A glass sleeve grinding tool

Abstract

The present application discloses a glass sleeve grinding tool, which relates to the technical field of glass sleeve processing equipment, and includes a base, a clamping tool and a grinding piece, wherein a main shaft is rotatably provided on the base, a motor for driving the main shaft to rotate is provided on the base, a fixing structure for fixing the clamping tool is provided on the main shaft, the clamping tool is used to clamp and fix the glass sleeve, a mounting frame is fixedly provided on the base, an adjustment frame is slidably provided on the mounting frame in a direction close to or away from the base, a limiter is provided on the mounting frame for preventing the adjustment frame from sliding, a connecting frame is slidably provided on the adjustment frame along the axial direction of the main shaft, a driving member for driving the connecting frame to slide is provided on the adjusting frame, a connecting assembly for connecting the grinding piece is provided on the connecting frame, and the grinding piece is used to grind the surface of the glass sleeve. The present application can realize efficient and stable grinding processing of the outer surface and inner surface of the glass sleeve.

Description

Technical Field

[0001] The present application relates to the technical field of glass sleeve processing equipment, and in particular to a glass sleeve grinding tool. Background Art

[0002] Glass sleeves are widely used in the precision manufacturing industry, particularly in optical instruments and medical devices. To ensure product quality and performance, the surface quality of glass sleeves is crucial. In recent years, with technological advancements and growing market demand, the application scope of glass sleeves has continued to expand, and the requirements for their surface treatment have also increased. High-quality surface treatment not only enhances the product's aesthetic appearance but also extends its service life and reduces failure rates, thereby improving overall production efficiency and market competitiveness.

[0003] Currently, the most common surface treatment methods for glass sleeves include manual grinding and mechanical grinding. However, traditional mechanical grinding equipment primarily focuses on treating the outer surface of glass sleeves, while manual grinding is often used to grind the inner surface. While manual grinding offers high flexibility, it is labor-intensive and results in poor product consistency, impacting product quality. Therefore, designing a tool that can efficiently grind both the inner and outer surfaces of glass sleeves has become a pressing technical challenge. Summary of the Invention

[0004] In response to the problems existing in the prior art, the present application provides a glass sleeve grinding tool.

[0005] This application provides a glass sleeve grinding tool, which adopts the following technical solution:

[0006] A glass sleeve grinding tool comprises a base, a clamping tool and a grinding piece, wherein a main shaft is rotatably provided on the base, a motor for driving the main shaft to rotate is provided on the base, a fixing structure for fixing the clamping tool is provided on the main shaft, the clamping tool is used to clamp and fix the glass sleeve, a mounting frame is fixedly provided on the base, an adjustment frame is provided on the mounting frame for sliding in a direction close to or away from the base, a limiter is provided on the mounting frame for preventing the adjustment frame from sliding, a connecting frame is provided on the adjustment frame for sliding along the axial direction of the main shaft, a driving piece is provided on the adjustment frame for driving the connecting frame to slide, a connecting assembly for connecting the grinding piece is provided on the connecting frame, and the grinding piece is used to grind the surface of the glass sleeve.

[0007] Optionally, the clamping tool includes a first fixed frame and a clamping plate, the fixing structure is used to fix the first fixed frame on the main shaft, the first fixed frame is adapted to the interior of the glass sleeve and is used to be inserted into the glass sleeve, a positioning plate is fixedly provided at the end of the first fixed frame, the clamping plate is fixed to the end on the other side of the first fixed frame by bolts, and the positioning plate and the clamping plate are used to clamp the two ends of the glass sleeve, and the grinding piece is used to grind the outer surface of the glass sleeve.

[0008] Optionally, the fixing structure includes a mounting sleeve coaxially fixed on the main shaft, the mounting sleeve is adapted to the positioning plate and is used to be sleeved on the positioning plate, and the positioning plate is fixed in the mounting sleeve by bolts.

[0009] Optionally, the grinding member is arc-shaped, and an inner side wall of the grinding member is provided with a grinding surface, and the grinding surface is adapted to the outer side wall of the glass sleeve.

