Grinding equipment and cutting and grinding machine using same

Abstract

The utility model relates to the field of crystal bar machining, in particular to grinding equipment and a cutting and grinding machine using the same, the grinding equipment comprises a portal frame and at least two sets of grinding wheels symmetrically arranged on the two sides of the portal frame, and each grinding wheel comprises a chamfer grinding assembly and a plane grinding assembly. The chamfering grinding assemblies and the plane grinding assemblies are arranged on the front side and the rear side of the portal frame respectively, and each set of grinding wheel at least comprises two chamfering grinding assemblies and a cutting and grinding machine provided with the grinding equipment. Through the arrangement of the grinding equipment and the cutting and grinding machine, the compact arrangement of the equipment can be realized, and the occupied volume is reduced.

Description

Technical Field

[0001] The utility model relates to the field of ingot processing, in particular to a grinding device and a cutoff grinding machine using the device. Background Art

[0002] In the existing ingot processing, after the ingot is cut into half ingots by a cutting mechanism, grinding operation is required. Conventional grinding operation needs to place the half ingot flat on the grinding platform, and multiple groups of grinding wheels are used to grind the cutting surface and its corner structure of the half ingot respectively.

[0003] In the design of existing grinding devices, taking the Chinese invention patent with the application number CN202311277474.6 as an example, the disclosed cutting and grinding integrated machine has 2 processing paths symmetrically arranged on both sides of the grinding device. The grinding device includes a chamfer grinding component and a plane grinding component. Among them, 2 groups of plane grinding components are jointly arranged on the left and right of the column and span the entire width direction of the device to form a T-shaped arrangement. This actual product has high requirements for the strength of the overall chassis of the device and the column of the plane grinding component; in addition, in the literature, the grinding wheels of the grinding components with different functions are respectively arranged at intervals on the processing path of the grinding platform for sequential processing. The grinding wheels arranged in the above way increase the space occupation of the overall machine platform, making the design of the grinding device not compact enough, and also increasing the displacement length and processing time of the grinding operation; the grinding device designed in the above way also leads to an increase in the number of internal structures of the whole machine, and it is not convenient to maintain due to the complex layout of the internal mechanisms of the whole machine during the maintenance of the whole machine. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a grinding device and a cutoff grinding machine using the device that can achieve compact layout, reduce the number of structures and space occupation.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a grinding device, including a gantry and at least 2 sets of grinding wheels symmetrically arranged on both sides of the gantry. The grinding wheels include a chamfer grinding component and a plane grinding component. The chamfer grinding component and the plane grinding component are respectively arranged on the front and rear sides of the gantry, and each set of the grinding wheels includes at least two groups of chamfer grinding components.

[0006] Further, the lower part of the gantry is used as the processing position for ingot grinding; on the gantry, first slide rails and second slide rails are respectively arranged at the installation positions of the chamfer grinding component and the plane grinding component, and both the first slide rails and the second slide rails extend towards the processing position for ingot grinding; the chamfer grinding component and the plane grinding component are respectively movably connected to the first slide rails and the second slide rails.

[0007] Further, the gantry includes a cross beam and vertical beams perpendicular to the cross beam on both sides of the cross beam; two chamfer grinding assemblies of a set of the grinding wheels are respectively arranged on the cross beam and the vertical beams.

[0008] Further, in the thickness direction of the gantry, the projections of the axes of the surface grinding assemblies of two sets of the grinding wheels that are symmetrically arranged are not perpendicular to the front end face of the gantry.

[0009] A cutting grinder includes the above-mentioned grinding equipment and a grinding platform. The grinding platform is movable in the thickness direction of the gantry. Inclined grinding surfaces are provided on the left and right sides of the gantry corresponding to the grinding platform. A crystal bar to be processed is placed on the grinding surface. The grinding surface is parallel to the cutting surface of the crystal bar to be processed. The surface grinding assembly faces the cutting surface of the crystal bar, and the chamfer grinding assembly faces the two side corner structures of the cutting surface of the crystal bar.

[0010] Further, it further includes a calibration assembly. The calibration assembly includes a tool setting device. The tool setting device includes a tool setting fixed seat, a chamfer tool setting instrument, and a surface tool setting instrument. The tool setting fixed seat is arranged on the grinding platform. The chamfer tool setting instrument and the surface tool setting instrument are both arranged on the tool setting fixed seat and face the chamfer grinding assembly and the surface grinding assembly respectively.

