CN117733718A - Valve polishing equipment - Google Patents
Valve polishing equipment Download PDFInfo
- Publication number
- CN117733718A CN117733718A CN202410184199.1A CN202410184199A CN117733718A CN 117733718 A CN117733718 A CN 117733718A CN 202410184199 A CN202410184199 A CN 202410184199A CN 117733718 A CN117733718 A CN 117733718A
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- Prior art keywords
- block
- magnetic
- driving
- shaft
- rotating
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- Pending
Links
- 238000005498 polishing Methods 0.000 title claims abstract description 78
- 210000001503 joint Anatomy 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000005096 rolling process Methods 0.000 claims description 8
- 230000005389 magnetism Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004018 waxing Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Abstract
The invention provides valve polishing equipment, which relates to the field of valve processing and comprises a polishing device and a magnetic driving device; the polishing device comprises a first driving component, a polishing wheel, a cover body and a first magnetic component, wherein one end of the first magnetic component is arranged in the cover body, and the other end of the first magnetic component penetrates through the polishing wheel and is in threaded connection with the first driving component; the magnetic force driving device comprises a second driving component and a second magnetic component connected with the output end of the second driving component, and when the second magnetic component is in butt joint with the cover body, the second driving component is used for driving the first magnetic component to rotate and driving the second magnetic component to rotate. The polishing wheel replacement device solves the problem that the polishing wheel replacement efficiency of a traditional polishing machine is low.
Description
Technical Field
The invention relates to the field of valve machining, in particular to valve polishing equipment.
Background
Polishers, also known as grinders, are often used for mechanical grinding, polishing and waxing. The working principle is as follows: the motor drives the sponge or wool polishing disc arranged on the polishing machine to rotate at a high speed, and the polishing disc and the polishing agent jointly act and rub the surface to be polished, so that the purposes of removing paint surface pollution, oxide layers and shallow marks can be achieved.
In the manufacturing process of the valve, polishing is an important processing procedure in a processing link, the polishing of the inner surface of the valve has an influence on the flowing speed of fluid, and the polishing of the outer surface of the valve has an influence on the purchasing desire of customers.
On traditional burnishing machine, the polishing wheel is a quick consumable, and traditional burnishing machine change polishing wheel is comparatively loaded down with trivial details, needs the workman to loosen locking screw with the spanner, changes the polishing wheel then, locks locking screw again, and this step is comparatively loaded down with trivial details and inconvenient.
Disclosure of Invention
Based on the problem, in order to solve the problem of low polishing wheel replacement efficiency of the traditional polishing machine, the invention provides valve polishing equipment, which comprises the following specific technical scheme:
a valve polishing apparatus, comprising
The polishing device comprises a first driving component, a polishing wheel, a cover body and a first magnetic component, one end of the first magnetic component is arranged in the cover body, and the other end of the first magnetic component penetrates through the polishing wheel and is in threaded connection with the first driving component;
the magnetic force driving device comprises a second driving component and a second magnetic component connected with the output end of the second driving component, and when the second magnetic component is in butt joint with the cover body, the second driving component is used for driving the first magnetic component to rotate and driving the second magnetic component to rotate.
According to the valve polishing equipment, when the polishing wheel needs to be replaced, the magnetic driving device is close to the side face of the cover body, one side face of the cover body is abutted to one side face of the second magnetic assembly, and the influence of rotation of the cover body on disassembly and installation of the polishing structure in a subsequent process is avoided; starting a magnetic force driving device, and then starting to rotate the second magnetic assembly, wherein the magnetic field of the second magnetic assembly is interacted with the magnetic field of the first magnetic assembly to generate acting force on the first magnetic assembly, and the first magnetic assembly rotates along with the second magnetic assembly due to the change of the magnetic field of the second magnetic assembly; the first magnetic component rotates, and then the first magnetic component is disconnected with the first driving component in a threaded manner, so that the damaged polishing wheel is taken out and a new polishing wheel is replaced; and starting the magnetic driving device, and locking the polishing wheel on the output end of the first driving component through the reverse rotation of the second magnetic component. The valve polishing equipment solves the problem that the polishing wheel replacement efficiency of a traditional polishing machine is low.
Further, the first magnetic assembly comprises a threaded block, a first connecting shaft, a bearing and an elastic piece, a first through hole is formed in the cover body, one end of the first through hole penetrates through the cover body, and the other end of the first through hole is in a sealing state.
