Preparation method of elastic and efficient grinding tool special for metal polishing

Abstract

The invention discloses a preparation method of an elastic and efficient grinding tool special for metal polishing, and relates to the technical field of grinding tools, primer materials comprise water-soluble phenolic resin, filler, a penetrating agent, a reinforcing agent, a dispersing agent and a solvent; the composite sizing material comprises water-soluble phenolic resin, a filler, an abrasive material, a leveling agent, a reinforcing agent, a pigment, a dispersing agent and a solvent. According to the preparation method of the elastic and efficient grinding tool special for metal polishing, elastic particles formed after oak bark is smashed are added in the production process of the grinding tool, hard contact between the grinding tool and a workpiece can be converted into soft contact, a buffering effect can be provided in the grinding process through the elasticity of the cork particles, and therefore the grinding tool is prevented from being damaged. The phenomenon that the surface of a workpiece is burnt due to too large grinding force or poor heat dissipation is reduced, meanwhile, elastic contact of the cork particles facilitates pressure dispersion, local overheating is prevented, heat can be dissipated, and the situation that local overheating occurs during grinding is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of abrasive tools, and more particularly to a method for preparing a special elastic and efficient abrasive tool for metal polishing. Background Art

[0002] For products in the automotive engine valve field and other metal fine polishing fields, since the use scenarios require higher smoothness to reduce adverse conditions during use, there are corresponding high requirements for surface finish, roughness, and surface quality. Polishing tools are devices used to polish the surface of metal products. Conventional metal polishing products include nylon sandpaper, stacked abrasives, soft cloth, etc.

[0003] Current metal polishing products still have the following problems when grinding the surface of workpieces:

[0004] 1. When high-speed grinding is performed, high temperature heat will be generated at the grinding site. Especially when local grinding is performed, the grinding tool and the workpiece are in hard contact and the contact area is small. The heat at the grinding site cannot be effectively dissipated to the surroundings, which will cause high-temperature burns on the workpiece. High-temperature burns will not only affect the dimensional accuracy and surface quality of the workpiece, but also cause thermal expansion of the workpiece, resulting in changes in the geometric shape. This deformation is more obvious in precision machining. In addition, during grinding, the workpiece will undoubtedly produce slight vibrations, which will cause the contact between the grinding tool and the workpiece to become unstable, thereby affecting the surface finish and surface quality.

[0005] 2. The abrasive tools used for metal polishing are nylon sandpaper or soft cloth. Since nylon sandpaper does not have a thick abrasive layer, the abrasive particles will not break to produce new cutting edges, so that the entire workpiece can only be ground by the abrasive on the surface of the abrasive tool. At present, the abrasive on the surface of the abrasive tool has low hardness and cannot be effectively ground. Although the grinding efficiency can be improved by using abrasives with high hardness, the abrasive will fall off during grinding due to the abrasive being too hard, thereby reducing the grinding efficiency.

[0006] Therefore, it is necessary to propose a preparation method of a special elastic and efficient metal polishing abrasive tool to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to solve the problems raised in the above background technology, and to provide a method for preparing a flexible and efficient abrasive tool specially used for metal polishing.

[0008] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0009] A method for preparing a special elastic and efficient abrasive tool for metal polishing, wherein the materials of the abrasive tool include: a base rubber material, a composite rubber material and a base material finished product, and the composition of each material is as follows;

[0010] The proportions of the base rubber are: 50-55% water-soluble phenolic resin, 40-55% filler, 0.5-1% penetrant, 0.5-1.5% reinforcing agent, 0.5-2% dispersant, 1-2% solvent;

[0011] The proportions of the composite material are: water-soluble phenolic resin 40-55%, filler 10-15%, abrasive 30-45%, leveling agent 0.5-1.5%, reinforcing agent 0.5-1%, pigment 0.5-1%, dispersant 0.5-2%, solvent 1-2%;

[0012] The method for preparing a special elastic and efficient metal polishing abrasive tool comprises the following steps:

[0013] S1. Primer coating: Mix the above primer materials evenly and coat them at a rate of 75-400g / m 2 Evenly apply on the finished substrate. The base glue temperature during application is 38-42℃ and the viscosity is 1500-2000mpa·s.

