Dressing device

Abstract

The utility model relates to the technical field of grinding wheel dressing, and provides a dressing device which comprises a base, a first fixing face and a second fixing face. The sliding part is in sliding connection with the base; the trimming part is connected with the sliding part, and the trimming part is driven by the sliding part to be adjusted to a preset position and used for trimming the external grinding part; when the first fixing face is fixed to the external machining platform, the trimming piece abuts against the periphery of the external grinding piece so as to trim the periphery of the external grinding piece, and when the second fixing face is fixed to the external machining platform, the trimming piece abuts against the side wall of the external grinding piece so as to trim the side wall of the external grinding piece. The trimming device is fixed to the external machining platform through the first fixing face or the second fixing face, so that different installation states of the trimming piece are switched, the trimming piece is driven to slide through the sliding piece, the trimming piece is adjusted to the preset position, the trimming process is reduced, and the trimming efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding wheel dressing, in particular to a dressing device. Background Art

[0002] In the field of precision grinding, dressing of grinding wheels is crucial for ensuring the machining accuracy of workpieces. Due to different characteristic structures and sizes of workpieces, the worn parts of grinding wheels are different. The existing dressing mechanisms are generally fixedly arranged on the machining platform. During dressing, it is necessary to frequently adjust the grinding wheel to cooperate with the dressing mechanism. At the same time, different dressing parts are required for dressing different worn parts of the grinding wheel, which makes the operation relatively complex, time-consuming, and inefficient. Summary of the Utility Model

[0003] In view of the above situation, it is necessary to provide a dressing device to improve the dressing efficiency.

[0004] An embodiment of the present application provides a dressing device, including:

[0005] A base having a first fixing surface and a second fixing surface perpendicular to each other;

[0006] A sliding member slidably connected to the base;

[0007] A dressing part connected to the sliding member, and the dressing part is adjusted to a preset position under the drive of the sliding member and is used for dressing an external grinding part;

[0008] Wherein, when the first fixing surface is fixed to an external machining platform, the dressing part abuts against the outer periphery of the external grinding part to dress the outer periphery of the external grinding part; when the second fixing surface is fixed to the external machining platform, the dressing part abuts against the side wall of the external grinding part to dress the side wall of the external grinding part.

[0009] When the above-mentioned dressing device is in use, when trimming the outer periphery of the external polishing part, the first fixed surface is fixed to the external processing platform, and the sliding part drives the dressing part to slide relative to the base to adjust the position of the dressing part, so as to adjust the dressing part to the first preset position, and then make the dressing part abut against the outer periphery of the external polishing part to trim the outer periphery of the external polishing part; when trimming the side wall of the external polishing part, the second fixed surface is fixed to the external processing platform, and the sliding part drives the dressing part to slide relative to the base to adjust the position of the dressing part, so as to adjust the dressing part to the second preset position, and then make the dressing part abut against the side wall of the external polishing part to trim the side wall of the external polishing part. In this way, by fixing the first fixed surface or the second fixed surface to the external processing platform, the dressing piece can be converted between different installation states to complete the outer periphery and side wall dressing of the external grinding piece. There is no need to use too many dressing mechanisms for dressing operations, thereby improving the dressing efficiency. In addition, by driving the dressing piece to slide relative to the base through the sliding piece, the dressing piece can be adjusted to a preset position, reducing the transfer distance of the grinding wheel between the workpiece and the dressing piece, thereby reducing the operating time of the dressing process and further improving the dressing efficiency.

[0010] In some embodiments, the base comprises:

[0011] A base, wherein the first fixing surface and the second fixing surface are arranged on the base;

[0012] The guide body is obliquely arranged on the base relative to the extension direction of the first fixed surface and the second fixed surface, the extension direction of the guide body intersects with the extension direction of the first fixed surface and the extension direction of the second fixed surface, and the guide body is slidably connected to the sliding member for guiding the sliding member.

[0013] In some embodiments, the guide body is provided with a sliding plane and a supporting slope, the sliding plane is provided on the side of the guide body away from the base, the supporting slope is provided on the side wall of the guide body and connected to the sliding plane, and the supporting slope is inclined relative to the sliding plane.