[0011] Further, it further includes an oilstone assembly. The oilstone assembly includes a chamfer grinding oilstone and a surface grinding oilstone. The chamfer grinding oilstone and the surface grinding oilstone are respectively arranged on the parts of the grinding platform that face the chamfer grinding assembly and the surface grinding assembly.

[0012] Further, the surface grinding oilstone is rotatably arranged on the grinding platform.

[0013] Further, it further includes a calibration assembly. The calibration assembly includes a calibration block. The surface grinding assembly includes a calibration sensor and a first driving device. The calibration sensor faces the calibration block; the first driving device drives the calibration sensor to move towards the calibration block.

[0014] Further, it further includes a protection assembly. The protection assembly includes a protective cover and a second driving device. The protective cover is rotatably arranged on the grinding platform. The protective cover covers the calibration assembly; the transmission end of the second driving device is connected to the protective cover.

[0015] The beneficial effects of the present utility model are as follows: In the design of the existing split and spaced surface grinding assembly and chamfer grinding assembly, the T-shaped surface grinding assembly needs to span two processing paths, and its middle part requires a column with sufficient strength for support. At the same time, the chamfer grinding assembly also needs an independent column for support. However, by adopting the combined design of an integrated gantry with the surface grinding assembly and the chamfer grinding assembly, a single gantry can be used as the support structure for both the surface grinding assembly and the chamfer grinding assembly, avoiding the increase in the equipment width caused by arranging support columns on two processing paths. Under this design, the equipment structure can reduce the number of support structure designs, making the overall structure more compact and facilitating subsequent maintenance operations. Description of the Drawings

[0016] Figure 1 Schematic diagram of the structure of the cutoff grinder in the specific embodiment of the present utility model;

[0017] Figure 2 Schematic diagram of the structure of the grinding platform of the cutoff grinder in the specific embodiment of the present utility model;

[0018] Figure 3 Schematic diagram of the structure of the grinding equipment in the specific embodiment of the present utility model;

[0019] Figure 4 Schematic diagram when the arrangement of the chamfer grinding assembly of the grinding equipment in the specific embodiment of the present utility model and the axis of the corresponding surface grinding assembly are perpendicular;

[0020] Figure 5 Schematic diagram of the structure when the arrangement of the chamfer grinding assembly of the grinding equipment in the specific embodiment of the present utility model and the axis of the corresponding surface grinding assembly are parallel;

[0021] Figure 6 Schematic diagram of the structure when the arrangement of the chamfer grinding assembly of the grinding equipment in the specific embodiment of the present utility model and the axis of the corresponding surface grinding assembly are not perpendicular.

[0022] Label Description:

[0023] 1. Gantry; 11. Cross frame; 12. Vertical frame; 2. Grinding wheel; 21. Chamfer grinding assembly; 22. Surface grinding assembly;

[0024] 3. Calibration assembly; 31. Tool setting device; 311. Tool setting fixed seat; 312. Chamfer tool setting instrument; 313. Surface tool setting instrument; 32. Alignment block;

[0025] 4. Oilstone assembly; 41. Chamfer grinding oilstone; 42. Surface grinding oilstone; 5. Grinding platform. Specific Embodiment

[0026] To describe the technical content, achieved objectives and effects of the present utility model in detail, the following is described in conjunction with the embodiments and with reference to the drawings.

[0027] Please refer to Figures 1 to 6 , a grinding device, comprising a gantry 1 and at least two sets of grinding wheels 2 symmetrically arranged on both sides of the gantry 1. The grinding wheel 2 comprises a chamfer grinding assembly 21 and a surface grinding assembly 22. The chamfer grinding assembly 21 and the surface grinding assembly 22 are respectively arranged on the front and rear sides of the gantry 1. Each set of the grinding wheels 2 comprises at least two groups of chamfer grinding assemblies 21; in the thickness direction of the gantry 1, the angular bisector of the virtual angle formed by the virtual extension lines in the length direction of the projections of the two groups of chamfer grinding assemblies 21 of the two symmetrically arranged grinding wheels 2 on the front end face of the gantry 1 is not perpendicular.