[0010] Optionally, the clamping tool includes a second fixed frame and a clamping ring, the fixing structure is used to fix the second fixed frame on the main shaft, the interior of the second fixed frame is provided with a placement groove adapted to the glass sleeve, the clamping ring is fixed to the end of the second fixed frame by bolts, and is used to press the glass sleeve into the placement groove of the second fixed frame, and the grinding piece is used to grind the inner surface of the glass sleeve.

[0011] Optionally, the fixing structure includes fixing bolts, and the end of the second fixing frame is fixed with an end plate by bolts. The end plate is provided with a mounting groove, which is adapted to the main shaft and is used for inserting the main shaft. The fixing bolts are used to fix the end plate on the main shaft.

[0012] Optionally, a positioning plate is sleeved and fixed on the main shaft, and a plurality of positioning blocks are fixedly provided on one end of the positioning plate close to the end plate, and a plurality of positioning grooves are opened on one end of the end plate close to the positioning plate. The positioning blocks correspond to the positioning grooves one by one and are used to be inserted into the corresponding positioning grooves.

[0013] Optionally, the grinding member is arc-shaped, and an outer side wall of the grinding member is provided with a grinding surface, and the grinding surface is adapted to the inner side wall of the glass sleeve.

[0014] Optionally, the connecting assembly includes a connecting sleeve and a mounting rod, the connecting sleeve is fixed on the connecting frame, both ends of the connecting sleeve are provided with a plug-in groove adapted to the mounting rod, the mounting rod is used to pass through the plug-in groove of the connecting sleeve and have an interference fit with the connecting sleeve, and the grinding part is installed on the mounting rod.

[0015] Optionally, a connecting rod is fixedly provided on the mounting rod, a spherical body is fixedly provided on the end of the connecting rod, a spherical groove adapted to the spherical body is provided on the grinding piece, and when the grinding surface is provided on the inner wall of the grinding piece, the spherical groove is provided on the outer wall of the grinding piece, and when the grinding surface is provided on the outer wall of the grinding piece, the spherical groove is provided on the inner wall of the grinding piece, an elastic limit strip is passed through the spherical groove, and a limit groove for placing the elastic limit strip is provided on the grinding piece.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. The present application can realize efficient and stable grinding of the outer and inner surfaces of the glass sleeve. Specifically, the clamping fixture is fixed on the main shaft, and then the glass sleeve is clamped and fixed on the clamping fixture. The grinding piece is connected to the connecting frame through the connecting assembly. When the outer surface of the glass sleeve needs to be ground, the adjustment frame is driven to slide, the position of the connecting frame is adjusted, and the grinding piece is brought into contact with the outer surface of the glass sleeve. Then, the main shaft is driven to rotate by the motor, driving the glass sleeve to rotate. At the same time, the connecting frame is driven to slide along the axial direction of the main shaft by the driving member, driving the grinding piece to slide along the axial direction of the glass sleeve on the surface of the glass sleeve, thereby achieving grinding of the outer surface of the glass sleeve. When the inner surface of the glass sleeve needs to be ground, the position of the adjustment frame is readjusted, and the grinding piece is brought into the glass sleeve and into contact with the inner surface of the glass sleeve. After that, the motor drives the glass sleeve to rotate, and the driving member drives the grinding piece to slide along the axial direction of the glass sleeve in the glass sleeve, thereby achieving grinding of the inner surface of the glass sleeve.

[0018] 2. This application provides a connecting rod on the mounting rod, a spherical body at the end of the connecting rod, and a spherical groove on the grinding piece that matches the spherical body, so that the grinding piece can be flexibly adjusted in angle, thereby making the grinding piece better fit the inner or outer surface of the glass sleeve. At the same time, the provision of an elastic limit strip further improves the stability of the grinding piece, prevents the grinding piece from shifting or falling off during the grinding process, and ensures the grinding quality of the inner or outer surface of the glass sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present application;

[0020] Figure 2 This is a schematic diagram of the structure of the clamping tool used in Example 1 of the present application;

[0021] Figure 3 This is a cross-sectional view of the structure of the clamping tool used in Example 1 of the present application;

[0022] Figure 4This is a schematic diagram of the structure of the connection component used in Example 1 of the present application;

[0023] Figure 5 yes Figure 4 Magnified view of section A;

[0024] Figure 6 This is a schematic diagram of the overall structure of Example 2 of the present application;

[0025] Figure 7 This is a schematic diagram of the structure of the clamping tool used in Example 2 of the present application;

[0026] Figure 8 This is a cross-sectional view of the structure of the clamping tool used in Example 2 of the present application;

[0027] Figure 9 This is a schematic diagram of the structure of the connection component used in Example 2 of the present application;

[0028] Figure 10 yes Figure 9 Magnified view of part B.