Further, the elastic piece is arranged in the first through hole, one end of the elastic piece is in butt joint with the cover body, the other end of the elastic piece is connected with the outer ring of the bearing, one end of the first connecting shaft is inserted in the inner ring of the bearing, the other end of the first connecting shaft is inserted in the threaded block and is in rotary connection with the threaded block, and the first connecting shaft is magnetic.
Further, one end of the thread block is arranged in the cover body, the other end of the thread block penetrates through the first through hole and extends out of the cover body, and one end of the thread block extending out of the cover body is in threaded connection with the first driving assembly.
Further, the threaded block comprises a threaded part, a fixed part and a rotating part, one end of the threaded part is in threaded connection with the first driving assembly, the other end of the threaded part is connected with the fixed part, a rotating space for inserting the first connecting shaft is formed in the fixed part, and one end of the first connecting shaft is inserted into the rotating space and is in rotating connection with the fixed part; the rotating part is arranged on the fixed part; the fixing part is abutted with the cover body.
Further, a rotating block is arranged on the inner ring of the bearing, and the rotating block is abutted with the rotating part.
Further, the rotating block comprises a first connecting portion and a second connecting portion, the first connecting portion is connected with the inner ring of the bearing, the first connecting portion and the second connecting portion are arranged in an L-shaped mode, and the second connecting portion is abutted to the rotating portion.
Further, the second magnetic component comprises a shell, a rotating shaft and a magnetic block; the outer contour of the magnetic block is in a cylindrical shape, the magnetic block is arranged in the shell, one end of the rotating shaft penetrates through the magnetic block and one side face of the shell, and the other end of the rotating shaft penetrates through the other side face of the shell and is connected with the output end of the second driving assembly; the rotating shaft is rotationally connected with the shell, and the rotating shaft and the magnetic block are coaxially arranged.
Further, the valve polishing apparatus further comprises a frame; the first driving assembly comprises a linear module, a transmission structure and a rotation driving block, wherein the linear module is arranged on the frame in the arrangement direction, and the rotation driving block is arranged on the frame; one end of the transmission structure is connected with the output end of the rotation driving block, and the other end of the transmission structure is connected with the moving end of the linear module and the first magnetic assembly respectively.
Further, the transmission structure comprises a first universal shaft, a second connecting shaft, a second rolling shaft and a moving block, one end of the first universal shaft is connected with the output end of the rotation driving block, the other end of the first universal shaft is connected with one end of the second universal shaft, the other end of the second universal shaft penetrates through the inner ring of the second rolling shaft and is connected with one end of the second connecting shaft, and the other end of the second connecting shaft is in threaded connection with the first driving assembly; the second rolling shaft is arranged in one end of the moving block, the outer ring of the second rolling shaft is connected with the moving block, and the other end of the moving block is connected with the moving end of the linear module.
Drawings
The invention will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is a schematic view of a valve polishing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of a portion of a valve polishing apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic view of a first magnetic assembly of a valve polishing apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic view of a second magnetic assembly of a valve polishing apparatus according to an embodiment of the present invention;
fig. 5 is an enlarged view of a portion a of fig. 3;
FIG. 6 is a second schematic view of a portion of a valve polishing apparatus according to an embodiment of the present invention.
Reference numerals illustrate:
1-a polishing device; 11-a first drive assembly; 12-polishing wheel; 13-a cover; 14-a first magnetic component; 141-a screw block; 142-a first connecting shaft; 143-bearings; 144-elastic members; 2-a second magnetic component; 21-a housing; 22-rotating shaft; 23-magnetic blocks; 3-a first through hole; 4-a threaded portion; 5-a fixing part; 6-a rotating part; 7-rotating the block; 71-a first connection; 72-a second connection; 8-a first cardan shaft; 9-a second cardan shaft; 10-a second connecting shaft; 31-a second roller; 32-moving blocks; 33-rotating the driving block; 34-a linear module.
Detailed Description
The present invention will be described in further detail with reference to the following examples thereof in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" in this specification do not denote a particular quantity or order, but rather are used for distinguishing between similar or identical items.
As shown in fig. 1 to 5, a valve polishing apparatus according to an embodiment of the present invention includes a polishing device 1 and a magnetic driving device; the polishing device 1 comprises a first driving component 11, a polishing wheel 12, a cover body 13 and a first magnetic component 14, wherein one end of the first magnetic component 14 is arranged in the cover body 13, and the other end of the first magnetic component 14 passes through the polishing wheel 12 and is in threaded connection with the first driving component 11; the magnetic force driving device comprises a second driving component and a second magnetic component 2 connected with the output end of the second driving component, and when the second magnetic component 2 is abutted to the cover 13, the second driving component is used for driving the first magnetic component 14 to rotate and driving the second magnetic component 2 to rotate.
