CN115179204A - Resin grinding wheel and preparation method thereof - Google Patents

Resin grinding wheel and preparation method thereof Download PDF

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Publication number
CN115179204A
CN115179204A CN202210925826.3A CN202210925826A CN115179204A CN 115179204 A CN115179204 A CN 115179204A CN 202210925826 A CN202210925826 A CN 202210925826A CN 115179204 A CN115179204 A CN 115179204A
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Prior art keywords
grinding wheel
resin grinding
resin
boron nitride
mixture
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CN115179204B (en
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魏炜
张明安
颜杰钦
黄振宇
樊小安
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Shenzhen Yong Lin Tech Co ltd
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Shenzhen Yong Lin Tech Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
    • B24D3/14—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic ceramic, i.e. vitrified bondings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/022—Carbon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/32—Carbides; Nitrides; Borides ; Silicides
    • C04B14/325—Nitrides
    • C04B14/327—Boron nitride
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/34—Metals, e.g. ferro-silicon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/38—Fibrous materials; Whiskers
    • C04B14/386—Carbon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/0016—Granular materials, e.g. microballoons
    • C04B20/002—Hollow or porous granular materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B26/14—Polyepoxides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
    • C04B2111/00362—Friction materials, e.g. used as brake linings, anti-skid materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nanotechnology (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The application relates to the technical field of grinding wheel preparation, and particularly discloses a resin grinding wheel and a preparation method thereof. The resin grinding wheel mainly comprises an abrasive, a bonding agent, a filler and an additive, wherein the filler is mainly prepared from the following raw materials: semi-hydrated gypsum powder, bauxite, polyamide wax micro powder, ceramic powder and a binder; the preparation method comprises the following steps: (1) preparation of mixture A: mixing an abrasive and a bonding agent to obtain a mixture A; (2) preparation of mixture B: mixing a filler, an additive and the mixture A prepared in the step (1) to obtain a mixture B; (3) compression molding: putting the mixture B into a mould for pressing, drying and hardening to obtain a resin grinding wheel blank body; (4) hole making: and (4) forming a plane hole on the resin grinding wheel blank body to obtain the resin grinding wheel. The resin grinding wheel that this application was made good heat dissipation, the wearability preferred.

Description

Resin grinding wheel and preparation method thereof
Technical Field
The application relates to the technical field of grinding wheel preparation, in particular to a resin grinding wheel and a preparation method thereof.
Background
At present, titanium alloy materials are introduced in 3C industries such as mobile phones and the like, grinding is needed according to the size precision and the surface roughness of a finished surface to ensure the surface quality of a part, and a grinding wheel is usually adopted for grinding. The grinding wheel is a consolidation die, which is a consolidation die with certain strength and is formed by consolidating common grinding materials into a certain shape by a bonding agent, and the grinding wheel mainly comprises the grinding materials, the bonding agent and an air hole. According to the different binders, ceramic grinding wheels, resin grinding wheels and rubber grinding wheels are commonly used.
Among them, the resin grinding wheel is a grinding wheel made of resin, has high strength, certain elasticity, low heat resistance and good self-sharpening property, and is widely used for grinding hard and brittle materials.
When the existing resin grinding wheel is in high-speed operation in the use process, the temperature of the position where the grinding wheel is rubbed with a workpiece is high, so that the quality of the workpiece is influenced.
Disclosure of Invention
The application provides a resin grinding wheel and a preparation method thereof, aiming at improving the heat dissipation performance of the resin grinding wheel.
In a first aspect, the present application provides a resin grinding wheel and a method for manufacturing the same, which adopts the following technical scheme:
a resin grinding wheel mainly comprises an abrasive, a bonding agent, a filler and an additive according to a mass ratio of 100 (40-50) to 28-42 to 2-3, wherein the filler is mainly prepared from the following raw materials in parts by weight: 8-10 parts of semi-hydrated gypsum powder, 5-8 parts of bauxite, 4-6 parts of polyamide wax micro powder, 3-5 parts of ceramic powder and 5-8 parts of binder, wherein the additive is at least two of foamed silver, magnesium porous aggregate and bamboo charcoal powder.