[0029] Explanation of the accompanying drawings: 1. Base; 11. Support frame; 12. Motor; 13. Mounting frame; 14. Adjusting frame; 15. Limiting screw; 16. Turning handle; 17. Rodless cylinder; 2. Clamping tool; 21. First fixed frame; 211. Positioning plate; 22. Clamping plate; 23. Rubber gasket; 24. Second fixed frame; 241. End plate; 242. Positioning groove; 25. Clamping ring; 3. Grinding part; 31. Spherical groove; 32. Limiting groove; 4. Spindle; 41. Mounting sleeve; 42. Positioning plate; 421. Positioning block; 43. Fixing bolt; 5. Connecting frame; 51. Connecting sleeve; 511. Plug-in slot; 52. Mounting rod; 53. Connecting rod; 531. Sphere; 532. Elastic limiting strip. DETAILED DESCRIPTION

[0030] The following will be combined with the Figure 1 -Attached Figure 10 The technical solutions in the embodiments of the present invention are clearly and completely described. The described embodiments are only possible technical implementations of the present invention and do not constitute a complete set of implementations. Those skilled in the art can combine the embodiments of the present invention to derive other embodiments without inventive work, and such embodiments are also within the scope of protection of the present invention.

[0031] The inventors of this application have discovered that traditional mechanical grinding equipment mainly focuses on processing the outer surface of the glass sleeve, while the inner surface of the glass sleeve is often ground manually. Although manual grinding is highly flexible, it has problems such as high labor intensity and poor product consistency, which affect product quality. To this end, this application discloses a glass sleeve grinding tool that mainly adopts the following scheme to achieve efficient and stable grinding of the outer and inner surfaces of the glass sleeve. The application is further described in detail below.

[0032] Example 1

[0033] The embodiment of the present application discloses a glass sleeve grinding tool. Figure 1 , comprising a base 1, a clamping fixture 2 and a grinding piece 3. A support frame 11 is fixedly provided on the base 1, on which a spindle 4 is rotatably provided. The axial direction of the spindle 4 is parallel to the upper end face of the base 1. A motor 12 is fixedly provided on the support frame 11. The output shaft of the motor 12 is coaxially fixedly connected to the spindle 4 for driving the spindle 4 to rotate. A fixing structure for fixing the clamping fixture 2 is provided on the spindle 4. A mounting frame 13 is fixedly provided on the base 1, on which an adjustment frame 14 is slidably provided in a direction perpendicular to the upper end face of the base 1. A connecting frame 5 is slidably provided on the adjusting frame 14 in the axial direction of the spindle 4. A connecting assembly for connecting the grinding piece 3 is provided on the connecting frame 5.

[0034] Reference Figure 1 A limit member is provided on the mounting frame 13 for preventing the adjusting frame 14 from sliding. Specifically, the limit member includes a limit screw 15. The limit screw 15 is rotatably set on the mounting frame 13 and is threadedly engaged with the adjusting frame 14. The axial direction of the limit screw 15 is perpendicular to the upper end surface of the base, and a rotating handle 16 is coaxially fixed on the limit screw 15.

[0035] Reference Figure 1 A driving member for driving the connecting frame 5 to slide is provided on the adjusting frame 14, and the driving member includes a rodless cylinder 17. The rodless cylinder 17 is also fixedly provided on the adjusting frame 14, and the length direction of the rodless cylinder 17 is parallel to the axial direction of the main shaft 4, and the piston of the rodless cylinder 17 is fixedly connected to the connecting frame 5.

[0036] Reference Figure 2Specifically, the clamping tool 2 includes a first fixed frame 21 and a clamping plate 22. The first fixed frame 21 is adapted to the interior of the glass sleeve and is used to be inserted into the glass sleeve. A positioning plate 211 is fixedly provided at the end of one side of the first fixed frame 21, and the clamping plate 22 is fixed to the end of the other side of the first fixed frame 21 by bolts, and the positioning plate 211 and the clamping plate 22 work together to clamp the glass sleeve on the first fixed frame 21. When the glass sleeve is fixed on the first fixed frame 21, the outer surface of the glass sleeve is completely exposed to the environment. When the glass sleeve is installed, a rubber gasket 23 is arranged between the positioning plate 211 and the glass sleeve.