[0014] In some embodiments, the slider comprises:

[0015] A sliding body connected to the trimming member and provided with an opening, wherein the opening is provided on a side of the sliding body facing the guide body;

[0016] A mounting body is disposed on one side of the sliding body and is detachably connected to the sliding body. The mounting body cover is disposed on the opening to surround and form a guide groove. The guide groove has a bottom wall and a supporting matching surface connected to the bottom wall. The bottom wall corresponds to the sliding plane. The bottom wall is used to abut against the sliding plane when the sliding body slides. The supporting matching surface is arranged toward the supporting inclined surface; and

[0017] The locking body is movably inserted through the sliding body in a direction perpendicular to the extension direction of the sliding plane and is threadedly connected to the sliding body. The locking body is used to move in a direction close to the sliding plane under the action of an external force, so as to push the sliding body to abut against the abutting inclined surface through the abutting matching surface, thereby locking the sliding body to the base.

[0018] In some embodiments, the trimming device further includes:

[0019] A trial cutting piece, which is disposed on the sliding body at an interval from the trimming piece and is detachably connected to the sliding body;

[0020] Wherein, the trimmed external grinding piece cuts the trial cutting piece, and determines the trimming state of the external grinding piece based on the cutting state of the trial cutting piece.

[0021] In some embodiments, the sliding body is provided with a working surface, a storage groove and a receiving groove. The working surface is parallel to the first fixed surface and perpendicular to the second fixed surface. The storage groove and the receiving groove are disposed on the working surface at an interval. The storage groove and the receiving groove are respectively used to accommodate part of the trimming piece and part of the trial cutting piece, so as to position the trimming piece and the trial cutting piece respectively.

[0022] In some embodiments, the trial cutting piece includes:

[0023] A trial cutting body, one end of the trial cutting body penetrates into the receiving groove, and the other end of the trial cutting body extends out of the receiving groove;

[0024] A connecting body, which penetrates into the receiving groove and passes through the trial cutting body in a direction perpendicular to the direction from the first fixed surface to the working surface. The connecting body is threadedly connected to the sliding body, so that the trial cutting body is detachably connected to the sliding body.

[0025] In some embodiments, the receiving groove and the trial cutting body are in clearance fit in a direction perpendicular to the direction from the first fixed surface to the working surface.

[0026] In some embodiments, the trimming piece includes:

[0027] A trimming body, one end of the trimming piece penetrates into the storage groove, and the other end of the trimming piece is used to trim the external grinding piece;

[0028] A fixing body, which penetrates into the storage groove and passes through the trimming piece in a direction perpendicular to the extension direction of the trimming piece, and the fixing body is threadedly connected to the sliding body, so that the trimming piece is detachably connected to the sliding body.

[0029] In some embodiments, a clearance groove is formed in the sliding body, and the clearance groove is formed in the working surface for clearance of the locking body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 FIG. 6 is a perspective structural view of a trimming device provided by an embodiment of the present application.

[0031] Figure 2 is Figure 1 a perspective structural view of the trimming device shown from another angle.

[0032] Figure 3 is Figure 1 an exploded structural view of the trimming device shown.

[0033] LIST OF MAIN REFERENCE SIGNS

[0034] Trimming device 100

[0035] Base 10

[0036] First fixing surface 11

[0037] Second fixing surface 12

[0038] Base 13

[0039] Guide body 14

[0040] Sliding plane 141

[0041] Abutting inclined surface 142

[0042] Slider 20

[0043] Sliding body 21

[0044] Opening 211

[0045] Guide groove 212

[0046] Bottom wall 2121

[0047] Abutting and adapting surface 2122

[0048] Working surface 213

[0049] Receiving groove 214

[0050] Receiving groove 215

[0051] Clearance groove 216

[0052] Mounting body 22

[0053] Locking body 23

[0054] Trimming member 30

[0055] Dressing body 31

[0056] Fixing body 32

[0057] Test cutting piece 40

[0058] Test cutting body 41

[0059] Connecting body 42 Specific implementation manners

[0060] The following describes in detail the implementation manners of the present application. Examples of the implementation manners are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The implementation manners described below by referring to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0061] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for facilitating the description of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, it should be noted that the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0062] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be a direct connection or an indirect connection through an intermediate medium; it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to specific circumstances.

