Graphite polishing device

The automated graphite grinding device addresses inefficiencies and health risks in manual sandpaper methods by using a lift mechanism and clamping system for consistent and precise grinding, enhancing efficiency and safety while reducing labor costs and environmental impact.

CN223099593UActive Publication Date: 2025-07-15JIANGSU ETERN OPTICAL FIBER TECH CO LTD
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Patent Information

Application Number
CN202422185926.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-06
Publication Date
2025-07-15
Estimated Expiration
2034-09-06

AI Technical Summary

Technical Problem

Existing manual grinding graphite products have problems such as low efficiency, high health risks and unstable quality, and cannot meet the needs of modern production.

Method used

Automatic graphite grinding device, including brackets, milling cutters and lifting components, drive milling cutters to move on the surface of graphite products through lifting components for cutting and grinding, and fixing the graphite products in combination with fixing parts. The height and speed of the milling cutter are controlled using motors and electric switches. They are equipped with cleaning components and collection boxes to clean powder.

Benefits of technology

It improves grinding efficiency and product quality, improves operating environment and safety, reduces labor costs and health risks, and ensures consistency and accuracy of the grinding process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a graphite polishing device, and relates to the technical field of graphite machining, the graphite polishing device comprises a support, a milling cutter and a lifting assembly, the lifting assembly is arranged on the support and connected with the milling cutter to drive the milling cutter to move, the support is provided with a base, and the base is used for placing a graphite product; the device further comprises a fixing piece, and the fixing piece fixes the graphite product on the base. Through cooperative use of the lifting assembly and the milling cutter, the consistency and precision of the grinding process are ensured, the more uniform grinding effect is provided, surface unevenness and defects are reduced, the production efficiency and the product quality are improved, meanwhile, the operation environment and safety are improved, and compared with traditional manual grinding, the grinding efficiency is improved. According to the automatic milling cutter grinding device, the grinding efficiency is remarkably improved, the dependence on manual operation is reduced, so that the labor cost is reduced, direct contact between operators and dust can be reduced, the health risk is reduced, and the working safety is enhanced.
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Description

Technical Field

[0001] This application relates to the technical field of graphite processing, and in particular to a graphite grinding device. Background Art

[0002] In the manufacturing process of graphite products, petroleum coke and needle coke are mainly used as raw materials, and coal tar pitch is used as a binder. It is made through multiple complex steps such as calcination, batching, kneading, molding, roasting, graphitization, and machining. In order to ensure the smooth surface of graphite products and meet technical specifications, they must be ground.

[0003] Currently, the surface grinding of graphite products mainly relies on manual operation, usually using sandpaper for treatment. This traditional manual grinding method has the following problems: 1. Low efficiency and time-consuming: Manual grinding not only has a high work intensity but also takes a long time, unable to meet the requirements of modern production for high efficiency. The grinding of each graphite piece takes a long time, extending the production cycle and limiting the improvement of production capacity; 2. There are health and environmental risks: The graphite dust generated during manual grinding poses a serious threat to the health of operators. Prolonged inhalation of this dust may lead to respiratory diseases. In addition, the diffusion of dust will pollute the production environment, increasing the costs of cleaning and ventilation; 3. The processing quality is unstable: The quality of manual grinding is difficult to control and is often affected by the technical level of the operators. Due to the difficulty in maintaining consistent grinding standards, frequent abnormalities occur in graphite pieces during actual use, such as broken fibers and unqualified performance indicators, which in turn affect the overall product quality and service life.

[0004] In summary, the existing manual grinding method cannot meet the needs of modern production. There is an urgent need to develop a more efficient and environmentally friendly automated grinding technology to improve the processing quality, reduce production costs, improve the operating environment, and reduce safety risks. Utility Model Content

[0005] In order to develop a more efficient and environmentally friendly automated grinding technology, this application provides a graphite grinding device.

[0006] The graphite grinding device provided by this application adopts the following technical solutions:

[0007] A graphite grinding device includes a bracket, a milling cutter, and a lifting component. The lifting component is arranged on the bracket and is connected to the milling cutter to drive the milling cutter to move. The bracket is provided with a base for placing the graphite product; it also includes a fixing component for fixing the graphite product on the base.

