Magnetic stripe bottom grinding method

Abstract

The invention discloses a magnetic stripe bottom grinding method, and relates to the technical field of manganese zinc ferrite magnetic core production, and the method comprises the following steps: 1, laying a protective tablecloth on the outer surface of an electromagnetic rotating platform by a worker, and then fitting and placing a rhombic gasket on the surface of the protective tablecloth, and then the magnetic strip main body to be polished and processed is reversely placed on the upper surface of the rhombic gasket, and the electromagnetic rotating platform is opened. According to the method for grinding the bottom of the magnetic strip, through the arranged rhombic gasket, the magnetic strip bodies can be neatly and reversely arranged and stacked to the top of the bearing assembly, and then the magnetic strip bodies are ground through rotation of the bearing assembly and operation of the rotary grinding head; the disc grinding machine can quickly and efficiently grind a group of neatly stacked magnetic strip main bodies during operation, the grinding method is convenient, neat, simple and quick to use, the bottom flatness during grinding is ensured, unfilled corners are reduced, the defects of unevenness, unfilled corners, inclined grinding and the like after the bottom is ground are overcome, the product quality is ensured, and the product quality is improved. And the efficiency and benefits are improved.

Description

Technical Field

[0001] This invention relates to the field of manganese-zinc ferrite core manufacturing technology, specifically a method for grinding the base of magnetic strips. Background Technology

[0002] Manganese-zinc soft magnetic ferrite is ground using a pass-through grinder. The LR76 product has a special shape, and the flatness requirement of the bottom is <0.1mm. The bottom dimension needs to be ground. The ground product must meet the standard requirements in terms of size, and the bottom must be flat and uniform, without missing corners or grinding skewing.

[0003] The LR76 product has a unique shape, with a raised outer edge on a fan-shaped surface (see below for details). Figure 7 The bottom flatness requirement is <0.1mm, necessitating grinding of the bottom dimensions. The original grinding method involved manual grinding of each LR76 product individually, specifically holding the edge of the product and manually rubbing it on P80 metallographic sandpaper to flatten the bottom. This method resulted in products with skewed bottom dimensions, uneven surfaces, and a tendency to develop chipped corners. This method was time-consuming, labor-intensive, inefficient, and produced products with poor quality. Summary of the Invention

[0004] The purpose of this invention is to provide a method for grinding the bottom of a magnetic strip to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for grinding the bottom of a magnetic strip, comprising the following steps:

[0006] Step 1: The staff lays the protective tablecloth on the outer surface of the electromagnetic rotating platform, then places the diamond-shaped pads on the surface of the protective tablecloth, then places the magnetic strip body to be polished upside down on the upper surface of the diamond-shaped pads and turns on the electromagnetic rotating platform. At this time, the magnetic strip body is firmly fixed and attracted to the surface of the diamond-shaped pads by the cooperation of electromagnetic force, thus completing the preliminary preparation work.

[0007] Step 2: After all the magnetic strips have been placed, the operator turns on the rotary grinding head through the controller. When the rotary grinding head starts running, it drives the 325-grit grinding wheel to rotate. Then, the operator turns on the drive shaft through the controller. At this time, the electromagnetic rotary platform rotates on the top of the fixed support platform with the assistance of the arc-shaped slider. This allows the rotary grinding head to drive the 325-grit grinding wheel to evenly grind the placed magnetic strips.

[0008] Step 3: As the rotary grinding head operates, the bevel gear set drives the drive mechanism to rotate inside the hollow bearing box. This causes the fixed ring plate to intermittently squeeze the water pumping hose, which in turn generates suction in the connecting pipe to draw water from the storage tank into the water pumping hose and deliver it into the water supply pipe. Then, the water is sprayed onto the 325-grit grinding wheel through the cooling nozzles to cool the grinding area.

[0009] Step four: After all the magnetic strip bodies in a set have been polished, close both the support assembly and the rotary polishing head. Then, remove all the magnetic strip bodies from the top of the support assembly and replace them with new magnetic strip bodies to be polished. Next, open the support assembly and the rotary polishing head, allowing the support assembly to continue rotating 180 degrees, so that the magnetic strip bodies that were covered at the bottom of the rotary polishing head are exposed again. Then, repeat the above operation to replace the magnetic strip bodies, thereby achieving the purpose of continuous processing.