[0037] Reference Figure 3 The fixing structure includes a mounting sleeve 41 coaxially fixed on the main shaft 4, a positioning plate 42 coaxially fixed on the main shaft 4, the mounting sleeve 41 is sleeved and fixed on the positioning plate 42, the mounting sleeve 41 is adapted to the positioning plate 211, and is used to be sleeved on the positioning plate 211, and the positioning plate 211 is fixed in the mounting sleeve 41 by bolts, ensuring that the first fixed frame 21 is firmly fixed on the main shaft 4 to prevent shaking during high-speed operation, and when the glass sleeve is fixed on the first fixed frame, the central axis of the main shaft 4 coincides with the central axis of the glass sleeve.

[0038] Reference Figure 4 The grinding member 3 is arc-shaped, and its inner sidewall is provided with a grinding surface. The grinding surface is adapted to the outer sidewall of the glass sleeve and is used to grind the outer surface of the glass sleeve. In actual processing, the curvature of the grinding member 3 can be selected according to the size of the required glass sleeve, and the grinding member 3 can be mounted on the connecting frame 5 via the connecting assembly. At the same time, the grinding member 3 can also be customized with different materials according to the desired grinding and polishing effect, and the abrasive grain size of the grinding surface can be adjusted.

[0039] Reference Figure 4 、 5The connecting assembly includes a connecting sleeve 51 and a mounting rod 52. The connecting sleeve 51 is fixed to the connecting frame 5 by bolts. Both ends of the connecting sleeve 51 are provided with a plug-in slot 511 adapted to the mounting rod 52. The mounting rod 52 is used to be inserted into the plug-in slot 511 of the connecting sleeve 51 and has an interference fit with the connecting sleeve 51. A connecting rod 53 is inserted and fixedly provided on the mounting rod 52. A spherical body 531 is fixedly provided at the end of the connecting rod 53. A spherical groove 31 adapted to the spherical body 531 is provided on the outer wall of the grinding member 3. An elastic limiting strip 532 is inserted into the spherical groove 31. A limiting groove 32 for receiving the elastic limiting strip 532 is provided on the grinding member 3. This design allows the grinding member 3 to flexibly adjust its angle, thereby making the grinding member 3 better fit the outer surface of the glass sleeve. At the same time, the provision of the elastic limiting strip 532 further improves the stability of the grinding piece 3, preventing the grinding piece 3 from shifting or falling off during the grinding process, thereby ensuring the grinding quality of the inner or outer surface of the glass sleeve.

[0040] The implementation principle of a glass sleeve grinding tool in Example 1 of the present application is as follows: a clamping tool 2 is fixed on the main shaft 4, and then the glass sleeve is clamped and fixed on the first fixed frame 21, and the grinding piece 3 is connected to the connecting frame 5 through a connecting assembly, and the adjustment frame 14 is driven to slide, and the position of the connecting frame 5 is adjusted, and the grinding surface of the inner side wall of the grinding piece 3 abuts the outer surface of the glass sleeve; then, the main shaft 4 is driven to rotate by the motor 12, driving the glass sleeve to rotate, and at the same time, the connecting frame 5 is driven to slide along the axial direction of the main shaft 4 by the rodless cylinder 17, driving the grinding piece 3 to slide along the axial direction of the glass sleeve on the outer surface of the glass sleeve, thereby grinding the outer surface of the glass sleeve. The whole process has a high degree of automation, greatly reducing manual intervention, and improving work efficiency and product quality.