[0014] S2. Gravity sand planting: The elastic cork particles are attached to the base glue by gravity sand planting. The sand planting process is: the sand planting gap is 1500-3500μm, and the sand planting amount is 50-120g / ㎡;

[0015] S3, primary drying: dry the sandpaper after gravity sand planting for the first time, and dry it step by step at 60 / 75 / 100℃, dry it for 20min at each temperature, and the total drying time is 60min;

[0016] S4. Applying a layer of adhesive containing diamond abrasive on the substrate after the first drying. The base adhesive temperature during coating is 38-42℃ and the coating amount is 300-800g / m 2 , viscosity is 500-1700mpa·s;

[0017] S5. Secondary drying: Dry the coated substrate product for the second time at 65 / 75 / 85 / 100 / 115℃, with each temperature drying for 25min, and the total drying time is 125min;

[0018] S6, curing: curing the hot-wound product at 105-130°C for 2-5h;

[0019] S7. Flexing: The cured product is subjected to mechanical flexing at 45° and 90° directions, the diameter of the bending knife is 20-30mm, and the bending pressure is 3-6bar, to obtain a finished metal polishing abrasive.

[0020] Preferably, in the base glue: the filler is one of chalk or wollastonite or a mixture of the two; the penetrant is fatty alcohol polyoxyethylene ether; the enhancer is aminopropyltetraethoxysilane; the dispersant is a polyacrylate copolymer solution; and the solvent is water or propylene glycol methyl ether.

[0021] Preferably, in the composite rubber material: the filler is one or a mixture of chalk, wollastonite, cryolite, potassium fluoroborate, sodium fluoroborate; the leveling agent is one or a mixture of polyether polyester modified organic siloxane, polyphenyl methyl siloxane, organic modified polysiloxane; the reinforcing agent is aminopropyltetraethoxysilane; the pigment is a water-soluble black pigment; the emulsifier is polyglycerol fatty acid ester; the solvent is water or propylene glycol methyl ether; and the abrasive is 500-1500 mesh diamond micropowder abrasive.

[0022] Preferably, the materials of the finished substrate include: impregnation material, back-scraping material and substrate, and the components of each material are as follows;

[0023] The proportions of the impregnating materials are as follows: 10-35% water-soluble phenolic resin, 20-30% polyvinyl acetate emulsion, 5-15% polyvinyl alcohol, 5-15% styrene-butadiene latex, 15-25% filler, 0.5-1% penetrant, 0.5-1% defoamer, 1-2% dispersant, and 1-2% solvent;

[0024] The proportions of the back-scraping material are: 20-35% water-soluble phenolic resin, 10-25% styrene-butadiene latex, 22.5-58.5% filler, 0.5-1% defoamer, 1-2% dispersant, and 1-2% solvent;

[0025] The base material is one of polyester cloth, pure cotton cloth or polyester-cotton blended cloth;

[0026] The preparation of the substrate finished product comprises the following steps:

[0027] S1. Shaping process: fix the substrate on a sandpaper forming machine for shaping, the shaping temperature is 220°C, the shaping tension is 650-750N, and the shaping time is 2-4 minutes;

[0028] S2, impregnation process: the above impregnation materials are uniformly mixed, and the mixed impregnation materials are impregnated into the formed substrate, and the impregnation material coating amount is 30-100g / m 2 The viscosity of the impregnating material is 100-600mpa·s. After impregnation, the impregnation and drying are carried out at 160 / 170 / 180 / 190℃, and each temperature is used for 3min.

[0029] S3, back scraping slurry: the above back scraping materials are mixed evenly, and the mixed back scraping materials are scraped onto the back of the cloth base with a scraper, and the back scraping material coating amount is 70-150g / m 2The viscosity of the back-scrape material is 1000-1500mpa·s. After the back-scrape material is coated, the temperature is 120 / 150 / 180℃, and the back-scrape material is dried for 3 minutes at each temperature;

[0030] S4. Front side grinding: The front side of the back-scraped substrate is sequentially ground through four passes of a grinder equipped with 240#, 320#, 400#, and 400# abrasive belts. The grinding pressure is 200N. After grinding, the finished substrate is obtained.

[0031] Preferably, in the impregnating material: the filler is wollastonite or calcium carbonate; the penetrant is fatty alcohol polyoxyethylene ether; the defoamer is polyether-modified silicone oil; the dispersant is polyacrylate copolymer solution; and the solvent is water.

[0032] Preferably, in the back-scrape material: the filler is one or two of chalk or light calcium carbonate; the defoamer is polyether-modified silicone oil; the dispersant is a polyacrylate copolymer solution; and the solvent is water.