Preferably, the particle size of the silicon carbide is 60 to 64 μm.
Preferably, the preparation method of the magnesium porous aggregate comprises the following steps: firstly, putting 10 parts of potassium oleate into a beaker, adding 800 parts of water, and stirring for 15min at the rotating speed of 500r/min by using an electric stirrer to prepare foam; then putting 3000 parts of high-purity magnesia powder into an iron cylinder, adding 900 parts of water, and uniformly stirring to obtain magnesium oxide slurry; and finally, pouring the foam into the magnesium oxide slurry, and uniformly stirring to obtain the magnesium oxide foam slurry. And pouring the foam slurry into a mould with the size of 40mm multiplied by 40mm to be molded, naturally curing for 24 hours, then demoulding, preserving heat at 100 ℃ for 24 hours, drying, and preserving heat at 1580 ℃ for 3 hours for calcining. Crushing and sieving the sintered sample to 1-3mm, wherein the pore size distribution of the magnesium porous aggregate is 5-10 mu m.
By adopting the technical scheme, the additive is added in the preparation process of the grinding wheel, and the additive and the filler are matched with each other, so that a heat transmission channel is formed in the resin grinding wheel, and heat generated in the grinding process of the alloy grinding wheel is led out through the heat transmission channel; the polyamide wax micropowder in the filler forms a strong network structure in the resin grinding wheel, and is matched with other components in the filler to increase the strength of the resin grinding wheel; the foamed silver has good heat-conducting property, is of a porous structure, provides a natural pore structure foundation for the grinding wheel, and has a metal framework structure and a through hole structure; the magnesium porous aggregate is made of magnesium oxide, so that on one hand, the porosity of the resin grinding wheel is convenient to improve, and on the other hand, the thermal conductivity of the magnesium porous aggregate is improved; the heat conductivity and hardness of the grinding wheel are improved by adding the bamboo charcoal powder, and the wear resistance of the resin grinding wheel is improved while the heat conductivity of the grinding wheel is improved by matching the filler and the additive.
Preferably, the filler also comprises 2-5 parts by weight of a reinforcing agent, wherein the reinforcing agent consists of carbon fibers, epoxy resin AB glue and spherical agglomerated boron nitride in a mass ratio of (5-8) to (2-3) to (5-7).
By adopting the technical scheme, the reinforcing agent is added to be convenient for being matched with the additive, the spherical agglomerated boron nitride in the reinforcing agent has high thermal conductivity and high hardness, and the reinforcing agent epoxy resin AB glue adheres the spherical agglomerated boron nitride to the carbon fibers, so that the reinforcing agent forms a thermal conduction strip, and meanwhile, a plurality of pores are formed between the adjacent spherical agglomerated boron nitride and between the spherical agglomerated boron nitride and the carbon fibers, thereby improving the porosity of the grinding wheel and improving the heat dissipation performance of the grinding wheel.
Preferably, the spherical agglomerated boron nitride mainly comprises boron nitride with the grain diameter of 1-4 mu m, boron nitride with the grain diameter of 15-20 mu m and boron nitride with the grain diameter of 100-120 mu m according to the mass ratio of (10-20) to (5-8) to (8-15).
By adopting the technical scheme, the spherical agglomerated boron nitride comprises multiple particle sizes, the spherical agglomerated boron nitride with the particle size of 1-4 mu m is filled between the adjacent spherical agglomerated boron nitrides on one hand and is adhered to the surface of the boron nitride with the particle size of 100-120 mu m on the other hand, so that the heat dissipation capacity of the heat conducting strip is improved, meanwhile, the spherical agglomerated boron nitride with the particle size of 1-4 mu m is adhered to the surface of the spherical agglomerated boron nitride with the particle size of 100-120 mu m, so that the surface friction coefficient of the heat conducting strip is larger, the connection strength of the heat conducting strip and other components in the filler is improved, and the strength of the grinding wheel is improved on the premise of improving the heat dissipation performance of the grinding wheel.
