Slitting device capable of achieving retention and self-polishing

Abstract

The utility model relates to the technical field of slitting devices, in particular to a retention and self-polishing slitting device which comprises a conveying support, a conveying roller is arranged at one end in the conveying support, the two ends of the conveying roller are rotationally connected with the conveying support respectively, and the peripheral wall of the upper end of the conveying roller is in friction contact with a strip. A fixing assembly is arranged on the upper side of the conveying roller, an extrusion roller is arranged on the fixing assembly, a slitting roller is arranged at the other end of the interior of the conveying support, a plurality of cutters are connected to the peripheral wall of the slitting roller in a sleeving mode, a first grinding assembly is arranged at the upper end of one side of the slitting roller, and a grinding roller is arranged on the first grinding assembly. And the peripheral walls of the polishing rollers are in frictional contact with the peripheral walls of the cutters. According to the utility model, the position of the strip can be accurately adjusted, the strip is effectively prevented from deviating in the splitting process, the splitting error is reduced, and the splitting yield is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of slitting devices, in particular to a slitting device which can be fixed and self-polished. Background Art

[0002] A slitter is a machine that is specifically used to cut continuous materials (such as cloth, plastic film, metal sheet, etc.) into strips. Usually, the raw materials are fed into the machine through an automatic feeding system, and the materials are precisely cut into strips of a specified width.

[0003] A search revealed a Chinese patent with publication number CN215516083U, which provides a slitting positioner and slitting machine. The invention provides an adjustable wide-band accommodating device to completely fix the wide band according to its width, and adjusts the workbench through a workbench displacement adjustment device, so that the slitting cutter can be accurately aligned with the slitting position. This allows for precise slitting of edgeless wires, while ensuring slitting accuracy and improving the utilization rate of the raw wide band.

[0004] However, during use, it was found that the movement and positioning operation of the wide band material to be cut was not convenient enough, and it was difficult to accurately move the wide band to the appropriate slitting position, which could easily lead to inaccurate slitting position, affecting product quality and production efficiency, and was not conducive to the continuous production and use of the slitter. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention provides a self-grinding and fixable slitter, which achieves precise adjustment of the strip position and effectively prevents the strip from deviating during the slitting movement.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a fixable and self-grinding slitter, comprising a conveying bracket, a conveying roller is provided at one end inside the conveying bracket, and both ends of the conveying roller are rotatably connected to the conveying bracket respectively, and the outer peripheral wall of the upper end of the conveying roller is in friction contact with the strip, a fixing component is provided on the upper side of the conveying roller, and an extrusion roller is provided on the fixing component, and a slitting roller is provided at the other end inside the conveying bracket, and a plurality of cutters are sleeved on the outer peripheral wall of the slitting roller, a first grinding component is provided at the upper end of one side of the slitting roller, a grinding roller is provided on the first grinding component, and the outer peripheral walls of the grinding roller are in friction contact with the outer peripheral walls of the cutters respectively, and a second grinding component is fixed to the top surface of one end of the conveying bracket, and a whetstone is provided on the second grinding component.

[0007] Preferably, one end of the central axis of the conveying roller and the output shaft of the slitting roller respectively pass through the conveying bracket and extend to the outside, and two driving motors are installed on the outer wall of the conveying bracket through a mounting seat, wherein the output shaft of one of the driving motors is coaxially connected to the central axis of the conveying roller, and the output shaft of the other driving motor is coaxially connected to the central axis of the slitting roller.

[0008] Through the above technical solution, the conveying roller and the slitting roller are driven to rotate by two driving motors respectively, and the multiple cutters on the outer peripheral wall of the slitting roller will cut the strip material.

[0009] Preferably, the retaining assembly includes a support block, the bottom surface of the support block is fixedly connected to the top surface of the conveying bracket, a through hole is opened on the support block, and the outer peripheral walls at both ends of the squeezing roller are slidably connected to the support block through the through holes.

[0010] Preferably, a connecting block is fixedly provided on the outer wall of the support block, a spring is fixedly provided on the bottom surface of the connecting block, a sleeve is fixedly provided on the bottom surface of the spring, and the outer peripheral walls at both ends of the squeezing roller are rotatably connected to the inner wall of the middle portion of the sleeve respectively.