[0033] Preferably, the unit weight of the substrate is 200-600 g / m 2 , the substrate width is 1350-1650mm.

[0034] Preferably, the elastic cork particles in the gravity sand planting in step S2 are elastic particles formed by crushing oak bark.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. By adding elastic particles formed by crushing oak bark during the production process of the abrasive tool, the hard contact between the abrasive tool and the workpiece can be converted into soft contact. By utilizing the elasticity of cork particles, a buffering effect can be provided during the grinding process to reduce the surface burns of the workpiece caused by excessive grinding force or poor heat dissipation. At the same time, the elastic contact of cork particles helps to disperse pressure, prevent local overheating, and dissipate heat, thereby reducing local overheating during grinding.

[0037] 2. By coating the well-formed elastic cork particles with a compound containing diamond abrasives, the cutting ability and durability of the abrasive tool can be improved, which not only improves the grinding efficiency, reduces the frequency of replacing the abrasive tool, but also reduces the production cost. Moreover, during grinding, the elastic cork particles at the bottom have elasticity, which can prevent the abrasive from falling off, thereby increasing the number of grindings on the abrasive tool and increasing its service life. DETAILED DESCRIPTION

[0038] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Embodiment 1:

[0040] The proportions of the base rubber are as follows: 54% water-soluble phenolic resin, 40% wollastonite as filler, 1% penetrant as fatty alcohol polyoxyethylene ether, 1% reinforcing agent as aminopropyltetraethoxysilane, 2% dispersant as ethylene-vinyl acetate copolymer, and 2% solvent as water;

[0041] The proportions of the composite material are as follows: 30% of the water-soluble phenolic resin is silicone-modified water-soluble phenolic resin, 8% of the filler is a mixture of wollastonite, cryolite and potassium fluoroborate, with a ratio of 1:3:3, 55% of the abrasive is 1200 mesh diamond powder, 1% of the leveling agent is polydimethylsiloxane, 1% of the reinforcing agent is aminopropyltetraethoxysilane, 1% of the pigment is water-based black pigment, 2% of the dispersant is ethylene-vinyl acetate copolymer, and 2% of the solvent is water;

[0042] A method for preparing a grinding tool comprises the following steps:

[0043] S1. Primer coating: Mix the above primer materials evenly and coat them at a rate of 250g / m 2 Evenly apply on the finished substrate, the primer temperature during coating is 40°C and the viscosity is 1500mpa·s;

[0044] S2. Gravity sand planting: The elastic cork particles are attached to the base glue by gravity sand planting. The sand planting process is: the sand planting gap is 2000μm, and the sand planting amount is 85g / ㎡;

[0045] S3, primary drying: dry the sandpaper after gravity sand planting for the first time, and dry it step by step at 60 / 75 / 100℃, dry it for 20min at each temperature, and the total drying time is 60min;

[0046] S4, coating: a layer of coating containing diamond abrasive is applied on the substrate after the first drying. The base glue temperature during coating is 40℃ and the coating amount is 600g / m 2 , viscosity is 1000mpa·s;

[0047] S5. Secondary drying: Dry the coated substrate product for the second time at 65 / 75 / 85 / 100 / 115℃, with each temperature drying for 25min, and the total drying time is 125min;

[0048] S6, curing: curing the hot-wound product at 115°C for 3.5h;

[0049] S7. Flexing: The cured product is subjected to mechanical flexing at 45° and 90° directions, the diameter of the bending knife is 25mm, and the bending pressure is 5bar, to obtain a finished metal polishing abrasive.

[0050] The components of the materials of the finished substrate are as follows;

[0051] Impregnation material: 23% water-soluble phenolic resin, 30% polyvinyl acetate emulsion, 10% polyvinyl alcohol, 10% styrene-butadiene latex, 20% filler is calcium carbonate, 1% penetrant is fatty alcohol polyoxyethylene ether, 1% defoamer is polyoxypropylene glycerol ether, 2% dispersant is ethylene-vinyl acetate copolymer, and 3% solvent is water;

[0052] Back scraping material: 34% water-soluble phenolic resin, 20% styrene-butadiene latex, 40% filler is light calcium carbonate, 1% defoamer is polyoxypropylene glycerol ether, 2% dispersant is ethylene-vinyl acetate copolymer, and 3% solvent is water;

[0053] The base material is single weight 360g / m 2 Polyester cloth, width is 1400mm;

[0054] The preparation of the substrate finished product comprises the following steps:

[0055] S1. Shaping process: fix the substrate on a sandpaper forming machine for shaping, the shaping temperature is 220°C, the shaping tension is 700N, and the shaping time is 3 minutes;

[0056] S2, impregnation process: the above impregnation materials are uniformly mixed, and the mixed impregnation materials are impregnated into the formed substrate. The impregnation material coating amount is 70g / m 2 The viscosity of the impregnating material is 200mpa·s. After impregnation, the impregnation and drying are carried out at 160 / 170 / 180 / 190℃, and each temperature is used for 3min.