[0028] From the above description, the beneficial effects of the present utility model are as follows: for the existing design of the split and spaced surface grinding assembly 22 and chamfer grinding assembly 21, the T-shaped surface grinding assembly 22 needs to straddle two processing paths, and its middle part requires a column with sufficient strength for support. At the same time, the chamfer grinding assembly 21 also requires an independent column for support. However, by adopting the combined design of the integrated gantry 1 with the surface grinding assembly 22 and the chamfer grinding assembly 21, the single gantry 1 can be used as the support structure for both the surface grinding assembly 22 and the chamfer grinding assembly 21 at the same time, avoiding the increase in the width of the device due to the arrangement of support columns on the two processing paths. Under this design, the device structure can reduce the number of support structure designs, making the overall structure more compact and facilitating subsequent maintenance operations; in addition, for the design of the coordination relationship of the angular bisectors corresponding to the two groups of chamfer grinding assemblies 21 on both sides of the gantry 1, the arrangement of the chamfer grinding assemblies 21 corresponding to the non-perpendicular angular bisectors can be arranged in an inclined state, breaking away from the limitations of the traditional horizontal and vertical direction movements, increasing the movable directions, reducing the space occupation in the width and height directions of the device, and making room for the arrangement of other mechanisms to achieve a compact layout of the overall mechanism.

[0029] Further, the lower part of the gantry 1 serves as the processing position for crystal bar grinding; first sliding rails and second sliding rails are respectively arranged on the gantry 1 at the installation positions of the chamfer grinding assembly 21 and the surface grinding assembly 22, and both the first sliding rails and the second sliding rails extend towards the processing position for crystal bar grinding; the chamfer grinding assembly 21 and the surface grinding assembly 22 are respectively movably connected to the first sliding rails and the second sliding rails.

[0030] From the above description, through the design of the first sliding rails and the second sliding rails for the chamfer grinding assembly 21 and the surface grinding assembly 22, the processing actions of the chamfer grinding assembly 21 and the surface grinding assembly 22 moving are realized. When it is necessary to grind the crystal bar below the gantry 1, the chamfer grinding assembly 21 and the surface grinding assembly 22 approach for grinding operations.

[0031] Further, the gantry 1 includes a cross frame 11 and vertical frames 12 perpendicular to the cross frame 11 on both sides of the cross frame 11; two chamfer grinding assemblies 21 of a set of the grinding wheels 2 are respectively arranged on the cross frame 11 and the vertical frames 12.

[0032] As can be seen from the above description, through the two chamfer grinding assemblies 21 respectively arranged on the cross frame 11 and the vertical frames 12 of the gantry 1, the structural load of the gantry 1 is reasonably distributed, and at the same time, sufficient space is provided for the processing of the two chamfer grinding assemblies 21, ensuring the reliable operation of the two chamfer grinding assemblies 21 without interference.

[0033] Further, in the thickness direction of the gantry 1, the axes of the two plane grinding assemblies 22 of the symmetrically arranged grinding wheels 2 are not perpendicular to the projection on the front end face of the gantry 1.

[0034] As can be seen from the above description, for the design of the cooperation relationship of the axes of the plane grinding assemblies 22 on both sides of the gantry 1, the arrangement of the chamfer grinding assemblies 21 and the plane grinding assemblies 22 corresponding to the non-perpendicular axes of the plane grinding assemblies 22 can be arranged in an inclined state, which can break away from the limitations of the traditional horizontal and vertical direction movements, increase the movable directions, reduce the space occupation in the width and height directions of the equipment, and provide space for the arrangement of other mechanisms, realizing the compact arrangement of the overall mechanism.

[0035] A cutting grinder includes the above-mentioned grinding equipment and a grinding platform 5. The grinding platform 5 is movable in the thickness direction of the gantry 1. Inclined grinding surfaces are provided on the left and right sides of the grinding platform 5 corresponding to the gantry 1. A crystal bar to be processed is placed on the grinding surface. The grinding surface is parallel to the cutting surface of the crystal bar to be processed. The plane grinding assembly 22 faces the cutting surface of the crystal bar, and the chamfer grinding assembly 21 faces the two side corner structures of the cutting surface of the crystal bar.

[0036] As can be seen from the above description, through the design of the inclined grinding surface on the grinding platform 5, compared with the existing horizontal surface, it can utilize the space in the height direction of the equipment and reduce the overall width of the equipment; combined with the design of the chamfer grinding assembly 21 with a specific angular bisector cooperation relationship as described above, the structural distribution of the equipment can be further improved, realizing a more compact structural arrangement.