[0041] Example 2

[0042] The difference from Example 1 is: Figure 6 、 7The clamping fixture 2 includes a second fixed frame 24 and a clamping ring 25. The second fixed frame 24 is provided with a placement groove adapted to the glass sleeve, and the second fixed frame 24 is used to be mounted on the outside of the glass sleeve. The clamping ring 25 is fixed to the end of the second fixed frame 24 by a plurality of evenly distributed bolts. After the glass sleeve is placed in the placement groove of the second fixed frame 24, the clamping ring 25 is threadedly connected to the end of the second fixed frame 24. The clamping ring 25 abuts the end of the glass sleeve, and the tightening force of the bolts is adjusted according to actual needs to ensure that the glass sleeve is firmly fixed in the placement groove of the second fixed frame 24. When the glass sleeve is fixed in the first fixed frame 21, the inner surface of the glass sleeve is completely exposed to the environment. When the glass sleeve is installed, a rubber gasket 23 is placed in the placement groove, and the rubber gasket 23 is covered between the glass sleeve and the bottom wall of the placement groove.

[0043] Reference Figure 8 The fixing structure is used to secure the second fixing frame 24 to the spindle 4. Specifically, the fixing structure includes fixing bolts 43. An end plate 241 is fixed to the end of the second fixing frame 24 via bolts. The end plate 241 has a mounting slot that mates with the spindle 4 for insertion. The fixing bolts 43 secure the end plate 241 to the spindle 4, ensuring that the second fixing frame 24 is securely fixed to the spindle 4 and preventing shaking during the grinding process. Furthermore, when the glass sleeve is secured within the second fixing frame, the central axis of the spindle 4 coincides with the central axis of the glass sleeve.

[0044] Reference Figure 7 、 8 A plurality of positioning blocks 421 are fixedly provided on one end of the positioning disk 42 close to the end plate 241, and a plurality of positioning grooves 242 are opened on the end of the end plate 241 close to the positioning disk 42. The positioning blocks 421 correspond to the positioning grooves 242 one by one and are used to be inserted into the corresponding positioning grooves 242; when the second fixed frame 24 is fixed on the main shaft 4, each positioning block 421 on the positioning disk 42 is inserted into the corresponding positioning groove 242 on the end plate 241, further increasing the stability of the second fixed frame 24 during installation.

[0045] Reference Figure 9 、 10 The grinding member 3 used in this embodiment is also arc-shaped, with a grinding surface provided on its outer sidewall. The grinding surface is adapted to mate with the inner sidewall of the glass sleeve and is used to grind the inner surface of the glass sleeve. The inner sidewall of the grinding member 3 is provided with a spherical groove 31 adapted to mate with the sphere 531, and a limiting groove 32 for accommodating the elastic limiting strip 532.

[0046] The implementation principle of a glass sleeve grinding tool in Example 2 of the present application is as follows: when it is necessary to grind the inner surface of the glass sleeve, the corresponding clamping tool 2 and the grinding piece 3 are replaced, the clamping tool 2 is fixed on the main shaft 4, and then the glass sleeve is clamped and fixed in the second fixed frame 24. The corresponding grinding piece 3 is connected to the connecting frame 5 through the connecting component, and the position of the adjusting frame 14 is readjusted so that the grinding piece 3 enters the glass sleeve and the grinding surface of the outer wall of the grinding piece 3 abuts the inner surface of the glass sleeve. After that, the main shaft 4 is driven to rotate by the motor 12, driving the glass sleeve to rotate. At the same time, the connecting frame 5 is driven by the rodless cylinder 17 to slide along the axial direction of the main shaft 4, driving the grinding piece 3 to slide along the axial direction of the glass sleeve in the glass sleeve to achieve grinding of the inner surface of the glass sleeve. The whole process has a high degree of automation, avoids the problems of high labor intensity and poor product consistency caused by manual grinding, and significantly improves production efficiency and product quality.