According to the valve polishing equipment, when the polishing wheel 12 needs to be replaced, the valve polishing equipment is close to the side face of the cover body 13 through the magnetic driving device, one side face of the cover body 13 is abutted to one side face of the second magnetic assembly 2, and the influence on the disassembly and the installation of the polishing structure due to the fact that the cover body 13 rotates in the subsequent process is avoided; starting a magnetic force driving device, and then starting to rotate the second magnetic assembly 2, wherein the magnetic field of the second magnetic assembly 2 is interacted with the magnetic field of the first magnetic assembly 14 due to the change of the magnetic field of the second magnetic assembly 2, so that acting force is generated on the first magnetic assembly 14, and the first magnetic assembly 14 rotates along with the second magnetic assembly 2; by rotating the first magnetic assembly 14, and then disconnecting the first magnetic assembly 14 from the first drive assembly 11, removal of the damaged polishing wheel 12 and replacement of a new polishing wheel 12 is achieved; the magnetic driving device is started, and the second magnetic assembly 2 is reversed, so that the polishing wheel 12 is locked on the output end of the first driving assembly 11. The valve polishing apparatus solves the problem of inefficiency in replacing the polishing wheel 12 of the conventional polishing machine.
As shown in fig. 2 to 4, in one embodiment, the first magnetic assembly 14 includes a threaded block 141, a first connecting shaft 142, a bearing 143, and an elastic member 144, the cover 13 is provided with a first through hole 3, one end of the first through hole 3 passes through the cover 13, and the other end of the first through hole 3 is in a sealed state; the elastic member 144 is disposed in the first through hole 3, one end of the elastic member 144 abuts against the cover 13, the other end of the elastic member 144 is connected with the outer ring of the bearing 143, one end of the first connecting shaft 142 is inserted into the inner ring of the bearing 143, the other end of the first connecting shaft 142 is inserted into the threaded block 141 and is rotationally connected with the threaded block 141, and the first connecting shaft 142 has magnetism. Thus, by providing the elastic member 144, the screw block 141 can reciprocate in the first through hole 3; when the polishing wheel 12 is dismounted, the threaded block 141 moves into the first through hole 3, so that the threaded block 141 is conveniently disconnected with the first driving assembly 11; when the polishing wheel 12 is locked, an outward force is applied to the screw block 141 by the elastic member 144, so that the screw block 141 is screwed with the first driving assembly 11.
As shown in fig. 2 to 4, in one embodiment, one end of the threaded block 141 is disposed in the cover 13, the other end of the threaded block 141 passes through the first through hole 3 and extends out of the cover 13, and one end of the threaded block 141 extending out of the cover 13 is in threaded connection with the first driving assembly 11; the screw block 141 includes a screw portion 4, a fixing portion 5, and a rotating portion 6, one end of the screw portion 4 is in threaded connection with the first driving assembly 11, the other end of the screw portion 4 is connected with the fixing portion 5, a rotating space for inserting the first connecting shaft 142 is provided on the fixing portion 5, and one end of the first connecting shaft 142 is inserted into the rotating space and is in rotational connection with the fixing portion 5; the rotating part 6 is arranged on the fixed part 5; the fixing part 5 is abutted against the cover 13; a rotating block 7 is arranged on the inner ring of the bearing 143, and the rotating block 7 is abutted against the rotating part 6; the rotating block 7 includes a first connecting portion 71 and a second connecting portion 72, the first connecting portion 71 is connected to the inner ring of the bearing 143, the first connecting portion 71 and the second connecting portion 72 are provided in an L-shape, and the second connecting portion 72 abuts against the rotating portion 6; the second magnetic component 2 comprises a shell 21, a rotating shaft 22 and a magnetic block 23; the outer contour of the magnetic block 23 is in a cylindrical shape, the magnetic block 23 is arranged in the housing 21, one end of the rotating shaft 22 passes through the magnetic block 23 and one side surface of the housing 21, and the other end of the rotating shaft 22 passes through the other side surface of the housing 21 and is connected with the output end of the second driving assembly; the rotating shaft 22 is rotatably connected with the shell 21, and the rotating shaft 22 and the magnetic block 23 are coaxially arranged; specifically, the inner ring of the bearing 143 is fixedly connected to the first connecting shaft 142. Thus, when the second magnetic assembly 2 is started, the magnetic block 23 rotates to generate an acting force on the first connecting shaft 142 with magnetism, the first connecting shaft 142 rotates and drives the rotating block 7 to rotate, the rotating block 7 is abutted with the rotating part 6, and then the threaded part 4 is driven to rotate; the screw thread part 4 is driven to rotate reversely by reversing the magnetic block 23; by providing the roller, the friction force when the first connecting shaft 142 rotates is reduced; the elastic piece 144 is connected with the outer ring of the bearing 143, so that the elastic piece 144 is prevented from contacting the first connecting shaft 142, and friction force is prevented from being increased when the first connecting shaft 142 rotates; the fixing part 5 is abutted with the cover 13, so that the first magnetic component 14 and the cover 13 are prevented from being separated.