[0011] Through the above technical solution, the squeezing roller is caused to slide along the support block through the through hole by the elastic force of the sleeve and the spring.

[0012] Preferably, a guide rod is provided on the lower side of the extrusion roller, and a bidirectional screw is provided on the lower side of the guide rod. A U-shaped block is slidably connected to the guide rod, and the U-shaped block is rotatably connected to the side close to the strip material. The inner wall of the U-shaped block is gap-fitted with the outer peripheral wall of the conveying roller, and the outer peripheral walls of the two roller shafts are in friction contact with the side walls of the strip material respectively.

[0013] Preferably, the U-shaped block is loosely fitted with the roller shaft, and the two U-shaped blocks are respectively threadedly connected to the bidirectional lead screw through threaded holes. A servo motor is installed at the rear end of the conveying bracket through a mounting seat, and the output shaft of the servo motor is coaxially connected to the bidirectional lead screw.

[0014] Through the above technical solution, the servo motor drives the bidirectional screw to rotate, and the rotation of the bidirectional screw pushes the two U-shaped blocks to move toward or away from each other along the guide rod. The movement of the U-shaped block drives the roller connected to its rotation to clamp or release the side wall of the strip.

[0015] Preferably, the first grinding assembly includes a vertical block, a through groove is provided on the vertical block, the bottom surface of the vertical block is fixedly connected to the top surface of the conveying bracket, the vertical blocks are symmetrically structured and two, the outer peripheral walls at both ends of the grinding roller are slidably connected to the vertical blocks through the through groove, and fixed blocks are clamped on the outer peripheral walls at both ends of the grinding roller, and the inner side walls of the fixed blocks are slidably connected to the outer side walls of the vertical blocks.

[0016] Preferably, a first connecting rod is fixedly connected between the two fixed blocks, and a second connecting rod is fixedly connected between the two vertical blocks. A first cylinder is installed on the first connecting rod through a front end mounting seat, and the piston rod of the first cylinder passes through the first connecting rod, and the bottom surface of the piston rod of the first cylinder is fixedly connected to the top surface of the second connecting rod.

[0017] Through the above technical solution, the outer peripheral wall of the cutter is conveniently polished by the polishing roller, and the piston rod of the first cylinder drives the polishing roller to rise and fall, thereby realizing automatic polishing of the cutter.

[0018] Preferably, the second polishing assembly includes a C-shaped block, a moving block is slidably connected to the C-shaped block, a pneumatic slide is installed on the upper end of the C-shaped block, a slider is slidably connected to the pneumatic slide, the bottom surface of the slider is fixedly connected to the top surface of the moving block, and a lifting block is slidably connected to the slider.

[0019] Preferably, the bottom surface of the lifting block is fixedly connected to the grindstone, the upper end of the lifting block is fixedly connected to a push block, a second cylinder is installed on the moving block through a mounting seat, the top surface of the piston rod of the second cylinder is fixedly connected to the bottom surface of the push block, and the side wall of the grindstone is in friction contact with the side wall of the cutter.

[0020] Through the above technical solution, after the lifting block drives the grindstone to move to a suitable grinding height, the grindstone and the side wall of the cutter are in friction contact, and the side wall of the grindstone is ground by the rotating cutter abutting against the grindstone.

[0021] Beneficial effects of the utility model:

[0022] 1. The servo motor drives the bidirectional lead screw to rotate. The rotation of the bidirectional lead screw pushes the two U-shaped blocks to move toward or away from each other along the guide rod. The movement of the U-shaped blocks drives the rollers connected to the U-shaped blocks to clamp or release the side walls of the strip, thereby achieving precise adjustment of the strip position, effectively preventing the strip from deviating during the slitting process, reducing slitting errors, and improving the slitting yield rate.

[0023] 2. The piston rod of the first cylinder moves under the reaction force of the second connecting rod, causing the first connecting rod to drive the fixed block to slide along the vertical block. The fixed block then drives the grinding roller to slide along the vertical block through the through slot, causing the outer circumference of the grinding roller to frictionally contact the outer circumference of the cutter. The rotation of the slitting roller drives the cutter to rotate and abut against the grinding roller for grinding. The grinding roller facilitates grinding the outer circumference of the cutter. The piston rod of the first cylinder drives the grinding roller to rise and fall, achieving automatic grinding of the cutter, ensuring that the cutter remains sharp and maintaining the consistency of slitting quality.

