Disc refacing machine

Abstract

The application discloses a disc repairing machine, which comprises a machine table, a grinding mechanism and a clamping mechanism. The grinding mechanism comprises a driving structure, a supporting and leveling structure and a grinding disc. The driving structure is connected to the machine table and drives the supporting and leveling structure. The supporting and leveling structure comprises a supporting disc and a floating leveling assembly. The supporting disc is drivingly connected to the driving structure. The floating leveling assembly is uniformly arranged on the supporting disc in a circumferential direction. The grinding disc is horizontally installed on the floating leveling assembly. The levelness of the grinding disc is adjusted by controlling the elastic floating amount of the floating leveling assembly at each angle in the circumferential direction. The clamping mechanism comprises a moving structure and a clamping structure. The moving structure is transversely arranged on the machine table. The clamping structure is drivingly connected to the moving structure. The clamping structure comprises an adjusting rod and a centering clamp. The centering clamp is arranged in a prefabricated hole at the center of a disc to be repaired. The adjusting rod is drivingly connected to the centering clamp so that the centering clamp clamps or releases the disc to be repaired. The technical scheme aims to improve the grinding precision of the grinding disc on the disc to be repaired.

Description

Technical Field

[0001] This invention relates to the field of disc repair machine technology, and particularly to a disc repair machine. Background Technology

[0002] A grinding wheel is a mechanical device used to grind the surface of a workpiece. It is commonly used in industries such as metal processing, wood processing, or glass manufacturing. The grinding wheel uses a rotating grinding disc or abrasive wheel to remove material from the surface of the workpiece, thereby achieving a smooth and precise processing effect.

[0003] In related technologies, when processing dressing parts, they are usually placed directly on the grinding disc, and the grinding disc is rotated to level them. This passive leveling method, where the dressing part is driven by the rotation of the grinding disc, results in poor dressing accuracy. Furthermore, due to the shape of the dressing part, the grinding disc is worn to varying degrees in different areas, which damages the flatness of the grinding disc. This reduces the grinding accuracy and roughness of the dressing part. Moreover, the grinding disc and the dressing part may not be completely aligned after they are put together, which may result in more grinding than the part that needs to be removed, thus reducing the grinding accuracy. Summary of the Invention

[0004] The main objective of this invention is to provide a grinding machine that improves the grinding accuracy of the grinding disc on the workpiece.

[0005] To achieve the above objectives, the present invention provides a disc repair machine comprising:

[0006] Machine tool;

[0007] A grinding mechanism, comprising a drive structure, a support and leveling structure, and a grinding disc, wherein the drive structure is connected to the machine base and drives the support and leveling structure, the support and leveling structure comprising a support tray and a floating leveling assembly, the support tray being driven and connected to the drive structure, the floating leveling assembly being evenly distributed circumferentially on the support tray, and the grinding disc being horizontally mounted on the floating leveling assembly, so as to adjust the levelness of the grinding disc by controlling the elastic floating amount of the floating leveling assembly at various circumferential angles; and

[0008] The clamping mechanism includes a moving structure and a clamping structure. The moving structure is laterally mounted across the machine base. The clamping structure is driven and connected to the moving structure. The clamping structure includes an adjusting rod and a centering fixture. The centering fixture is located in a pre-drilled hole at the center of the disc to be repaired. The adjusting rod is driven and connected to the centering fixture so that the centering fixture clamps or releases the disc to be repaired.

[0009] In one embodiment of this application, the floating leveling component includes:

[0010] Leveling blocks, which are circumferentially evenly distributed on the support tray, and each leveling block is provided with multiple receiving slots; and

[0011] At least three sets of elastic floating springs are evenly arranged and installed in the receiving groove, and abut against the end face of the grinding disc facing the support tray.

[0012] In one embodiment of this application, the centering fixture includes:

[0013] The upper mold base has an annular protrusion on one end face;

[0014] The lower mold base has an annular groove on its end face facing the upper mold base. Both the upper and lower mold bases have threaded holes at their centers. An adjusting rod is threaded into these threaded holes to allow the annular protrusion to engage or disengage from the annular groove. Both the upper and lower mold bases have beveled edges, which together form a clamping groove.

[0015] A clamping unit is included, which is wrapped around and embedded in the clamping groove. When the adjusting rod drives the annular protrusion of the upper mold base to be embedded in the annular groove of the lower mold base, the two oblique cut portions of the upper mold base and the lower mold base together squeeze the clamping unit, causing it to protrude from the edges of the upper mold base and the lower mold base, so as to clamp and fix the workpiece to be repaired.

