A grinding wheel for tread cleaning device and preparation method thereof

Abstract

The invention relates to a tread cleaning device grinding wheel and a preparation method thereof, and belongs to the technical field of brake materials. The invention comprises a back plate and a friction body, wherein the friction body comprises a wheel rim lubrication block, a tread shaping block and a tread cleaning block; the wheel rim lubrication block comprises, by weight percentage, 10% to 15% of a binder, 4% to 10% of a reinforcing fiber, 50% to 65% of a lubricating material and 20% to 25% of a filler; the tread shaping block comprises, by weight percentage, 15% to 25% of a binder, 12% to 20% of a reinforcing fiber, 8% to 12% of a friction-increasing material, 18% to 30% of a friction-reducing material and 25% to 35% of a filler; the tread cleaning block comprises, by weight percentage, 10% to 15% of a binder, 5% to 10% of a reinforcing fiber, 10% to 20% of a friction-increasing material, 15% to 25% of a friction-reducing material and 30% to 60% of a filler. The invention arranges the grinding block material composition in blocks to realize the integrated shaping, viscosity-increasing, lubricating and cleaning functions according to the use requirements of the tread and wheel rim.

Description

Technical Field

[0001] The invention relates to the technical field of rail vehicle brake materials, and in particular to a grinding wheel of a tread cleaning device and a preparation method thereof. Background Art

[0002] In recent years, with the rapid development of high-speed rail transportation industry, train operation safety has always attracted people's attention. As an important running component of the bogie, the wheel directly affects the running safety of the train when its tread is out of round, scratched or has low adhesion.

[0003] According to years of tracking of existing vehicles, the tread cleaning device can improve the condition of the wheel tread, increase wheel-rail adhesion, and suppress the phenomenon of wheel tread out of roundness, so the grinding wheel in the tread cleaning device is an indispensable part of the bogie. However, during the operation of the train, the part in contact with the rail is more severely worn than the other parts of the wheel, and pit defects appear on the tread. The grinding wheel will conform to the shape during use, resulting in uneven tread wear and abnormal wheel-rail contact, leading to adverse phenomena such as shaking, vibration, and noise, affecting the safety of train operation and service life.

[0004] The quality and mechanical properties of the grinding block have a direct impact on the application of the grinding block. Since the grinding block is made of composite materials, the properties of each component material are different. The traditional constant pressure process leads to poor interface bonding, which affects the wear rate and friction stability. In the prior art, the composition ratio of the grinding block is studied to prepare a grinding block that can reduce abnormal wheel wear and improve tread performance. For example, Chinese patent application CN 107188456 "Motor vehicle tread cleaner shaping grinding wheel and its preparation method" discloses the formula and preparation method of the grinding wheel for the motor vehicle, which has been used on the Changke standard motor vehicle. The function of repairing wheel surface defects and out-of-roundness is very obvious, and there is no crack, hot spot, spark, metal inlay, delamination, block drop and other undesirable phenomena, no damage to the pair, and the effect is very good. Chinese patent application CN 108359212 "A grinding block for rail vehicles and its preparation method" discloses the formula and preparation method of grinding blocks for high-speed rail. By adjusting the components and content of the grinding blocks, the grinding blocks can repair wheel tread defects and out-of-roundness (i.e., polygons), and can timely eliminate the fatigue state and capillary cracks on the wheel surface, thereby avoiding peeling on the wheel surface and eliminating high-frequency vibrations between the wheel and the rail. However, when the grinding block is in use, due to the irregularity of the wheel surface, different parts of the wheel surface are subjected to different wear during the driving process of the motor vehicle. For example, the wheel rim part and the inner side of the rail mainly collide and frictionally wear. The wheel tread belongs to rolling contact wear with the track. Using the same grinding block for wheel grinding at different parts of the wheel cannot effectively achieve the effect of repairing the wheel surface and improving the wheel surface performance. Therefore, a tread cleaning device grinding block is urgently needed to solve the problem that the grinding block of the rail wheel tread cleaning device in the prior art has poor wheel repair effect, causes abnormal wheel-rail contact, and affects use. Summary of the invention