[0010] Furthermore, the magnetic strip grinding method utilizes a disc grinding machine, which includes a fixed support table, a bearing bracket, and a water pumping assembly. The bearing bracket is rotatably connected to the top of the fixed support table, and a protective tablecloth is laid on the outer surface of the bearing bracket. A diamond-shaped gasket is fitted onto the top of the protective tablecloth, and the magnetic strip body is fitted onto the top of the diamond-shaped gasket. The bearing bracket is fixedly installed on the side of the fixed support table, and a rotary grinding head is rotatably connected to the bottom of the bearing bracket. A 325-grit grinding wheel is fixedly installed at the bottom of the rotary grinding head, and a conical transmission gear set is installed on the upper outer surface of the rotary grinding head. The water pumping assembly is fixedly installed at the end of the bearing bracket, and a water supply pipe is installed at the end of the water pumping assembly. A cooling nozzle is fixedly connected to the other end of the water supply pipe, and a connecting pipe is installed at the other end of the water pumping assembly. A water storage tank is fixedly connected to the other end of the connecting pipe, and the inner side of the water storage tank is fixedly connected to the back of the bearing bracket.

[0011] Furthermore, the supporting component includes an electromagnetic rotating platform, and a drive shaft is fixedly connected to the bottom of the electromagnetic rotating platform. The outer surface of the drive shaft is rotatably connected to the interior of the fixed support platform, and arc-shaped sliders are installed at equal intervals in a ring at the bottom of the electromagnetic rotating platform.

[0012] Furthermore, the bottom of the electromagnetic rotating platform is fixedly connected to the top of the arc-shaped slider, and the bottom of the arc-shaped slider is slidably connected to the top of the fixed support platform. The electromagnetic rotating platform forms a sliding structure with the fixed support platform through the arc-shaped slider.

[0013] Furthermore, the top of the diamond-shaped pad is fitted and connected to the bottom of the magnetic strip body, and the thickness of the diamond-shaped pad is exactly the same as the height of the end protrusion of the magnetic strip body.

[0014] Furthermore, the pumping assembly includes a hollow support box, and fixed rods are symmetrically installed on the inner side of the hollow support box. A drive mechanism is rotatably connected inside the hollow support box, and a pumping hose is fixedly connected to the upper inner surface of the hollow support box. Meanwhile, a connecting frame is fixedly installed on the outer side of the hollow support box.

[0015] Furthermore, the end of the fixing rod is fixedly connected to the inner side of the hollow bearing box, and the other end of the fixing rod is fixedly connected to the end of the bearing bracket, and the hollow bearing box forms a fixed structure with the bearing bracket through the fixing rod.

[0016] Furthermore, the driving mechanism includes a fixed ring plate, and arc-shaped extrusion blocks are fixedly installed at equal intervals on the outer surface of the fixed ring plate, and a connecting shaft is fixedly connected to the inner surface of the fixed ring plate.

[0017] Furthermore, the outer surface of the connecting shaft is fixedly connected to the inner surface of the fixed ring plate, and the end of the connecting shaft is rotatably connected to the interior of the hollow bearing box. The fixed ring plate and the hollow bearing box form a rotating structure through the connecting shaft.

[0018] Furthermore, the end of the water pumping hose is fixedly connected to the end of the water supply pipe, and the other end of the water pumping hose is fixedly connected to the end of the connecting pipe, and the upper surface of the water pumping hose is fixedly connected to the upper inner surface of the hollow support box.

[0019] This invention provides a method for grinding the bottom of a magnetic strip, which has the following beneficial effects:

[0020] 1. This invention, through the use of diamond-shaped pads, allows the magnetic strip bodies to be neatly arranged upside down and stacked on top of the support component. Then, through the rotation of the support component and the operation of the rotary grinding head, the disc grinder can quickly and efficiently grind the neatly stacked set of magnetic strip bodies. This grinding method is convenient, neat, simple, and fast. It ensures a flat bottom during grinding, reduces missing corners, and solves defects such as unevenness, missing corners, and slant grinding after bottom grinding. This ensures product quality, improves efficiency and effectiveness, and the protective tablecloth can prevent workpiece slippage, improve processing stability, and absorb debris, optimizing the working environment. This results in the overall stability and efficiency of magnetic strip bottom grinding.