[0024] 3. The pneumatic slide drives the slider to move, causing it to move the moving block synchronously. The moving block then slides along the C-shaped block and drives the lifting block to move synchronously. After the lifting block drives the grindstone to the appropriate position, the piston rod of the second cylinder drives the lifting block to slide along the moving block through the push block. After the lifting block drives the grindstone to the appropriate grinding height, the grindstone and the side wall of the cutter come into frictional contact. The rotating cutter and the grindstone abut against the grindstone to grind the side wall of the grindstone, reducing burrs on the cutter caused by slitting, improving the quality of the slitting, and adapting to the grinding of cutters of different specifications and positions, extending the service life of the cutter, reducing the number of cutter replacements, and lowering production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a rear view of the overall structure of the utility model;

[0027] Figure 3 This is a schematic diagram of the U-shaped block structure of the utility model;

[0028] Figure 4 This is a schematic diagram of the casing structure of the present utility model;

[0029] Figure 5 This is a schematic structural diagram of the first grinding assembly of the present utility model;

[0030] Figure 6 This is a schematic structural diagram of the second grinding assembly of the present invention.

[0031] In the figure: 1. conveying bracket; 2. conveying roller; 3. belt; 4. retaining assembly; 401. extrusion roller; 402. support block; 403. through hole; 404. connecting block; 405. spring; 406. sleeve; 407. guide rod; 408. bidirectional screw; 409. U-shaped block; 410. roller; 411. servo motor; 5. slitting roller; 6. cutter; 7. first grinding assembly; 701. grinding roller; 702. vertical block; 703. through groove; 704. fixed block; 705. first connecting rod; 706. second connecting rod; 707. first cylinder; 8. second grinding assembly; 801. grindstone; 802. C-shaped block; 803. moving block; 804. pneumatic slide; 805. slider; 806. lifting block; 807. push block; 808. second cylinder; 9. drive motor. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0033] Example 1

[0034] like Figures 1-4 As shown, this embodiment provides a fixable and self-grinding slitter, including a conveying bracket 1, a conveying roller 2 is provided at one end inside the conveying bracket 1, and both ends of the conveying roller 2 are respectively rotatably connected to the conveying bracket 1, and the outer peripheral wall of the upper end of the conveying roller 2 is in friction contact with the material 3, a fixing component 4 is provided on the upper side of the conveying roller 2, and an extrusion roller 401 is provided on the fixing component 4, a slitting roller 5 is provided at the other end inside the conveying bracket 1, and a plurality of cutters 6 are sleeved on the outer peripheral wall of the slitting roller 5, a first grinding component 7 is provided at the upper end of one side of the slitting roller 5, and a grinding roller 701 is provided on the first grinding component 7, and the outer peripheral walls of the grinding roller 701 are respectively in friction contact with the outer peripheral walls of the cutter 6, a second grinding component 8 is fixed to the top surface of one end of the conveying bracket 1, and a whetstone 801 is provided on the second grinding component 8.

[0035] The center axis of the conveying roller 2 and one end of the output shaft of the slitting roller 5 respectively extend through the conveying bracket 1 to the outside. Two drive motors 9 are installed on the outer wall of the conveying bracket 1 through a mounting seat. The output shaft of one drive motor 9 is coaxially connected to the center axis of the conveying roller 2, and the output shaft of the other drive motor 9 is coaxially connected to the center axis of the slitting roller 5; the conveying roller 2 and the slitting roller 5 are driven to rotate by the two drive motors 9, and the multiple cutters 6 on the outer peripheral wall of the slitting roller 5 will cut the strip 3.