[0008] By adopting the above technical solution, during use, place the graphite product on the base of the device, fix the graphite product on the base using the fixing member, and drive the milling cutter to move on the surface of the graphite product through the lifting assembly. The milling cutter cuts and grinds on the surface of the graphite product to remove surface unevenness and burrs. During this process, the lifting assembly enables the milling cutter to grind in different areas of the graphite product to ensure a smooth and consistent surface; the combined use of the lifting assembly and the milling cutter ensures the consistency and precision of the grinding process, provides a more uniform grinding effect, reduces the occurrence of surface unevenness and defects, improves production efficiency and product quality, and at the same time improves the operating environment and safety. Compared with traditional manual grinding, the automated milling cutter grinding device significantly improves the grinding efficiency, reduces the dependence on manual operation, thereby reducing labor costs, and can reduce the direct contact between operators and dust, thus reducing health risks and enhancing work safety.

[0009] In a specific feasible implementation, the lifting assembly includes a motor provided on the bracket, the motor is connected with a lifting rod, and one side of the lifting rod away from the motor is connected with the milling cutter.

[0010] By adopting the above technical solution, the motor-driven lifting rod system can accurately adjust the height and position of the milling cutter, provides accurate and stable control for the graphite grinding device, improves the grinding efficiency and product quality, and at the same time reduces labor costs and maintenance risks.

[0011] In a specific feasible implementation, it further includes an electric switch and a speed adjustment button, and both the electric switch and the speed adjustment button are electrically connected to the motor.

[0012] By adopting the above technical solution, the electric switch and the speed adjustment button make the operation more convenient and intuitive, reduce the operation complexity, and improve the user experience; the electric switch provides a simple start-stop operation to ensure the quick start and stop of the device, improving work efficiency; the speed adjustment button allows the operator to precisely control the speed of the milling cutter according to specific needs, thereby optimizing the grinding process and adapting to different types and sizes of graphite products.

[0013] In a specific feasible implementation, the fixing member includes a clamp, the clamp is provided on the bracket, and the clamp clamps the graphite product to fix it on the base.

[0014] By adopting the above technical solution, the design of the clamp enables the graphite product to be fixed and unloaded quickly and conveniently, thereby saving loading and unloading time and improving work efficiency. The clamp can firmly fix the graphite product on the base to avoid the movement or vibration of the graphite product during the processing, thereby improving the stability of the processing.

[0015] In a specific feasible implementation, a rubber pad is provided on the clamping surface of the clamp, and the clamp contacts the graphite product through the rubber pad.

[0016] By adopting the above technical solution, the design of the rubber pad helps to provide good friction, ensuring that the clamp can firmly hold the graphite product, while reducing damage to the surface of the graphite product. The rubber pad can also absorb vibrations and maintain the stability and uniformity of the clamping.

[0017] In a specific feasible implementation, the fixing member includes a fixing rod and a locking member. The fixing rod is provided on the base, the fixing rod passes through the graphite product, one side of the locking member is inserted into the fixing rod and fixedly connected to the fixing rod, and the other side of the locking member abuts against the end face of the graphite product.

[0018] By adopting the above technical solution, the combination of the fixing rod and the locking member can effectively fix the graphite product on the base, prevent it from moving during the processing, and improve the processing accuracy. The design of the locking member allows for quick adjustment and fixation of the graphite product, making the loading and unloading process efficient and convenient. Moreover, the design of the locking member avoids damage to the graphite product and ensures that no damage is caused during the fixing and processing.

[0019] In a specific feasible implementation, the locking member includes a locking portion and a limiting portion. The locking portion is inserted into the fixing rod and threadedly connected to the fixing rod, and the limiting portion abuts against the end face of the graphite product.

[0020] By adopting the above technical solution, the locking member is fixed on the fixing rod through threaded connection, ensuring that the graphite product is firmly clamped, ensuring that the limiting portion can accurately contact the end face of the graphite product, thereby providing a consistent clamping force. The locking member connected by threaded connection can achieve quick loading, unloading and adjustment, improving the operation efficiency. The design of the limiting portion can avoid direct damage to the graphite product and ensure the safety of the graphite product during the clamping process.

[0021] In a specific feasible implementation, a rotating member is further included, and the rotating member is used to drive the base to rotate.

