Self-lubricating pore-forming filler for resin-based grinding wheel and preparation method of self-lubricating pore-forming filler

Abstract

The invention discloses a self-lubricating pore-forming filler for a resin-based grinding wheel and a preparation method of the self-lubricating pore-forming filler, and relates to the field of grinding wheels, the self-lubricating pore-forming filler comprises a reinforcement body and a lubricating core, the lubricating core is embedded in the reinforcement body, the lubricating core is a self-lubricating material, and the reinforcement body is prepared from one or two of a pore-forming material and an adhesive; the pore-forming material comprises one or more of carbamide, ammonium bicarbonate, polymethyl methacrylate and a foaming agent. The self-lubricating pore-forming filler is used in the grinding wheel, so that the grinding wheel can reduce the grinding heat generated in the using process from the two aspects of lubricating and cooling at the same time.

Description

Technical Field

[0001] This application relates to the field of grinding wheel manufacturing, and particularly to a self-lubricating pore-forming filler for resin-based grinding wheels and a preparation method thereof. Background Art

[0002] During the maintenance of rail transit, operations such as rail grinding and cutting are often designed. Through rail grinding, the surface damage after periodic rolling fatigue is repaired, and through rail cutting, the internal stress of the rail is released, thereby realizing the maintenance of the rail and improving the service life of the rail. Resin-based grinding wheels and resin-based cutting wheels are the main grinding and cutting tools. During the grinding and cutting processes, most abrasives cut with a large negative rake angle. Therefore, during the cutting process, a large amount of grinding heat is generated between the abrasive and the workpiece surface, resulting in thermal damage to the workpiece surface, such as burns, tensile residual stress, phase transformation, surface oxidation, etc., and further reducing the service reliability and safety of the ground workpiece. Therefore, controlling the grinding heat during the grinding process is an important means to improve the surface quality of the machined workpiece.

[0003] Currently, lubrication and cooling are the main technical means to reduce grinding heat generation. Therefore, solid lubricating materials such as graphite are directly added to the grinding wheel material, and the lubricating effect of the interface is realized through the release of the solid lubricating material at the grinding wheel / rail contact interface during the processing, which is beneficial to reducing the heat generated by abrasive friction. However, the addition amount of the solid lubricating material significantly affects the mechanical properties of the grinding wheel. Research scholars such as Zhang studied the influence of adding graphite self-lubricating material to the grinding wheel on the mechanical properties of the grinding wheel. The results showed that adding graphite material with a mass fraction of 2% to the grinding wheel could reduce the compressive strength of the grinding wheel by up to 35%. Further increasing the mass fraction of the graphite material, the reduction in the compressive strength of the grinding wheel even exceeded 57%, making it difficult to meet the safety use requirements. It is analyzed that the lamellar structure of the self-lubricating material causes the interfaces of each raw material to slide relative to each other, significantly reducing the strength of the grinding wheel, shortening the service life of the grinding wheel, and posing safety hazards such as grinding wheel breakage. If the proportion of the added solid lubricating material is small, it will be difficult to achieve the interface lubrication effect during the use of the grinding wheel. Summary of the Invention

[0004] In view of the deficiencies of the above-mentioned related technologies, the purpose of this application is to provide a self-lubricating pore-forming filler for resin-based grinding wheels and its preparation method. When the self-lubricating pore-forming filler of this application is used in resin-based grinding wheels, on the one hand, the reinforcing body can wrap the self-lubricating material and withstand the pressure applied in the grinding wheel pressing process without breaking. While reducing the influence of the lamellar structure of the self-lubricating material on the slip of the grinding wheel matrix, it increases the upper limit of the self-lubricating material that can be added while maintaining the strength of the grinding wheel, thereby improving the lubrication effect at the grinding wheel / rail interface during the use of the grinding wheel; on the other hand, during the firing process of the grinding wheel, the pore-forming material decomposes, adding pores to the grinding wheel, which helps to increase the height of the abrasive grains protruding from the bond, improve the cutting efficiency of the grinding wheel, and the pores can effectively accommodate the chips generated after abrasive cutting, timely remove the high-temperature heat source from the contact surface, and reduce the temperature of the contact interface. Under the combined action, using the self-lubricating pore-forming filler is beneficial to reducing the grinding heat generation during the use of the grinding wheel from both lubrication and cooling aspects.

