Polishing tool and polishing equipment for cylindrical surface of optical part

Abstract

The utility model relates to the field of optical part polishing, and provides a cylindrical surface polishing tool and polishing equipment for optical parts, and the cylindrical surface polishing tool comprises a polishing connecting assembly which is used for being connected with a polishing machine body and is driven by the polishing machine body to rotate; the polishing connecting assembly comprises a clamping piece and an adapter sleeve, a containing hole is formed in the clamping piece, the containing hole is used for containing the optical part, the adapter sleeve is arranged on the clamping piece in a sleeving mode, and the containing hole shrinks and clamps the optical part through movement of the adapter sleeve; the supporting frame is arranged on the polishing machine body; and the polishing die is connected with the supporting frame and used for polishing the cylindrical surface of the optical part. The problem that in the prior art, the cylindrical surface polishing quality is poor due to the handheld polishing mode is solved.

Description

Technical Field

[0001] The present application relates to the technical field of optical component polishing, and more specifically, to a cylindrical polishing tool and polishing equipment for optical components. Background Art

[0002] When polishing the cylindrical surface of an optical component in the prior art, usually a polishing mold is fixed to the polishing equipment, and the polishing mold is driven to rotate by the polishing equipment. The staff directly holds the tail end of the optical component by hand, makes the head end of the optical component face the polishing mold, and makes the cylindrical surface of the optical component abut against the grinding surface of the polishing mold. During the rotation of the polishing mold, the staff's hand continuously rotates the direction of the optical component, so that the entire cylindrical side wall of the optical component can be polished by the polishing mold.

[0003] Since the force applied by the staff's hand to the optical component is different, it is extremely easy to cause uneven cylindrical surface polishing, poor flatness of the cylindrical surface, and easy appearance of surface defects, resulting in poor quality of the cylindrical surface polishing of the optical component.

[0004] Therefore, the prior art still needs to be improved and developed. Utility Model Content

[0005] The purpose of the present application is to provide a cylindrical polishing tool and polishing equipment for optical components, which solves the problem of poor quality of cylindrical surface polishing caused by the hand-held polishing method in the prior art.

[0006] To achieve the above purpose, the technical solution adopted in the present application is:

[0007] On the one hand, the present application provides a cylindrical polishing tool for optical components, including:

[0008] A polishing connection assembly, which is used to connect the polishing machine body and rotates by the drive of the polishing machine body;

[0009] The polishing connection assembly includes a clamping member and a transfer sleeve. An accommodation hole is provided on the clamping member for accommodating the optical component. The transfer sleeve is sleeved on the clamping member, and the accommodation hole shrinks and clamps the optical component by the movement of the transfer sleeve;

[0010] A support frame, which is arranged on the polishing machine body;

[0011] A polishing mold, which is connected to the support frame and is used to polish the cylindrical surface of the optical component.

[0012] In an optional embodiment, the support frame includes: a column, which is vertically arranged on the polishing machine body;

[0013] The crossbar, one end of the crossbar is adjustably arranged on the vertical column in the up and down direction, and the other end horizontally extends a predetermined length and is connected to the polishing mold.

[0014] In an alternative embodiment, the receiving hole has an orifice, and the optical part is inserted into the receiving hole through the orifice;

[0015] The receiving hole has a clamping section and a clearance section. The clamping section is arranged close to the orifice, the clearance section is located on the side of the clamping section away from the orifice, and the inner diameter of the clamping section is smaller than the inner diameter of the clearance section.

[0016] In an alternative embodiment, the clamping member includes: an upper jacket and a lower jacket connected to the upper jacket;

[0017] The upper jacket and the lower jacket are connected to form the receiving hole, the orifice is opened on the upper jacket, and a clamping platform is provided on the inner wall at the orifice, and the clamping platform encloses the clamping section.

[0018] In an alternative embodiment, a deformation groove is axially provided on the outer wall of the clamping member, and the deformation groove communicates with the receiving hole and extends to the top of the clamping member.