[0063] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0064] Please refer to Figure 1 , an embodiment of the present application provides a dressing device 100, which includes a base 10, a sliding member 20 and a dressing member 30 for dressing an external grinding member. Among them, the external grinding member may be a grinding wheel.

[0065] Please refer to Figure 1and Figure 2 , the base 10 has a first fixing surface 11 and a second fixing surface 12 that are perpendicular to each other. The sliding member 20 is slidably connected to the base 10, and the trimming member 30 is connected to the sliding member 20. The trimming member 30 is used to be adjusted to a preset position under the drive of the sliding member 20 and trim an external grinding member. Among them, please refer to Figure 1 , when the first fixing surface 11 is fixed to an external processing platform (not shown in the figure), the trimming member 30 abuts against the outer periphery of the external grinding member to trim the outer periphery of the external grinding member. Please refer to Figure 2 , when the second fixing surface 12 is fixed to the external processing platform, the trimming member 30 abuts against the side wall of the external grinding member to trim the side wall of the external grinding member.

[0066] When the above-mentioned trimming device 100 is in use, when trimming the outer periphery of the external grinding member, the first fixing surface 11 is fixed to the external processing platform, and then the sliding member 20 drives the trimming member 30 to slide relative to the base 10 to adjust the position of the trimming member 30, so as to adjust the trimming member 30 to the first preset position, and further make the trimming member 30 abut against the outer periphery of the external grinding member to trim the outer periphery of the external grinding member. When trimming the side wall of the external grinding member, the second fixing surface 12 is fixed to the external processing platform, and then the sliding member 20 drives the trimming member 30 to slide relative to the base 10 to adjust the position of the trimming member 30, so as to adjust the trimming member 30 to the second preset position, and further make the trimming member 30 abut against the side wall of the external grinding member to trim the side wall of the external grinding member. In this way, by fixing the first fixing surface 11 or the second fixing surface 12 to the external processing platform, the trimming member 30 can be switched between different installation states to complete the trimming of the outer periphery and side wall of the external grinding member, without using too many trimming mechanisms for trimming operations, improving the trimming efficiency. In addition, by driving the trimming member 30 to slide relative to the base 10 through the sliding member 20, the trimming member 30 can be adjusted to the preset position, reducing the transfer distance of the grinding wheel between the workpiece and the trimming member 30, thereby shortening the operation time of the trimming process and further improving the trimming efficiency.

[0067] It can be understood that the base 10 is connected to the external processing platform by a magnetic attraction method, which is convenient for the trimming member 30 to perform state conversion and improves the trimming efficiency. Among them, the first fixing surface 11 and the second fixing surface 12 can be contact surfaces embedded with magnetic attraction members, and the external processing platform is a metal platform that can be magnetically attracted by the magnetic members. The first fixing surface 11 and the second fixing surface 12 can also be contact surfaces with metal members, and the external processing platform is a magnetic attraction platform that can magnetically attract metal members.

[0068] Please refer to Figure 3In some embodiments, the base 10 includes a base 13 and a guide body 14. The first fixing surface 11 and the second fixing surface 12 are provided on the base 13. The guide body 14 is provided on the base 13 at an angle relative to the extension direction of the first fixing surface 11 and the second fixing surface 12. The extension direction of the guide body 14 intersects with the extension direction of the first fixing surface 11 and the extension direction of the second fixing surface 12. The guide body 14 is slidably connected to the sliding member 20 and is used to guide the sliding member 20.

[0069] In this way, by setting the specific structure of the above-mentioned base 10, the guide body 14 can guide the movement direction of the sliding member 20, so that the sliding member 20 can be stably moved to the preset position under the guidance of the guide body 14, thereby improving the adjustment stability. In addition, the guide body 14 is tilted on the base 13, so that the guide body 14 can support the sliding member 20 in the horizontal and vertical directions at the same time, so that the trimming piece 30 connected to the sliding member 20 can maintain a stable working state when trimming the external polishing piece, thereby improving the trimming stability.