[0005] First, a self-lubricating pore-forming filler for resin-based grinding wheels provided by this application adopts the following technical solutions: A self-lubricating pore-forming filler for resin-based grinding wheels, comprising a reinforcing body and a lubricating core, the lubricating core is embedded in the reinforcing body, the lubricating core is a self-lubricating material, and the reinforcing body is made of one or two of a pore-forming material and a binder; the pore-forming material includes one or more of carbamide, ammonium bicarbonate, polymethyl methacrylate, and foaming agent.

[0006] Preferably, the pore-forming material includes carbamide.

[0007] Preferably, it is made of the following components in parts by weight: 20-30 parts of pore-forming material, 10-20 parts of self-lubricating material, 25-35 parts of binder, and 4-8 parts of reinforcing fiber.

[0008] Preferably, it is made of the following components in parts by weight: 25 parts of pore-forming material, 18 parts of self-lubricating material, 30 parts of binder, and 6 parts of reinforcing fiber.

[0009] Preferably, the particle size of the pore-forming material is 60-200 mesh.

[0010] Preferably, the self-lubricating material includes one or more of graphite, molybdenum disulfide, tungsten sulfide, hexagonal boron nitride, and fluorite.

[0011] Preferably, the self-lubricating material includes graphite and molybdenum disulfide.

[0012] Preferably, the weight ratio of graphite to molybdenum disulfide is 5:4.

[0013] Preferably, the self-lubricating material is in powder form, and its particle size is 200-300 mesh.

[0014] Preferably, the adhesive includes one or more of epoxy resin, polyurethane, acrylic resin, and phenolic resin.

[0015] Preferably, the adhesive includes liquid epoxy resin.

[0016] Preferably, the reinforcing fiber includes one or more of carbon fiber, basalt fiber, aramid fiber, glass fiber, and potassium titanate whisker.

[0017] Preferably, the reinforcing fiber includes aramid fiber.

[0018] In a second aspect, the present application provides a preparation method of a self-lubricating pore-forming filler for a resin-based grinding wheel, adopting the following technical solution: A preparation method of a self-lubricating pore-forming filler for a resin-based grinding wheel, comprising the following steps: S1: Mix the raw materials. When the reinforcing body includes a pore-forming material and an adhesive, a formed block is obtained by curing the adhesive. When the reinforcing body includes a pore-forming material, a formed block is obtained by melting the pore-forming material and then cooling it. S2: Mechanically crush the formed block and then sieve it to obtain self-lubricating pore-forming particles. S3: Surface-modify the self-lubricating pore-forming particles with a silane coupling agent to obtain the self-lubricating pore-forming filler.

[0019] Preferably, the method of curing the adhesive in step S1 includes the following steps: Mix the pore-forming material, self-lubricating material, and reinforcing fiber by ball milling to obtain a solid component. Place the solid component in the adhesive, stir evenly, remove air bubbles, and then cure it at a high temperature to form a formed block. The method of melting the pore-forming material and then cooling it in step S1 includes the following steps: Add the self-lubricating material to the molten pore-forming material, stir evenly, and then cool it to room temperature to form a formed block.

[0020] In a third aspect, the present application provides an application of a self-lubricating pore-forming filler for a resin-based grinding wheel in the preparation of a resin-based grinding wheel.

[0021] An application of a self-lubricating pore-forming filler for a resin-based grinding wheel in the preparation of a resin-based grinding wheel, wherein the addition amount of the self-lubricating pore-forming filler is 10-15% of the total mass of the grinding wheel raw materials, and the temperature during firing of the resin-based grinding wheel is higher than the decomposition temperature of the pore-forming material in the self-lubricating pore-forming filler.