[0019] In an alternative embodiment, the adapter sleeve has an extrusion hole, and the extrusion hole is conical;

[0020] The clamping member is sleeved in the extrusion hole, and the extrusion hole compresses the clamping member through the axial movement of the adapter sleeve.

[0021] In an alternative embodiment, the polishing connection assembly further includes: a seat body, and the clamping member is connected to the seat body;

[0022] External threads are provided on the outer wall of the seat body, internal threads are provided in the adapter sleeve, and the adapter sleeve moves axially through rotation by the cooperation of the internal threads and the external threads.

[0023] In an alternative embodiment, a screwing post is provided on the seat body, and one end of the clamping member away from the polishing mold is screwed onto the screwing post.

[0024] In an alternative embodiment, a plug-in platform is provided at one end of the seat body away from the clamping member, and the plug-in platform is used for inserting into the rotating shaft of the polishing machine body;

[0025] The plug-in platform is a conical platform.

[0026] On the other hand, the present application also proposes a polishing device, including: a polishing machine body and the above-mentioned cylindrical polishing tool for optical parts;

[0027] The polishing tool is arranged on the polishing machine body.

[0028] The beneficial effects of a cylindrical polishing tool for optical parts and a polishing device provided by the present application are at least as follows: By providing accommodation holes in the clamping member, inserting the optical parts into the accommodation holes, and moving the adapter sleeve to squeeze the clamping member, the accommodation holes contract to tightly hold the optical parts, thus stably fixing the optical parts on the polishing connection assembly. The polishing mold is connected to the polishing machine body through a support frame and is located above the optical parts. The polishing mold is sleeved on the optical parts, and the working surface of the polishing mold stably abuts against the cylindrical surface of the optical parts. The rotating polishing connection assembly drives the optical parts thereon to rotate, so that the cylindrical surface of the optical parts rotates within the polishing mold to achieve uniform polishing. This not only eliminates the need for manual holding, thereby reducing labor costs, but also uniformly polishes the cylindrical surface of the optical parts through a polishing mold with a fixed position, resulting in better flatness of the cylindrical surface and fewer defects on the surface of the cylindrical surface, improving the polishing quality of the cylindrical surface of the optical parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 Structural schematic diagram of the cylindrical polishing tool for optical parts in the embodiment of the present application connected to the polishing machine body;

[0031] Figure 2 Exploded view of the support frame and the polishing mold of the cylindrical polishing tool for optical parts in the embodiment of the present application;

[0032] Figure 3 Cross-sectional view of the cylindrical polishing tool for optical parts provided by the embodiment of the present application;

[0033] Figure 4 is Figure 3 enlarged view of part A;

[0034] Figure 5 Exploded view of the polishing connection assembly of the cylindrical polishing tool for optical parts provided by the embodiment of the present application.

[0035] Among them, the reference numerals in the drawings are as follows:

[0036] 10. Polishing machine body; 11. Rotating shaft; 12. Insertion hole; 20. Optical part; 100. Polishing connection assembly; 110. Clamping part; 111. Accommodating hole; 112. Clamping section; 113. Clearance section; 114. Upper clamping sleeve; 115. Clamping table; 116. Lower clamping sleeve; 117. Deformation groove; 120. Adapter sleeve; 121. Extrusion hole; 130. Base body; 131. External thread; 132. Screwing post; 133. Insertion table; 200. Support frame; 210. Column; 220. Cross bar; 300. Polishing die; 310. Fixed block; 320. Movable block; 330. Polishing hole. Detailed implementation manners

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer and more understandable, the following further details this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0038] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The orientations or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positions shown in the accompanying drawings, and are only for the convenience of description and cannot be construed as a limitation to the technical solution of this application. The terms "first" and "second" are only used for the purpose of convenient description and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0039] In the existing cylindrical surface polishing of optical parts, manual hand-held polishing not only has different hand strengths and is not easy to control, resulting in uneven cylindrical surface polishing, poor flatness of the cylindrical surface, and easy appearance of surface defects, but also the manual hand-held processing efficiency is low, the product quality is difficult to monitor, and the product consistency is also poor. To solve the above problems, the following embodiments are proposed in this application, specifically as follows:

[0040] Embodiment 1

[0041] As Figure 1 、 Figure 3As shown in the figure, this embodiment proposes a cylindrical polishing tool for optical parts, which is used to be set on the polishing machine body 10. The polishing machine body 10 provides rotational power to polish the cylindrical surface of the optical part 20. For the convenience of structural description, in this embodiment, the optical part 20 is taken as an example of a cylindrical optical part 20 for structural explanation. This cylindrical polishing tool for optical parts mainly includes: a polishing connection assembly 100, a support frame 200, and a polishing mold 300. The polishing connection assembly 100 is a vertical structure and can be vertically connected to the polishing machine body and rotated by the drive of the polishing machine body. The polishing connection assembly 100 specifically includes: a clamping member 110 and a transfer sleeve 120. The clamping member 110 is provided with a receiving hole 111. The receiving hole 111 is arranged along the axial direction (up and down direction) of the clamping member 110, and the opening of the receiving hole 111 faces upward. The receiving hole 111 is used to receive the optical part 20, and the optical part 20 can be inserted into the receiving hole 111 from top to bottom through the opening. The transfer sleeve 120 is sleeved on the clamping member 110. By moving the transfer sleeve 120, the receiving hole 111 is contracted to clamp the optical part 20. When the transfer sleeve 120 moves to different positions of the clamping member 110, it can squeeze or loosen the clamping member 110. The clamping member 110 deforms under extrusion, so that the receiving hole 111 shrinks and becomes smaller. Therefore, the optical part 20 is clamped by the contracted receiving hole 111 (specifically, the clamping table 115), realizing stable fixation of the optical part 20. The end of the optical part 20 to be polished faces upward and exposes the receiving hole 111. The support frame 200 is arranged on the polishing machine body. The polishing mold 300 is connected to the support frame 200. The support frame 200 stably supports the polishing mold 300, so that the polishing mold 300 is located above the polishing connection assembly 100 and is used to polish the cylindrical surface of the optical part 20.

[0042] A cylindrical polishing tool for optical parts provided in this embodiment inserts the optical part 20 into the accommodation hole 111 by opening an accommodation hole 111 in the clamping member 110, and moves the adapter sleeve 120 to make the adapter sleeve 120 press the clamping member 110, so that the accommodation hole 111 shrinks and presses the optical part 20 tightly. Therefore, the optical part 20 is stably fixed on the polishing connection assembly 100. The polishing die 300 is connected to the polishing machine body through the support frame 200 and is located at the upper end of the optical part 20. The polishing die 300 is sleeved on the optical part 20, and the working surface of the polishing die 300 stably abuts against the cylindrical surface of the optical part 20. The rotating polishing connection assembly 100 drives the optical part 20 thereon to rotate, so that the cylindrical surface of the optical part 20 rotates in the polishing die 300 to achieve uniform polishing. It not only does not require manual holding, thus reducing labor costs, but also uniformly polishes the cylindrical surface of the optical part 20 through the polishing die 300 with a fixed position. The flatness of the cylindrical surface is better, and defects are not likely to appear on the surface of the cylindrical surface, improving the polishing quality of the cylindrical surface of the optical part 20 and improving the polishing efficiency.

[0043] As Figure 1 , Figure 2 shown, further, the support frame 200 in this embodiment specifically includes: a vertical column 210 and a cross bar 220. The vertical column 210 is vertically arranged on the housing of the polishing machine body in the up and down direction and is arranged at a certain distance from the rotating shaft 11 of the polishing machine body. One end of the cross bar 220 is adjustably arranged on the vertical column 210 in the up and down direction, and the other end horizontally extends a predetermined length and is connected to the polishing die 300. After the optical part 20 is fixed on the polishing connection assembly 100, the position of the cross bar 220 in the up and down direction is adjusted, so as to drive the polishing die 300 to be adjusted in the up and down position, so that the cylindrical surfaces of different parts of the optical part 20 in the axial direction can be polished, improving the practicability.

