurality of first guide rods, the inner end of the hollow collecting plate is slidably connected to the outer ends of the plurality of first guide rods, the outer ends of the plurality of first guide rods are all slidably connected to a first return spring, the bottom end of the first guide rod is fixedly connected to a bottom plate, the top end of the first return spring is abutted against the hollow collecting plate, and the bottom end of the first return spring is abutted against the bottom plate.

[0008] As a further improvement of the present application, the outer end of the first guide rod is slidably connected to the upper die base, the bottom end of the upper die base is fixedly connected to a plurality of punches, the plurality of punches are distributed in a circular array around the center of the upper die base, and the top end of the upper die base is fixedly connected to a punching rod.

[0009] As a further improvement of the present application, the outer end of the first guide rod is slidably connected to a cleaning and lubrication assembly, which includes a reset plate slidably connected to the first guide rod, and the bottom end is fixedly connected to multiple second guide rods, which pass through the upper mold base and are slidably connected to the upper mold base.

[0010] As a further improvement of the present application, the bottom end of the second guide rod is fixedly connected to a cleaning lubrication plate, the reset plate and the cleaning lubrication plate are respectively located on the upper and lower sides of the upper mold base, and the inner wall of the cleaning lubrication plate is fixedly connected to a partition plate, which divides the cleaning lubrication plate into two upper and lower cavities. The upper cavity of the cleaning lubrication plate is an oil storage cavity, and the lower cavity of the cleaning lubrication plate is a cleaning cavity. The inner wall of the cleaning cavity is fixedly connected to a third negative pressure tube extending to the outside.

[0011] As another improvement of the present application, the punch passes through the cleaning lubrication tray, and the interior of the cleaning lubrication tray is provided with a plurality of through holes extending to the outside for the punch to pass through, and the inner wall of the through hole is provided with a plurality of lubrication holes, and the plurality of lubrication holes are distributed in a circular array around the axis of the through hole, and the bottom end of the cleaning lubrication tray is provided with a plurality of evenly distributed cleaning holes.

[0012] As another improved supplement to the present application, the outer end of the first guide rod is fixedly connected to the limiting block, the bottom end of the limiting block contacts the upper end of the reset plate, the outer end of the stamping rod is slidably connected to the second reset spring, the top end of the second reset spring is against the lower end of the reset plate, and the bottom end of the second reset spring is against the upper mold base.

[0013] As another improved supplement of the present application, the top end of the first guide rod is fixedly connected to a top plate, the inner end of the top plate is slidably connected to a press, and the bottom end of the press is fixedly connected to the punching rod.

[0014] In summary, this solution has the following beneficial effects:

[0015] 1. Improve positioning accuracy and stamping accuracy; through multiple evenly distributed negative pressure holes, the workpiece is firmly adsorbed on the die, ensuring that the position of the workpiece remains unchanged during the stamping process, reducing positioning errors and improving punching accuracy. Multiple negative pressure holes can provide evenly distributed adsorption force, so that the workpiece is subjected to uniform force during the stamping process, reducing deformation or offset of the workpiece caused by uneven local force.

[0016] 2. Reduce burrs and lubricant residue; absorb burrs and residual lubricant on the inner wall of the punching hole of the workpiece through the suction hole, reduce cleaning time and labor costs, improve the surface quality and cleanliness of the workpiece, and the cleaning cavity generates negative pressure on the workpiece surface to absorb dust and residue, further improve the cleanliness of the workpiece and reduce quality problems in subsequent processing.

[0017] 3. Improve unloading efficiency and operational safety; by cleaning the cavity to assist unloading, the time and labor costs in the unloading process are reduced, the unloading efficiency is improved, the workpiece is sucked by negative pressure, and the damage to the workpiece caused by direct unloading with hands or other tools is avoided, the possibility of damage to the workpiece during the unloading process is reduced, and the quality of the workpiece is improved. Through the automated unloading system, the opportunity for operators to directly contact the workpiece is reduced, the risk of operator injury is reduced, and operational safety is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the first partial view of this application;

[0019] Figure 2 This is the second partial view of this application;

[0020] Figure 3 This is the third partial view of this application;

[0021] Figure 4 This is the fourth partial view of this application;

[0022] Figure 5 This is a stamping state diagram of this application;

[0023] Figure 6This is a diagram of the burr cleaning state of this application;

[0024] Figure 7 Cleaning status diagram for this application;

[0025] Figure 8 This is the auxiliary unloading state diagram for this application;

[0026] Figure 9 This is a schematic diagram of the overall structure of this application.