[0022] Preferably, the addition amount of the self-lubricating pore-forming filler is 12.6% of the total mass of the grinding wheel raw materials. In summary, the present application includes at least one of the following beneficial technical effects: 1. When the self-lubricating pore-forming filler of the present application is used in resin-based grinding wheels, the reinforcing body can wrap the self-lubricating material and withstand the pressure applied in the grinding wheel pressing process without breaking. While reducing the influence of the lamellar structure of the self-lubricating material on the slip of the grinding wheel matrix, it increases the upper limit of the self-lubricating material that can be added while maintaining the strength of the grinding wheel, thereby improving the lubrication effect at the grinding wheel / rail interface during the use of the grinding wheel; 2. When the self-lubricating pore-forming filler of the present application is used in resin-based grinding wheels, during the firing process of the grinding wheel, the pore-forming material decomposes, adding pores to the grinding wheel. The pores can effectively accommodate the chips generated after abrasive cutting, timely remove the high-temperature heat source from the contact surface, and reduce the temperature of the contact interface. Under the combined action, using the self-lubricating pore-forming filler is beneficial to reducing the grinding heat generation during the use of the grinding wheel from both lubrication and cooling aspects; 3. When the self-lubricating pore-forming filler of the present application is used in resin-based grinding wheels, during the firing process of the grinding wheel, the pore-forming material decomposes, adding pores to the grinding wheel helps to increase the protrusion height of the abrasive grains and improve the cutting efficiency of the grinding wheel. Description of the Drawings

[0023] Figure 1 is the scanning electron microscope image of the self-lubricating pore-forming filler of Example 1 of the present application; Figure 2 is the scanning electron microscope image of the self-lubricating pore-forming filler of Example 2 of the present application; Figure 3 is the comparison chart of the compressive strength - deformation amount diagrams of the self-lubricating pore-forming fillers of Examples 1 - 3 of the present application; Figure 4 is the thermogravimetric diagram of the self-lubricating pore-forming filler of Example 1 of the present application; Figure 5 is the thermogravimetric diagram of the self-lubricating pore-forming filler of Example 2 of the present application; Figure 6 is the comparison chart of the friction coefficient change over time of the grinding wheels made of the self-lubricating pore-forming fillers of Examples 1 - 3 and Comparative Example 1 of the present application. Detailed Embodiments

[0024] The following further elaborates on the present application in conjunction with the embodiments. The following embodiments are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention. For those not specifying specific conditions in the following embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. The methods used, unless otherwise specified, are all conventional methods well-known in the art. The consumables and reagents used, unless otherwise specified, are all commercially available. Unless otherwise stated, the professional and scientific terms used herein have the same meaning as those familiar to those skilled in the art. In addition, any method or material similar or equivalent to the described content can also be applied to the present invention.

[0025] The raw materials used in the examples and comparative examples can all be obtained commercially.

[0026] Example 1 Example 1 of the present application provides a self-lubricating pore-forming filler for a resin-based grinding wheel, which is prepared by the following steps: S1: According to weight parts, weigh 25 parts of carbon amide, 10 parts of graphite powder, and 8 parts of molybdenum disulfide powder, place them in a ball mill for ball milling mixing and dispersion, the ball mill speed is 300rpm, and the ball-to-material ratio is 1:0.6; the carbon amide particle size is 60-100 mesh, and the graphite powder and molybdenum disulfide particle sizes are 200-300 mesh; weigh 6 parts by weight of aramid fiber, add it into the ball mill and continue to ball milling mixing and dispersion, the ball mill speed is 300rpm, and the ball-to-material ratio is 1:0.6; the aramid fiber has a diameter of 10-50μm and a length of 0.8-3mm; after fully mixing, obtain a solid component; place the solid component in an oven, dry it at 60°C for 24h, and store it in a constant temperature and humidity environment.

[0027] Weigh 30 parts of epoxy resin liquid according to weight, place it in a rotary mixer, rotate at a speed of 350 rpm, stir for 10 minutes each time, then stop stirring for 5 minutes to cool down, add solid components after each cooling and continue stirring, add solid components in four times, mix thoroughly, finally add curing agent, stir for 5 minutes, and rotate at a speed of 400 rpm; vacuum treat the mixed material to discharge bubbles generated during stirring to obtain a filler component; move the filler component into a muffle furnace, keep it at 60°C for 2 hours, raise the temperature to 120°C, the heating rate is 60°C / h, keep it at 120°C for 4 hours, and then cool it to 30°C with the furnace to obtain a molding block; S2: Mechanically crush the forming components and then sieve them to obtain self-lubricating pore-forming particles with a particle size of 16-24 mesh; S3: placing the self-lubricating pore-forming particles in a 3wt% petroleum ether solution of a silane coupling agent, and treating them under an ultrasonic environment for 1.5 hours with continuous stirring; moving the self-lubricating pore-forming particles after ultrasonic treatment into an oven, and drying them at 60°C for 24 hours to obtain a self-lubricating pore-forming filler.