[0005] The object of the present invention is to provide a grinding wheel for a tread cleaning device and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tread cleaning device grinding wheel, comprising a back plate and a friction body, wherein the friction body is divided into a wheel rim lubrication block, a tread shaping block and a tread cleaning block according to the contact position with the wheel; the wheel rim lubrication block comprises, by weight percentage, 10% to 15% of a binder, 4% to 10% of reinforcing fiber, 50% to 65% of a lubricating material and 20% to 25% of a filler; the tread shaping block comprises, by weight percentage, 15% to 25% of a binder, 12% to 20% of reinforcing fiber, 8% to 12% of a friction-increasing material, 18% to 30% of a friction-reducing material and 25% to 35% of a filler; the tread cleaning block comprises, by weight percentage, 10% to 15% of a binder, 5% to 10% of reinforcing fiber, 10% to 20% of a friction-increasing material, 15% to 25% of a friction-reducing material and 30% to 60% of a filler.

[0007] Preferably, the binder of the wheel rim lubrication block, the tread shaping block and the tread cleaning block is a rubber-modified phenolic resin, and the resin particle size is 200 mesh, the polymerization rate at 150°C is 50-80s, and the fluidity is 15-25mm; the filler of the wheel rim lubrication block, the tread shaping block and the tread cleaning block is at least one of barite, iron powder, calcium carbonate and diatomaceous earth. The base material binder used in these three material blocks is the same as the rubber-modified phenolic resin. The phenolic resin mainly plays the role of bonding material and molding in the grinding wheel. The higher the resin content, the smaller the density of the grinding wheel, the higher the impact strength and compression strength of the grinding wheel, and the better the wear resistance. The present invention selects a phenolic resin with high temperature resistance and wear resistance, which can further increase the service life of the grinding wheel.

[0008] Preferably, the reinforcing fiber of the wheel rim lubrication block, tread shaping block and tread cleaning block is at least one of carbon fiber, aramid fiber and ceramic fiber. The reinforcing fiber of the present invention is at least one of carbon fiber, aramid fiber and ceramic fiber, wherein carbon fiber has excellent high temperature resistance, good strength, wear resistance and good conductivity. The use of carbon fiber can make the friction material not easy to break, and the friction performance is stable under wear and high temperature. Aramid fiber has low density, high modulus, high temperature resistance and low wear rate, and has good surface adsorption, and can be well infiltrated and combined with resin and filler. Ceramic fiber has excellent properties such as high temperature resistance and wear resistance, and can absorb braking noise and stabilize friction coefficient. It is one of the ideal substitutes for asbestos. By adjusting the proportions of the three components in the reinforcing material, the grinding wheel in the embodiment of the present invention has excellent mechanical effect and friction and wear effect.

[0009] Preferably, the lubricating material of the wheel rim lubrication block is at least one of molybdenum disulfide and flake graphite; the lubricating material contains two powder particle sizes, 100 mesh and 325 mesh, of which the particle size of molybdenum disulfide is 325 mesh, and the particle size of flake graphite is 100 mesh, and the ratios of the lubricating materials are 1:1, 1:2, and 1:3.

[0010] Preferably, the friction-increasing material of the tread shaping block and the tread cleaning block is at least one of brown corundum, alumina, quartz powder and silicon carbide. The friction-increasing material has two powder particle sizes, 50-100 mesh and 200-250 mesh. The ratio of the two powder particle sizes is: the weight ratio of the friction-increasing material with a particle size of 50-100 mesh to the friction-increasing material with a particle size of 100-200 mesh is 1:4-5. Among the friction-increasing materials, alumina has a high melting point, high hardness and good thermal stability. It can effectively increase the friction coefficient in friction materials and reduce cracking caused by thermal decay. Brown corundum has high hardness and can increase the friction coefficient to a higher degree than alumina. A very small amount is enough to produce a good friction-increasing effect. Quartz powder has high heat resistance, high moisture resistance, high filling volume, low friction coefficient and low expansion rate, which can improve friction stability without scratching the mating surface. Silicon carbide has high hardness, high wear resistance and high thermal conductivity. It can dissipate the heat generated by friction and effectively reduce wear in friction materials. In addition, adding a small amount of ultrafine tungsten carbide powder to the grinding wheel can improve the grinding efficiency of the grinding wheel on the initial polygon of the wheel. Selecting appropriate materials and proportions in the friction-increasing materials can effectively grind the wheel and increase the adhesion between the wheel and the rail.