[0016] In one embodiment of this application, the clamping unit includes a spring and a ball bearing structure. The spring is sleeved in the clamping groove, and the ball bearing structure passes through the spring and is evenly spaced along its circumference.

[0017] In one embodiment of this application, the adjusting rod is driven to a motor, and the motor is connected to the moving structure.

[0018] In one embodiment of this application, the adjusting rod includes telescopic joints that are sleeved together, and a buffer spring is provided at the connection between the two telescopic joints.

[0019] In one embodiment of this application, the moving structure includes:

[0020] Drive motor;

[0021] Two guide rods, the two guide rods being connected to the machine base;

[0022] A lead screw, which is driven by the drive motor and located between the two guide rods; and

[0023] The mounting base is threaded to the lead screw and passes through the two guide rods. The clamping structure is connected to the mounting base to drive the clamping structure to move relative to the grinding disc.

[0024] The technical solution of this invention adopts a support and leveling structure below the grinding disc. The levelness of the grinding disc is adjusted by adjusting the elastic floating amount of the support tray at various angles around the circumference. When the grinding disc is rotating and grinding, it can also avoid excessive grinding caused by direct rigid contact between the grinding disc and the workpiece to be repaired. Moreover, it can improve the fit between the grinding disc and the workpiece to be repaired and reduce the amount of grinding required to remove excess parts of the workpiece. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the repair machine of the present invention;

[0027] Figure 2 This is an exploded view of an embodiment of the repair machine of the present invention;

[0028] Figure 3 This is a schematic diagram of an embodiment of the clamping structure of the present invention.

[0029] Explanation of icon numbers:

[0030] 10. Machine base; 20. Grinding mechanism; 21. Supporting and leveling structure; 211. Support tray; 212. Floating leveling assembly; 2121. Leveling block; 2121a. Receiving groove; 2122. Elastic floating spring; 22. Grinding disc; 30. Clamping mechanism; 31. Moving structure; 311. Drive motor; 312. Guide rod; 313. Lead screw; 314. Mounting base; 32. Clamping structure; 321. Adjusting rod; 322. Centering fixture; 3221. Upper mold base; 3222. Lower mold base; 3223. Clamping groove; 3224. Clamping unit; 3224a. Spring; 3224b. Ball bearing structure.

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0036] To address the problems in the background art, in conjunction with reference to Figures 1 to 3As shown, the disc repair machine proposed in this invention includes a machine base 10, a grinding mechanism 20, and a clamping mechanism 30. The grinding mechanism 20 includes a drive structure (not shown), a support and leveling structure 21, and a grinding disc 22. The drive structure is connected to the machine base 10 and drives the support and leveling structure 21. The support and leveling structure 21 includes a support tray 211 and a floating leveling component 212. The support tray 211 is driven to the drive structure, and the floating leveling component 212 is evenly distributed circumferentially on the support tray 211. The grinding disc 22 is horizontally mounted on the floating leveling component 21. 2. The levelness of the grinding disc 22 is adjusted by controlling the elastic floating amount of the floating leveling component 212 at various circumferential angles; the clamping mechanism 30 includes a moving structure 31 and a clamping structure 32. The moving structure 31 is laterally spanned across the machine base 10. The clamping structure 32 is driven and connected to the moving structure 31. The clamping structure 32 includes an adjusting rod 321 and a centering clamp 322. The centering clamp 322 is disposed in a pre-drilled hole in the center of the disc to be repaired. The adjusting rod 321 is driven and connected to the centering clamp 322 so that the centering clamp 322 clamps or releases the disc to be repaired.

[0037] Understandably, the machine base 10 can be a vertically placed columnar or polygonal prism-shaped metal frame, and the drive structure can be a motor. A reducer is connected to the output shaft of the motor to reduce vibration and noise caused by radial sway during motor operation. A support and leveling structure 21 is driven and connected to the reducer, including a support tray 211 and floating leveling components 212. The support tray 211 can be a disc-shaped structure made of metal material, horizontally set on the machine base 10. Multiple floating leveling components 212 are evenly arranged circumferentially on the end face of the support tray 211. The floating leveling components 212 have a vertical extension and buffering function, which can adjust the level of the grinding disc 22 in real time. For example, it can be a telescopic sleeve or a ball bearing that can move up and down. The grinding disc 22 is a tool component for grinding and polishing operations, usually made of materials such as metal or ceramic. In this embodiment, the grinding disc 22 can be a polishing disc. The grinding disc 22 can be horizontally connected to the floating leveling component 212. Under the action of its own weight, the grinding disc 22 can be kept horizontal. The level of the grinding disc 22 can also be adjusted manually. The specific adjustment can be made flexibly according to the actual situation, and no limitation is made here.