[0028] In this embodiment, the reinforcement of the self-lubricating pore-forming filler is composed of epoxy resin, carbon amide and aramid fiber, and the lubricating core is graphite powder and molybdenum disulfide.

[0029] Example 2 Example 2 of this application provides a self-lubricating pore-forming filler for resin-based grinding wheels. The difference between Example 2 and Example 1 is as follows: The S1 step in Example 2 is as follows: Weigh 8 parts by weight of graphite powder and 6 parts by weight of molybdenum disulfide powder, place them in a ball mill for ball milling, mixing and dispersion. The rotation speed of the ball mill is 300 rpm, and the ball-to-material ratio is 1:0.6. The particle sizes of the graphite powder and molybdenum disulfide are 200 - 300 mesh. After sufficient mixing, a solid component is obtained. The solid component is placed in an oven and heated to 145 °C, and kept in the oven for later use. Weigh 40 parts by weight of carbamide and heat it to 145 °C in the oven. Heat a constant-temperature magnetic stirrer to 145 °C, place the carbamide on the constant-temperature magnetic stirrer, heat and stir until it completely melts to obtain molten carbamide, and keep it rotating at a constant temperature at the melting temperature. Slowly pour the preheated solid component into the molten carbamide in 4 portions, stir for 5 minutes each time after pouring, and fully stir to obtain a mixed component. Place the mixed component in an oven for cooling and forming, with a cooling rate of 0.8 °C / min until room temperature to obtain a formed block.

[0030] In this example, the reinforcing body of the self-lubricating pore-forming filler is carbamide that is melted and then cooled and formed, and the lubricating core is graphite powder and molybdenum disulfide.

[0031] Example 3 Example 3 of this application provides a self-lubricating pore-forming filler for resin-based grinding wheels. The difference between Example 3 and Example 1 is that in the preparation process of Example 3, 30 parts by weight of carbamide, 5 parts by weight of graphite powder, 5 parts by weight of molybdenum disulfide powder, and 4 parts by weight of aramid fiber are used.

[0032] Test and detection (1) Scanning electron microscopy imaging is performed on the self-lubricating pore-forming filler of Example 1, and the obtained scanning electron micrograph is as Figure 1 shown; Scanning electron microscopy imaging is performed on the self-lubricating pore-forming filler of Example 2, and the obtained scanning electron micrograph is as Figure 2 shown.

[0033] (2) Pressure tests are performed on the self-lubricating pore-forming fillers of Examples 1 - 3, and a comparison graph of compressive strength - deformation amount is obtained, as Figure 3 shown.

[0034] (2) Thermogravimetric experiments are performed on the self-lubricating pore-forming filler of Example 1, and the obtained thermogravimetric graph is as Figure 4 shown; Thermogravimetric experiments are performed on the self-lubricating pore-forming filler of Example 2, and the obtained thermogravimetric graph is as Figure 5 shown.