[0057] S3, back scraping slurry: the above back scraping materials are mixed evenly, and the mixed back scraping materials are scraped onto the back of the cloth base with a scraper, and the back scraping material coating amount is 120g / m 2 The viscosity of the back-scrape material is 1500mpa·s. After the back-scrape material is coated, the back-scrape material is dried at 120 / 150 / 180°C for 3 minutes at each temperature.

[0058] S4. Front side grinding: The front side of the back-scraped substrate is sequentially ground through four passes of a grinder equipped with 240#, 320#, 400#, and 400# abrasive belts. The grinding pressure is 200N. After grinding, the finished substrate is obtained.

[0059] Embodiment 2:

[0060] The proportions of the composite material are as follows: 40% of the water-soluble phenolic resin is silicone-modified water-soluble phenolic resin, 13% of the filler is a mixture of wollastonite, cryolite and potassium fluoroborate, with a ratio of 1:3:3, 40.5% of the abrasive is 1200 mesh diamond powder, 1% of the leveling agent is polydimethylsiloxane, 1% of the reinforcing agent is aminopropyltetraethoxysilane, 1% of the pigment is water-based black pigment, 1.5% of the dispersant is ethylene-vinyl acetate copolymer, and 2% of the solvent is water.

[0061] The difference between Example 2 and Example 1 is that the proportions of the various components in the compound glue are changed, and the preparation methods of the remaining abrasive tools and the preparation methods of the substrate finished product remain the same as the steps of Example 1.

[0062] Embodiment 3:

[0063] The proportions of the base rubber are as follows: 45% water-soluble phenolic resin, 49% wollastonite filler, 1% penetrant fatty alcohol polyoxyethylene ether, 1% reinforcing agent aminopropyltetraethoxysilane, 2% dispersant ethylene-vinyl acetate copolymer, and 2% solvent water.

[0064] The difference between Example 3 and Example 1 is that the proportions of the components in the base glue are changed, and the preparation methods of the remaining abrasive tools and the preparation methods of the finished substrate remain the same as the steps of Example 1.

[0065] Comparative Example:

[0066] The proportions of the base rubber are as follows: 54% water-soluble phenolic resin, 40% wollastonite as filler, 1% penetrant as fatty alcohol polyoxyethylene ether, 1% reinforcing agent as aminopropyltetraethoxysilane, 2% dispersant as ethylene-vinyl acetate copolymer, and 2% solvent as water;

[0067] The proportions of the composite material are as follows: 30% of the water-soluble phenolic resin is silicone-modified water-soluble phenolic resin, 8% of the filler is a mixture of wollastonite, cryolite and potassium fluoroborate, with a ratio of 1:3:3, 55% of the abrasive is 1200 mesh silicon carbide, 1% of the leveling agent is polydimethylsiloxane, 1% of the reinforcing agent is aminopropyltetraethoxysilane, 1% of the pigment is water-based black pigment, 2% of the dispersant is ethylene-vinyl acetate copolymer, and 2% of the solvent is water;

[0068] A method for preparing a grinding tool comprises the following steps:

[0069] S1. Primer coating: Mix the above primer materials evenly and coat them at a rate of 250g / m 2Evenly apply on the finished substrate, the primer temperature during coating is 40°C and the viscosity is 1500mpa·s;

[0070] S2. Gravity sand planting: The diamond abrasive is attached to the base glue by gravity sand planting. The sand planting process is: the sand planting gap is 2000μm, and the sand planting amount is 55g / ㎡;

[0071] S3, primary drying: dry the sandpaper after gravity sand planting for the first time, and dry it step by step at 60 / 75 / 100℃, dry it for 20min at each temperature, and the total drying time is 60min;

[0072] S4. Applying a layer of adhesive: Apply a layer of adhesive on the substrate after the first drying. The base adhesive temperature during coating is 40°C and the coating amount is 600g / m 2 , viscosity is 1000mpa·s;

[0073] S5. Secondary drying: Dry the coated substrate product for the second time at 65 / 75 / 85 / 100 / 115℃, with each temperature drying for 25min, and the total drying time is 125min;

[0074] S6, curing: curing the hot-wound product at 115°C for 3.5h;

[0075] S7. Flexing: The cured product is subjected to mechanical flexing at 45° and 90° directions, the diameter of the bending knife is 20-30mm, and the bending pressure is 3-6bar, to obtain a finished metal polishing abrasive.