[0070] Please continue reading Figure 3 In some embodiments, the guide body 14 is provided with a sliding plane 141 and a supporting slope 142. The sliding plane 141 is provided on the side of the guide body 14 away from the base 13. The supporting slope 142 is provided on the side wall of the guide body 14 and connected to the sliding plane 141. The supporting slope 142 is inclined relative to the sliding plane 141.

[0071] The sliding member 200 includes a sliding body 21, a mounting body 22 and a locking body 23. The sliding body 21 is connected to the trimming member 30 and is provided with an opening 211, which is provided on the side of the sliding body 21 facing the guide body 14. The mounting body 22 is provided on one side of the sliding body 21 and is detachably connected to the sliding body 21. The mounting body 22 covers the opening 211 to enclose and form a guide groove 212. The guide groove 212 has a bottom wall 2121 and a supporting matching surface 2122 connected to the bottom wall 2121. The bottom wall 2121 corresponds to the sliding plane 141. The bottom wall 2121 is used to abut against the sliding plane 141 when the sliding body 21 slides. The supporting matching surface 2122 is provided toward the supporting inclined surface 142. The locking body 23 is movably arranged in the direction perpendicular to the extension direction of the sliding plane 141 and is threadedly connected to the sliding body 21. The locking body 23 is used to move in the direction close to the sliding plane 141 under the action of external force, so as to push the sliding body 21 to abut against the abutting inclined surface 142 through the abutting matching surface 2122, so as to lock the sliding body 21 to the base 10. Exemplarily, the locking body 23 can be a screw or a bolt.

[0072] When the sliding body 21 drives the trimming member 30 to adjust the position, the locking body 23 moves away from the sliding plane 141 under the action of an external force, so that the abutting and adapting surface 2122 and the abutting inclined surface 142 are disengaged from each other, and the bottom wall 2121 abuts against the sliding plane 141, facilitating the position adjustment of the sliding body 21; when the sliding body 21 drives the trimming member 30 to complete the position adjustment, the locking body 23 moves close to the sliding plane 141 under the action of an external force, so that the bottom wall 2121 and the sliding plane 141 are disengaged from each other, and the abutting and adapting surface 2122 and the abutting inclined surface 142 abut against each other, to lock the sliding body 21 to the base 10, preventing the trimming member 30 from shaking when trimming the external grinding member, thereby ensuring the trimming stability. In addition, by providing the sliding body 21 and the mounting body 22 to be detachably connected, the sliding body 21 and the mounting body 22 form a split structure, simplifying the mechanical structure and facilitating the assembly of the sliding member 20 to the guiding body 14.

[0073] Please refer to Figure 1 and Figure 3 , in some embodiments, the trimming device 100 further includes a trial cutting member 40, and the trial cutting member 40 and the trimming member 30 are arranged on the sliding body 21 at intervals and are detachably connected to the sliding body 21. Wherein, the trimmed external grinding member cuts the trial cutting member 40, and based on the cutting state of the trial cutting member 40, the trimming state of the external grinding member is determined.

[0074] After the trimming member 30 finishes trimming the external grinding member, the trimmed external grinding member cuts the trial cutting member 40 to form a cutting groove on the trial cutting member 40. By an operator or a detection device, the cutting groove cut out on the trial cutting member 40 is detected to obtain the cutting state of the trial cutting member 40. The cutting state includes whether there are burrs on the groove surface of the detected cutting groove, whether the groove size of the cutting groove meets the standard, etc. Then, the operator determines the trimming state of the external grinding member based on the cutting state of the trial cutting member 40, that is, whether the outer circumference and side wall of the external grinding member are trimmed to a preset standard. If the trimming state does not meet the preset standard, the trimming member 30 is continued to be used to trim the external grinding member. If the trimming state meets the preset standard, the use of the trimming member 30 to trim the external grinding member is stopped. Thus, based on the cutting state of the trial cutting member 40, the trimming state of the external grinding member can be determined, which is beneficial to ensuring that the trimming member 30 stably trims the external grinding member to the preset standard.