Preferably, the carbon fiber has a length of 4 to 5mm and a diameter of 5 to 10mm.
Through adopting above-mentioned technical scheme, the diameter of carbon fiber is great, and length is shorter, and on the one hand, carbon fiber is great with spherical agglomeration boron nitride's area of contact, is convenient for improve the stability of being connected between carbon fiber and the spherical agglomeration boron nitride, and then improves the intensity of heat conduction strip, and on the one hand, the carbon fiber forms arborescent structure in the emery wheel is inside to at the inside arborescent heat conduction passageway of formation of emery wheel, and then improve the heat dispersion of emery wheel.
Preferably, the preparation method of the reinforcing agent comprises the following steps: mixing boron nitride with the particle size of 100-120 mu m, boron nitride with the particle size of 15-20 mu m, boron nitride with the particle size of 1/3-1/2 and boron nitride with the particle size of 1-4 mu m and 1/3-1/2 epoxy resin AB glue to obtain mixed particles, and then mixing the mixed particles, carbon fibers and the boron nitride with the residual particle size of 1-4 mu m to obtain the carbon fiber reinforced composite material.
By adopting the technical scheme, the spherical agglomerated boron nitride with small particle size is adhered to the surface of the spherical agglomerated boron nitride with large particle size under the action of the epoxy resin AB glue, so that the heat conductivity of the spherical agglomerated boron nitride with large particle size is further improved, meanwhile, the roughness of the surface of the spherical agglomerated boron nitride with large particle size is improved, then, under the action of the epoxy resin AB glue, the mixed particles are adhered to the surface of the carbon fibers, meanwhile, the spherical agglomerated boron nitride with small particle size is filled between adjacent mixed particles and in pores between the mixed particles and the carbon fibers, the strength of the heat conducting strips is improved, and further, the heat conduction stability of the resin grinding wheel is improved.
Preferably, the carbon fiber is a modified carbon fiber, and the modification method of the modified carbon fiber comprises the following steps:
s1, soaking carbon fibers in concentrated nitric acid, adding water for dilution, carrying out vacuum filtration, and drying to obtain pretreated carbon fibers;
s2, putting the pretreated carbon fibers obtained in the step S1 into an ethanol solution of a coupling agent, and carrying out vacuum filtration, drying and grinding to obtain the carbon fibers.
Preferably, the preparation method of the modified carbon fiber comprises the following steps: s1, soaking chopped carbon fibers in 65-68% nitric acid solution, continuously stirring to fully and uniformly mix the chopped carbon fibers, standing for 60 minutes at room temperature, diluting the mixture with deionized water, carrying out vacuum filtration on the diluted solution, repeating the steps until the pH value of the filtrate is greater than 6, drying the filtered carbon fibers in a drying oven at the drying temperature of 80 ℃ for 10 hours, and finally grinding and sieving to obtain pretreated carbon fibers;
s2, dissolving a coupling agent KH 550 in ethanol to prepare a solution with the mass fraction of 1%; then putting the pretreated carbon fiber prepared in the step S1 into the solution for soaking for 30 minutes, and then carrying out vacuum filtration on the solution; filtering, drying in a drying oven at 60 deg.C for 30min, grinding, and sieving.
Through adopting above-mentioned technical scheme, the carbon fiber makes the surface of carbon fiber become coarse after the processing of concentrated nitric acid, and the depth that the slot becomes is wide, there is not obvious impurity, the carbon fiber after the preliminary treatment is through the modified back of silane coupling agent, the surface roughness of carbon fiber has further been improved, the fibre outer wall has formed one deck silane coupling agent film simultaneously, thereby improve the bond strength and mechanical anchor and the intensity of carbon fiber and heat conduction granule, thereby improve the intensity of heat conduction strip, and then improve the heat conductivility of heat conduction strip, and then improve the heat conductivity of emery wheel.