As shown in fig. 1 to 6, in one embodiment, the valve polishing apparatus further includes a frame; the first driving assembly 11 comprises a linear module 34, a transmission structure and a rotation driving block 33, wherein the linear module 34 is arranged on the frame in the arrangement direction, and the rotation driving block 33 is arranged on the frame; one end of the transmission structure is connected with the output end of the rotation driving block 33, and the other end of the transmission structure is connected with the moving end of the linear module 34 and the first magnetic assembly 14 respectively; the transmission structure comprises a first universal shaft 8, a second universal shaft 9, a second connecting shaft 10, a second rolling shaft 31 and a moving block 32, one end of the first universal shaft 8 is connected with the output end of the rotation driving block 33, the other end of the first universal shaft 8 is connected with one end of the second universal shaft 9, the other end of the second universal shaft 9 penetrates through the inner ring of the second rolling shaft 31 and is connected with one end of the second connecting shaft 10, and the other end of the second connecting shaft 10 is in threaded connection with the first driving assembly 11; the second roller 31 is disposed in one end of the moving block 32, an outer ring of the second roller 31 is connected with the moving block 32, and the other end of the moving block 32 is connected with a moving end of the linear module 34. Thus, according to the processing requirement, the linear module 34 drives the moving block 32 to move, so that the polishing wheel 12 is driven to adjust the processing height, and a worker can polish the valve conveniently.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A valve polishing apparatus, comprising:
the polishing device comprises a first driving component, a polishing wheel, a cover body and a first magnetic component, one end of the first magnetic component is arranged in the cover body, and the other end of the first magnetic component penetrates through the polishing wheel and is in threaded connection with the first driving component;
the magnetic force driving device comprises a second driving component and a second magnetic component connected with the output end of the second driving component, and when the second magnetic component is in butt joint with the cover body, the second driving component is used for driving the first magnetic component to rotate and driving the second magnetic component to rotate.
2. The valve polishing apparatus according to claim 1, wherein the first magnetic component comprises a screw block, a first connecting shaft, a bearing and an elastic member, the cover body is provided with a first through hole, one end of the first through hole penetrates through the cover body, and the other end of the first through hole is in a sealed state.
3. The valve polishing apparatus according to claim 2, wherein the elastic member is provided in the first through hole, one end of the elastic member abuts against the cover body, the other end of the elastic member is connected with the outer ring of the bearing, one end of the first connecting shaft is inserted into the inner ring of the bearing, the other end of the first connecting shaft is inserted into the screw block and is rotatably connected with the screw block, and the first connecting shaft has magnetism.
4. The valve polishing apparatus of claim 3, wherein one end of the threaded block is disposed in the cover body, the other end of the threaded block passes through the first through hole and extends out of the cover body, and one end of the threaded block extending out of the cover body is in threaded connection with the first driving assembly.
5. The valve polishing apparatus according to claim 4, wherein the screw block includes a screw part, a fixing part, and a rotating part, one end of the screw part is screw-coupled with the first driving assembly, the other end of the screw part is coupled with the fixing part, a rotating space for the first coupling shaft to be inserted is provided on the fixing part, and one end of the first coupling shaft is inserted into the rotating space and is rotatably coupled with the fixing part; the rotating part is arranged on the fixed part; the fixing part is abutted with the cover body.
6. The valve polishing apparatus according to claim 5, wherein a rotating block is provided on an inner ring of the bearing, the rotating block being abutted against the rotating portion.
