Grinding device for carrying disc production

By designing a grinding device for load disk production, and using a motor and a hydraulic press to drive the grinding disc and grinding cutter head, the problem of low grinding efficiency in the prior art is solved, and efficient grinding and automated production of load disks are achieved.

CN223012698UActive Publication Date: 2025-06-24HENAN HUANYUCHANG ELECTRONIC TECH CO LTD
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Patent Information

Application Number
CN202421750657.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-23
Publication Date
2025-06-24
Estimated Expiration
2034-07-23

AI Technical Summary

Technical Problem

During the production of the disk, the prior art relies on workers to manually grind the grinding using files, resulting in inefficiency and increased worker workload.

Method used

A grinding device for the production of a load disk is designed, including a workbench, a motor case, a grinding disc, a hydraulic press and a grinding cutter head. The grinding disc is driven by a motor to rotate, and the hydraulic press drives the grinding cutter head to move, realizing automatic grinding of the load disk.

Benefits of technology

It improves the processing efficiency of the load disk, improves the grinding effect of the load disk, and reduces the workload and time of workers.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of machining equipment, and discloses a grinding device for carrying disc production, which comprises a working table, a motor is fixedly connected inside a motor box, a grinding disc is arranged outside the motor box, a hydraulic machine is fixedly connected to the upper surface of the working table, and a grinding tool bit is arranged at the bottom of a top plate. The grinding device has the following advantages and effects that a worker puts a carrying disc into the circular groove formed in the grinding disc, then the motor is started to drive the carrying disc placed in the circular groove to rotate, then the hydraulic machine is started, and the transverse plate moves on the upper surface of the workbench through sliding connection of the sliding groove and the sliding rail; when the grinding tool bit moves to the edge of the carrying disc, the rotating disc is rotated to enable the stud to drive the grinding tool bit to move downwards, the grinding tool bit moving downwards makes contact with the rotating carrying disc, the carrying disc starts to be ground, through the operation, the machining efficiency of the carrying disc is improved, and the effect that the grinding effect on the carrying disc is good is achieved.
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Description

Technical Field

[0001] The utility model relates to the technical field of machining equipment, in particular to a grinding device for carrier plate production. Background Technique

[0002] A carrier plate means transportation. It refers to a tool or device used for mechanized loading, unloading, handling, and stacking. It is a special form of packaging used to fix and protect goods. In the logistics industry, a carrier plate also refers to the goods in the hands of the shipper that need to be imported and exported by sea, air, or combined transportation, that is, the shipper's inquiry. For each logistics service requirement of each shipper, there needs to be more than one inquiry. In addition, a carrier plate can also refer to a silicon carbide carrier plate used in equipment such as a rapid annealing furnace. These carrier plates may be contaminated during the manufacturing process and therefore need to be replaced and cleaned regularly to ensure the normal operation of the equipment and the quality of the products.

[0003] Items often need to be stacked on the surface of the carrier plate. Therefore, it is necessary to ensure that the surface of the carrier plate has no burrs. During the production and processing of the carrier plate, the carrier plate needs to be ground. In actual production and processing, the grinding of the carrier plate mostly relies on workers holding files by hand to grind the carrier plate. Although this can also achieve the effect, it increases the workload of the workers and the production efficiency of the carrier plate is low. Therefore, improvement is needed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a grinding device for carrier plate production, which has the effects of good grinding effect on the carrier plate and high grinding efficiency of the carrier plate.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: A grinding device for carrier plate production includes a workbench. The bottom of the workbench is fixedly connected with support legs. The upper surface of the workbench is provided with a motor box. A rotating hole is opened inside the motor box. A motor is fixedly connected inside the motor box. A grinding disc is arranged outside the motor box. The output end of the motor penetrates into the rotating hole and is fixedly connected with the grinding disc. A circular groove is opened inside the grinding disc. A threaded groove hole is opened inside the circular groove. The upper surface of the workbench is fixedly connected with a slide rail. The upper surface of the workbench is fixedly connected with a hydraulic press. A cross plate is arranged outside the workbench. The bottom of the cross plate is fixedly connected with a chute. The chute is slidably connected with the slide rail. The output end of the hydraulic press is fixedly connected with the cross plate. The upper surface of the cross plate is fixedly connected with a base. The upper surface of the base is fixedly connected with a vertical rod. A cutter head support is fixedly connected to the outside of the vertical rod. A top plate is fixedly connected to the outside of the cutter head support. A grinding cutter head is arranged at the bottom of the top plate. A threaded hole is opened inside the top plate. A turntable is arranged outside the top plate. A stud is fixedly connected to the bottom of the turntable. The stud penetrates into the threaded hole and is fixedly connected with the grinding cutter head.