Preferably, the additive consists of foamed silver, magnesium porous aggregate and bamboo charcoal powder in a mass ratio of (3-5) to (2-4).
By adopting the technical scheme, the additive is obtained by compounding the three components of the foamed silver, the magnesium porous aggregate and the bamboo charcoal powder, and the proportion of the three components is adjusted, so that the proportion of the three components is optimal, the foamed silver and the bamboo charcoal powder can be adsorbed on the surface of the magnesium porous aggregate to form a heat conduction layer, the heat conductivity of the foamed silver is good, and the heat conduction performance of the heat conduction layer is further improved by adding the porous function, so that the heat conductivity of the resin grinding wheel is improved.
Preferably, the bonding agent consists of phenolic resin powder and epoxy resin liquid according to the mass ratio of (10-15) to (8-10).
Preferably, the particle size of the phenolic resin powder is 45-51 μm.
Preferably, the viscosity of the epoxy resin liquid is 400 to 600 centipoises.
By adopting the technical scheme, the phenolic resin has higher rotary strength, but poor heat resistance, and is easy to carbonize after long-term working at high temperature, so that the adhesive force of the resin bonding agent to the grinding material is reduced, and the wear resistance is poor; the epoxy resin has good wettability, high bonding strength, high mechanical strength, small volume shrinkage and good heat resistance, and the phenolic resin powder and the epoxy resin liquid have good waterproofness and are matched with each other, so that the deformation of the grinding wheel in the grinding process is reduced.
Preferably, the abrasive material consists of brown corundum, chrome corundum and silicon carbide according to the mass ratio of (2-3) to (4-6).
By adopting the technical scheme, the silicon carbide has high hardness, large brittleness, sharp abrasive particles, good heat conductivity and strong wear resistance, brown corundum and chromium corundum are easy to cut into a workpiece during grinding, and have good self-sharpening property, small heat productivity and strong grinding force, and simultaneously, the silicon carbide grinding wheel has low price, the brown corundum, the chromium corundum and the silicon carbide are mutually matched, so that the self-sharpening property of the grinding wheel is convenient to improve, meanwhile, the grinding capacity is strong, the grinding temperature is low, and the grinding wheel is not easy to block.
In a second aspect, the present application provides a method for manufacturing a resin grinding wheel, which adopts the following technical scheme:
a preparation method of a resin grinding wheel comprises the following steps:
(1) Preparation of mixture a: mixing an abrasive and a bonding agent to obtain a mixture A;
(2) Preparation of mixture B: mixing a filler, an additive and the mixture A prepared in the step (1) to obtain a mixture B;
(3) And (3) compression molding: putting the mixture B into a mould for pressing, drying and hardening to obtain a resin grinding wheel blank body;
(4) Hole making: and (4) forming a plane hole on the resin grinding wheel blank body to obtain the resin grinding wheel.
Preferably, the forming temperature in the step (3) is 35-40 ℃ and the humidity is 9-12% rh.
Preferably, the pressing pressure in the step (3) is in the range of 20-25N/mm 2 The pressing time is 20-30s.
Preferably, the hardening temperature in the step (3) is increased by 8 ℃ per minute from room temperature to 170-190 ℃, and the temperature is kept for 5-10 hours and then cooled to room temperature.
Preferably, in the step (4), a machine tool is used for forming a plane hole on the grinding wheel.
By adopting the technical scheme, the preparation method of the grinding wheel is simple, the grinding wheel is suitable for industrial production, the heat conductivity of the grinding wheel obtained by production is better, and the wear resistance is good.