[0035] (3) Using the self-lubricating pore-forming fillers of Examples 1 - 3 as raw materials, resin-based grinding wheels are respectively manufactured. The preparation steps are as follows: By weight, weigh 25 parts of brown fused alumina, 65 parts of zirconium corundum, and 15 parts of cubic boron nitride and mix them; the particle size of brown fused alumina is 24 mesh, the particle size of zirconium corundum is 16 mesh, and the particle size of cubic boron nitride is 24 mesh; feed the abrasives into a mixer and mix for 5 min to achieve sufficient mixing and obtain mixed abrasives; Weigh 20 parts of self-lubricating pore-forming filler particles; the particle size of the self-lubricating pore-forming filler is 16 - 24 mesh; mix the self-lubricating pore-forming filler with the mixed abrasives for 3 min to obtain the abrasive component; Weigh 15 parts of phenolic resin powder, 3 parts of cryolite, 5.5 parts of pyrite, 2 parts of feldspar powder, and 5 parts of precipitated barium sulfate; the particle size of phenolic resin powder is 300 mesh, and the particle size of functional filler is 150 mesh; feed the phenolic resin powder and functional filler into a drum mixer and mix for 5 h to prepare the auxiliary component; Dry the abrasive component and the auxiliary component in an oven at 60 °C for 24 h and store them in a constant temperature and humidity environment for standby; Weigh 3 parts of phenolic resin liquid, add the phenolic resin liquid to the abrasive component and mix well for 5 min; then add the auxiliary component and mix well for 5 min to obtain the mixed component; Sieve the mixed component with a sieve size of 10 mesh to obtain a loose grinding wheel component, and store it in a constant temperature and humidity environment after sieving; Apply a mold release agent to the four sides of the mold, place an iron matrix at the bottom of the mold, and add the grinding wheel component in 3 times according to the required proportion of the grinding wheel; level the grinding wheel component after each addition; after adding, rotate and level the grinding wheel component; after leveling, cover the upper mold and compact it with a pressure of 10 MPa and hold the pressure for 30 s to obtain a formed grinding wheel sample; heat press and sinter the formed grinding wheel sample at a pressure of 10 MPa and a temperature of 130 °C for 50 min; finally, preheat the muffle furnace to 50 °C, put the heat-pressed and sintered formed grinding wheel sample into the muffle furnace for high-temperature hardening, and the high-temperature hardening heating curve is: keep the temperature at 50 °C for 2 h, raise the temperature to 100 °C at a heating rate of 50 °C / h, keep the temperature at 100 °C for 1 h, raise the temperature to 130 °C at a heating rate of 30 °C / h, keep the temperature at 130 °C for 2 h, raise the temperature to 185 °C at a heating rate of 27.5 °C / h, keep the temperature at 185 °C for 3 h, and then cool it in the furnace to 30 °C to obtain a resin-based grinding wheel.

[0036] The resin-based grinding wheel prepared by the above steps without adding self-lubricating pore-forming filler was used as the control group. A small rail grinding machine was used to test the grinding performance of the resin-based grinding wheels made of the self-lubricating pore-forming fillers of Examples 1-3 and the resin-based grinding wheel of the control group respectively. The grinding piece was a 60-rail, and the material of the 60-rail was U71Mn rail steel. The comparison chart of the friction coefficient of the resin-based grinding wheels made of the self-lubricating pore-forming fillers of Examples 1-3 and the resin-based grinding wheel of the control group changing with time is as Figure 6 shown.

[0037] Result analysis The following will Figures 1 - 6 describe the present application in detail in combination with the

[0038] experimental results. Figure 1 and Figure 2 referring to

[0039] and Figure 3 , the self-lubricating pore-forming fillers of the resin-based grinding wheels prepared in Examples 1 and 2 can still maintain the lamellar structure of the solid self-lubricating material, ensuring the solid characteristics of the material lubrication. At the same time, the two reinforcing bodies have good coating properties for the self-lubricating material, which is beneficial to reducing the negative impact of the lubricating material on the resin-based grinding wheel matrix during the subsequent production of the resin-based grinding wheel.

[0040] Referring to Figure 4 and Figure 5 , the self-lubricating pore-forming fillers of the resin-based grinding wheels prepared in Examples 1 and 2 can be effectively decomposed, and have similar decomposition rates at the grinding wheel forming and hardening temperatures, and the residual amounts after decomposition are similar, ensuring the smooth decomposition of the pore-forming components and the smooth release of the self-lubricating components during the firing and hardening process of the grinding wheel. Figure 4 In

[0041] , the reason for the thermal gravity step change between 200-250 °C is that a small part of the material will condense to form biuret with a higher decomposition temperature during the melting process of the carbamide in Example 2, and the decomposition rate of biuret is lower at the same temperature, resulting in a change in the overall decomposition rate. Figure 6, the mass proportion of the self-lubricating material in the resin-based grinding wheel made from the self-lubricating pore-forming filler of Example 1 reaches 2.87%. Among them, the mass proportion of the self-lubricating material in the resin-based grinding wheel made from the self-lubricating pore-forming filler of Example 2 reaches 3.26%. Among them, the mass proportion of the self-lubricating material in the resin-based grinding wheel made from the self-lubricating pore-forming filler of Example 3 reaches 1.7%. Compared with the resin-based grinding wheel of the control group, the friction coefficient of the resin-based grinding wheel made from the self-lubricating pore-forming fillers of Examples 1-3 decreases significantly. Moreover, the friction coefficient of the resin-based grinding wheel made from the self-lubricating pore-forming filler of Example 1 is lower than that of the resin-based grinding wheels made from the self-lubricating pore-forming fillers of Examples 2 and 3. On the one hand, the analysis is that the content of the self-lubricating material in the resin-based grinding wheel made from the self-lubricating pore-forming filler of Example 1 is higher than that in the resin-based grinding wheel made from the self-lubricating pore-forming filler of Example 3, which is beneficial to improving the lubrication effect at the grinding wheel / rail interface during the use of the grinding wheel. On the other hand, referring to Figure 3 , the compressive strength of the reinforcement of the self-lubricating pore-forming filler of Example 2 is weaker than that of the self-lubricating pore-forming filler of Example 1. During pressing, it is prone to deformation and fragmentation, resulting in the premature release of some self-lubricating materials, reducing the stability of each component during the forming process of the grinding wheel, and causing the friction coefficient of the grinding wheel made from the self-lubricating pore-forming filler of Example 2 to be lower than that of the resin-based grinding wheel made from the self-lubricating pore-forming filler of Example 1.