[0006] By adopting the above technical solution, the worker places the carrier plate inside the circular groove opened inside the grinding plate. Then, the motor is started and begins to rotate. The output end of the motor drives the grinding plate to rotate, thereby driving the rotation of the carrier plate placed inside the circular groove. Next, the hydraulic press is started and begins to work. The output end of the hydraulic press drives the cross plate to move. Through the sliding connection between the sliding groove and the sliding rail, the cross plate moves on the upper surface of the workbench, causing the grinding cutter head to move towards the grinding plate. When the grinding cutter head moves to the edge of the carrier plate, the grinding cutter head and the edge of the carrier plate complete the tool alignment. After the tool alignment is completed, the turntable is rotated to drive the stud to drive the grinding cutter head to move downward. The downward-moving grinding cutter head contacts the rotating carrier plate, and the grinding of the carrier plate begins. Through the power provided by the hydraulic press, the grinding cutter head grinds the entire upper surface of the carrier plate. Through the above operations, the processing efficiency of the carrier plate is improved, and the excellent grinding effect of the carrier plate is achieved.

[0007] A further setting of the present utility model is that: a handle is fixedly connected to the upper surface of the turntable, and the number of the handles is two.

[0008] By adopting the above technical solution, the two handles facilitate the staff to rotate the turntable.

[0009] A further setting of the present utility model is that: a fixed bracket is arranged outside the base, one end of the fixed bracket is fixedly connected to the vertical rod, and the other end of the fixed bracket is fixedly connected to the cutter head bracket.

[0010] By adopting the above technical solution, the fixed bracket plays a role in supporting the cutter head bracket and the vertical rod.

[0011] A further setting of the present utility model is that: anti-collision balls are fixedly connected inside the sliding rail, and the number of the anti-collision balls is two.

[0012] By adopting the above technical solution, the two anti-collision balls prevent the cross plate from colliding with the frame of the sliding rail after being forced to move.

[0013] A further setting of the present utility model is that: a friction layer is arranged inside the circular groove, and the thickness of the friction layer is five centimeters.

[0014] By adopting the above technical solution, the five-centimeter friction layer increases the friction between the carrier plate and the circular groove, preventing the carrier plate from slipping inside the circular groove and not rotating when the grinding plate drives it to rotate.

[0015] A further setting of the present utility model is that: a bolt head is arranged outside the grinding plate, a threaded column is fixedly connected to the outside of the bolt head, an adjusting arc plate is arranged inside the circular groove, and the threaded column penetrates into the internal thread groove hole and is fixedly connected to the adjusting arc plate.

[0016] By adopting the above technical solution, when the sizes of the carrier plates are different, the adjusting arc piece can be clamped to the carrier plates with different sizes by rotating the bolt head, facilitating the rotation of the carrier plates with different sizes along with the rotation of the grinding plate.

[0017] A further setting of the present utility model is that a rubber plate is fixedly connected to the bottom of the motor box, and the thickness of the rubber plate is four centimeters.

[0018] By adopting the above technical solution, when the motor is working, it will generate a vibration force, driving the motor box to vibrate. The rubber plate prevents the vibrating motor box from damaging the upper surface of the workbench.

[0019] A further setting of the present utility model is that a limiting bracket is arranged outside the rubber plate. One end of the limiting bracket is fixedly connected to the motor box, and the other end of the limiting bracket is fixedly connected to the workbench.

[0020] By adopting the above technical solution, the limiting bracket plays a role in fixing the motor box, preventing the motor box from shifting after being stressed.