[0011] Preferably, the anti-friction material of the tread shaping block and the tread cleaning block is at least one of molybdenum disulfide, petroleum coke and graphite. The anti-friction material contains two powder particle sizes, 40 mesh and 1000 mesh, respectively. The particle size of graphite and petroleum coke is 40 mesh, and the particle size of molybdenum disulfide is 1000 mesh. The ratios of the anti-friction materials are 1:3, 1:2 and 2:1. Among the anti-friction materials, the hardness and friction coefficient of molybdenum disulfide are small, which can play a role in friction reduction. At the same time, molybdenum disulfide covers the surface of the friction material, which can protect other materials from oxidation. Because of its strong adhesion, it can prevent other materials from falling off, so as to achieve the best effect during braking; graphite has good electrical and thermal conductivity and lubrication properties, its chemical properties are extremely stable, and it can resist high temperature, acid and corrosion. It is an excellent anti-friction material; in addition, due to its good porosity, coke can play the role of skeleton material in the friction material, reducing braking noise and thermal decay during high temperature friction. In the friction material, the mixture of coke, molybdenum disulfide and graphite in a certain proportion can make the friction material have perfect comprehensive properties.

[0012] The present invention also provides a method for preparing a grinding wheel of a tread cleaning device, comprising the following steps: S1. Pre-treating the reinforcing fibers; performing an opening treatment on the carbon fibers and / or aramid fibers, wherein the opening treatment time is 5-10 minutes; S2. Mixing: using a mixer, materials are mixed according to the component formula ratio of the wheel rim lubrication block, the tread shaping block and the tread cleaning block, and the mixing time is 30-60 minutes to obtain three mixed materials; S3, pressurizing the mixture; putting the three dried mixtures into a mold, pressurizing them by a hot press, controlling the hot pressing temperature at 130-150° C., pressurizing for 25-40 minutes under a pressurizing process of 10-24 MPa, and obtaining the first hot-pressed product after complete pressure release; S4, performing variable temperature curing on the first product; placing the first product in a curing furnace for temperature-raising curing, and obtaining a second product after curing is completed; S5. Paint the product; immerse the second product with a surface temperature of 25-35°C in the paint for 8-15s, and dry it at 145-155°C to obtain the finished product.

[0013] Preferably, when mixing in S2, the pre-opened fibers are first mixed with a portion of the filler, and then the remaining materials are added and mixed together.

[0014] Preferably, when the mixture is pressurized and pressed in S3, the three dried mixtures are loaded into the mold. When loading, different types of mixtures are separated by baffles, and the baffles are removed after all the mixtures are added. The hot press is started, and the hot pressing temperature is controlled at 130-150°C, and pressing is performed according to a multiple pressure-boosting process: the molding pressure is applied 5 times in total, i.e. 16MPa→18MPa→20MPa→22MPa→24MPa; each time the pressure is applied lasts for 60s, and the deflation time is 20s. After applying the molding pressure 5 times, the holding pressure is set to 20MPa for 800s, and the deflation time and molding temperature parameters are the same. After complete pressure release, the first product is obtained.

[0015] Preferably, when the first product is subjected to variable temperature curing in S4, the first product is placed in a curing furnace and cured by heating according to the following process: heating from room temperature to 60°C for 1h, heating from 60 to 90°C for 2h, heating from 90 to 130°C for 4h, heating from 130 to 160°C for 6h and heating from 160 to 180°C for 2h, and then naturally cooled to a temperature below 40°C. Beneficial Effects

[0016] 1. The present invention is based on the different wear suffered by different parts of the wheel surface during the running of the motor vehicle, that is, the different wear and effect requirements of the wheel rim, tread (rolling circle contact part) and tread (the rest of the part). The grinding sub-body of the tread cleaning device is divided into three material blocks to form three grinding bodies with different compositions, hardness, functions and other properties. The material composition of the grinding blocks is arranged in blocks to realize the integration of shaping, viscosity enhancement, lubrication, cleaning and other functions according to the use requirements of the tread and rim; solve the problems of vehicle shaking and noise caused by uneven wheel wear and abnormal wheel-rail contact, optimize the service life of the wheel, and aim to reduce abnormal wheel wear and improve the surface performance of the tread and rim.