[0038] A clamping mechanism 30 is provided above the grinding disc 22 for clamping and fixing the disc to be repaired. It includes a moving structure 31 and a clamping structure 32. The moving structure 31 can be horizontally mounted across the machine base 10. Specifically, a gantry support can be vertically mounted on the side of the machine base 10, and the moving structure 31 can be connected to the gantry support. The moving structure 31 can be a screw 313 nut structure, a ball screw structure, or other structure capable of lateral translation. The clamping structure 32 is connected to the moving structure 31 for clamping and fixing the disc to be repaired. The clamping structure 32 can include an adjusting rod 321 and a centering clamp 322. The centering clamp can be positioned within a pre-drilled hole in the center of the disc to be repaired. The pre-drilled hole is typically circular. The adjusting rod 321 can drive and control the centering clamp 322 to clamp or release the disc to be repaired.

[0039] It needs to be explained that after the centering fixture 322 clamps the workpiece to be repaired, the side of the workpiece facing the grinding disc 22 is usually kept horizontal. At this time, by adjusting the height of the adjusting rod 321, the surface of the workpiece to be processed can be made to abut against the grinding disc 22. The rotation of the grinding disc 22 can grind away any excess material on the workpiece. In related technologies, the workpiece to be repaired is usually placed directly on the grinding disc 22, and the workpiece is kept in contact with the surface of the grinding disc 22 by its own gravity. However, this method may result in the surface of the workpiece being ground being tilted, or the grinding amount may be too large, causing the thickness of the workpiece to not meet the standard. Therefore, the workpiece to be repaired can be clamped by the centering fixture 322 before grinding. At this time, the workpiece to be repaired is always kept in a horizontal state, and the leveling of the grinding disc 22 can be adjusted in real time due to the floating leveling component 212. For example, when the grinding disc 22 encounters a protruding part, the grinding disc 22 rotated to the position of the protruding part will also be slightly lowered under the action of the floating leveling component 212, so that the surface of the workpiece to be repaired that needs to be ground and the surface of the grinding disc 22 always keep in close contact. With this setting, the problem of insufficient thickness of the workpiece to be repaired due to excessive grinding amount will not occur, and the surface after grinding will be a horizontal surface, avoiding surface tilting caused by excessive local grinding amount.

[0040] Combined with reference Figure 2 As shown, in one embodiment of this application, the floating leveling component 212 includes a leveling block 2121 and at least three sets of elastic floating springs 2122. The leveling block 2121 is circumferentially and uniformly arranged on the support tray 211, and the leveling block 2121 is provided with a plurality of receiving grooves 2121a. The elastic floating springs 2122 are uniformly arranged and installed in the receiving grooves 2121a, and abut against the end face of the grinding disc 22 facing the support tray 211.

[0041] Understandably, the leveling block 2121 can be a long strip or wedge-shaped metal block, which is fixedly connected to the support tray 211 by screws, and multiple blocks are provided, which are evenly spaced around the end face of the support tray 211, with multiple support trays 211 located on the same virtual circumference. Multiple receiving slots 2121a are provided on the leveling block 2121. Elastic floating springs 2122 are inserted into the receiving slots 2121a. The center of the grinding disc 22 can be connected to the support tray 211, and its periphery can be supported by the elastic floating springs 2122. The elastic floating springs 2122 can be ordinary linear springs 3224a. Adjusting screws can also be set in the receiving slots 2121a to manually adjust the level of the grinding disc 22. The level of the grinding disc 22 can be adjusted by adjusting the elastic floating amount of the support tray 211 at various angles around the periphery. When the grinding disc 22 is rotating and grinding, it can also avoid excessive grinding caused by direct rigid contact between the grinding disc 22 and the workpiece to be repaired. Moreover, it can improve the fit between the grinding disc 22 and the workpiece to be repaired and reduce the amount of grinding required to remove excess parts of the workpiece.

[0042] Combined with reference Figure 3 As shown, in one embodiment of this application, the centering fixture 322 includes an upper mold base 3221, a lower mold base 3222, and a clamping unit 3224. One end face of the upper mold base 3221 is provided with an annular protrusion (not shown); the end face of the lower mold base 3222 facing the upper mold base 3221 is provided with an annular groove (not shown). Both the upper mold base 3221 and the lower mold base 3222 have threaded holes at their centers. The adjusting rod 321 is threadedly connected to the threaded holes of both, so that the annular protrusion can be engaged with or disengaged from the annular groove. The upper mold base 322... Both the upper mold base 3221 and the lower mold base 3222 have beveled edges, which together form a clamping groove 3223. The clamping unit 3224 surrounds and is embedded in the clamping groove 3223. When the adjusting rod 321 drives the annular protrusion of the upper mold base 3221 to be embedded in the annular groove of the lower mold base 3222, the two beveled edges of the upper mold base 3221 and the lower mold base 3222 together squeeze the clamping unit 3224, causing it to protrude from the edges of the upper mold base 3221 and the lower mold base 3222, so as to clamp and fix the workpiece to be repaired.