[0022] By adopting the above technical solution, with the design of the rotating member, for complex graphite products that require multi-angle processing, the rotating member can provide the necessary rotation ability, enhancing the flexibility of the system, enabling multi-angle processing of the graphite product.

[0023] In a specific feasible implementation, a cleaning component and a collection box are further included. The collection box is provided at the bottom of the bracket, and the cleaning component is used to clean the powder on the base and sweep the powder into the collection box.

[0024] By adopting the above technical solution, the cleaning component can effectively clean the powder on the base, keep the working area clean, reduce the interference of the powder to the equipment and operators, and avoid affecting the processing of graphite products, thereby improving the processing quality; the automated cleaning and collection system can reduce the need for manual cleaning and make the work process smoother and more efficient.

[0025] In a specific feasible embodiment, an installation frame is provided on the bracket, the cleaning component includes a cylinder, the cylinder is fixed on the installation frame, a telescopic rod of the cylinder is connected with a cleaning brush head, and the cleaning brush head contacts the base.

[0026] By adopting the above technical solution, the telescopic movement of the cylinder can precisely control the contact force and cleaning range of the brush head, ensure that the powder is effectively swept into the collection box, thereby improving the cleaning efficiency, and the adjustable nature of the cylinder allows for adaptation to different cleaning requirements.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: The present application mainly through the design and coordinated use of the lifting component, milling cutter and fixing piece, unifies the processing method of graphite products, ensures the consistency and precision of the grinding process, provides a more uniform grinding effect, reduces the appearance of surface unevenness and defects, improves production efficiency and product quality, while improving the operating environment and safety. This method significantly reduces the error rate, that is, it solves both the time efficiency problem and the stability problem; compared with traditional manual grinding, the automated milling cutter grinding device significantly improves the grinding efficiency and reduces the dependence on manual operation, thereby reducing labor costs and being able to reduce the direct contact between operators and dust, thus reducing health risks and enhancing work safety. Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of the graphite grinding device according to Embodiment 1 of the present application.

[0029] Figure 2 is a schematic structural diagram of the graphite grinding device according to Embodiment 3 of the present application.

[0030] Figure 3 is a cross-sectional view for showing the fixing rod and the locking piece.

[0031] Figure 4 is a schematic structural diagram of the graphite grinding device according to Embodiment 4 of the present application.

[0032] Figure 5 is a schematic structural diagram of the graphite grinding device according to Embodiment 5 of the present application.

[0033] Explanation of the reference numerals: 1. bracket; 11. base; 12. mounting frame; 2. milling cutter; 3. lifting assembly; 31. motor; 32. lifting rod; 4. fixing member; 41. clamp; 42. fixing rod; 43. locking member; 44. locking part; 45. limiting part; 5. graphite product; 6. speed adjustment button; 7. electric switch; 8. rotating member; 9. cleaning assembly; 91. cylinder; 92. telescopic rod; 93. cleaning brush head; 10. collecting box. DETAILED DESCRIPTION

[0034] The following is combined with Figures 1-5 This application is described in further detail.

[0035] Example 1

[0036] Reference Figure 1 The embodiment of the present application discloses a graphite grinding device, including a bracket 1, a milling cutter 2 and a lifting assembly 3. The bracket 1 is provided with a base 11, and the base 11 is used for placing a graphite product 5. In this embodiment, the graphite product 5 includes but is not limited to a graphite product 5 with a hollow central tube structure, and the graphite product 5 has a central hole. The graphite product 5 is fixed on the base 11 through a fixing member 4; the lifting assembly 3 is fixed on the bracket 1, and the lifting assembly 3 is connected to the milling cutter 2 and drives the milling cutter 2 to move in the vertical direction;

[0037] In this embodiment, the grinding depth of the milling cutter 2 includes but is not limited to 1mm. During the grinding process, the lifting assembly 3 drives the milling cutter 2 to grind from top to bottom in the vertical direction. After the grinding is completed, the milling cutter 2 is put into use again after cleaning and wiping. In this embodiment, the current industry standard for the wall thickness of the central tube of the graphite product 5 is 8mm. After the graphite product 5 is used, the grinding milling cutter 2 can be used repeatedly to grind the graphite product 5 by 1mm each time until the wall thickness reaches the scrapped state. The graphite product 5 is scrapped when the wall thickness of the central tube of the graphite product 5 is 3mm. After the grinding process, it can be repeatedly used to reduce the unit consumption of the graphite product 5. After unified processing, it can avoid the problem of frequent downtime and low efficiency caused by inadequate manual processing.