[0044] As Figure 1 , Figure 2 shown, the polishing die 300 in this embodiment can be matched and set according to the size of the cylindrical surface of the optical part 20. In a specific structure, the polishing die 300 may include: a fixed block 310 and a movable block 320. The fixed block 310 is fixedly connected to the cross bar 220 (for example, can be integrally formed with the cross bar 220), the movable block 320 is detachably connected to the fixed block 310 by screws, and a polishing hole 330 is formed between the movable block 320 and the fixed block 310. The inner wall of the polishing hole 330 is the polishing working surface. During polishing, the cylindrical surface of the optical part 20 is inserted into the polishing hole 330 and abuts against part or all of the inner wall of the polishing hole 330. Through the rotation of the optical part 20, the inner wall of the polishing hole 330 continuously polishes the cylindrical surface of the optical part 20.

[0045] As Figure 1, Figure 3 , Figure 4 As shown in Figure 3 and Figure 4 , further, the receiving hole 111 in this embodiment has an orifice, and the optical component 20 is inserted into the receiving hole 111 through the orifice. The receiving hole 111 has a clamping section 112 and a clearance section 113. The clamping section 112 is arranged close to the orifice, and the clearance section 113 is located on the side of the clamping section 112 away from the orifice. The inner diameter of the clamping section 112 is smaller than that of the clearance section 113. When the optical component 20 is fixed by the clamping member 110, the lower end of the optical component 20 extends into the receiving hole 111. Since the inner diameter of the clamping section 112 is smaller than that of the clearance section 113, when the receiving hole 111 contracts for clamping, only the small-diameter clamping section 112 clamps the optical component 20, and the large-diameter clearance section 113 at the lower end does not exert a force on the columnar component. In this way, for a relatively long columnar optical component 20, only the area closer to the polished cylindrical surface is clamped, while the lower end of the optical component 20 is avoided, making the clamping more stable. During the processing, the central axis of the columnar optical component 20 can be coaxial with the rotation center, which is beneficial to ensuring the accuracy after polishing.

[0046] As Figure 3 , Figure 4 , Figure 5 As shown in ,

[0046] , and Figure 3 , further, the clamping member 110 in this embodiment specifically includes: an upper clamping sleeve 114 and a lower clamping sleeve 116 connected to the upper clamping sleeve 114. The upper clamping sleeve 114 and the lower clamping sleeve 116 are connected to form the receiving hole 111. The orifice is opened on the upper clamping sleeve 114, and a clamping platform 115 is provided on the inner wall at the orifice. The clamping platform 115 encloses the clamping section 112. In a specific structure, a plurality of counterbores are provided around the orifice at the top of the upper clamping sleeve 114, and threaded holes are provided at corresponding positions at the top of the lower clamping sleeve 116. The upper clamping sleeve 114 and the lower clamping sleeve 116 are stably connected by passing screws through the counterbores and connecting to the threaded holes. By adopting the form of the upper clamping sleeve 114 and the lower clamping sleeve 116, it is convenient to form the clamping platform 115 at the orifice. During processing, the upper clamping sleeve 114 and the lower clamping sleeve 116 can be separately processed. In this way, for the clamping platform 115 with a relatively small diameter at the orifice position, the processing process is simpler and the structure is more optimized.

[0047] As Figure 3 , Figure 5 As shown in Figure 3 and Figure 5 , further, a deformation groove 117 is axially provided on the outer wall of the clamping member 110 in this embodiment. The deformation groove 117 communicates with the receiving hole 111 and extends to the top of the clamping member 110. In a specific structure, there are multiple deformation grooves, such as 4. The 4 deformation grooves are evenly distributed around the central axis of the clamping member 110. By providing the deformation grooves on the clamping member 110, the clamping member 110 is more easily deformed when the outer wall is pressed, so that the receiving hole 111 is more conveniently deformed and shrunk to tightly clamp the optical component 20.