In summary, the present application has the following beneficial effects:
1. the additive is added into the resin grinding wheel, the additive is at least two of foamed silver, magnesium porous aggregate and bamboo charcoal powder, the magnesium porous aggregate in the additive is provided with a metal framework, so that a metal framework heat conduction channel is built on the grinding wheel, and meanwhile, the foamed silver and the bamboo charcoal powder are adsorbed on the surface of the magnesium porous aggregate, so that the heat conductivity of the resin grinding wheel is improved.
2. The reinforcing agent is added into the filler of the resin grinding wheel, the reinforcing agent is obtained by carbon fibers, epoxy AB glue, the spherical agglomerated boron nitride three-component complex, the spherical agglomerated boron nitride is adhered to the carbon fibers by the epoxy AB glue, so that a heat conduction strip is formed, the heat conduction strip formed by the reinforcing agent is mutually matched with the heat conduction layer formed by the additive, the heat conduction strip is connected with the heat conduction layer, and the heat conduction performance of the resin grinding wheel is improved.
Detailed Description
The present application will be described in further detail with reference to examples.
The brown corundum of the application has the granularity of 30-40 mu m.
The grain size of the chromium corundum is 20-30 mu m.
The particle size of the silicon carbide of the present application is 60 to 64 μm.
The particle size of the hemihydrate gypsum powder is 0.1-0.2mm.
The bauxite herein has a particle size of 0.1 to 0.2mm.
The particle size of the polyamide wax micro powder is 10-20 mu m.
The ceramic powder of the present application has a particle size of 5 to 10 μm.
The particle size of the foamed silver of the present application is 5 to 10 μm.
The particle size of the bamboo charcoal powder is 200-300 meshes.
The preparation process of the filler comprises the following steps: putting the raw materials of the filler into a ball milling tank, carrying out dry ball milling by adopting a ball-to-material ratio of 15.
The binder of the present application is aluminum dihydrogen phosphate.
Examples of preparation of fillers
Preparation example 1
The filler of the preparation example is prepared from the following raw materials in parts by weight: 8kg of semi-hydrated gypsum powder, 5kg of bauxite, 4kg of polyamide wax micro powder, 3kg of ceramic powder and 5kg of binder. Wherein the particle size of the semi-hydrated gypsum powder is 0.2mm; the particle size of the bauxite is 0.2mm; the particle size of the polyamide wax micro powder is 20 mu m; the grain size of the ceramic powder is 5 μm, and the binder is aluminum dihydrogen phosphate.
The preparation process of the filler of the preparation example comprises the following steps: putting the semi-hydrated gypsum powder, the bauxite, the polyamide wax micro powder, the ceramic powder and the binder into a ball milling tank, carrying out dry ball milling by adopting a ball-to-material ratio of 15.
Preparation example 2
The filler of the preparation example is prepared from the following raw materials in parts by weight: 10kg of semi-hydrated gypsum powder, 8kg of bauxite, 6kg of polyamide wax micro powder, 5kg of ceramic powder and 8kg of binder. The rest is exactly the same as in preparation example 1.
The process for preparing the filler of this preparation example was exactly the same as that of preparation example 1.
Preparation example 3
The filler of the preparation example is prepared from the following raw materials in parts by weight: 10kg of semi-hydrated gypsum powder, 8kg of bauxite, 6kg of polyamide wax micro powder, 5kg of ceramic powder, 8kg of a binder and 2kg of a reinforcing agent, wherein the reinforcing agent consists of carbon fiber, epoxy resin AB glue and spherical agglomerated boron nitride according to a mass ratio of 5, the carbon fiber is 4mm in length and 6mm in diameter, and the spherical agglomerated boron nitride has a particle size of 100 microns, and the preparation method of the reinforcing agent comprises the following steps: mixing the carbon fiber, the epoxy resin AB glue and the spherical agglomerated boron nitride to obtain the composite material. The rest was exactly the same as in preparation example 2.
The preparation process of the filler of the preparation example comprises the following steps: putting the semi-hydrated gypsum powder, bauxite, polyamide wax micro powder, ceramic powder, a binder and a reinforcing agent into a ball milling tank, carrying out dry ball milling by adopting a ball-to-material ratio of 15.