[0037] Further, it further includes a calibration assembly 3. The calibration assembly 3 includes a tool setting device 31. The tool setting device 31 includes a tool setting fixed seat 311, a chamfer tool setting instrument 312 and a plane tool setting instrument 313. The tool setting fixed seat 311 is arranged on the grinding platform 5. The chamfer tool setting instrument 312 and the plane tool setting instrument 313 are both arranged on the tool setting fixed seat 311 and face the chamfer grinding assembly 21 and the plane grinding assembly 22 respectively.

[0038] It can be seen from the above description that, through the design of the chamfer tool setter 312 and the plane tool setter 313 of the tool setting device 31, tool setting operations can be performed for the chamfer grinding assembly 21 and the plane grinding assembly 22, and the wear amount of the above grinding assemblies can be determined to control the subsequent processing feed amount; the arrangement of the chamfer tool setter 312 and the plane tool setter 313 on the tool setting fixing seat 311 realizes a compact arrangement.

[0039] Furthermore, it also includes an oilstone assembly 4, which includes a chamfering oilstone 41 and a surface grinding oilstone 42. The chamfering oilstone 41 and the surface grinding oilstone 42 are respectively arranged on the grinding platform 5 at the parts opposite to the chamfering grinding assembly 21 and the surface grinding assembly 22.

[0040] It can be seen from the above description that the chamfering grinding assembly 21 and the surface grinding assembly 22 are ground by the chamfering grinding oil stone 41 and the surface grinding oil stone 42 respectively, which ensures the processing accuracy.

[0041] Furthermore, the surface grinding stone 42 is rotatably disposed on the grinding platform 5 .

[0042] From the above description, it can be known that, through the rotatable design of the surface grinding oilstone 42, it can rotate in the opposite direction to the rotation of the surface grinding wheel of the surface grinding assembly 22, thereby speeding up the grinding of the surface grinding wheel and improving the working efficiency.

[0043] Furthermore, it also includes a calibration component 3, which includes a calibration block 32. The surface grinding component 22 includes a calibration sensor and a first driving device. The calibration sensor is opposite to the calibration block 32. The first driving device drives the calibration sensor to move toward the calibration block 32.

[0044] From the above description, it can be known that the position of the surface grinding wheel of the surface grinding assembly 22 is aligned and zeroed by the alignment block 32, and the zeroing position of the surface grinding wheel is determined by the alignment sensor and the alignment block 32. Then, through the movement and coordination of the grinding platform 5, the alignment sensor performs position detection on multiple points on the cutting surface of the crystal rod to determine the subsequent processing and grinding amount.

[0045] Furthermore, it also includes a protection component, which includes a protection cover and a second drive device. The protection cover is rotatably arranged on the grinding platform 5, and the protection cover covers the calibration component 3; the transmission end of the second drive device is connected to the protection cover.

[0046] As described above, by covering the calibration component 3 with the protective cover of the protective component, it is possible to prevent waste or other foreign objects from adhering to the calibration component 3 during the processing, resulting in errors in the processing calibration of the chamfer grinding component 21 and the surface grinding component 22; through the design of the transmission end of the second driving device and the rotatable protective cover, the protective cover can be opened during the processing calibration of the chamfer grinding component 21 and the surface grinding component 22, and closed at other times to shield and protect the calibration component 3.

[0047] Embodiment 1:

[0048] As Figures 1 to 6 shown, the grinding equipment of this embodiment includes a gantry 1 and at least two sets of grinding wheels 2 symmetrically arranged on both sides of the gantry 1. In this embodiment, there are two sets of grinding wheels 2; the grinding wheel 2 includes a chamfer grinding component 21 and a surface grinding component 22. The chamfer grinding component 21 and the surface grinding component 22 are respectively arranged on the front and rear sides of the gantry 1. Each set of the grinding wheel 2 includes at least two groups of chamfer grinding components 21. In this embodiment, each set of the grinding wheel 2 includes two groups of chamfer grinding components 21.