[0038] During the grinding operation, the graphite product 5 is placed on the base 11 of the device, and the graphite product 5 is fixed on the base 11 using the fixing member 4. The milling cutter 2 is driven to move on the surface of the graphite product 5 by the lifting assembly 3. The milling cutter 2 cuts and grinds the surface of the graphite product 5 to remove the unevenness and burrs on the surface. During this process, the lifting assembly 3 enables the milling cutter 2 to grind different areas of the graphite product 5 to ensure a smooth and consistent surface.

[0039] During this process, the coordinated use of the lifting assembly 3 and the milling cutter 2 ensures the consistency and accuracy of the grinding process, provides a more uniform grinding effect, reduces surface unevenness and defects, improves production efficiency and product quality, and improves the operating environment and safety.

[0040] The lifting assembly 3 includes a motor 31 provided on the bracket 1. The motor 31 is connected to a lifting rod 32. The motor 31 drives the lifting rod 32 to move up and down in the vertical direction. The side of the lifting rod 32 away from the motor 31 is connected to the milling cutter 2. In actual work, the lifting rod 32 system driven by the motor 31 can accurately adjust the height and position of the milling cutter 2, providing accurate and stable control for the graphite grinding device, thereby improving the grinding efficiency and product quality, while reducing labor costs and maintenance risks.

[0041] The fixing member 4 includes a clamp 41. The clamp 41 is provided on the bracket 1. The clamp 41 clamps the graphite product 5 to fix it on the base 11. In this embodiment, the design of the clamp 41 can adapt to graphite products 5 of different sizes and shapes. By adjusting the opening size of the clamp 41, various graphite products 5 of different specifications can be processed.

[0042] The graphite grinding device further includes an electric switch 7 and a speed adjustment button 6. Both the electric switch 7 and the speed adjustment button 6 are electrically connected to the motor 31. The electric switch 7 provides a simple start-stop operation, ensuring the quick start and stop of the motor 31 and improving work efficiency. The speed adjustment button 6 allows the operator to precisely control the speed of the milling cutter 2 according to specific requirements, thereby optimizing the grinding process and adapting to different types and sizes of graphite products 5. The electric switch 7 and the speed adjustment button 6 make the operation more convenient and intuitive, reducing the operation complexity and improving the user experience.

[0043] Before working, install the clamp 41 on the bracket 1 to ensure that the position of the clamp 41 can be docked with the graphite product 5 and the clamp 41 can hold the graphite product 5. Place the graphite product 5 on the base 11 to ensure its accurate position for easy clamping by the clamp 41. By adjusting the opening of the clamp 41, clamp the graphite product 5 and fix it on the base 11. When working, control the motor 31 to start through the electric switch 7 and control the speed of the milling cutter 2 through the speed adjustment button 6. The operation of the motor 31 will drive the connected lifting rod 32 to move vertically. The lifting rod 32 drives the milling cutter 2 to move up and down in the vertical direction. The milling cutter 2 cuts and grinds on the surface of the graphite product 5 to ensure a smooth and consistent surface. After grinding, control the motor 31 to stop through the electric switch 7 to complete the work.

[0044] The implementation principle of Embodiment 1 is as follows: This application mainly unifies the processing method of the graphite product 5 through the coordinated use of the lifting component 3, the milling cutter 2, and the fixing component 4, ensuring the consistency and precision of the grinding process, providing a more uniform grinding effect, reducing the appearance of surface unevenness and defects, improving production efficiency and product quality, and at the same time improving the operating environment and safety. This method significantly reduces the error rate, solving both the time efficiency problem and the stability problem;

[0045] Compared with the traditional manual grinding, the automated milling cutter 2 grinding device significantly improves the grinding efficiency and reduces the dependence on manual operation, thereby reducing labor costs and enabling less direct contact between the operator and dust, thus reducing health risks and enhancing work safety.