[0021] 2. This invention utilizes a conical transmission gear set to enable the rotary grinding head to drive the 325-grit grinding wheel for bottom grinding while simultaneously rotating the drive mechanism inside the hollow bearing box. This causes the fixed ring plate to drive the arc-shaped extrusion block to intermittently squeeze the water suction hose inside the hollow bearing box clockwise. Consequently, the water suction hose drives the drive mechanism to generate suction, thereby drawing out the cooling water from the hose and supplying it to the water supply pipe. Then, with the assistance of cooling nozzles, the cooling water is sprayed onto the grinding area of ​​the 325-grit grinding wheel and the workpiece, further improving the grinding effect on the workpiece. Furthermore, since the cooling water supply and the grinding of the 325-grit grinding wheel use the same driving force, the water pumping component stops pumping water when the rotary grinding head stops running, thus reducing the waste of cooling water and ensuring timely supply of cooling water during bottom grinding. Attached Figure Description

[0022] Figure 1 This is a frontal three-dimensional structural schematic diagram of a method for grinding the bottom of a magnetic strip according to the present invention;

[0023] Figure 2 This invention provides a method for grinding the bottom of a magnetic strip. Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0024] Figure 3 This is a three-dimensional structural diagram of a fixed support platform-electromagnetic rotating platform for a magnetic strip grinding method according to the present invention.

[0025] Figure 4 This is a bottom-view three-dimensional structural diagram of the support bracket-rotating grinding head for a magnetic strip grinding method of the present invention;

[0026] Figure 5 This is a three-dimensional structural diagram of the support bracket-hollow support box of the magnetic strip grinding method of the present invention;

[0027] Figure 6 This is a three-dimensional structural diagram of the hollow bearing box-fixed ring plate disassembled according to the present invention, which is a method for grinding the bottom of magnetic strips.

[0028] Figure 7 This is a schematic diagram of the physical structure of the magnetic strip body in the method for grinding the bottom of a magnetic strip according to the present invention.

[0029] In the diagram: 1. Fixed support platform; 2. Bearing component; 21. Electromagnetic rotating platform; 22. Drive shaft; 23. Arc-shaped slider; 3. Protective tablecloth; 4. Diamond-shaped gasket; 5. Magnetic strip body; 6. Bearing bracket; 7. Rotary grinding head; 8. 325-grit grinding wheel; 9. Conical transmission gear set; 10. Water pumping component; 101. Hollow bearing box; 102. Fixed rod; 103. Drive mechanism; 1031. Fixed ring plate; 1032. Arc-shaped extrusion block; 1033. Connecting shaft; 104. Water pumping hose; 105. Connecting frame; 11. Water supply pipe; 12. Cooling nozzle; 13. Connecting pipe; 14. Water storage tank. Detailed Implementation

[0030] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0031] like Figures 1-7 As shown, a method for grinding the bottom of a magnetic strip includes the following steps:

[0032] Step 1: The staff lays the protective tablecloth 3 on the outer surface of the electromagnetic rotating platform 21, then places the diamond-shaped pad 4 on the surface of the protective tablecloth 3, then places the magnetic strip body 5 to be polished upside down on the upper surface of the diamond-shaped pad 4 and turns on the electromagnetic rotating platform 21. At this time, the magnetic strip body 5 is firmly fixed and attracted to the surface of the diamond-shaped pad 4 by the cooperation of electromagnetic force, thus completing the preliminary preparation work.

[0033] Step 2: After all the magnetic strip bodies 5 have been placed, the staff will turn on the rotary grinding head 7 through the controller. When the rotary grinding head 7 starts running, it will drive the 325-grit grinding wheel 8 to rotate. Then, the drive shaft 22 will be turned on through the controller. At this time, the electromagnetic rotary platform 21 will rotate on the top of the fixed support platform 1 with the assistance of the arc-shaped slider 23. This will cause the rotary grinding head 7 to drive the 325-grit grinding wheel 8 to grind the placed magnetic strip bodies 5 evenly.

[0034] Step 3: As the rotary grinding head 7 operates, the bevel transmission gear set 9 drives the drive mechanism 103 to rotate inside the hollow bearing box 101. This causes the fixed ring plate 1031 to drive the arc-shaped extrusion block 1032 to intermittently extrude water into the water pumping hose 104. Consequently, the connecting pipe 13 automatically generates suction to draw water from the water storage tank 14 into the water pumping hose 104 and deliver it into the water supply pipe 11. Then, the water is sprayed onto the 325-grit grinding wheel 8 through the cooling nozzle 12, thereby achieving the purpose of cooling the grinding area with water spray.