[0048] As Figure 1 , Figure 3 , Figure 5 shown, further, an extrusion hole 121 is provided at the axial center of the adapter sleeve 120. The extrusion hole 121 is conical. The clamping member 110 is sleeved in the extrusion hole 121, and the extrusion hole 121 compresses the clamping member 110 by the axial movement of the adapter sleeve 120. When the adapter sleeve 120 moves outside the clamping member 110, the distance from the hole wall at this position of the conical hole to the central axis of the clamping member 110 becomes smaller and smaller in a cross-section, so that the outer wall of the clamping member 110 can be gradually extruded, and the accommodation hole 111 is reduced by the deformation of the clamping member 110 to clamp the optical part 20.

[0049] In this embodiment, the extrusion hole 121 of the adapter sleeve 120 is in the form of a large upper diameter and a small lower diameter. In this way, when the adapter sleeve 120 moves in the direction from bottom to top, the clamping member 110 is extruded to clamp the optical part 20. In addition, the extrusion hole 121 can also be in the form of a large lower diameter and a small upper diameter. In this way, when the adapter sleeve 120 moves in the direction from top to bottom, the clamping member 110 is extruded to clamp the optical part 20.

[0050] As Figure 1 , Figure 3 , Figure 5 shown, further, the polishing connection assembly 100 in this embodiment specifically further includes: a seat body 130. The clamping member 110 is connected to the seat body 130. The seat body 130 is used to be connected to the rotating shaft 11 of the polishing machine body 10, and the clamping member 110 is stably supported through the seat body 130. An external thread 131 is provided on the outer wall of the seat body 130, and an internal thread is provided in the adapter sleeve 120. The adapter sleeve 120 moves axially by rotation through the cooperation of the internal thread and the external thread 131. By screwing the adapter sleeve 120, the adapter sleeve 120 moves in the direction from bottom to top to compress the clamping member 110, so that the optical part 20 is clamped. By screwing the adapter sleeve 120 in the reverse direction, the adapter sleeve 120 moves in the direction from top to bottom to loosen the clamping member 110. In this way, the adapter sleeve 120 can be located at the lower position of the clamping member 110, so as not to interfere with the insertion and extraction of the optical part 20 at the top, facilitating the installation and disassembly of the optical part 20.

[0051] As Figure 3 , Figure 5 shown, further, a screwing post 132 is provided on the seat body 130 in this embodiment. One end of the clamping member 110 facing away from the polishing die 300 is screwed onto the screwing post 132. The screwing post 132 is located on the upper end surface of the seat body 130, and the clamping member 110 is directly screwed onto the screwing post 132, facilitating the assembly of the clamping member 110.

[0052] As Figure 1 , Figure 3 , Figure 5 shown, further, one end of the seat body 130 in this embodiment, which faces away from the clamping member 110, is provided with a plug-in table 133, and the plug-in table 133 is used to be inserted onto the rotating shaft 11 of the polishing machine body 10. A plug-in hole 12 or a slot is correspondingly formed on the rotating shaft 11. In the form where the plug-in table 133 matches the plug-in hole 12, it is convenient to quickly install and remove the polishing connection assembly 100 and the optical part 20 as a whole from the rotating shaft 11 of the polishing machine body 10. If multiple polishing connection assemblies 100 are used alternately, when one polishing connection assembly 100 is performing polishing on the polishing machine body 10, the optical part 20 of the other removed polishing connection assembly 100 can be disassembled, which can improve the processing efficiency.

[0053] As Figure 3 , Figure 5 shown, the plug-in table 133 in this embodiment is a tapered table. The plug-in table 133 being a tapered table has the function of automatically centering the axis, can achieve quick loading and unloading, and can also well ensure the polishing size.

[0054] The polishing process is as follows: After assembling the polishing connection assembly 100, install the polishing connection assembly 100 on the rotating shaft 11 of the polishing machine body 10. First, turn the adapter sleeve 120 downward to open the receiving hole 111. After inserting the optical part 20 into the receiving hole 111, turn the adapter sleeve 120 upward in the reverse direction to make the receiving hole 111 contract and clamp the optical part 20. The upper polishing mold 300 is sleeved around the cylindrical surface of the optical part 20. After the polishing machine body rotates, the rotating shaft 11 of the polishing machine body drives the polishing connection assembly 100 and the optical part 20 therein to rotate, so that the optical part 20 and the polishing mold 300 rotate relative to each other to achieve polishing.