[0036] The retaining assembly 4 includes a support block 402, the bottom surface of the support block 402 is fixedly connected to the top surface of the conveying bracket 1, a through hole 403 is opened on the support block 402, and the outer peripheral walls at both ends of the squeezing roller 401 are slidingly connected to the support block 402 through the through holes 403 respectively. A connecting block 404 is fixedly provided on the outer wall of the support block 402, a spring 405 is fixedly provided on the bottom surface of the connecting block 404, and a sleeve 406 is fixedly provided on the bottom surface of the spring 405. The outer peripheral walls at both ends of the squeezing roller 401 are rotatably connected to the inner wall of the middle part of the sleeve 406 respectively; the squeezing roller 401 is subjected to the elastic force of the sleeve 406 and the spring 405, so that the squeezing roller 401 slides along the support block 402 through the through hole 403.

[0037] A guide rod 407 is provided on the lower side of the extrusion roller 401, and a bidirectional lead screw 408 is provided on the lower side of the guide rod 407. A U-shaped block 409 is slidably connected to the guide rod 407. The U-shaped block 409 is rotatably connected to the side of the strip 3 close to two roller shafts 410. The inner wall of the U-shaped block 409 is gap-matched with the outer peripheral wall of the conveying roller 2. The outer peripheral walls of the two roller shafts 410 are in friction contact with the side walls of the strip 3 respectively. The U-shaped block 409 is gap-matched with the roller shaft 410. The two U-shaped blocks 409 are respectively connected to the strip 3 through threaded holes. The bidirectional lead screw 408 is threadedly connected, and a servo motor 411 is installed at the rear end of the conveying bracket 1 through a mounting seat. The output shaft of the servo motor 411 is coaxially connected to the bidirectional lead screw 408; the servo motor 411 drives the bidirectional lead screw 408 to rotate, and the rotation of the bidirectional lead screw 408 drives the two U-shaped blocks 409 to move toward or away from each other along the guide rod 407. The movement of the U-shaped block 409 drives the roller shaft 410 connected to its rotation to clamp or release the side wall of the strip 3.

[0038] Working principle: First, the strip 3 to be slit is passed between the conveyor roller 2 and the squeezing roller 401. The conveyor roller 2 and the slitting roller 5 are driven to rotate by two driving motors 9 respectively. The rotation of the conveyor roller 2 drives the strip 3 in frictional contact with it to be conveyed. During the conveying process, the retaining component 4 plays a role in fixing the position of the strip 3; the squeezing roller 401 slides along the support block 402 through the through hole 403 through the elastic force of the sleeve 406 and the spring 405. At this time, the squeezing roller 401 applies a certain pressure downward to the strip 3, so that the outer peripheral wall of the squeezing roller 401 contacts the top surface of the strip 3 for squeezing;

[0039] At the same time, the servo motor 411 drives the bidirectional screw 408 to rotate. The rotation of the bidirectional screw 408 pushes the two U-shaped blocks 409 to move toward or away from each other along the guide rod 407. The movement of the U-shaped block 409 drives the roller 410 connected to it for rotation to clamp or release the side wall of the strip 3, thereby realizing precise adjustment of the position of the strip 3, effectively preventing the deviation of the strip 3 during the stripping process, reducing the stripping error, and improving the stripping yield rate. The U-shaped block 409 adapts to the stripping requirements of strips 3 of different thicknesses, widths and materials. When the strip 3 is conveyed to the position of the slitting roller 5, the multiple cutters 6 on the outer peripheral wall of the slitting roller 5 will cut the strip 3.

[0040] Example 2

[0041] like Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, on the basis of embodiment 1, the first grinding assembly 7 includes a vertical block 702, a through slot 703 is opened on the vertical block 702, the bottom surface of the vertical block 702 is fixedly connected to the top surface of the conveying bracket 1, and the vertical block 702 is symmetrically provided with two. The outer peripheral walls at both ends of the grinding roller 701 are slidably connected to the vertical block 702 through the through slot 703. The outer peripheral walls at both ends of the grinding roller 701 are clamped with fixed blocks 704. The inner side wall of the fixed block 704 is slidably connected to the outer side wall of the vertical block 702, and the two fixed blocks 704 are fixedly connected. A first connecting rod 705 is connected, and a second connecting rod 706 is fixedly connected between the two vertical blocks 702. A first cylinder 707 is installed on the first connecting rod 705 through a front end mounting seat. The piston rod of the first cylinder 707 passes through the first connecting rod 705, and the bottom surface of the piston rod of the first cylinder 707 is fixedly connected to the top surface of the second connecting rod 706; the outer peripheral wall of the cutter 6 is conveniently polished by the grinding roller 701, and the grinding roller 701 is driven to rise and fall by the piston rod of the first cylinder 707, thereby realizing automatic polishing of the cutter 6.