[0047] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A glass sleeve grinding tool, characterized by: The invention comprises a base (1), a clamping tool (2) and a grinding piece (3); a main shaft (4) is rotatably provided on the base (1); a motor (12) is provided on the base (1) for driving the main shaft (4) to rotate; a fixing structure for fixing the clamping tool (2) is provided on the main shaft (4); the clamping tool (2) is used to clamp and fix the glass sleeve; a mounting frame (13) is fixedly provided on the base (1); an upper edge of the mounting frame (13) is close to or away from the base An adjusting frame (14) is provided for sliding in the direction of the seat (1), a limiting member for preventing the adjusting frame (14) from sliding is provided on the mounting frame (13), a connecting frame (5) is provided for sliding along the axial direction of the main shaft (4) on the adjusting frame (14), a driving member for driving the connecting frame (5) to slide is provided on the adjusting frame (14), a connecting assembly for connecting a grinding member (3) is provided on the connecting frame (5), and the grinding member (3) is used for grinding the surface of the glass sleeve; The connecting assembly comprises a connecting sleeve (51) and a mounting rod (52); the connecting sleeve (51) is fixed on the connecting frame (5); both ends of the connecting sleeve (51) are provided with a plug-in slot (511) adapted to the mounting rod (52); the mounting rod (52) is used to be inserted into the plug-in slot (511) of the connecting sleeve (51) and to be interference-fitted with the connecting sleeve (51); the grinding member (3) is mounted on the mounting rod (52); A connecting rod (53) is fixedly provided on the mounting rod (52), a spherical body (531) is fixedly provided on the end of the connecting rod (53), a spherical groove (31) adapted to the spherical body (531) is provided on the grinding piece (3), and when the grinding surface is provided on the inner wall of the grinding piece (3), the spherical groove (31) is provided on the outer wall of the grinding piece (3), and when the grinding surface is provided on the outer wall of the grinding piece (3), the spherical groove (31) is provided on the inner wall of the grinding piece (3), an elastic limiting strip (532) is passed through the spherical groove (31), and a limiting groove (32) for accommodating the elastic limiting strip (532) is provided on the grinding piece (3).

2. A glass sleeve grinding tool according to claim 1, characterized in that: The clamping fixture (2) comprises a first fixing frame (21) and a clamping plate (22); the fixing structure is used to fix the first fixing frame (21) on the main shaft (4); the first fixing frame (21) is adapted to the interior of the glass sleeve and is used to be inserted into the glass sleeve; a positioning plate (211) is fixedly provided at the end of the first fixing frame; the clamping plate (22) is fixed to the end of the other side of the first fixing frame (21) by bolts; and the positioning plate (211) and the clamping plate (22) are used to clamp the two ends of the glass sleeve; the grinding member (3) is used to grind the outer surface of the glass sleeve.

3. A glass sleeve grinding tool according to claim 2, characterized in that: The fixing structure comprises a mounting sleeve (41) coaxially fixedly arranged on the main shaft (4); the mounting sleeve (41) is adapted to the positioning plate (211) and is used to be sleeved on the positioning plate (211); the positioning plate (211) is fixed in the mounting sleeve (41) by bolts.

4. A glass sleeve grinding tool according to claim 2, characterized in that: The grinding piece (3) is arc-shaped, and the inner side wall of the grinding piece (3) is provided with a grinding surface, and the grinding surface is adapted to the outer side wall of the glass sleeve.

5. The glass sleeve grinding tool according to claim 1, characterized in that: The clamping fixture (2) comprises a second fixed frame (24) and a clamping ring (25); the fixing structure is used to fix the second fixed frame (24) on the main shaft (4); a placement groove adapted to the glass sleeve is provided inside the second fixed frame (24); the clamping ring (25) is fixed to the end of the second fixed frame (24) by bolts and is used to press and fix the glass sleeve in the placement groove of the second fixed frame (24); and the grinding member (3) is used to grind the inner surface of the glass sleeve.

6. A glass sleeve grinding tool according to claim 5, characterized in that: The fixing structure includes a fixing bolt (43), and an end plate (241) is fixed to the end of the second fixing frame (24) by means of a bolt. A mounting groove is provided on the end plate (241), and the mounting groove is adapted to fit the main shaft (4) and is used for inserting the main shaft (4). The fixing bolt (43) is used to fix the end plate (241) on the main shaft (4).

7. A glass sleeve grinding tool according to claim 6, characterized in that: A positioning disc (42) is sleeved and fixed on the main shaft (4); a plurality of positioning blocks (421) are fixedly provided on one end of the positioning disc (42) close to the end plate (241); a plurality of positioning grooves (242) are opened on one end of the end plate (241) close to the positioning disc (42); the positioning blocks (421) correspond to the positioning grooves (242) one by one and are used to be inserted into the corresponding positioning grooves (242).

8. The glass sleeve grinding tool according to claim 5, characterized in that: The grinding piece (3) is arc-shaped, and the outer side wall of the grinding piece (3) is provided with a grinding surface, and the grinding surface is adapted to the inner side wall of the glass sleeve.

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