[0076] The difference between the comparative example and Example 1 is that the diamond powder in the compound glue is replaced with ordinary silicon carbide of the same mass and mesh size, the elastic cork particles in the production steps are removed, and the amount of sand planting is adaptively adjusted. The remaining base glue components, the preparation method of the abrasive tool and the preparation method of the substrate product remain the same as the steps and methods of Example 1.

[0077] The following is a comparative analysis of Example 1, Example 2, Example 3 and the comparative example:

[0078] Under the same parameters, the grinding quantity, roughness after grinding, grinding time and surface conditions of Example 1, Example 2, Example 3 and the comparative example were compared respectively.

[0079] Table 1 Performance comparison

[0080]

[0081] It can be seen from Table 1 that the parameters of Example 1, Example 2 and Example 3 using elastic cork particles and diamond abrasives are better than those of the comparative example, and when the workpiece is ground, the surface finish is good, and there is no burning like the comparative example, so the workpiece is avoided from being deformed by heat. The number of workpieces ground and the grinding time of Example 1 are better than those of Example 2 and Example 3, because the abrasive of Example 2 is reduced, so that the compressive deformation capacity of the grinding tool is enhanced, thereby improving the roughness after grinding, but due to the corresponding increase of the water-soluble phenolic resin, the bonding between the abrasive particles is not tight enough, thereby affecting the overall hardness and wear resistance, thereby reducing the number of workpieces ground and the grinding time.

[0082] The use of elastic cork particles can improve the roughness and grinding time after grinding. By utilizing the elasticity of cork particles, a buffering effect can be provided during the grinding process, reducing the surface burn of the workpiece caused by excessive grinding force or poor heat dissipation. At the same time, adding diamond abrasives to the compound glue can increase the grinding performance of the abrasive tool, thereby increasing the number of workpieces ground. It can be seen that by adding elastic cork particles and diamond abrasives during the production of abrasive tools, the number of workpieces ground, the roughness and the grinding time can be increased without causing the workpiece to burn.

Claims

1. A method for preparing a flexible and efficient abrasive tool for metal polishing, characterized in that: The materials of abrasive tools include: base rubber, over-sizing material and base material finished product. The composition of each material is as follows; The proportions of the base rubber are: 50-55% water-soluble phenolic resin, 40-55% filler, 0.5-1% penetrant, 0.5-1.5% reinforcing agent, 0.5-2% dispersant, 1-2% solvent; The proportions of the composite material are: water-soluble phenolic resin 40-55%, filler 10-15%, abrasive 30-45%, leveling agent 0.5-1.5%, reinforcing agent 0.5-1%, pigment 0.5-1%, dispersant 0.5-2%, solvent 1-2%; The method for preparing a special elastic and efficient metal polishing abrasive tool comprises the following steps: S1. Primer coating: Mix the above primer materials evenly and coat them at a rate of 75-400g / m 2 Evenly apply on the finished substrate. The base glue temperature during coating is 38-42℃ and the viscosity is 1500-2000mpa·s. S2. Gravity sand planting: The elastic cork particles are attached to the base glue by gravity sand planting. The sand planting process is: the sand planting gap is 1500-3500μm, and the sand planting amount is 50-120g / ㎡; S3, primary drying: dry the sandpaper after gravity sand planting for the first time, and dry it step by step at 60 / 75 / 100℃, dry it for 20min at each temperature, and the total drying time is 60min; S4. Applying a layer of adhesive containing diamond abrasive on the substrate after the first drying. The base adhesive temperature during coating is 38-42℃ and the coating amount is 300-800g / m 2 , viscosity is 500-1700mpa·s; S5. Secondary drying: Dry the coated substrate product for the second time at 65 / 75 / 85 / 100 / 115℃, with each temperature drying for 25min, and the total drying time is 125min; S6, curing: curing the hot-wound product at 105-130°C for 2-5h; S7. Flexing: The cured product is subjected to mechanical flexing at 45° and 90° directions, the diameter of the bending knife is 20-30mm, and the bending pressure is 3-6bar, to obtain a finished metal polishing abrasive.