Preparation example 4
The filler of the preparation example is prepared from the following raw materials in parts by weight: 10kg of semi-hydrated gypsum powder, 8kg of bauxite, 6kg of polyamide wax micro powder, 5kg of ceramic powder, 8kg of a binder and 5kg of a reinforcing agent, wherein the reinforcing agent consists of carbon fibers, epoxy resin AB glue and spherical agglomerated boron nitride according to a mass ratio of 8 to 7, the carbon fibers have the length of 4mm and the diameter of 6mm, and the spherical agglomerated boron nitride has the particle size of 100 mu m, and the preparation method of the reinforcing agent comprises the following steps: mixing the carbon fiber, the epoxy resin AB glue and the spherical agglomerated boron nitride to obtain the composite material. The rest was exactly the same as in preparation example 3.
The process for preparing the filler of this preparation example was exactly the same as in preparation example 3.
Preparation example 5
The filler of the preparation example is different from the filler of the preparation example 4 in that: the spherical agglomerated boron nitride is composed of boron nitride with a particle size of 1-4 μm, boron nitride with a particle size of 15-20 μm, boron nitride with a particle size of 100-120 μm in a mass ratio of 15.
The process for preparing the filler of this preparation example was exactly the same as in preparation example 4.
Preparation example 6
The filler of the present preparation example is different from that of preparation example 5 in that: the preparation method of the reinforcing agent comprises the following steps: mixing boron nitride with the grain diameter of 100-120 mu m, boron nitride with the grain diameter of 15-20 mu m, spherical agglomerated boron nitride with the grain diameter of 1/3 to 4 mu m and 1/3 of epoxy resin AB glue to obtain mixed particles, and then mixing the mixed particles, carbon fibers and the spherical agglomerated boron nitride with the residual grain diameter of 1-4 mu m to obtain the composite material. The rest was exactly the same as in preparation example 5.
The process for preparing the filler of this preparation example was exactly the same as that of preparation example 5.
Preparation example 7
The filler of this preparation example differs from preparation example 5 in that: the carbon fiber is modified carbon fiber, and the modification method of the modified carbon fiber comprises the following steps: s1, soaking carbon fibers in 65% nitric acid solution, stirring to fully and uniformly mix the carbon fibers, standing at room temperature for 60 minutes, diluting the mixture with deionized water, performing vacuum filtration on the diluted solution, repeating the steps until the pH value of filtrate is greater than 6, drying the filtered carbon fibers in a drying oven at the drying temperature of 80 ℃ for 10 hours, and finally performing grinding and sieving operations to obtain pretreated carbon fibers;
s2, dissolving a coupling agent KH 550 in ethanol to prepare a solution with the mass fraction of 1%; then putting the pretreated carbon fiber prepared in the step S1 into the solution for soaking for 30min, and then carrying out vacuum filtration on the solution; filtering, drying in a drying oven at 60 deg.C for 30min, grinding, and sieving. The rest was exactly the same as in preparation example 5.
The process for preparing the filler of this preparation example was exactly the same as that of preparation example 5.
Examples
Example 1
The resin grinding wheel of the embodiment is prepared from the following raw materials in parts by weight: 100kg of abrasive, 40kg of bonding agent, 28kg of filler and 2kg of additive, wherein the filler is prepared by preparation example 1, the abrasive is composed of brown fused alumina, chromium fused alumina and silicon carbide according to a mass ratio of 2 to 6, the bonding agent is composed of phenolic resin powder and epoxy resin liquid according to a mass ratio of 10 to 8, the particle size of the phenolic resin powder is 50 microns, and the viscosity of the epoxy resin liquid is 500 centipoises.