[0021] A further setting of the present utility model is that heat dissipation holes are formed inside the motor box, and the distances between every two of the heat dissipation holes are equal.

[0022] By adopting the above technical solution, when the motor is working, heat will be generated inside the motor box, and the heat dissipation holes dissipate the heat.

[0023] A further setting of the present utility model is that magnet blocks are arranged on the upper surface of the workbench, and a handle frame is arranged on the upper surface of the magnet blocks.

[0024] By adopting the above technical solution, the staff holds the handle frame and takes out the ground carrier plate from the inside of the circular groove through the magnetic attraction of the magnet blocks.

[0025] The beneficial effects of the present utility model are:

[0026] 1. In this utility model, through the settings among the workbench, support legs, motor box, rotating holes, motor, grinding disc, circular groove, threaded slot holes, slide rails, hydraulic press, cross plate, sliding grooves, base, vertical rod, cutter head support, top plate, grinding cutter head, threaded holes, turntable, and stud, the worker places the carrier plate inside the circular groove formed inside the grinding disc. Then, the motor is started, and the motor begins to rotate. The output end of the motor drives the grinding disc to rotate, thereby driving the rotation of the carrier plate placed inside the circular groove. Next, the hydraulic press is started, and the hydraulic press begins to operate. The output end of the hydraulic press drives the cross plate to move. Through the sliding connection between the sliding groove and the slide rail, the cross plate moves on the upper surface of the workbench, causing the grinding cutter head to move towards the grinding disc. When the grinding cutter head moves to the edge of the carrier plate, the grinding cutter head and the edge of the carrier plate complete the tool alignment. After the tool alignment is completed, the turntable is rotated, and the stud drives the grinding cutter head to move downward. The downward-moving grinding cutter head contacts the rotating carrier plate, and the grinding of the carrier plate begins. Through the power provided by the hydraulic press, the grinding cutter head grinds the entire upper surface of the carrier plate. Through the above operations, the processing efficiency of the carrier plate is improved, and the excellent grinding effect of the carrier plate is achieved.

[0027] 2. In this utility model, through the settings among the handle, fixed support, anti-collision ball, friction layer, bolt head, threaded column, adjusting arc piece, rubber plate, limiting support, heat dissipation holes, magnet block, and handle frame, the two handles facilitate the staff to rotate the turntable. The fixed support plays a supporting role for the cutter head support and the vertical rod. The two anti-collision balls prevent the cross plate from colliding with the frame of the slide rail after being stressed and moving. The five-centimeter friction layer increases the friction between the carrier plate and the circular groove, preventing the carrier plate from slipping inside the circular groove and not rotating when the grinding disc drives it to rotate. When the sizes of the carrier plates are different, the bolt head is rotated to make the adjusting arc piece clamp the carrier plates of different sizes, facilitating the rotation of the carrier plates of different sizes along with the rotation of the grinding disc. When the motor is working, it will generate vibration force and drive the motor box to vibrate. The rubber plate prevents the vibrating motor box from grinding the upper surface of the workbench. The limiting support plays a fixing role for the motor box, preventing the motor box from shifting after being stressed. When the motor is working, heat will be generated inside the motor box, and the heat dissipation holes dissipate heat for it. The staff holds the handle frame and takes out the ground carrier plate from the inside of the circular groove through the magnetic attraction of the magnet block. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of this utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic structural diagram of this utility model;

[0030] Figure 2 This is a schematic structural diagram of the motor and grinding disc of the present utility model;

[0031] Figure 3 For the present utility model Figure 1 An enlarged structural diagram of part A in it;

[0032] Figure 4 For the present utility model Figure 1 An enlarged structural diagram of part B in it.