[0075] Please refer to Figure 3 , in some embodiments, the sliding body 21 is provided with an operating surface 213, a storage groove 214 and a receiving groove 215. The operating surface 213 is parallel to the first fixing surface 11 and perpendicular to the second fixing surface 12. The storage groove 214 and the receiving groove 215 are arranged on the operating surface 213 at intervals. The storage groove 214 and the receiving groove 215 are respectively used to accommodate part of the trimming member 30 and part of the trial cutting member 40 to respectively position the trimming member 30 and the trial cutting member 40.

[0076] In this way, by arranging the storage groove 214 and the accommodation groove 215 on the working surface 213 to accommodate part of the trimming member 30 and part of the trial cutting member 40 respectively, the storage groove 214 and the accommodation groove 215 can position the trimming member 30 and the trial cutting member 40 to predetermined positions respectively, and is beneficial to the rational layout of the trimming member 30 and the trial cutting member 40.

[0077] In some embodiments, the trial cutting member 40 includes a trial cutting body 41 and a connecting body 42. One end of the trial cutting body 41 penetrates into the accommodation groove 215, and the other end of the trial cutting body 41 extends out of the accommodation groove 215. The connecting body 42 penetrates into the accommodation groove 215 and passes through the trial cutting body 41 in the vertical direction of the direction from the first fixing surface 11 to the working surface 213, and the connecting body 42 is threadedly connected to the sliding body 21 so that the trial cutting body 41 is detachably connected to the sliding body 21. Exemplarily, the material of the trial cutting member 40 can be metal, plastic, etc., and the connecting body 42 can be a screw, a bolt, etc.

[0078] In this way, by setting the specific structure of the trial cutting member 40 as described above, the trial cutting body 41 can be detachably connected to the sliding body 21, which is convenient for the operator to replace the cut trial cutting member 40 in time, so as to provide the trial cutting member 40 to be cut, and is beneficial to the detection of the trimming state of the external grinding member after trimming.

[0079] In some embodiments, the accommodation groove 215 and the trial cutting body 41 are in clearance fit in the vertical direction of the direction from the first fixing surface 11 to the working surface 213.

[0080] In this way, by setting the accommodation groove 215 and the trial cutting body 41 in clearance fit, it is convenient for the operator to place the replaced trial cutting body 41 into the accommodation groove 215, and avoid interference between the accommodation groove 215 and the trial cutting body 41 resulting in damage to the trial cutting body 41 or the sliding body 21. In addition, the two groove walls of the accommodation groove 215 arranged in the vertical direction of the direction from the first fixing surface 11 to the working surface 213 limit the trial cutting body 41 to prevent the trial cutting body 41 from deviating too far, and are convenient for the connecting body 42 to stably fix the trial cutting body 41 into the accommodation groove 215.

[0081] In some embodiments, the trimming member 30 includes a trimming body 31 and a fixing body 32. One end of the trimming member 30 penetrates into the storage groove 214, and the other end of the trimming member 30 is used for trimming the external grinding member. The fixing body 32 penetrates into the storage groove 214 and passes through the trimming member 30 in the vertical direction of the extending direction of the trimming member 30, and the fixing body 32 is threadedly connected to the sliding body 21 so that the trimming member 30 is detachably connected to the sliding body 21. Exemplarily, the fixing body 32 can be a screw.

[0082] Thus, by setting the specific structure of the trimming member 30 as described above, the trimming member 30 can be detachably connected to the sliding body 21, facilitating the timely replacement of the damaged or different types of trimming bodies 31, avoiding the replacement of the overall structure of the trimming member 30, and reducing the use cost.

[0083] In some embodiments, the sliding body 21 is provided with an avoidance groove 216 on the working surface 213, and the avoidance groove 216 is used for avoiding the locking body 23.