The preparation method of the resin grinding wheel comprises the following steps:
(1) Preparation of mixture A: mixing the grinding material and the epoxy resin liquid to obtain a mixture A;
(2) Preparation of mixture B: mixing the filler, phenolic resin powder, an additive and the mixture A prepared in the step (1) to obtain a mixture B;
(3) And (3) pressing and forming: putting the mixture B into a mould for pressing, drying and hardening to obtain a resin grinding wheel blank body; wherein the molding temperature is 40 ℃, the humidity is 10% rh, and the pressing pressure is 23N/mm 2 The pressing time is 25s, the hardening temperature is increased by 8 ℃ per minute from room temperature to 180 ℃, the temperature is kept for 8h, and the temperature is cooled to room temperature;
(4) Hole making: and (3) forming a plane hole on the resin grinding wheel blank body by adopting a machine tool to obtain the resin grinding wheel.
Examples 2 to 7
Examples 2 to 7 are resin grinding wheels made of different fillers, and the fillers of the resin grinding wheels represented by each example are shown in table 1.
TABLE 1 Filler for resinous grinding wheels of examples 1-7
Figure BDA0003779530390000071
The resin grinding wheels of examples 2 to 7 are different from example 1 in that: the filler was prepared in different preparation examples, and the rest was exactly the same as example 1.
The resin grinding wheels of examples 2 to 7 were prepared by exactly the same process as in example 1.
Example 8
The resin grinding wheel of the embodiment is prepared from the following raw materials in parts by weight: 100kg of abrasive, 50kg of bonding agent, 42kg of filler and 1kg of additive, wherein the filler is prepared by the preparation example 7, and the rest is completely the same as the example 7.
The process for preparing the resin grinding wheel of the embodiment is completely the same as that of the embodiment 7.
Example 9
The present embodiment is different from embodiment 8 in that: the additive consists of foamed silver, magnesium porous aggregate and bamboo charcoal powder according to the mass ratio of 3.
The process for manufacturing the resin grinding wheel of this example is exactly the same as that of example 8.
Example 10
The present embodiment is different from embodiment 8 in that: the additive consists of foamed silver, magnesium porous aggregate and bamboo charcoal powder according to a mass ratio of 5.
The process for manufacturing the resin grinding wheel of this example is exactly the same as that of example 8.
Comparative example
Comparative example 1
The resin grinding wheel of the comparative example is prepared from the following raw materials in parts by weight: 100kg of abrasive, 40kg of bonding agent and 28kg of filler, wherein the filler is prepared from the preparation example 1, and the rest is completely the same as the example 1.
The preparation process of the resin grinding wheel of the comparative example comprises the following steps:
(1) Preparation of mixture a: mixing the grinding material and the epoxy resin liquid to obtain a mixture A;
(2) Preparation of mixture B: mixing the filler, the phenolic resin powder and the mixture A prepared in the step (1) to obtain a mixture B;
(3) Pressed intoType (2): putting the mixture B into a mould for pressing, drying and hardening to obtain a resin grinding wheel blank body; wherein the molding temperature is 40 ℃, the humidity is 10% rh, and the pressing pressure is 23N/mm 2 The pressing time is 25s, the hardening temperature is increased by 8 ℃ per minute from room temperature to 180 ℃, the temperature is kept for 8h, and the temperature is cooled to room temperature;
(4) Hole making: and (4) forming a plane hole on the resin grinding wheel blank body to obtain the resin grinding wheel.
Comparative example 2
The resin grinding wheel of this comparative example is different from example 1 in that: the additive was silver foam, the other was exactly the same as in example 1.
The process for manufacturing the resin grinding wheel of this comparative example is exactly the same as that of example 1.