[0033] In the figure, 1. Workbench; 2. Support leg; 3. Motor box; 4. Rotating hole; 5. Motor; 6. Grinding disc; 7. Circular groove; 8. Threaded slot hole; 9. Slide rail; 10. Hydraulic press; 11. Cross plate; 12. Chute; 13. Base; 14. Vertical rod; 15. Tool bit support; 16. Top plate; 17. Grinding tool bit; 18. Threaded hole; 19. Turntable; 20. Stud; 21. Handle; 22. Fixed support; 23. Anti-collision ball; 24. Friction layer; 25. Bolt head; 26. Threaded column; 27. Adjusting arc piece; 28. Rubber plate; 29. Limit support; 30. Heat dissipation hole; 31. Magnet block; 32. Handle frame. Specific embodiments

[0034] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0035] Refer to Figures 1-4, A grinding device for the production of carrier trays, including a workbench 1. The bottom of the workbench 1 is fixedly connected with support legs 2. The upper surface of the workbench 1 is provided with a motor box 3. A rotating hole 4 is opened inside the motor box 3. A motor 5 is fixedly connected inside the motor box 3. The outside of the motor box 3 is provided with a grinding disc 6. The output end of the motor 5 penetrates into the inside of the rotating hole 4 and is fixedly connected with the grinding disc 6. A circular groove 7 is opened inside the grinding disc 6. A threaded groove hole 8 is opened inside the circular groove 7. The upper surface of the workbench 1 is fixedly connected with a slide rail 9. The upper surface of the workbench 1 is fixedly connected with a hydraulic press 10. The outside of the workbench 1 is provided with a cross plate 11. The bottom of the cross plate 11 is fixedly connected with a chute 12. The chute 12 is slidably connected with the slide rail 9. The output end of the hydraulic press 10 is fixedly connected with the cross plate 11. The upper surface of the cross plate 11 is fixedly connected with a base 13. The upper surface of the base 13 is fixedly connected with a vertical rod 14. A cutter head support 15 is fixedly connected to the outside of the vertical rod 14. A top plate 16 is fixedly connected to the outside of the cutter head support 15. A grinding cutter head 17 is arranged at the bottom of the top plate 16. A threaded hole 18 is opened inside the top plate 16. A turntable 19 is arranged outside the top plate 16. A stud 20 is fixedly connected to the bottom of the turntable 19. The stud 20 penetrates into the inside of the threaded hole 18 and is fixedly connected with the grinding cutter head 17. The worker places the carrier tray inside the circular groove 7 opened inside the grinding disc 6. Then start the motor 5, and the motor 5 starts to rotate. The output end of the motor 5 drives the grinding disc 6 to rotate, thereby driving the rotation of the carrier tray placed inside the circular groove 7. Then start the hydraulic press 10, and the hydraulic press 10 starts to work. The output end of the hydraulic press 10 drives the cross plate 11 to move. Through the sliding connection between the chute 12 and the slide rail 9, the cross plate 11 moves on the upper surface of the workbench 1, making the grinding cutter head 17 move towards the grinding disc 6. When the grinding cutter head 17 moves to the edge of the carrier tray, let the grinding cutter head 17 complete the tool alignment with the edge of the carrier tray. After the tool alignment is completed, rotate the turntable 19 to make the stud drive the grinding cutter head 17 to move downward. The downward moving grinding cutter head 17 contacts the rotating carrier tray, and starts to grind the carrier tray. Through the power provided by the hydraulic press 10, the grinding cutter head 17 grinds the entire upper surface of the carrier tray. Through the above operations, the processing efficiency of the carrier tray is improved, and the excellent grinding effect of the carrier tray is achieved. A handle 21 is fixedly connected to the upper surface of the turntable 19. The number of the handles 21 is two. The two handles 21 facilitate the staff to rotate the turntable 19. A fixed bracket 22 is arranged outside the base 13. One end of the fixed bracket 22 is fixedly connected with the vertical rod 14, and the other end of the fixed bracket 22 is fixedly connected with the cutter head support 15. The fixed bracket 22 plays a supporting role for the cutter head support 15 and the vertical rod 14. Anti-collision balls 23 are fixedly connected inside the slide rail 9. The number of the anti-collision balls 23 is two. The two anti-collision balls 23 prevent the cross plate 11 from colliding with the frame of the slide rail 9 after being stressed and moving. A friction layer 24 is arranged inside the circular groove 7. The thickness of the friction layer 24 is five centimeters. The five-centimeter friction layer 24 increases the friction between the carrier tray and the circular groove 7.When preventing the grinding disc 6 from driving its rotation, the carrier plate does not slip inside the circular groove 7 and does not rotate along with it. An external bolt head 25 is provided on the outside of the grinding disc 6, and a threaded column 26 is fixedly connected to the outside of the bolt head 25. An adjusting arc piece 27 is provided inside the circular groove 7. The threaded column 26 penetrates into the threaded groove hole 8 and is fixedly connected to the adjusting arc piece 27. When the sizes of the carrier plates are different, rotate the bolt head 25 to make the adjusting arc piece 27 clamp the carrier plates with different sizes, facilitating the rotation of the carrier plates with different sizes along with the rotation of the grinding disc 6. A rubber plate 28 is fixedly connected to the bottom of the motor box 3, and the thickness of the rubber plate 28 is four centimeters. When the motor 5 is working, it will generate a vibration force, driving the motor box 3 to vibrate. The rubber plate 28 prevents the vibrating motor box 3 from damaging the upper surface of the workbench 1. A limiting bracket 29 is provided on the outside of the rubber plate 28. One end of the limiting bracket 29 is fixedly connected to the motor box 3, and the other end of the limiting bracket 29 is fixedly connected to the workbench 1. The limiting bracket 29 plays a role in fixing the motor box 3, preventing the motor box 3 from shifting after being stressed. Heat dissipation holes 30 are opened inside the motor box 3, and the distances between the heat dissipation holes 30 are all equal. When the motor 5 is working, heat will be generated inside the motor box 3, and the heat dissipation holes 30 dissipate heat for it. A magnet block 31 is provided on the upper surface of the workbench 1, and a handle frame 32 is provided on the upper surface of the magnet block 31. The staff holds the handle frame 32 and takes out the ground carrier plate from inside the circular groove 7 through the magnetic attraction of the magnet block 31.,