[0035] Step four: After all the magnetic strip bodies 5 in a set have been polished, close both the bearing assembly 2 and the rotary polishing head 7. Then, remove all the magnetic strip bodies 5 from the top of the bearing assembly 2 and replace them with new magnetic strip bodies 5 to be polished. Next, open the bearing assembly 2 and the rotary polishing head 7, allowing the bearing assembly 2 to continue rotating 180 degrees, so that the magnetic strip bodies 5 that were covered at the bottom of the rotary polishing head 7 are exposed again. Then, repeat the above operation to replace the magnetic strip bodies 5, thereby achieving the purpose of continuous processing.

[0036] like Figures 1-5 As shown, the magnetic strip grinding method utilizes a disc grinding machine. The disc grinding machine includes a fixed support platform 1, a support bracket 6, and a pumping assembly 10. The top of the fixed support platform 1 is rotatably connected to the support assembly 2, which includes an electromagnetic rotating platform 21. A drive shaft 22 is fixedly connected to the bottom of the electromagnetic rotating platform 21, and the outer surface of the drive shaft 22 is rotatably connected to the interior of the fixed support platform 1. Furthermore, arc-shaped sliders 23 are installed at equal intervals in a ring shape at the bottom of the electromagnetic rotating platform 21. The bottom of the electromagnetic rotating platform 21 is fixedly connected to the top of the arc-shaped sliders 23, and the bottom of the arc-shaped sliders 23 is slidably connected to the top of the fixed support platform 1. The electromagnetic rotating platform 21 and the fixed support platform 1 form a sliding structure through the arc-shaped sliders 23. Through this sliding structure, the electromagnetic rotating platform 21 and the fixed support platform 1... This makes the electromagnetic rotating platform 21 rotate more smoothly and stably when it rotates directly above the fixed support platform 1. The outer surface of the bearing component 2 is covered with a protective tablecloth 3, and a diamond-shaped pad 4 is attached to the top of the protective tablecloth 3. The magnetic strip body 5 is attached to the top of the diamond-shaped pad 4. The top of the diamond-shaped pad 4 is attached to the bottom of the magnetic strip body 5. The thickness of the diamond-shaped pad 4 is exactly the same as the height of the end protrusion of the magnetic strip body 5. By setting the thickness of the diamond-shaped pad 4 to be exactly the same as the height of the end protrusion of the magnetic strip body 5, the magnetic strip body 5 can be firmly placed on the surface of the diamond-shaped pad 4 when it is placed upside down. The bearing bracket 6 is fixedly installed on the side of the fixed support platform 1, and a rotary grinding head 7 is rotatably connected to the bottom of the bearing bracket 6. A 325-grit grinding wheel 8 is fixedly installed at the bottom of the rotary grinding head 7.