[0046] Embodiment 2

[0047] This embodiment has the same structure as Embodiment 1 and can be referred to Figure 1 The difference between this embodiment and Embodiment 1 is that a rubber pad is provided on the clamping surface of the clamp 41. In this embodiment, the rubber pad is arranged along the circumference of the clamp 41 and covers the entire clamping surface of the clamp 41. The clamp 41 contacts the graphite product 5 through the rubber pad to realize the clamping and fixing of the graphite product 5;

[0048] Through the design of the rubber pad, it helps to provide good friction, ensuring that the clamp 41 can firmly clamp the graphite product 5, while reducing damage to the surface of the graphite product 5. The rubber pad can also absorb vibrations, maintaining the stability and uniformity of the clamping.

[0049] Embodiment 3

[0050] Refer to Figure 2 and Figure 3 The difference between this embodiment and Embodiment 1 is that the fixing component 4 includes a fixing rod 42 and a locking component 43. The fixing rod 42 is arranged on the base 11. In this embodiment, the fixing rod 42 passes through the central hole of the graphite product 5, and the fixing rod 42 abuts against the central hole of the graphite product 5. One side of the locking component 43 is inserted into the fixing rod 42 and connected and fixed to the fixing rod 42, and the other side of the locking component 43 abuts against the end face of the graphite product 5;

[0051] The locking member 43 includes a locking portion 44 and a limiting portion 45. The locking portion 44 is a threaded portion. The locking portion 44 is inserted into the fixing rod 42 and is threadedly connected to the fixing rod 42. The limiting portion 45 abuts against the end face of the graphite product 5. The locking member 43 is fixed on the fixing rod 42 by threaded connection to ensure that the graphite product 5 is firmly clamped, ensuring that the limiting portion 45 can accurately contact the end face of the graphite product 5, thereby providing a consistent clamping force. The locking member 43 connected by threaded connection can achieve rapid loading and unloading and adjustment, improving the operation efficiency. The design of the limiting portion 45 can avoid direct damage to the graphite product 5 and ensure the safety of the graphite product 5 during the clamping process.

[0052] During operation, place the graphite product 5 on the base 11, pass the fixing rod 42 through the central hole of the graphite product 5, then insert the locking portion 44 of the locking member 43 into the fixing rod 42, and fix the locking member 43 to the fixing rod 42 by threaded connection. Rotate the locking member 43 to make the limiting portion 45 contact the end face of the graphite product 5, ensuring that the graphite product 5 is clamped and stably fixed, thereby stably fixing the graphite product 5 on the fixing seat.

[0053] In this embodiment, through the combination of the fixing rod 42 and the locking member 43, the graphite product 5 can be effectively fixed on the base 11 to prevent movement during the processing and improve the processing accuracy. The design of the locking member 43 allows for rapid adjustment and fixation of the graphite product 5, making the loading and unloading process efficient and convenient. Moreover, the design of the locking member 43 avoids damage to the graphite product 5, ensuring that no damage is caused during the fixation and processing.

[0054] Embodiment 4

[0055] Refer to Figure 4 , the difference between this embodiment and Embodiment 1 is that the graphite grinding device further includes a rotating member 8. The rotating member 8 is used to drive the base 11 to rotate. In this embodiment, the rotating member 8 includes, but is not limited to, an electric motor, a manual gear, or other rotary drive devices. The rotating member 8 transmits the rotational motion to the base 11 through mechanical connections such as gears, belts, or direct shaft connections, enabling the base 11 to perform the required rotational motion.

[0056] After the graphite product 5 is stably fixed, use the rotating member 8 to drive the base 11 to rotate. This can be used to achieve all-round processing operations or adjust the processing angle of the graphite product 5. Through the design of the rotating member 8, for complex graphite products 5 that require multi-angle processing, the rotating member 8 can provide the necessary rotational ability, enhancing the flexibility of the system and enabling multi-angle processing of the graphite product 5.