[0042] The second grinding assembly 8 includes a C-shaped block 802, a movable block 803 is slidably connected to the C-shaped block 802, a pneumatic slide 804 is installed on the upper end of the C-shaped block 802, a slider 805 is slidably connected to the pneumatic slide 804, the bottom surface of the slider 805 is fixedly connected to the top surface of the movable block 803, a lifting block 806 is slidably connected to the slider 805, the bottom surface of the lifting block 806 is fixedly connected to the grindstone 801, and the upper end of the lifting block 806 is fixedly connected to the push block 807, a second cylinder 808 is installed on the moving block 803 through a mounting seat, the top surface of the piston rod of the second cylinder 808 is fixedly connected to the bottom surface of the push block 807, and the side wall of the grindstone 801 is in friction contact with the side wall of the cutter 6; after the lifting block 806 drives the grindstone 801 to move to a suitable grinding height, the grindstone 801 is in friction contact with the side wall of the cutter 6, and the side wall of the grindstone 801 is ground by the contact between the rotating cutter 6 and the grindstone 801.

[0043] When in use, the piston rod of the first cylinder 707 is pushed to move under the reaction force of the second connecting rod 706, so that the first connecting rod 705 drives the fixed block 704 to slide along the vertical block 702, and the fixed block 704 drives the grinding roller 701 to slide along the vertical block 702 through the through slot 703, so that the outer peripheral wall of the grinding roller 701 is in friction contact with the outer peripheral wall of the cutter 6, and the rotation of the slitting roller 5 drives the cutter 6 to rotate and abut against the grinding roller 701 for grinding. The grinding roller 701 facilitates the grinding of the outer peripheral wall of the cutter 6, and the piston rod of the first cylinder 707 drives the grinding roller 701 to rise and fall, thereby realizing automatic grinding of the cutter 6, ensuring that the cutter 6 remains sharp and the consistency of the slitting quality is maintained;

[0044] The sliding block 805 is driven to move by the pneumatic slide 804, and the sliding block 805 drives the moving block 803 to move synchronously, at this time, the moving block 803 slides along the C-shaped block 802 and drives the lifting block 806 to move synchronously, the lifting block 806 drives the whetstone 801 to move to a suitable position, then the piston rod of the second pneumatic cylinder 808 drives the lifting block 806 to slide along the moving block 803 through the push block 807, the lifting block 806 drives the whetstone 801 to move to a suitable polishing height, then the whetstone 801 is in frictional contact with the side wall of the cutter 6, the whetstone 801 side wall is polished by the cutter 6 in rotation and the whetstone 801 abutting, the burrs on the cutter 6 due to slitting are reduced, the slitting quality is improved, the cutters 6 of different specifications and positions are adapted for polishing use, the service life of the cutter 6 is prolonged, the replacement frequency of the cutter 6 is reduced, and the production cost is reduced.

[0045] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A retainable and self-polishing slitter, comprising a conveying bracket (1), characterized in that: A conveying roller (2) is provided at one end of the conveying bracket (1), and both ends of the conveying roller (2) are rotatably connected to the conveying bracket (1). The outer peripheral wall of the upper end of the conveying roller (2) is in frictional contact with the strip (3). A retaining assembly (4) is provided on the upper side of the conveying roller (2), and an extrusion roller (401) is provided on the retaining assembly (4); A guide rod (407) is provided on the lower side of the extrusion roller (401), and a bidirectional lead screw (408) is provided on the lower side of the guide rod (407). A U-shaped block (409) is slidably connected to the guide rod (407), and the U-shaped block (409) is rotatably connected to two roller shafts (410) on the side close to the strip (3). The inner wall of the U-shaped block (409) is clearance-matched with the outer peripheral wall of the conveying roller (2), and the outer peripheral walls of the two roller shafts (410) are in frictional contact with the side walls of the strip (3). The U-shaped block (409) and the roller shaft (410) are clearance-matched, and the two U-shaped blocks (409) are respectively threadedly connected to the bidirectional lead screw (408) through threaded holes. A servo motor (411) is installed at the rear end of the conveying bracket (1) through a mounting seat, and the output shaft of the servo motor (411) is coaxially connected to the bidirectional lead screw (408).