[0043] Understandably, the upper mold base 3221 and the lower mold base 3222 can be mutually movable and interlocking. The orthographic projection of the upper mold base 3221 can be circular, and an annular protrusion can be integrally formed on one end face of the upper mold base 3221. Correspondingly, the lower mold base 3222 has a similar shape to the upper mold base 3221, and an annular groove can be provided on the end face of the lower mold base 3222 facing the upper mold base 3221 to form a mutually movable and interlocking structure between the upper mold base 3221 and the lower mold base 3222. Furthermore, a threaded hole can be opened in the center of the upper mold base 3221 and the lower mold base 3222, and an adjusting screw is screwed into the threaded hole. By rotating the adjusting screw, the annular protrusion can be inserted into or disengaged from the annular groove. Specifically, an annular baffle (not shown) can be set at the position where the adjusting rod 321 connects to the upper mold base 3221. By rotating the adjusting rod 321 in conjunction with the annular baffle, the upper mold base 3221 can be pressed, so that the upper mold base 3221 can be embedded in the lower mold base 3222.

[0044] Furthermore, the edges of the upper mold base 3221 and the lower mold base 3222 can be provided with opposing beveled portions, which together form a clamping groove 3223. A clamping unit 3224 is enclosed within the clamping groove 3223. The clamping unit 3224 can be a steel ball or a polygonal prism-shaped metal part. By rotating the adjusting rod 321, the annular protrusion of the upper mold base 3221 is embedded in the annular groove of the lower mold base 3222, thereby gradually reducing the distance between the two side walls of the clamping groove 3223. This compresses the clamping unit 3224, causing it to protrude from the outer edge of the lower mold base 3222 of the upper mold base 3221, thus pressurizing the inner wall surface of the pre-drilled hole of the workpiece to be repaired, thereby clamping and fixing the workpiece to be repaired. Compared with ordinary grippers, this clamping method has a central clamping position, which is more conducive to processing; compared with suction cups, the clamping is more secure and can prevent the workpiece to be repaired from falling off during processing.

[0045] Combined with reference Figure 3 As shown, in one embodiment of this application, the clamping unit 3224 includes a spring 3224a and a ball structure 3224b. The spring 3224a is sleeved in the clamping groove 3223, and the ball structure 3224b passes through the spring 3224a and is evenly spaced along its circumference.

[0046] Understandably, the spring 3224a here can be a ring spring 3224a connected at both ends, wrapped around and set within the clamping groove 3223. The ball structure 3224b can be a spherical steel ball or a hexagonal nut, passing through the spring 3224a and evenly distributed along the circumference of the ring spring 3224a. By setting the spring 3224a, when the upper mold base 3221 disengages from the lower mold base 3222, the ball structure 3224b can automatically reset and be stored in the clamping groove 3223, thereby releasing the dressing piece that has completed the grinding process.

[0047] In one embodiment of this application, the adjusting rod 321 is driven to a motor, and the motor is connected to the moving structure 31.

[0048] Understandably, in order to achieve automatic clamping of the disc to be repaired, the adjusting rod 321 can be driven to be connected to a motor (not shown), and the clamping or release of the disc to be repaired can be achieved by controlling the forward and reverse rotation of the motor.

[0049] In one embodiment of this application, the adjusting rod 321 includes telescopic joints (not shown) that are sleeved together, and a buffer spring (not shown) is provided at the connection between the two telescopic joints.

[0050] Understandably, in order to avoid direct rigid contact between the workpiece to be repaired and the grinding disc 22, which could result in excessive grinding or damage to the workpiece, the adjusting rod 321 can be configured as two interlocking telescopic joints, with a buffer spring installed at the connection of the telescopic joints. This buffers the axial direction of the adjusting rod 321, which not only avoids rigid contact between the workpiece to be repaired and the grinding disc 22, but also reduces excessive grinding of the workpiece by the grinding disc 22.

[0051] In one embodiment of this application, the moving structure 31 includes a drive motor 311, two guide rods 312, a lead screw 313, and a mounting base 314. The two guide rods 312 are connected to the machine base 10. The lead screw 313 is drivenly connected to the drive motor 311 and is located between the two guide rods 312. The mounting base 314 is threadedly connected to the lead screw 313 and passes through the two guide rods 312. The clamping structure 32 is connected to the mounting base 314 to drive the clamping structure 32 to move relative to the grinding disc 22.