[0027] Description of the numbers in the figure:

[0028] 1. Die; 2. Workpiece; 3. Negative pressure hole; 4. Hollow negative pressure plate; 5. Adsorption tube; 6. Suction hole; 7. Hollow collecting plate; 8. First guide rod; 9. First return spring; 10. Bottom plate; 11. Upper die base; 12. Punch; 13. Punch rod; 14. Return plate; 15. Second guide rod; 16. Cleaning and lubricating plate; 17. Partition plate; 18. Oil storage chamber; 19. Cleaning cavity; 20. Lubrication hole; 21. Cleaning hole; 22. Limit block; 23. Second return spring; 24. Top plate; 25. Press. DETAILED DESCRIPTION

[0029] The following describes three implementation methods of the present application in detail with reference to the accompanying drawings.

[0030] The first implementation method:

[0031] Figure 1-9 Shown is a punching device for motorcycle brake discs:

[0032] A plurality of negative pressure holes 3 are provided inside the die 1, and these holes are distributed in a circular array around the center of the die 1. A hollow negative pressure plate 4 is fixedly connected to the bottom end of the die 1. The plurality of negative pressure holes 3 can provide evenly distributed adsorption force, so that the force exerted on the workpiece 2 during the stamping process is even, reducing the deformation or offset of the workpiece 2 caused by local uneven force. The negative pressure holes 3 can ensure that the position of the workpiece 2 remains unchanged during the stamping process, reduce positioning errors, and improve punching accuracy. The hollow negative pressure plate 4 is fixedly connected to the bottom end of the die 1, and a first negative pressure tube is fixedly connected to the outer end. Negative pressure is introduced through the first negative pressure tube to ensure that the negative pressure can be evenly transmitted to each negative pressure hole 3, thereby improving the transmission efficiency of the negative pressure and ensuring that the workpiece 2 is firmly adsorbed on the surface of the die 1. A plurality of adsorption holes 3 are provided on the outer wall of the adsorption tube 5. Hole 6, the suction holes 6 are distributed in a circular array around the center of the adsorption tube 5, the suction holes 6 can provide suction, absorb burrs and lubricating oil, reduce cleaning time and labor costs, and improve production efficiency. The suction holes 6 can clean burrs more thoroughly, reduce the problem of burr residue, and improve the surface quality of the workpiece 2. The suction holes 6 can absorb lubricating oil at the same time to prevent it from remaining on the surface of the workpiece 2, thereby improving the cleanliness of the workpiece 2. The hollow collection tray 7 is fixedly connected to the bottom end of the adsorption tube 5, and the hollow collection tray 7 is interconnected with the adsorption tube 5. A second negative pressure tube is fixedly connected to the outer end. The hollow collection tray 7 can store burrs and lubricating oil absorbed by the adsorption tube 5, which is convenient for regular cleaning of residues in the hollow collection tray 7, ensuring that the adsorption tube 5 can move up and down smoothly to complete the cleaning task of the suction holes 6;

[0033] The first guide rod 8 is fixedly connected to the inner end of the die 1, and the outer end of the first guide rod 8 is slidably connected to the inner end of the hollow collecting tray 7. The outer end of the first guide rod 8 is slidably connected to the first return spring 9. The first guide rod 8 ensures that the adsorption tube 5 and the hollow collecting tray 7 can move up and down smoothly, improves the movement stability of the adsorption tube 5 and the hollow collecting tray 7, and facilitates the control of the movement trajectory of the adsorption tube 5 and the hollow collecting tray 7. The top end of the first return spring 9 is against the hollow collecting tray 7, and the bottom end of the first return spring 9 is against the bottom plate 10. The first return spring 9 provides a restoring force to ensure that the adsorption tube 5 and the hollow collecting tray 7 can be reset, and the bottom plate 10 is fixedly connected It is connected to the bottom end of the first guide rod 8, and the bottom end of the first return spring 9 is against it. The position of the first guide rod 8 is fixed by the bottom plate 10 to ensure the stable support of the first return spring 9, which is convenient for controlling the up and down movement of the adsorption tube 5 and the hollow collection tray 7, and improving the stability of the entire device. Through the above structural design, the positioning accuracy of the workpiece 2 during the stamping process can be significantly improved, burrs and lubricating oil residue can be reduced, the surface quality and cleanliness of the workpiece 2 can be improved, and the damage during the unloading process can be reduced and the unloading efficiency can be improved. In actual application, it is necessary to select appropriate structural design and system configuration according to the specific situation, and carry out appropriate maintenance and management.