[0017] 2. The grinding sub-body of the present invention includes a rim lubrication block in contact with the wheel rim, a tread shaping block and a tread cleaning block in contact with the wheel tread, wherein the rim lubrication block contains lubricating materials, which can be used to fill micro scratches and repair damaged surfaces, greatly reducing the friction and wear between the locomotive rim and the side of the rail. The tread shaping block mainly contacts the rolling circle part of the wheel, and contains friction-reducing materials and friction-increasing materials, which can be used to shape the surface defects of the wheel and increase the friction between the wheel and the track. The tread cleaning block also contains friction-reducing materials and friction-increasing materials, but the added amount is different from that of the tread shaping block, which can form different mechanical properties, and can be used to clean the wheel tread debris and repair the wheel tread.

[0018] 3. The present invention also provides a method for preparing a grinding wheel for a tread cleaning device. Compared with the conventional grinding wheel preparation process, which uses a constant pressure process, the material interface bonding is poor, thereby affecting the grinding wheel wear rate and friction stability. The preparation method of the present invention uses a boosting process to help improve the matrix interface bonding structure of the grinding block, thereby improving the material uniformity during the molding of the grinding block, so that the various fillers are fully bonded, which has a great impact on the material friction coefficient and stability, and solves the bonding uniformity of the various materials of the grinding block and the stability of the grinding block friction factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the grinding wheel cleaning method according to the embodiment. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0021] Example 1: Please refer to Figure 1 The present embodiment provides a tread cleaning device grinding wheel, comprising a back plate 3 and a friction body 4, wherein the friction body is divided into a wheel rim lubrication block 1, a tread shaping block 2 and a tread cleaning block 5 according to the contact part with the wheel; the wheel rim lubrication block 1 comprises, by weight percentage, 10% of a binder, 4% of reinforcing fiber, 65% of a lubricating material and 21% of a filler; the tread shaping block 2 comprises, by weight percentage, 15% of a binder, 12% of a reinforcing fiber, 8% of a friction-increasing material, 30% of a friction-reducing material and 35% of a filler; the tread cleaning block 5 comprises, by weight percentage, 10% of a binder, 5% of a reinforcing fiber, 10% of a friction-increasing material, 15% of a friction-reducing material and 60% of a filler.

[0022] The binder of the wheel rim lubrication block 1, the tread shaping block 2 and the tread cleaning block 5 of this embodiment is a rubber-modified phenolic resin, and the resin particle size is 200 mesh, the polymerization rate at 150°C is 50-80s, and the fluidity is 15-25mm; the filler of the wheel rim lubrication block, the tread shaping block and the tread cleaning block is at least one of barite, iron powder, calcium carbonate and diatomaceous earth. The reinforcing fiber of the wheel rim lubrication block, the tread shaping block and the tread cleaning block of this embodiment is at least one of carbon fiber, aramid fiber and ceramic fiber. Specifically, the reinforcing fiber of the wheel rim lubrication block is carbon fiber and aramid fiber, the reinforcing fiber of the tread shaping block is carbon fiber, aramid fiber and ceramic fiber, and the reinforcing fiber of the tread cleaning block is carbon fiber, aramid fiber and ceramic fiber.

[0023] The lubricating material of the wheel rim lubrication block of this embodiment is at least one of molybdenum disulfide and flake graphite; the lubricating material contains two powder particle sizes, 100 mesh and 325 mesh, among which the particle size of molybdenum disulfide is 325 mesh, and the particle size of flake graphite is 100 mesh, and the ratios of the lubricating materials are 1:1, 1:2, and 1:3.

[0024] The friction-increasing material of the tread shaping block and the tread cleaning block of the present embodiment is at least one of brown corundum, alumina, quartz powder and silicon carbide, and the friction-increasing material has two powder particle sizes, 50-100 mesh and 200-250 mesh, and the ratio of the two powder particle sizes is: the weight ratio of the friction-increasing material with a particle size of 50-100 mesh to the friction-increasing material with a particle size of 100-200 mesh is 1:4-5. Further, the friction-reducing material of the tread shaping block and the tread cleaning block of the present embodiment is at least one of molybdenum disulfide, petroleum coke and graphite, and the friction-reducing material contains two powder particle sizes, 40 mesh and 1000 mesh, respectively, wherein the particle size of graphite and petroleum coke is 40 mesh, and the particle size of molybdenum disulfide is 1000 mesh, and the ratio of each friction-reducing material is 1:3, 1:2, and 2:1.