[0042] This specific embodiment is only an interpretation of the present application and is not a limitation thereof. Those skilled in the art can make modifications without creative contributions to this embodiment as needed after reading this specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A self-lubricating pore-forming filler for a resin-based grinding wheel, characterized in that: It includes a reinforcement body and a lubricating core, wherein the lubricating core is embedded in the reinforcement body, the lubricating core is a self-lubricating material, and the reinforcement body is made of one or two of a pore-forming material and an adhesive; the pore-forming material includes one or more of carbonamide, ammonium bicarbonate, polymethyl methacrylate, and a foaming agent.

2. The self-lubricating pore-forming filler for a resin-based grinding wheel according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 20-30 parts of pore-forming material, 10-20 parts of self-lubricating material, 25-35 parts of adhesive and 4-8 parts of reinforcing fiber.

3. The self-lubricating pore-forming filler for a resin-based grinding wheel according to claim 1, characterized in that: The particle size of the pore-forming material is 60-200 meshes.

4. The self-lubricating pore-forming filler for a resin-based grinding wheel according to claim 1, characterized in that: The self-lubricating material includes one or more of graphite, molybdenum disulfide, tungsten sulfide, hexagonal boron nitride, and fluorite.

5. The self-lubricating pore-forming filler for a resin-based grinding wheel according to claim 1, characterized in that: The self-lubricating material is in powder form, and its particle size is 200-300 meshes.

6. The self-lubricating pore-forming filler for a resin-based grinding wheel according to claim 1, characterized in that: The adhesive includes one or more of epoxy resin, polyurethane, acrylic resin, and phenolic resin.

7. The self-lubricating pore-forming filler for a resin-based grinding wheel according to claim 2, characterized in that: The reinforcing fibers include one or more of carbon fibers, basalt fibers, aramid fibers, glass fibers, and potassium titanate whiskers.

8. A method for preparing the self-lubricating pore-forming filler for resin-based grinding wheels according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: mixing the raw materials, and when the reinforcement includes a pore-forming material and an adhesive, curing the adhesive to obtain a formed block; when the reinforcement includes a pore-forming material, melting the pore-forming material and then cooling the pore-forming material to obtain a formed block; S2: Mechanically crushing the formed blocks and sieving them to obtain self-lubricating pore-forming particles; S3: using a silane coupling agent to perform surface modification on the self-lubricating pore-forming particles to obtain the self-lubricating pore-forming filler.

9. The method for preparing a self-lubricating pore-forming filler for a resin-based grinding wheel according to claim 8, characterized in that: The method of curing with an adhesive in step S1 includes the following steps: mixing and ball-milling the pore-forming material, the self-lubricating material and the reinforcing fiber to obtain a solid component, placing the solid component in an adhesive, stirring it evenly and removing bubbles, and then curing it at high temperature to obtain a formed block; The method of cooling the pore-forming material after melting in step S1 includes the following steps: adding the self-lubricating material to the molten pore-forming material, stirring evenly, and then cooling to room temperature to form a formed block.

10. Use of the self-lubricating pore-forming filler for resin-based grinding wheels according to any one of claims 1 to 7 in the preparation of resin-based grinding wheels, characterized in that: The addition amount of the self-lubricating pore-forming filler is 10-15% of the total mass of the grinding wheel raw material. The temperature of the resin-based grinding wheel during firing is higher than the decomposition temperature of the pore-forming material in the self-lubricating pore-forming filler.

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