[0055] Embodiment 2

[0056] As Figure 1 shown, this embodiment provides a polishing device, including: a polishing machine body 10 and the polishing tool for the cylindrical surface of the optical part as described above. The polishing connection assembly 100 in the polishing tool is rotatably arranged on the polishing machine body 10, and the polishing mold 300 in the polishing tool is fixedly arranged on the polishing machine body 10 through the support frame 200.

[0057] In summary, a polishing tool for the cylindrical surface of an optical part and a polishing device proposed in this application enable both the polishing mold and the processed part to be connected to the polishing machine body, eliminating the need for manual holding during polishing, thereby reducing the manual holding time and ensuring the surface quality after polishing. Additionally, the polishing position can be adjusted, the cylindrical surfaces of optical parts with different lengths can be polished, and the polishing efficiency is also improved.

[0058] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A cylindrical polishing tool for optical parts, characterized in that: include: A polishing connection assembly, the polishing connection assembly is used to connect to a polishing machine body and is rotated by the drive of the polishing machine body; The polishing connection assembly includes a clamping member and an adapter sleeve. The clamping member is provided with a receiving hole for receiving an optical component. The adapter sleeve is sleeved on the clamping member. The receiving hole is contracted and the optical component is clamped by the movement of the adapter sleeve. A support frame, wherein the support frame is arranged on the polishing machine body; A polishing mold is connected to the support frame and is used for polishing the cylindrical surface of the optical part.

2. The cylindrical polishing tool for optical parts according to claim 1, characterized in that: The support frame comprises: a column, and the column is uprightly arranged on the polishing machine body; A cross bar, one end of which is adjustably arranged on the column in the up-down direction, and the other end of which is horizontally extended to a predetermined length and connected to the polishing mold.

3. The cylindrical polishing tool for optical parts according to claim 1, characterized in that: The receiving hole has an opening, and the optical component is inserted into the receiving hole through the opening; The accommodating hole has a clamping section and a clearance section, the clamping section is arranged close to the orifice, the clearance section is located on a side of the clamping section away from the orifice, and the inner diameter of the clamping section is smaller than the inner diameter of the clearance section.

4. The cylindrical polishing tool for optical parts according to claim 3, characterized in that: The clamping member comprises: an upper jacket and a lower jacket connected to the upper jacket; The upper jacket and the lower jacket are connected to form the accommodating hole, the orifice is provided on the upper jacket, a clamping platform is provided on the inner wall of the orifice, and the clamping platform surrounds the clamping section.

5. The cylindrical polishing tool for optical parts according to claim 1, characterized in that: A deformation groove is axially provided on the outer wall of the clamping member, and the deformation groove is connected to the accommodating hole and extends to the top end of the clamping member.

6. The cylindrical polishing tool for optical parts according to claim 5, characterized in that: The adapter sleeve has an extrusion hole, and the extrusion hole is tapered; The clamping piece is sleeved in the extrusion hole, and the extrusion hole compresses the clamping piece through the axial movement of the adapter sleeve.

7. The cylindrical polishing tool for optical parts according to claim 1, characterized in that: The polishing connection assembly further comprises: a seat body, the clamping member being connected to the seat body; An external thread is provided on the outer wall of the seat body, and an internal thread is provided in the adapter sleeve. The adapter sleeve is moved axially by rotating due to the cooperation between the internal thread and the external thread.

8. The cylindrical polishing tool for optical parts according to claim 7, characterized in that: The seat body is provided with a screw connection column, and one end of the clamping member facing away from the polishing mold is screwed on the screw connection column.

9. The cylindrical polishing tool for optical parts according to claim 7, characterized in that: An inserting platform is provided at one end of the seat body away from the clamping member, and the inserting platform is used to be inserted into the rotating shaft of the polishing machine body; The plug-in platform is a conical platform.

10. A polishing device, characterized in that: include: A polishing machine body and a cylindrical polishing tool for optical parts as claimed in any one of claims 1 to 9; The cylindrical polishing tool for optical parts is arranged on the polishing machine body.

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