[0049] A flushing component is provided on the gantry 1. During the grinding process, the waste remaining on the ingot and the grinding wheel 2 can be cleaned by the flushing of the flushing component, and the grinding wheel 2 can be cooled and dissipated heat; the lower part of the gantry 1 serves as the processing position for ingot grinding; first sliding rails and second sliding rails are respectively provided on the gantry 1 at the installation positions of the chamfer grinding component 21 and the surface grinding component 22, and both the first sliding rail and the second sliding rail extend towards the processing position of ingot grinding; the chamfer grinding component 21 and the surface grinding component 22 are respectively movably connected to the first sliding rail and the second sliding rail.

[0050] Regarding the arrangement of the two groups of chamfer grinding components 21 of each set of the grinding wheel 2, the gantry 1 includes a cross frame 11 and vertical frames 12 perpendicular to the cross frame 11 on both sides of the cross frame 11; the two groups of chamfer grinding components 21 of a set of the grinding wheel 2 are respectively arranged on the cross frame 11 and the vertical frame 12.

[0051] By comparing with Figure 4 and 5 6, and Figure 4 and 5 6 respectively correspond to two situations where the projections of the axes of the surface grinding components 22 of two sets of the grinding wheels 2 symmetrically arranged in the thickness direction of the gantry 1 on the front end face of the gantry 1 are perpendicular and non-perpendicular (the angular bisector of the included angle formed by the extension lines of the axes of the two groups of chamfer grinding components 21 in the figure is the axis of the corresponding surface grinding component 22). It can be seen that in Figure 5 and 6In the case where the axes are not perpendicular, the arrangement of the chamfer grinding assembly 21 can be inclined in a non-horizontal or vertical direction; preferably, the design of the grinding equipment in the case where the arrangement of the chamfer grinding assembly 21 as shown in Figure 5 and the axes of the corresponding surface grinding assembly 22 are parallel can reduce the dimensions of the equipment in the width and height directions, provide space for the arrangement of other mechanisms, and make the whole more compact.

[0052] Embodiment 2:

[0053] As shown in Figures 1 to 3 , the cut-off grinding machine of this embodiment includes the grinding equipment, grinding platform 5, calibration assembly 3, oilstone assembly 4 and protective assembly of the above Embodiment 1.

[0054] The grinding platform 5 is movable along the thickness direction of the gantry 1. Inclined grinding surfaces are provided on the left and right sides of the gantry 1 corresponding to the grinding platform 5. A crystal bar to be processed is placed on the grinding surface. The grinding surface is parallel to the cutting surface of the crystal bar to be processed. The surface grinding assembly 22 faces the cutting surface of the crystal bar, and the chamfer grinding assembly 21 faces the corner structures on both sides of the cutting surface of the crystal bar.

[0055] The calibration assembly 3 includes a tool setting device 31 and a calibration block 32. The tool setting device 31 includes a tool setting fixed seat 311, a chamfer tool setting instrument 312 and a surface tool setting instrument 313. The tool setting fixed seat 311 is arranged on the grinding platform 5. The chamfer tool setting instrument 312 and the surface tool setting instrument 313 are both arranged on the tool setting fixed seat 311 and face the chamfer grinding assembly 21 and the surface grinding assembly 22 respectively. The surface grinding assembly 22 includes a calibration sensor and a first driving device. The calibration sensor faces the calibration block 32. The first driving device drives the calibration sensor to move towards the calibration block 32.

[0056] In this embodiment, the tool setting device 31 and the calibration block 32 are arranged in the same area of the grinding platform 5.

[0057] The protective assembly includes a protective cover and a second driving device. The protective cover is rotatably arranged on the grinding platform 5 and covers the calibration assembly 3. The transmission end of the second driving device is connected to the protective cover. Through the arrangement of the protective assembly and the arrangement of the tool setting device 31 and the calibration block 32, the protective cover can uniformly protect and block the tool setting device 31 and the calibration block 32, and prevent waste or foreign objects from adhering to the calibration assembly 3.

[0058] In addition, the cutting and grinding machine further includes a feeding component, a discharging component, a cutting component, and a transfer component. The ingot is sequentially transferred by the transfer component onto the feeding component, the cutting component, the grinding platform 5, and the discharging component, and is respectively subjected to cutting operations by the cutting component. Through the cooperation of the grinding platform 5 and the grinding equipment, the cutting surface of the ingot and the edges and corners on both sides of the cutting surface are ground.