[0037] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, the support bracket 6 is fixedly installed on the side of the fixed support platform 1, and a rotary grinding head 7 is rotatably connected to the bottom of the support bracket 6. A 325-grit grinding wheel 8 is fixedly installed on the bottom of the rotary grinding head 7, and a conical transmission gear set 9 is installed on the upper outer surface of the rotary grinding head 7. The water pumping assembly 10 is fixedly installed at the end of the support bracket 6. The water pumping assembly 10 includes a hollow support box 101, and fixing rods 102 are symmetrically installed on the inner side of the hollow support box 101. The end of the fixing rod 102 is fixedly connected to the inner side of the hollow support box 101, and the other end of the fixing rod 102 is fixedly connected to the end of the support bracket 6. The support box 101 and the support bracket 6 form a fixed structure via the fixing rod 102. This fixed structure of the hollow support box 101 and the support bracket 6 ensures that the pumping assembly 10 is firmly suspended from the end of the support bracket 6, preventing it from becoming loose during auxiliary pumping. A drive mechanism 103 is rotatably connected inside the hollow support box 101. The drive mechanism 103 includes a fixing ring plate 1031, and arc-shaped extrusion blocks 1032 are fixedly mounted at equal intervals on the outer surface of the fixing ring plate 1031. A connecting shaft 1033 is fixedly connected to the inner surface of the fixing ring plate 1031. The outer surface of the fixed ring plate 1031 is fixedly connected to the inner surface of the fixed ring plate 1031, and the end of the connecting shaft 1033 is rotatably connected to the interior of the hollow bearing box 101. The fixed ring plate 1031 and the hollow bearing box 101 form a rotating structure via the connecting shaft 1033. Through the rotating structure of the fixed ring plate 1031 and the hollow bearing box 101, the fixed ring plate 1031 can drive the arc-shaped extrusion block 1032 to rotate stably inside the hollow bearing box 101, thereby achieving the purpose of intermittently extruding and assisting water pumping of the pumping hose 104. Furthermore, the upper inner surface of the hollow bearing box 101 is fixedly connected to the pumping hose 104. The end of pipe 104 is fixedly connected to the end of water supply pipe 11, and the other end of water pumping hose 104 is fixedly connected to the end of connecting pipe 13. The upper surface of water pumping hose 104 is fixedly connected to the upper inner surface of hollow support box 101. Meanwhile, a connecting frame 105 is fixedly installed on the outside of hollow support box 101. The end of water pumping assembly 10 is equipped with water supply pipe 11, and the other end of water supply pipe 11 is fixedly connected to cooling nozzle 12. The other end of water pumping assembly 10 is equipped with connecting pipe 13, and the other end of connecting pipe 13 is fixedly connected to water storage tank 14. The inner side of water storage tank 14 is fixedly connected to the back of support bracket 6.

[0038] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A method for grinding the bottom of a magnetic strip, characterized in that, The method for grinding the magnetic stripe includes the following steps: Step 1: The staff lays the protective tablecloth (3) on the outer surface of the electromagnetic rotating platform (21), then places the diamond-shaped pad (4) on the surface of the protective tablecloth (3), then places the magnetic strip body (5) to be polished upside down on the upper surface of the diamond-shaped pad (4) and turns on the electromagnetic rotating platform (21). At this time, the magnetic strip body (5) is firmly fixed and adsorbed on the surface of the diamond-shaped pad (4) by the cooperation of electromagnetic force, thus completing the preliminary preparation work. Step 2: After all the magnetic strip bodies (5) are placed, the staff will turn on the rotary grinding head (7) through the controller. When the rotary grinding head (7) starts running, it will drive the 325-mesh grinding wheel (8) to rotate. Then, the drive shaft (22) will be turned on through the controller. At this time, the electromagnetic rotary platform (21) will rotate on the top of the fixed support platform (1) with the assistance of the arc-shaped slider (23). This will cause the rotary grinding head (7) to drive the 325-mesh grinding wheel (8) to grind the placed magnetic strip bodies (5) evenly. Step 3: As the rotary grinding head (7) runs, the rotary grinding head (7) drives the drive mechanism (103) to rotate inside the hollow bearing box (101) while running, through the cooperation of the bevel transmission gear set (9). This causes the fixed ring plate (1031) to drive the arc-shaped extrusion block (1032) to intermittently extrude the water pumping hose (104), thereby causing the connecting pipe (13) to automatically generate suction to draw water from the water storage tank (14) into the water pumping hose (104) and deliver it into the water supply pipe (11). Then, through the cooperation of the cooling nozzle (12), the water is sprayed onto the 325-mesh grinding wheel (8) to achieve the purpose of spraying water to cool the grinding area. Step 4: After all the magnetic strip bodies (5) in a set have been polished, close both the bearing assembly (2) and the rotary polishing head (7). Then, remove all the magnetic strip bodies (5) on the top of the bearing assembly (2) and replace them with new magnetic strip bodies (5) to be polished. Then, open the bearing assembly (2) and the rotary polishing head (7) so that the bearing assembly (2) continues to rotate 180 degrees, so that the magnetic strip bodies (5) that were covered at the bottom of the rotary polishing head (7) are exposed again. Then, repeat the above operation to replace the magnetic strip bodies (5) in order to achieve continuous processing.