[0025] The method for preparing the grinding wheel of the tread cleaning device of this embodiment comprises the following steps: S1. Pre-treating the reinforcing fibers; opening the carbon fibers and aramid fibers for 5-10 minutes; S2. Mixing: Using a mixer, materials are mixed according to the component formula ratio of the wheel rim lubrication block, the tread shaping block and the tread cleaning block. The pre-opened fibers are first mixed with part of the filler, and then the remaining materials are added and mixed together. The mixing time is 30-60 minutes to obtain three mixed materials; S3, pressurizing the mixture; loading the three dried mixtures into the mold, separating different types of mixtures with baffles during loading, and removing the baffles after all the mixtures are added; starting the hot press, controlling the hot pressing temperature at 130-150°C, and pressing according to the multiple pressure-increasing process: the molding pressure is applied 5 times in total, i.e., 16MPa→18MPa→20MPa→22MPa→24MPa; each application of pressure lasts for 60s, and the deflation time is 20s. After applying the molding pressure 5 times, the holding pressure is set to 20MPa for 800s, and the deflation time and molding temperature parameters are the same. After complete pressure release, the first product is obtained; S4, performing variable temperature curing on the first product; placing the first product in a curing furnace, and curing it by heating according to the following process: heating from room temperature to 60°C for 1h, heating from 60 to 90°C for 2h, heating from 90 to 130°C for 4h, heating from 130 to 160°C for 6h, and heating from 160 to 180°C for 2h, and then naturally cooling to a temperature below 40°C to obtain a second product; S5. Paint the product; immerse the second product with a surface temperature of 25-35°C in the paint for 8-15s, and dry it at 145-155°C to obtain the finished product.

[0026] Example 2: The main difference between Example 2 and Example 1 is that the wheel rim lubrication block 1 in Example 2 comprises, by weight percentage, 13% of binder, 6% of reinforcing fiber, 58% of lubricating material and 23% of filler; the tread shaping block 2 comprises, by weight percentage, 20% of binder, 16% of reinforcing fiber, 10% of friction-increasing material, 24% of friction-reducing material and 30% of filler; the tread cleaning block 5 comprises, by weight percentage, 13% of binder, 8% of reinforcing fiber, 15% of friction-increasing material, 20% of friction-reducing material and 44% of filler.

[0027] Example 3: The main difference between Example 3 and Example 1 is that the wheel rim lubrication block 1 in Example 3 comprises, by weight percentage, 15% of binder, 10% of reinforcing fiber, 50% of lubricating material and 25% of filler; the tread shaping block 2 comprises, by weight percentage, 25% of binder, 20% of reinforcing fiber, 12% of friction-increasing material, 18% of friction-reducing material and 25% of filler; the tread cleaning block 5 comprises, by weight percentage, 15% of binder, 10% of reinforcing fiber, 20% of friction-increasing material, 25% of friction-reducing material and 30% of filler.

[0028] Finally, the abrasives obtained from each embodiment were subjected to a mechanical property test according to the test method of TB / T3196-2015 "Synthetic brake shoes for locomotives". The performance of the abrasives prepared from the abrasive materials of each embodiment is shown in the table below. In the table, material block 1 of each embodiment is a wheel rim lubrication block, material block 2 is a tread shaping block, and material block 3 is a tread cleaning block. During the test, the abrasive samples did not show any cracking, fragmentation, falling off, or sharp wear. When the abrasives of the present invention were used, the wheel tread did not show any damage such as scratches, sharp wear, or peeling, the wheel rim was evenly worn, and the wheel was in normal contact with the track.

[0029]

[0030] As above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A grinding wheel for a tread cleaning device, comprising a back plate and a friction body, characterized in that: The friction body is divided into a wheel rim lubrication block, a tread shaping block and a tread cleaning block according to the contact part with the wheel; the wheel rim lubrication block comprises, by weight percentage, 10% to 15% of a binder, 4% to 10% of reinforcing fiber, 50% to 65% of a lubricating material and 20% to 25% of a filler; the tread shaping block comprises, by weight percentage, 15% to 25% of a binder, 12% to 20% of reinforcing fiber, 8% to 12% of a friction-increasing material, 18% to 30% of a friction-reducing material and 25% to 35% of a filler; the tread cleaning block comprises, by weight percentage, 10% to 15% of a binder, 5% to 10% of reinforcing fiber, 10% to 20% of a friction-increasing material, 15% to 25% of a friction-reducing material and 30% to 60% of a filler.