[0059] In summary, for the grinding equipment provided by the present utility model and the cutting and grinding machine using this equipment, in the design of the existing split and spaced flat grinding component and chamfer grinding component, the T-shaped flat grinding component needs to span two processing paths, and its middle part requires a column with sufficient strength for support. At the same time, the chamfer grinding component also needs an independent column for support. However, with the combined design of the integrated gantry and the flat grinding component and the chamfer grinding component, a single gantry can be used as the support structure for both the flat grinding component and the chamfer grinding component simultaneously, avoiding the increase in the equipment width caused by arranging support columns on two processing paths. Under this design, the equipment structure can reduce the number of support structure designs, making the overall structure more compact and facilitating subsequent maintenance operations; through the design of the inclined grinding table on the grinding platform, compared with the existing horizontal table, it can utilize the space in the height direction of the equipment and reduce the overall width of the equipment; combined with the design of the chamfer grinding component with the specific angular bisector cooperation relationship described above, it can further improve the equipment structure distribution and achieve a more compact structure layout.

[0060] The above description is only an embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A grinding device, characterized in that, It includes a gantry and at least two sets of grinding wheels symmetrically arranged on both sides of the gantry. The grinding wheels include a chamfer grinding assembly and a surface grinding assembly. The chamfer grinding assembly and the surface grinding assembly are respectively arranged on the front and rear sides of the gantry. Each set of the grinding wheels includes at least two groups of chamfer grinding assemblies.

2. The grinding device according to claim 1, characterized in that, Below the gantry is the processing position for grinding the ingot. On the gantry, a first slide rail and a second slide rail are respectively arranged at the installation positions of the chamfer grinding assembly and the surface grinding assembly. Both the first slide rail and the second slide rail extend towards the processing position for grinding the ingot. The chamfer grinding assembly and the surface grinding assembly are respectively movably connected to the first slide rail and the second slide rail.

3. The grinding device according to claim 1, characterized in that, The gantry includes a cross frame and vertical frames perpendicular to the cross frame on both sides of the cross frame. Two groups of chamfer grinding assemblies of one set of the grinding wheels are respectively arranged on the cross frame and the vertical frame.

4. The grinding device according to claim 1, characterized in that In the thickness direction of the gantry, the projections of the axes of the surface grinding assemblies of two symmetrically arranged sets of the grinding wheels on the front end face of the gantry are not perpendicular.

5. A cutting mill, characterized in that, It includes the grinding equipment and the grinding platform according to any one of claims 1 to 4 above. The grinding platform is movable along the thickness direction of the gantry. On the grinding platform, inclined grinding surfaces are provided corresponding to the left and right sides of the gantry. The ingot to be processed is placed on the grinding surfaces. The grinding surfaces are parallel to the cutting surface of the ingot to be processed. The surface grinding assembly faces the cutting surface of the ingot, and the chamfer grinding assembly faces the two side corner structures of the cutting surface of the ingot.

6. The cut-off grinder according to claim 5, characterized in that, It further includes a calibration assembly. The calibration assembly includes a tool setting device. The tool setting device includes a tool setting fixed seat, a chamfer tool setting instrument, and a surface tool setting instrument. The tool setting fixed seat is arranged on the grinding platform. The chamfer tool setting instrument and the surface tool setting instrument are both arranged on the tool setting fixed seat and are respectively opposite to the chamfer grinding assembly and the surface grinding assembly.

7. The cut-off grinding machine according to claim 5, characterized in that, It further includes an oilstone assembly. The oilstone assembly includes a chamfer grinding oilstone and a surface grinding oilstone. The chamfer grinding oilstone and the surface grinding oilstone are respectively arranged on the part of the grinding platform opposite to the chamfer grinding assembly and the surface grinding assembly.

8. The cut-off grinding machine according to claim 7, characterized in that The surface grinding oilstone is rotatably arranged on the grinding platform.

9. The cut-off grinder according to claim 5, characterized in that, It further includes a calibration assembly. The calibration assembly includes a calibration block. The surface grinding assembly includes a calibration sensor and a first driving device. The calibration sensor is opposite to the calibration block. The first driving device drives the calibration sensor to move towards the calibration block.

10. The cutoff mill according to claim 6 or 9, characterized in that, It further includes a protection assembly. The protection assembly includes a protective cover and a second driving device. The protective cover is rotatably arranged on the grinding platform. The protective cover covers the calibration assembly. The transmission end of the second driving device is connected to the protective cover.

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