2. The method for grinding the bottom of a magnetic strip according to claim 1, characterized in that, The method of grinding the magnetic stripe is applied using a disc grinding machine, which includes a fixed support table (1), a bearing bracket (6), and a water pumping assembly (10). The top of the fixed support table (1) is rotatably connected to the bearing assembly (2), and the outer surface of the bearing assembly (2) is covered with a protective tablecloth (3). A diamond-shaped gasket (4) is fitted onto the top of the protective tablecloth (3), and a magnetic stripe body (5) is fitted onto the top of the diamond-shaped gasket (4). The bearing bracket (6) is fixedly installed on the side of the fixed support table (1), and a rotary grinding head (7) is rotatably connected to the bottom of the bearing bracket (6). A 325-mesh grinding wheel (8) is fixedly installed at the bottom of the rotary grinding head (7), and a conical transmission gear set (9) is installed on the upper outer surface of the rotary grinding head (7). The water pumping assembly (10) is fixedly installed at the end of the support bracket (6), and a water supply pipe (11) is installed at the end of the water pumping assembly (10). A cooling nozzle (12) is fixedly connected to the other end of the water supply pipe (11), and a connecting pipe (13) is installed at the other end of the water pumping assembly (10). At the same time, a water storage tank (14) is fixedly connected to the other end of the connecting pipe (13). The inner side of the water storage tank (14) is fixedly connected to the back of the support bracket (6).

3. The method for grinding the bottom of a magnetic strip according to claim 2, characterized in that, The bearing component (2) includes an electromagnetic rotating platform (21), and a drive shaft (22) is fixedly connected to the bottom of the electromagnetic rotating platform (21). The outer surface of the drive shaft (22) is rotatably connected to the inside of the fixed support platform (1). Furthermore, arc-shaped sliders (23) are installed at equal intervals in a ring at the bottom of the electromagnetic rotating platform (21).

4. The method for grinding the bottom of a magnetic strip according to claim 3, characterized in that, The bottom of the electromagnetic rotating platform (21) is fixedly connected to the top of the arc-shaped slider (23), and the bottom of the arc-shaped slider (23) is slidably connected to the top of the fixed support platform (1). The electromagnetic rotating platform (21) and the fixed support platform (1) form a sliding structure through the arc-shaped slider (23).

5. The method for grinding the bottom of a magnetic strip according to claim 2, characterized in that, The top of the diamond-shaped pad (4) is attached to the bottom of the magnetic strip body (5), and the thickness of the diamond-shaped pad (4) is exactly the same as the height of the end protrusion of the magnetic strip body (5).

6. The method for grinding the bottom of a magnetic strip according to claim 2, characterized in that, The pumping assembly (10) includes a hollow support box (101), and fixed rods (102) are symmetrically installed on the inner side of the hollow support box (101). A drive mechanism (103) is rotatably connected inside the hollow support box (101), and a pumping hose (104) is fixedly connected to the upper inner surface of the hollow support box (101). Meanwhile, a connecting frame (105) is fixedly installed on the outer side of the hollow support box (101).

7. The method for grinding the bottom of a magnetic strip according to claim 6, characterized in that, The end of the fixing rod (102) is fixedly connected to the inner side of the hollow bearing box (101), and the other end of the fixing rod (102) is fixedly connected to the end of the bearing bracket (6). The hollow bearing box (101) and the bearing bracket (6) form a fixed structure through the fixing rod (102).

8. The method for grinding the bottom of a magnetic strip according to claim 6, characterized in that, The driving mechanism (103) includes a fixed ring plate (1031), and arc-shaped extrusion blocks (1032) are fixedly installed at equal intervals on the outer surface of the fixed ring plate (1031), and a connecting shaft (1033) is fixedly connected to the inner surface of the fixed ring plate (1031).

9. A method for grinding the bottom of a magnetic strip according to claim 8, characterized in that, The outer surface of the connecting shaft (1033) is fixedly connected to the inner surface of the fixed ring plate (1031), and the end of the connecting shaft (1033) is rotatably connected to the interior of the hollow bearing box (101). The fixed ring plate (1031) and the hollow bearing box (101) form a rotating structure through the connecting shaft (1033).

10. A method for grinding the bottom of a magnetic strip according to claim 6, characterized in that, The end of the water pumping hose (104) is fixedly connected to the end of the water supply pipe (11), and the other end of the water pumping hose (104) is fixedly connected to the end of the connecting pipe (13). The upper surface of the water pumping hose (104) is fixedly connected to the upper inner surface of the hollow bearing box (101).

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