2. A grinding wheel for a tread cleaning device according to claim 1, characterized in that: The binder of the wheel rim lubrication block, tread shaping block and tread cleaning block is a rubber-modified phenolic resin, and the resin particle size is 200 mesh, the polymerization rate at 150°C is 50-80s, and the fluidity is 15-25mm; the filler of the wheel rim lubrication block, tread shaping block and tread cleaning block is at least one of barite, iron powder, calcium carbonate and diatomaceous earth.

3. The grinding wheel of the tread cleaning device according to claim 1, characterized in that: The reinforcing fibers of the wheel rim lubrication block, the tread shaping block and the tread cleaning block are at least one of carbon fibers, aramid fibers and ceramic fibers.

4. The grinding wheel of the tread cleaning device according to claim 1, characterized in that: The lubricating material of the wheel rim lubricating block is at least one of molybdenum disulfide and flake graphite; the lubricating material contains two powder particle sizes, 100 mesh and 325 mesh, wherein the particle size of molybdenum disulfide is 325 mesh, and the particle size of flake graphite is 100 mesh, and the ratios of the lubricating materials are 1:1, 1:2, and 1:

3.

5. The grinding wheel of the tread cleaning device according to claim 1, characterized in that: The friction-increasing material of the tread shaping block and the tread cleaning block is at least one of brown corundum, alumina, quartz powder and silicon carbide. The friction-increasing material has two powder particle sizes, 50-100 mesh and 200-250 mesh. The ratio of the two powder particle sizes is: the weight ratio of the friction-increasing material with a particle size of 50-100 mesh to the friction-increasing material with a particle size of 100-200 mesh is 1:4-5.

6. The grinding wheel of the tread cleaning device according to claim 1, characterized in that: The anti-friction material of the tread shaping block and the tread cleaning block is at least one of molybdenum disulfide, petroleum coke and graphite. The anti-friction material contains two powder particle sizes, 40 mesh and 1000 mesh, respectively. The particle size of graphite and petroleum coke is 40 mesh, and the particle size of molybdenum disulfide is 1000 mesh. The ratios of the anti-friction materials are 1:3, 1:2 and 2:

1.

7. The method for preparing a grinding wheel for a tread cleaning device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Pre-treating the reinforcing fibers; performing an opening treatment on the carbon fibers and / or aramid fibers, wherein the opening treatment time is 5-10 minutes; S2. Mixing: using a mixer, materials are mixed according to the component formula ratio of the wheel rim lubrication block, the tread shaping block and the tread cleaning block respectively, and the mixing time is 30-60 minutes to obtain three mixed materials; S3, pressurizing the mixture; putting the three dried mixtures into a mold, pressurizing them by a hot press, controlling the hot pressing temperature at 130-150° C., pressurizing for 25-40 minutes under a pressurizing process of 10-24 MPa, and obtaining the first hot-pressed product after complete pressure release; S4, performing variable temperature curing on the first product; placing the first product in a curing furnace for temperature-raising curing, and obtaining a second product after curing is completed; S5. Paint the product; immerse the second product with a surface temperature of 25-35°C in the paint for 8-15s, and dry it at 145-155°C to obtain the finished product.

8. The method for preparing a grinding wheel for a tread cleaning device according to claim 7, characterized in that: When mixing in S2, the pre-opened fibers are first mixed with a portion of the filler, and then the remaining materials are added and mixed together.

9. The method for preparing a grinding wheel for a tread cleaning device according to claim 7, characterized in that: When the mixture is pressurized in S3, the three dried mixtures are loaded into the mold. When loading, different types of mixtures are separated by baffles. The baffles are removed after all the mixtures are added. The hot press is started, and the hot pressing temperature is controlled at 130-150°C. The pressing is performed according to the multiple pressure-increasing process: the molding pressure is applied 5 times in total, i.e. 16MPa→18MPa→20MPa→22MPa→24MPa; each pressure application lasts for 60s, and the deflation time is 20s. After applying the molding pressure 5 times, the holding pressure is set to 20MPa for 800s. The deflation time and molding temperature parameters are the same. After the pressure is completely released, the first product is obtained.

10. The method for preparing a grinding wheel for a tread cleaning device according to claim 7, characterized in that: When the first product is subjected to variable temperature curing in S4, the first product is placed in a curing furnace and cured by heating according to the following process: room temperature to 60°C for 1 hour, 60 to 90°C for 2 hours, 90 to 130°C for 4 hours, 130 to 160°C for 6 hours and 160-180°C for 2 hours, and then naturally cooled to a temperature below 40°C.

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