[0034] Second implementation method:

[0035] Figure 1-9 Shown is a punching device for motorcycle brake discs:

[0036] The upper die base 11 is connected to the first guide rod 8 by sliding, ensuring that the upper die base 11 can move up and down smoothly. By fixedly connecting the punch rod 13, the upper die base 11 can move synchronously with the press 25 to achieve accurate punching action. The multiple punches 12 are distributed in a circular array, which can ensure that the force distribution during the punching process is uniform, reduce the deformation of the workpiece 2, improve the punching accuracy, and ensure that each punch 12 can accurately perform the punching operation. The sliding connection between the reset plate 14 and the second guide rod 15 ensures that the cleaning and lubrication assembly can move up and down smoothly, and the cleaning and lubrication assembly can follow the punch 12. The reset plate 14 is connected to the first guide rod 8 in a sliding manner to ensure that the reset plate 14 can move up and down smoothly, thereby improving the movement stability of the reset plate 14. The bottom end is fixedly connected to the reset plate 14. The reset plate 14 is connected to the first guide rod 8 in a sliding manner to ensure that the reset plate 14 can move up and down smoothly, thereby improving its movement stability. The second guide rod 15 is fixedly connected to the reset plate 14 and passes through the upper die base 11 and is slidably connected to the upper die base 11 to ensure that the reset plate 14 can move up and down smoothly, thereby improving its movement stability.

[0037] The cleaning lubrication tray 16 is divided into an oil storage chamber 18 and a cleaning cavity 19 by a partition plate 17, thereby realizing the separation of the oil storage and cleaning functions. The design of the cleaning lubrication tray 16 makes the oil storage chamber 18 and the cleaning cavity 19 independent of each other and do not interfere with each other. The oil storage chamber 18 provides storage space for lubricating oil to ensure the lubrication needs of the punch 12 during the stamping process. The lubricating oil in the oil storage chamber 18 reduces the friction between the punch 12 and the workpiece 2, thereby extending the service life of the punch 12. The cleaning cavity 19 is connected to the external negative pressure system through the third negative pressure pipe to generate negative pressure, so as to absorb dust and residue on the surface of the workpiece 2, thereby improving the cleanliness of the surface of the workpiece 2 and reducing quality problems in subsequent processing. Negative pressure is generated on the surface of the workpiece 2 through the cleaning cavity 19 to absorb dust and residue, thereby improving the cleanliness of the workpiece 2.

[0038] By opening a plurality of through holes, it is ensured that the lubricating oil can flow from the oil storage cavity 18 into the punch 12 through these holes, and the lubricating holes 20 ensure that the lubricating oil can be evenly distributed on the surface of the punch 12 to reduce friction. The lubricating holes 20 are distributed in a circumferential array to ensure that the lubricating oil can flow out evenly from all directions to improve the lubrication effect. The cleaning holes 21 ensure that the negative pressure in the cleaning cavity 19 can act evenly on the surface of the workpiece 2 to absorb dust and residue. The cleaning holes 21 are evenly distributed to ensure that the negative pressure acts evenly and improve the cleaning effect.

[0039] The contact between the limit block 22 and the reset plate 14 ensures that the position of the reset plate 14 is limited when it moves up and down, preventing the reset plate 14 from excessive movement and protecting the equipment from damage. The second reset spring 23 provides a restoring force to ensure that the reset plate 14 can be reset after the stamping is completed, reducing the time required for reset, improving production efficiency, and improving the movement stability of the reset plate 14 to ensure that it can be reset smoothly.

[0040] The top plate 24 is fixedly connected to the top end of the first guide rod 8. The top plate 24 serves as a bridge connecting the first guide rod 8 and the press 25, providing a stable support point. The top plate 24 is slidably connected to the press 25, ensuring that the press 25 can move up and down smoothly, thereby improving the stability of its movement. The press 25 is slidably connected to the top plate 24, ensuring that the press 25 can move up and down smoothly. The bottom end of the press 25 is fixedly connected to the punching rod 13, ensuring the stability and accuracy of the punching action, improving the stability during the punching process, and ensuring that the punching action can be accurately performed.