[0036] In the present utility model, a worker places a carrier plate inside a circular groove 7 formed inside a grinding plate 6. Then, the motor 5 is started. The motor 5 starts to rotate, and the output end of the motor 5 drives the grinding plate 6 to rotate, thereby driving the rotation of the carrier plate placed inside the circular groove 7. Next, the hydraulic press 10 is started. The hydraulic press 10 starts to work. The output end of the hydraulic press 10 drives the cross plate 11 to move. Through the sliding connection between the sliding groove 12 and the sliding rail 9, the cross plate 11 moves on the upper surface of the workbench 1, causing the grinding cutter head 17 to move towards the grinding plate 6. When the grinding cutter head 17 moves to the edge of the carrier plate, the grinding cutter head 17 and the edge of the carrier plate complete the tool alignment. After the tool alignment is completed, the turntable 19 is rotated to drive the stud to drive the grinding cutter head 17 to move downward. The downward-moving grinding cutter head 17 contacts the rotating carrier plate, and the grinding of the carrier plate begins. Through the power provided by the hydraulic press 10, the grinding cutter head 17 grinds the entire upper surface of the carrier plate. Through the above operations, the processing efficiency of the carrier plate is improved, and a good grinding effect on the carrier plate is achieved. The two grips 21 facilitate the worker to rotate the turntable 19. The fixed bracket 22 plays a supporting role for the cutter head bracket 15 and the vertical rod 14. The two anti-collision balls 23 prevent the cross plate 11 from colliding with the frame of the sliding rail 9 after being forced to move. The five-centimeter friction layer 24 increases the friction between the carrier plate and the circular groove 7, preventing the carrier plate from slipping inside the circular groove 7 and not rotating when the grinding plate 6 drives it to rotate. When the sizes of the carrier plates are different, the rotating bolt head 25 is used to make the adjusting arc plate 27 clamp the carrier plates of different sizes, facilitating the carrier plates of different sizes to rotate along with the rotation of the grinding plate 6. When the motor 5 is working, it will generate vibration force, driving the motor box 3 to vibrate. The rubber plate 28 prevents the vibrating motor box 3 from damaging the upper surface of the workbench 1. The limit bracket 29 plays a fixing role for the motor box 3, preventing the motor box 3 from shifting after being forced. When the motor 5 is working, heat will be generated inside the motor box 3, and the heat dissipation holes 30 dissipate heat for it. The worker holds the handle frame 32 and takes out the ground carrier plate from inside the circular groove 7 through the magnetic attraction of the magnet block 31.