[0052] Understandably, the center distance of the workpiece to be repaired from the center of the grinding disc 22 varies for workpieces of different diameters. Therefore, it is necessary to adjust the center position of the workpiece to be repaired to place it in the optimal grinding position relative to the grinding disc 22. In view of this, a moving structure 31 can be provided on the machine base 10 to adjust the position of the workpiece to be repaired. The moving structure 31 may include a drive motor 311, two guide rods 312, a lead screw 313, and a mounting base 314. The two guide rods 312 can be connected to the machine base 10 and are horizontally arranged. A lead screw 313 is provided between the two guide rods 312. One end of the lead screw 313 is driven and connected to the drive motor 311. The mounting base 314 is screwed to the lead screw 313 and passes through the guide rods 312 to limit and guide the mounting base 314. A clamping structure 32 is connected to the mounting base 314. The rotation of the drive motor 311 can drive the mounting base 314 to move, thereby driving the clamping structure 32 to move, and thus adjusting the relative position of the workpiece to be repaired and the grinding disc 22.

[0053] It should be noted that the relative position of the workpiece to be repaired and the grinding disc 22 can also be adjusted manually. For example, a mounting bracket can be horizontally set on the machine base 10, and multiple adjustment holes can be provided on the mounting bracket. The relative position of the workpiece to be repaired and the grinding disc 22 can be adjusted by installing the clamping structure 32 in different mounting holes. However, this method has a limited adjustment range and cannot be adjusted within an arbitrary range.

[0054] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A disc repair machine, characterized by comprising: The grinding machine comprises a machine table, a grinding mechanism, and a clamping mechanism. The grinding mechanism comprises a driving structure, a supporting and leveling structure, and a grinding disc. The supporting and leveling structure comprises a supporting disc and a floating leveling assembly. The floating leveling assembly is evenly arranged on the supporting disc. The grinding disc is horizontally installed on the floating leveling assembly. The clamping mechanism comprises a moving structure and a clamping structure. The moving structure is transversely arranged on the machine table. The clamping structure is drivingly connected to the moving structure. The clamping structure comprises an adjusting rod and a centering clamp. The centering clamp is arranged in a pre-prepared hole in the center of a disc to be repaired. The adjusting rod drivingly connects the centering clamp to clamp or release the disc to be repaired. The floating leveling assembly comprises leveling blocks and elastic floating springs.

2. The disc repair machine of claim 1, wherein The leveling blocks are evenly arranged on the supporting disc.

3. The disc repair machine of claim 1, wherein The leveling blocks are provided with a plurality of accommodating grooves.

4. The disc repair machine of claim 3 wherein, The elastic floating springs are evenly arranged in the accommodating grooves and abut against the end face of the grinding disc facing the supporting disc.

5. The disc repair machine of claim 1, wherein The centering clamp comprises an upper die holder, a lower die holder, and a clamping unit. One side end face of the upper die holder is provided with an annular protrusion. The end face of the lower die holder facing the upper die holder is provided with an annular groove. The center of the upper die holder and the center of the lower die holder are both provided with threaded holes. The adjusting rod is threadedly connected to the threaded holes of the upper die holder and the lower die holder. The annular protrusion of the upper die holder is embedded in or separated from the annular groove of the lower die holder. The edges of the upper die holder and the lower die holder are both provided with beveled portions. The beveled portions of the upper die holder and the lower die holder together form a clamping groove. The clamping unit is wrapped around and embedded in the clamping groove. When the annular protrusion of the upper die holder is embedded in the annular groove of the lower die holder, the beveled portions of the upper die holder and the lower die holder together extrude the clamping unit to protrude from the edges of the upper die holder and the lower die holder to clamp and fix the disc to be repaired. The clamping unit comprises a spring and a ball structure. The spring is sleeved in the clamping groove. The ball structure is arranged in the spring and is evenly and spacedly distributed along the circumference of the spring. The adjusting rod is drivingly connected to a motor. The motor is connected to the moving structure. The adjusting rod comprises telescopic sections. Buffer springs are arranged at the connection between the telescopic sections. The moving structure comprises a driving motor, two guide rods, a lead screw, and a mounting seat. The two guide rods are connected to the machine table. The lead screw is drivingly connected to the driving motor and is located between the two guide rods. The mounting seat is threadedly connected to the lead screw and is arranged in the two guide rods. The clamping structure is connected to the mounting seat to drive the clamping structure to move relative to the grinding disc.

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