[0057] Embodiment 5

[0058] Refer to Figure 5, the difference between this embodiment and Embodiment 1 is that the graphite grinding device further includes a cleaning assembly 9 and a collection box 10. The collection box 10 is arranged at the bottom of the bracket 1, and the cleaning assembly 9 is used to clean the powder on the base 11 and sweep the powder into the collection box 10;

[0059] An installation frame 12 is provided on the bracket 1. The cleaning assembly 9 includes a cylinder 91. The cylinder 91 is fixed on the installation frame 12. A cleaning brush head 93 is connected to the telescopic rod 92 of the cylinder 91. The cleaning brush head 93 contacts the base 11. In this embodiment, the cylinder 91 drives the telescopic rod 92 and the cleaning brush head 93 to move back and forth in the horizontal direction to realize the cleaning work of the base 11; Through the telescopic movement of the cylinder 91, the contact force and cleaning range of the brush head can be accurately controlled to ensure that the powder is effectively swept into the collection box 10, thereby improving the cleaning efficiency, and the adjustability of the cylinder 91 allows it to adapt to different cleaning requirements;

[0060] After the grinding work is completed, the graphite product 5 is removed, the cylinder 91 is started, the telescopic rod 92 on the cylinder 91 driver extends, driving the cleaning brush head 93 to move back and forth in the horizontal direction, cleaning the powder on the base 11, and sweeping the powder on the base 11 into the entrance of the collection box 10 to ensure that the powder is effectively collected into the box;

[0061] Through the design of the cleaning assembly 9, the powder on the base 11 can be effectively cleaned, the working area can be kept clean, the interference of the powder to the equipment and the operator can be reduced, and the influence on the processing of the graphite product 5 can be avoided, thereby improving the processing quality; The automated cleaning and collection system can reduce the need for manual cleaning and make the work process smoother and more efficient.

[0062] The above are all preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A graphite grinding device, characterized in that: It includes a bracket (1), a milling cutter (2) and a lifting component (3). The lifting component (3) is arranged on the bracket (1) and connected to the milling cutter (2) to drive the milling cutter (2) to move. The bracket (1) is provided with a base (11), and the base (11) is used for placing a graphite product (5). It further includes a fixing piece (4), and the fixing piece (4) fixes the graphite product (5) on the base (11).

2. The graphite grinding device according to claim 1, wherein: The lifting component (3) includes a motor (31) arranged on the bracket (1). The motor (31) is connected with a lifting rod (32), and one side of the lifting rod (32) away from the motor (31) is connected to the milling cutter (2).

3. The graphite grinding device according to claim 2, wherein: It further includes an electric switch (7) and a speed adjustment button (6), and both the electric switch (7) and the speed adjustment button (6) are electrically connected to the motor (31).

4. The graphite polishing device according to claim 1, wherein: The fixing piece (4) includes a clamp (41). The clamp (41) is arranged on the bracket (1), and the clamp (41) clamps the graphite product (5) to fix it on the base (11).

5. The graphite grinding device according to claim 4, wherein: A rubber pad is arranged on the clamping surface of the clamp (41), and the clamp (41) contacts the graphite product (5) through the rubber pad.

6. The graphite polishing device according to claim 4, characterized in that: The fixing piece (4) includes a fixing rod (42) and a locking piece (43). The fixing rod (42) is arranged on the base (11), the fixing rod (42) passes through the graphite product (5), one side of the locking piece (43) is inserted into the fixing rod (42) and connected and fixed to the fixing rod (42), and the other side of the locking piece (43) abuts against the end face of the graphite product (5).

7. The graphite polishing device according to claim 6, wherein: The locking piece (43) includes a locking part (44) and a limiting part (45). The locking part (44) is inserted into the fixing rod (42) and is threadedly connected to the fixing rod (42), and the limiting part (45) abuts against the end face of the graphite product (5).

8. The graphite polishing device according to claim 1, characterized in that: It further includes a rotating piece (8), and the rotating piece (8) is used to drive the base (11) to rotate.

9. The graphite grinding device according to claim 1, wherein: It further includes a cleaning component (9) and a collection box (10). The collection box (10) is arranged at the bottom of the bracket (1), and the cleaning component (9) is used to clean the powder on the base (11) and sweep the powder into the collection box (10).

10. The graphite grinding device according to claim 9, wherein: An installation frame (12) is arranged on the bracket (1). The cleaning component (9) includes a cylinder (91). The cylinder (91) is fixed on the installation frame (12), and a cleaning brush head (93) is connected to the telescopic rod (92) of the cylinder (91), and the cleaning brush head (93) contacts the base (11).