2. The method for preparing a special elastic and efficient metal polishing abrasive tool according to claim 1, characterized in that: In the base glue material: the filler is one of chalk or wollastonite or a mixture of the two; the penetrant is fatty alcohol polyoxyethylene ether; the reinforcing agent is aminopropyltetraethoxysilane; the dispersant is a polyacrylate copolymer solution; and the solvent is water or propylene glycol methyl ether.

3. The method for preparing a special elastic and efficient metal polishing abrasive tool according to claim 1, characterized in that: In the composite rubber material, the filler is one or a mixture of chalk, wollastonite, cryolite, potassium fluoroborate and sodium fluoroborate; the leveling agent is one or a mixture of polyether polyester modified organic siloxane, polyphenyl methyl siloxane and organic modified polysiloxane; the reinforcing agent is aminopropyl tetraethoxy silane; the pigment is a water-soluble black pigment; the emulsifier is polyglycerol fatty acid ester; the solvent is water or propylene glycol methyl ether; and the abrasive is a 500-1500 mesh diamond micro powder abrasive.

4. The method for preparing a flexible and efficient metal polishing abrasive tool according to claim 1, characterized in that: The materials of the finished substrate include: impregnation material, back-scraping material and substrate, and the components of each material are as follows; The proportions of the impregnating materials are as follows: 10-35% water-soluble phenolic resin, 20-30% polyvinyl acetate emulsion, 5-15% polyvinyl alcohol, 5-15% styrene-butadiene latex, 15-25% filler, 0.5-1% penetrant, 0.5-1% defoamer, 1-2% dispersant, and 1-2% solvent; The proportions of the back-scraping material are: 20-35% water-soluble phenolic resin, 10-25% styrene-butadiene latex, 22.5-58.5% filler, 0.5-1% defoamer, 1-2% dispersant, and 1-2% solvent; The base material is one of polyester cloth, pure cotton cloth or polyester-cotton blended cloth; The preparation of the substrate finished product comprises the following steps: S1. Shaping process: fix the substrate on a sandpaper forming machine for shaping, the shaping temperature is 220°C, the shaping tension is 650-750N, and the shaping time is 2-4 minutes; S2, impregnation process: the above impregnation materials are uniformly mixed, and the mixed impregnation materials are impregnated into the formed substrate, and the impregnation material coating amount is 30-100g / m 2 The viscosity of the impregnating material is 100-600mpa·s. After impregnation, the impregnation and drying are carried out at 160 / 170 / 180 / 190℃, and each temperature is used for 3min. S3, back scraping slurry: the above back scraping materials are mixed evenly, and the mixed back scraping materials are scraped onto the back of the cloth base with a scraper, and the back scraping material coating amount is 70-150g / m 2 The viscosity of the back-scrape material is 1000-1500mpa·s. After the back-scrape material is coated, the temperature is 120 / 150 / 180℃, and the back-scrape material is dried for 3 minutes at each temperature; S4. Front side grinding: The front side of the back-scraped substrate is sequentially ground through four passes of a grinder equipped with 240#, 320#, 400#, and 400# abrasive belts. The grinding pressure is 200N. After grinding, the finished substrate is obtained.

5. The method for preparing a special elastic and efficient metal polishing abrasive tool according to claim 4, characterized in that: In the impregnating material: the filler is wollastonite or calcium carbonate; the penetrant is fatty alcohol polyoxyethylene ether; the defoamer is polyether modified silicone oil; the dispersant is polyacrylate copolymer solution; and the solvent is water.

6. The method for preparing a special elastic and efficient metal polishing abrasive tool according to claim 4, characterized in that: In the back-scraping material: the filler is one or two of chalk or light calcium carbonate; the defoamer is polyether-modified silicone oil; the dispersant is a polyacrylate copolymer solution; and the solvent is water.

7. The method for preparing a special elastic and efficient metal polishing abrasive tool according to claim 4, characterized in that: The unit weight of the substrate is 200-600 g / m 2 , the substrate width is 1350-1650mm.

8. The method for preparing a special elastic and efficient metal polishing abrasive tool according to claim 1, characterized in that: The elastic cork particles in the gravity sand planting step S2 are elastic particles formed by crushing oak bark.

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