7. The valve polishing apparatus according to claim 6, wherein the rotating block includes a first connecting portion connected to the inner ring of the bearing and a second connecting portion provided in an L-shape, the second connecting portion abutting the rotating portion.
8. The valve polishing apparatus of claim 1, wherein the second magnetic assembly comprises a housing, a shaft, and a magnetic block; the outer contour of the magnetic block is in a cylindrical shape, the magnetic block is arranged in the shell, one end of the rotating shaft penetrates through the magnetic block and one side face of the shell, and the other end of the rotating shaft penetrates through the other side face of the shell and is connected with the output end of the second driving assembly; the rotating shaft is rotationally connected with the shell, and the rotating shaft and the magnetic block are coaxially arranged.
9. The valve polishing apparatus of claim 1, further comprising a frame; the first driving assembly comprises a linear module, a transmission structure and a rotation driving block, wherein the linear module is arranged on the frame in the arrangement direction, and the rotation driving block is arranged on the frame; one end of the transmission structure is connected with the output end of the rotation driving block, and the other end of the transmission structure is connected with the moving end of the linear module and the first magnetic assembly respectively.
10. The valve polishing apparatus according to claim 9, wherein the transmission structure includes a first universal shaft, a second connecting shaft, a second roller, and a moving block, one end of the first universal shaft is connected to the output end of the rotation driving block, the other end of the first universal shaft is connected to one end of the second universal shaft, the other end of the second universal shaft passes through the inner ring of the second roller and is connected to one end of the second connecting shaft, and the other end of the second connecting shaft is screwed to the first driving assembly; the second rolling shaft is arranged in one end of the moving block, the outer ring of the second rolling shaft is connected with the moving block, and the other end of the moving block is connected with the moving end of the linear module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410184199.1A CN117733718A (en) | 2024-02-19 | 2024-02-19 | Valve polishing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410184199.1A CN117733718A (en) | 2024-02-19 | 2024-02-19 | Valve polishing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117733718A true CN117733718A (en) | 2024-03-22 |
Family
ID=90261247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410184199.1A Pending CN117733718A (en) | 2024-02-19 | 2024-02-19 | Valve polishing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117733718A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110744410A (en) * | 2019-11-18 | 2020-02-04 | 湖南航天磁电有限责任公司 | Ferrite magnetic product quick replacement grinding frock |
| CN210025441U (en) * | 2019-03-15 | 2020-02-07 | 南京盛略科技有限公司 | Cutting and polishing integrated machine |
| CN215257232U (en) * | 2021-05-28 | 2021-12-21 | 佛山市帕客家居用品有限公司 | Magnetic connecting structure |
| CN114728348A (en) * | 2019-09-04 | 2022-07-08 | J·塞尔温 | Device for attachment to a rotary tool |
| US20230038035A1 (en) * | 2021-08-09 | 2023-02-09 | Globalwafers Co., Ltd. | Ingot jig assembly and ingot edge-polishing machine tool |
| CN218697478U (en) * | 2022-10-17 | 2023-03-24 | 广东集才管益不锈钢水管有限公司 | Cylindrical polishing machine |
| CN219255023U (en) * | 2022-12-26 | 2023-06-27 | 大连汇鸿精密模塑有限公司 | Grinding wheel fastening device of surface grinder |
-
2024
- 2024-02-19 CN CN202410184199.1A patent/CN117733718A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210025441U (en) * | 2019-03-15 | 2020-02-07 | 南京盛略科技有限公司 | Cutting and polishing integrated machine |
| CN114728348A (en) * | 2019-09-04 | 2022-07-08 | J·塞尔温 | Device for attachment to a rotary tool |
| CN110744410A (en) * | 2019-11-18 | 2020-02-04 | 湖南航天磁电有限责任公司 | Ferrite magnetic product quick replacement grinding frock |
| CN215257232U (en) * | 2021-05-28 | 2021-12-21 | 佛山市帕客家居用品有限公司 | Magnetic connecting structure |
| US20230038035A1 (en) * | 2021-08-09 | 2023-02-09 | Globalwafers Co., Ltd. | Ingot jig assembly and ingot edge-polishing machine tool |
| CN218697478U (en) * | 2022-10-17 | 2023-03-24 | 广东集才管益不锈钢水管有限公司 | Cylindrical polishing machine |
| CN219255023U (en) * | 2022-12-26 | 2023-06-27 | 大连汇鸿精密模塑有限公司 | Grinding wheel fastening device of surface grinder |
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