[0041] The third implementation method:

[0042] Figure 1-9 Shown is a punching device for motorcycle brake discs:

[0043] The method of using the method includes the following steps:

[0044] S1, multi-point clamping, such as Figure 5 As shown, when the workpiece 2 is placed on the top of the die 1 through the loading device, the control system controls the generation of negative pressure, and the negative pressure enters the hollow negative pressure plate 4 through the first negative pressure tube at the outer end of the hollow negative pressure plate 4, and through a plurality of evenly distributed negative pressure holes 3, the workpiece 2 is adsorbed on the surface of the die 1 to complete multi-point adsorption. At the same time, the positioning shaft on the die 1 is inserted into the center hole of the workpiece 2 to assist in positioning. After clamping is completed, the press 25 drives the upper die base 11 to punch the workpiece 2.

[0045] By firmly adsorbing the workpiece 2 on the die 1 through the negative pressure holes 3, it can be ensured that the position of the workpiece 2 remains unchanged during the stamping process, reducing positioning errors, improving the accuracy of punching, and reducing the vibration and movement of the workpiece 2 during the stamping process. Multiple negative pressure holes 3 can provide evenly distributed adsorption force, so that the force applied to the workpiece 2 during the stamping process is uniform, reducing the deformation or offset of the workpiece 2 caused by local uneven force, and improving the stamping accuracy.

[0046] S2, burr cleaning, such as Figure 6As shown, after the clamping is completed, the control press 25 drives the upper die base 11 to move downward along the first guide rod 8, and at the same time drives the cleaning and lubrication assembly to move downward until the clean cavity 19 contacts the workpiece 2, and the punch 12 continues to move downward. After stamping, the press 25 drives the upper die base 11 to move upward along the first guide rod 8, and stops when the punch 12 moves to the top of the clean cavity 19. At this time, the compressed first return spring 9 pushes the first return spring 9 upward, and the first return spring 9 drives the adsorption tube 5 to move upward along the die 1, and stops when the top of the hollow collecting plate 7 moves to the hollow negative pressure plate 4. The adsorption tube 5 stops moving and rises to the surface of the workpiece 2 and exceeds the surface of the workpiece 2 by a certain distance. At this time, the control system controls the air pump system to generate negative pressure, which is transmitted to the adsorption tube 5 through the second negative pressure tube. At the same time, the punch 12 is driven to move downward, and the punch 12 pushes the adsorption tube 5 to move downward. The first return spring 9 is compressed and contracts, driving the hollow collecting plate 7 to move downward. The burrs and residual lubricating oil on the inner wall of the punching hole of the workpiece 2 are sucked away through the suction hole 6 at the outer end of the adsorption tube 5, thereby achieving the effect of cleaning the burrs. The burrs and lubricating oil absorbed by the adsorption tube 5 will be stored in the hollow collecting plate 7, which can be cleaned regularly.

[0047] The suction hole 6 can provide suction to absorb burrs and lubricating oil, reducing cleaning time and labor costs, and improving production efficiency. By absorbing burrs through the suction hole 6, the burrs can be cleaned more thoroughly, reducing the problem of burr residue, and improving the surface quality of the workpiece 2. The micropores can absorb lubricating oil at the same time to prevent it from remaining on the surface of the workpiece 2, reducing the problem of lubricating oil residue, and improving the cleanliness of the workpiece 2. By absorbing burrs and lubricating oil through the suction hole 6, secondary damage to the workpiece 2 can be reduced.

[0048] S3, unloading assistance, such as Figure 7 and Figure 8 As shown, when the burrs and lubricating oil on the surface of the punching hole of the workpiece 2 are absorbed, the press 25 drives the punch 12 to move upward. When the cleaning cavity 19 moves to the top of the workpiece 2, the air pump system is controlled to generate negative pressure and transmit it to the cleaning cavity 19 through the third negative pressure pipe. The cleaning cavity 19 absorbs the dust, residue, etc. remaining on the surface of the workpiece 2. After cleaning, the first return spring 9 of the die 1 is in close contact with the surface of the workpiece 2 to suck the workpiece 2. Then the press 25 is controlled to drive the punch 12 to move upward to assist in unloading. In the process of the punch 12 moving downward, the lubricating oil in the oil storage cavity 18 seeps out through the lubrication hole 20 to lubricate the punch 12.

[0049] Assisted unloading through the cleaning cavity 19 reduces the time and labor costs in the unloading process and improves the unloading efficiency. The cleaning cavity 19 generates negative pressure above the workpiece 2 to suck away dust and residue on the surface of the workpiece 2, thereby improving the cleanliness of the workpiece 2 and reducing subsequent processing problems caused by residues. The workpiece 2 is sucked by negative pressure, avoiding damage to the workpiece 2 caused by direct unloading with hands or other tools, reducing the possibility of damage to the workpiece 2 during the unloading process, and improving the quality of the workpiece 2.