[0084] Thus, by setting the above-mentioned avoidance groove 216, a sufficiently large working space can be provided for the operator and the locking body 23, facilitating the operator to use the locking tool to drive the locking body 23 to move closer to or away from the sliding plane 141.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A dressing device, characterized in that: include: A base having a first fixing surface and a second fixing surface which are perpendicular to each other; A sliding member, slidably connected to the base; A trimming piece connected to the sliding piece, the trimming piece is adjusted to a preset position under the drive of the sliding piece and is used to trim the external grinding piece; Wherein, when the first fixed surface is fixed to the external processing platform, the trimming piece abuts against the outer periphery of the external polishing piece to trim the outer periphery of the external polishing piece, and when the second fixed surface is fixed to the external processing platform, the trimming piece abuts against the side wall of the external polishing piece to trim the side wall of the external polishing piece.

2. The trimming device according to claim 1, characterized in that: The base comprises: A base, wherein the first fixing surface and the second fixing surface are arranged on the base; The guide body is obliquely arranged on the base relative to the extension direction of the first fixed surface and the second fixed surface, the extension direction of the guide body intersects with the extension direction of the first fixed surface and the extension direction of the second fixed surface, and the guide body is slidably connected to the sliding member for guiding the sliding member.

3. The trimming device according to claim 2, characterized in that: The guide body is provided with a sliding plane and a supporting slope. The sliding plane is arranged on a side of the guide body away from the base. The supporting slope is arranged on a side wall of the guide body and connected to the sliding plane. The supporting slope is inclined relative to the sliding plane.

4. The trimming device according to claim 3, characterized in that: The sliding member comprises: A sliding body connected to the trimming member and provided with an opening, wherein the opening is provided on a side of the sliding body facing the guide body; A mounting body is disposed on one side of the sliding body and is detachably connected to the sliding body. The mounting body cover is disposed on the opening to surround and form a guide groove. The guide groove has a bottom wall and a supporting matching surface connected to the bottom wall. The bottom wall corresponds to the sliding plane. The bottom wall is used to abut against the sliding plane when the sliding body slides. The supporting matching surface is arranged toward the supporting inclined surface; and A locking body is movably arranged on the sliding body in a direction perpendicular to the extension direction of the sliding plane and is threadedly connected to the sliding body. The locking body is used to move in a direction close to the sliding plane under the action of an external force to push the sliding body to abut against the abutting inclined surface through the abutting adapter surface to lock the sliding body to the base.

5. The trimming device according to claim 4, characterized in that: The trimming device also includes: A trial cutting piece, which is spaced apart from the trimming piece and arranged on the sliding body and is detachably connected to the sliding body; The trimmed external grinding piece cuts the trial-cut piece, and the trimming state of the external grinding piece is determined based on the cutting state of the trial-cut piece.

6. The trimming device according to claim 5, characterized in that: The sliding body is provided with a working surface, a receiving groove and a containing groove. The working surface is parallel to the first fixed surface and perpendicular to the second fixed surface. The receiving groove and the containing groove are arranged at intervals on the working surface. The receiving groove and the containing groove are respectively used to accommodate part of the trimming piece and part of the trial cutting piece to respectively position the trimming piece and the trial cutting piece.

7. The trimming device according to claim 6, characterized in that The test cut pieces include: A test cutting body, one end of which penetrates into the receiving groove and the other end of which extends out of the receiving groove; A connecting body is inserted into the receiving groove and passes through the trial cutting body along a direction perpendicular to the direction in which the first fixing surface points to the working surface. The connecting body is threadedly connected to the sliding body so that the trial cutting body can be detachably connected to the sliding body.

8. The trimming device according to claim 7, characterized in that: The accommodating groove and the trial-cut body are clearance-matched in a vertical direction along a direction from the first fixing surface to the working surface.

9. The trimming device according to claim 6, characterized in that: The trimming piece comprises: A trimming unit, wherein one end of the trimming unit is inserted into the receiving groove, and the other end of the trimming unit is used to trim the external polishing unit; A fixed body is inserted into the receiving groove and passes through the trimming piece in a direction perpendicular to the extending direction of the trimming piece, and the fixed body is threadedly connected with the sliding body so that the trimming piece can be detachably connected with the sliding body.

10. The trimming device according to claim 6, characterized in that: The sliding body is provided with an avoidance groove, the avoidance groove is arranged on the working surface, and the avoidance groove is used for avoiding the locking body.

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