[0037] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A grinding device for producing a carrier plate, comprising a workbench (1), characterized in that: The bottom of the workbench (1) is fixedly connected to a support leg (2); the upper surface of the workbench (1) is provided with a motor box (3); a rotating hole (4) is provided inside the motor box (3); a motor (5) is fixedly connected inside the motor box (3); a grinding disc (6) is provided outside the motor box (3); an output end of the motor (5) passes through the inside of the rotating hole (4) and is fixedly connected to the grinding disc (6); a circular groove (7) is provided inside the grinding disc (6); a threaded groove hole (8) is provided inside the circular groove (7); a slide rail (9) is fixedly connected to the upper surface of the workbench (1); a hydraulic press (10) is fixedly connected to the upper surface of the workbench (1); a horizontal plate (11) is provided outside the workbench (1); a slide groove is fixedly connected to the bottom of the horizontal plate (11). (12), the slide groove (12) is slidably connected to the slide rail (9), the output end of the hydraulic press (10) is fixedly connected to the horizontal plate (11), the upper surface of the horizontal plate (11) is fixedly connected to a base (13), the upper surface of the base (13) is fixedly connected to a vertical rod (14), the outside of the vertical rod (14) is fixedly connected to a cutter head bracket (15), the outside of the cutter head bracket (15) is fixedly connected to a top plate (16), the bottom of the top plate (16) is provided with a grinding cutter head (17), the inside of the top plate (16) is provided with a threaded hole (18), the outside of the top plate (16) is provided with a turntable (19), the bottom of the turntable (19) is fixedly connected to a stud (20), the stud (20) penetrates into the inside of the threaded hole (18) and is fixedly connected to the grinding cutter head (17).

2. A grinding device for carrier production according to claim 1, characterized in that: A handle (21) is fixedly connected to the upper surface of the rotating disk (19), and the number of the handles (21) is two.

3. A grinding device for carrier production according to claim 1, characterized in that: A fixed bracket (22) is disposed outside the base (13), one end of the fixed bracket (22) is fixedly connected to the vertical rod (14), and the other end of the fixed bracket (22) is fixedly connected to the cutter head bracket (15).

4. A grinding device for carrier production according to claim 1, characterized in that: An anti-collision ball (23) is fixedly connected to the interior of the slide rail (9), and the number of the anti-collision balls (23) is two.

5. The grinding device for producing a carrier according to claim 1, characterized in that: A friction layer (24) is provided inside the circular groove (7), and the thickness of the friction layer (24) is five centimeters.

6. A grinding device for producing a carrier according to claim 1, characterized in that: The grinding disc (6) is provided with a bolt head (25) on the outside, and a threaded column (26) is fixedly connected to the outside of the bolt head (25). An adjusting arc piece (27) is provided inside the circular groove (7), and the threaded column (26) penetrates into the inside of the threaded groove hole (8) and is fixedly connected to the adjusting arc piece (27).

7. A grinding device for producing a carrier according to claim 1, characterized in that: A rubber plate (28) is fixedly connected to the bottom of the motor box (3), and the thickness of the rubber plate (28) is four centimeters.

8. A grinding device for producing a carrier according to claim 7, characterized in that: A limiting bracket (29) is disposed outside the rubber plate (28), one end of the limiting bracket (29) is fixedly connected to the motor box (3), and the other end of the limiting bracket (29) is fixedly connected to the workbench (1).

9. The grinding device for producing a carrier according to claim 1, characterized in that: The motor box (3) is provided with heat dissipation holes (30) inside, and the distances between any two of the heat dissipation holes (30) are equal.

10. The grinding device for producing a carrier according to claim 1, characterized in that: A magnet block (31) is provided on the upper surface of the workbench (1), and a handle frame (32) is provided on the upper surface of the magnet block (31).