2. The retainable and self-polishing slitter according to claim 1, characterized in that: A slitting roller (5) is provided at the other end of the interior of the conveying bracket (1), and a plurality of cutters (6) are sleeved on the outer peripheral wall of the slitting roller (5). A first grinding assembly (7) is provided at the upper end of one side of the slitting roller (5), and a grinding roller (701) is provided on the first grinding assembly (7), and the outer peripheral walls of the grinding roller (701) are in frictional contact with the outer peripheral walls of the cutters (6). A second grinding assembly (8) is fixedly provided on the top surface of one end of the conveying bracket (1), and a whetstone (801) is provided on the second grinding assembly (8).

3. The retainable and self-polishing slitter according to claim 2, characterized in that: One end of the central axis of the conveying roller (2) and the output shaft of the slitting roller (5) respectively penetrate the conveying bracket (1) and extend to the outside. Two drive motors (9) are installed on the outer wall of the conveying bracket (1) through a mounting seat, wherein the output shaft of one of the drive motors (9) is coaxially connected to the central axis of the conveying roller (2), and the output shaft of the other drive motor (9) is coaxially connected to the central axis of the slitting roller (5).

4. The retainable and self-polishing slitter according to claim 1, characterized in that: The retaining assembly (4) includes a support block (402), the bottom surface of the support block (402) is fixedly connected to the top surface of the conveying bracket (1), a through hole (403) is opened on the support block (402), the outer peripheral walls at both ends of the squeezing roller (401) are respectively slidably connected to the support block (402) through the through holes (403), a connecting block (404) is fixedly provided on the outer wall of the support block (402), a spring (405) is fixedly provided on the bottom surface of the connecting block (404), a sleeve (406) is fixedly provided on the bottom surface of the spring (405), and the outer peripheral walls at both ends of the squeezing roller (401) are respectively rotatably connected to the inner wall of the middle portion of the sleeve (406).

5. The retainable and self-polishing slitter according to claim 2, characterized in that: The first grinding assembly (7) includes a vertical block (702), a through slot (703) is provided on the vertical block (702), the bottom surface of the vertical block (702) is fixedly connected to the top surface of the conveying bracket (1), and the vertical blocks (702) are symmetrically arranged with two. The outer peripheral walls at both ends of the grinding roller (701) are slidably connected to the vertical blocks (702) through the through slot (703), and fixed blocks (704) are clamped on the outer peripheral walls at both ends of the grinding roller (701), and the inner side walls of the fixed blocks (704) are slidably connected to the outer side walls of the vertical blocks (702).

6. The retainable and self-polishing slitter according to claim 5, characterized in that: A first connecting rod (705) is fixedly connected between the two fixed blocks (704), and a second connecting rod (706) is fixedly connected between the two vertical blocks (702). A first cylinder (707) is mounted on the first connecting rod (705) via a front-end mounting seat. The piston rod of the first cylinder (707) passes through the first connecting rod (705), and the bottom surface of the piston rod of the first cylinder (707) is fixedly connected to the top surface of the second connecting rod (706).

7. The retainable and self-polishing slitter according to claim 2, characterized in that: The second polishing assembly (8) comprises a C-shaped block (802), a moving block (803) being slidably connected to the C-shaped block (802), a pneumatic slide (804) being mounted on the upper end of the C-shaped block (802), a slider (805) being slidably connected to the pneumatic slide (804), the bottom surface of the slider (805) being fixedly connected to the top surface of the moving block (803), and a lifting block (806) being slidably connected to the slider (805).

8. The retainable and self-polishing slitter according to claim 7, characterized in that: The bottom surface of the lifting block (806) is fixedly connected to the grindstone (801), and the upper end of the lifting block (806) is fixedly connected to the push block (807). A second cylinder (808) is installed on the moving block (803) through a mounting seat. The top surface of the piston rod of the second cylinder (808) is fixedly connected to the bottom surface of the push block (807), and the side wall of the grindstone (801) is in friction contact with the side wall of the cutter (6).

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