[0050] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A punching device for motorcycle brake discs, characterized by: The invention comprises a die (1) and a workpiece (2), wherein the die (1) is provided with a plurality of negative pressure holes (3), and the plurality of negative pressure holes (3) are distributed in a circumferential array around the center of the die (1), the bottom end of the die (1) is fixedly connected to a hollow negative pressure plate (4), the outer end of the hollow negative pressure plate (4) is fixedly connected to a first negative pressure tube, the inner wall of the die (1) is slidably connected to an adsorption tube (5), the outer wall of the adsorption tube (5) is provided with a plurality of suction holes (6), and the suction holes (6) are distributed in a circumferential array around the center of the adsorption tube (5), the bottom end of the adsorption tube (5) is fixedly connected to a hollow collecting plate (7), The hollow collecting tray (7) and the adsorption tube (5) are connected to each other, the outer end of the hollow collecting tray (7) is fixedly connected to the second negative pressure tube, the inner end of the die (1) is fixedly connected to a plurality of first guide rods (8), the inner end of the hollow collecting tray (7) is slidably connected to the outer ends of the plurality of first guide rods (8), the outer ends of the plurality of first guide rods (8) are all slidably connected to a first return spring (9), the bottom end of the first guide rod (8) is fixedly connected to the bottom plate (10), the top end of the first return spring (9) is against the hollow collecting tray (7), and the bottom end of the first return spring (9) is against the bottom plate (10).

2. The punching device for motorcycle brake disc according to claim 1, characterized in that: The outer end of the first guide rod (8) is slidably connected to an upper die base (11), the bottom end of the upper die base (11) is fixedly connected to a plurality of punches (12), the plurality of punches (12) are distributed in a circular array around the center of the upper die base (11), and the top end of the upper die base (11) is fixedly connected to a punching rod (13).

3. The punching device for motorcycle brake disc according to claim 1, characterized in that: The outer end of the first guide rod (8) is slidably connected to a cleaning and lubricating assembly, and the cleaning and lubricating assembly includes a reset plate (14) slidably connected to the first guide rod (8). The bottom end is fixedly connected to a plurality of second guide rods (15), and the second guide rods (15) pass through the upper mold base (11) and are slidably connected to the upper mold base (11).

4. The punching device for motorcycle brake disc according to claim 3, characterized in that: The bottom end of the second guide rod (15) is fixedly connected to a cleaning lubrication disk (16), the reset plate (14) and the cleaning lubrication disk (16) are respectively located on the upper and lower sides of the upper die base (11), the inner wall of the cleaning lubrication disk (16) is fixedly connected to a partition plate (17), and the partition plate (17) divides the cleaning lubrication disk (16) into two upper and lower cavities, the upper cavity of the cleaning lubrication disk (16) is an oil storage cavity (18), and the lower cavity of the cleaning lubrication disk (16) is a cleaning cavity (19), and the inner wall of the cleaning cavity (19) is fixedly connected to a third negative pressure pipe extending to the outside.

5. The punching device for motorcycle brake disc according to claim 2, characterized in that: The punch (12) passes through the cleaning lubricating plate (16), and the interior of the cleaning lubricating plate (16) is provided with a plurality of through holes extending to the outside for the punch (12) to pass through. The inner wall of the through hole is provided with a plurality of lubrication holes (20), and the plurality of lubrication holes (20) are distributed in a circular array around the axis of the through hole. The bottom end of the cleaning lubricating plate (16) is provided with a plurality of evenly distributed cleaning holes (21).

6. The punching device for a motorcycle brake disc according to claim 2, characterized in that: The outer end of the first guide rod (8) is fixedly connected to a limit block (22), the bottom end of the limit block (22) contacts the upper end of the reset plate (14), the outer end of the punch rod (13) is slidably connected to a second reset spring (23), the top end of the second reset spring (23) abuts against the lower end of the reset plate (14), and the bottom end of the second reset spring (23) abuts against the upper die base (11).

7. The punching device for a motorcycle brake disc according to claim 1, characterized in that: The top end of the first guide rod (8) is fixedly connected to a top plate (24), the inner end of the top plate (24) is slidably connected to a press (25), and the bottom end of the press (25) is fixedly connected to a punching rod (13).

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