Detection method
And (3) grinding performance detection: the resin grinding wheels prepared in examples 1 to 10 and comparative examples 1 to 2 were subjected to grinding performance tests using a test apparatus: a grinding machine; workpiece material: the titanium alloy sheet has the hardness of 30HRC and the yield strength of 860MPa; setting the linear speed of the grinding wheel: 35m/s, the feeding speed of the workbench is 0.2m/min, and the feed amount is 0.02mm; for the convenience of test, the specifications of the grinding wheel in the embodiment and the comparative example of the application are 250mm in outer diameter, 32mm in inner diameter and 30mm in thickness, and the grinding wheel of the application can be customized into other sizes according to the requirements of customers; testing the grinding efficiency and the abrasion rate of the grinding wheel, wherein the grinding ratio = delta m 2 /Δm 1 Abrasion wear ratio = Δ m 1 T, (t is grinding time,. DELTA.m) 1 Is the mass difference, Δ m, of the grinding wheel before and after time t 2 Is the difference in mass of the titanium alloy sheet before and after time t), the results of the measurement are shown in table 2.
TABLE 2 grinding performance of the resin grinding wheels of examples 1 to 10 and comparative examples 1 to 2
Serial number Abrasion wear rate (g/s) Grinding ratio Grinding wheel temperature C
Example 1 6.2×10-4 17 181
Example 2 6.5×10-4 17.5 179
Example 3 5.8×10-4 19.1 168
Example 4 5.6×10-4 19.3 165
Example 5 5.1×10-4 21.1 158
Example 6 4.8×10-4 22.3 153
Example 7 4.6×10-4 22.9 150
Example 8 4.3×10-4 23.1 147
Example 9 4.2×10-4 24.1 145
Example 10 4.1×10-4 24.3 143
Comparative example 1 8.1×10-4 13.5 207
Comparative example 2 7.5×10-4 15.1 195
By combining example 1 and comparative examples 1-2, and by combining table 2, it can be seen that in example 1, relative to comparative examples 1-2, an additive is added, and the additive is composed of foamed silver and a magnesium porous aggregate, the foamed silver and the magnesium porous aggregate are matched, the magnesium porous aggregate has a metal skeleton structure and a through hole structure, the foamed silver is adhered to the surface of the magnesium porous aggregate, a heat conducting layer is formed inside the resin grinding wheel, and further the temperature of the resin grinding wheel during grinding is reduced, the grinding wheel temperature of example 1 is far lower than that of the resin grinding wheel of comparative examples 1-2, the grinding wheel abrasion rate of example 1 is low relative to that of comparative examples 1-2, and the grinding ratio of example 1 is also higher than that of comparative examples 1-2.
With reference to examples 1-4 and table 2, it can be seen that the reinforcing agent is added to the filler, the reinforcing agent is composed of carbon fibers, epoxy resin AB glue and spherical agglomerated boron nitride, the spherical agglomerated boron nitride adheres to the carbon fibers under the action of the epoxy resin AB glue, so that the reinforcing agent is added to the resin grinding wheel in the form of heat conducting strips, and the heat conducting layers formed by the additives are combined to form heat conducting channels in the resin grinding wheel, thereby reducing the temperature of the resin grinding wheel during grinding, and with reference to table 2, the grinding wheel temperature of examples 3-4 is lower than that of examples 1-2, thereby reducing the influence on the workpiece during grinding.
In combination with examples 4 to 5 and table 2, it can be seen that in example 5, with respect to example 4, spherical agglomerated boron nitride having different particle diameters, spherical agglomerated boron nitride having a small particle diameter can be filled in the gaps formed between spherical agglomerated boron nitride having a large particle diameter and carbon fibers, thereby increasing the hardness of the resin grinding wheel while reducing the temperature of the resin grinding wheel during grinding, and the grinding wheel temperature of example 5 is also much lower than that of example 4.
In combination with examples 5-7 and table 2, it can be seen that in example 6, compared with example 5, the mixing manner of the components of the reinforcing agent is optimized, so that the stability and the heat conductivity of the heat conducting strip are improved, and the grinding wheel temperature of example 6 is lower than that of example 5; example 7 compared to example 5, the carbon fibers were modified to roughen the surface of the carbon fibers, thereby increasing the bonding strength between the carbon fibers and the spherical agglomerated boron nitride, further increasing the strength of the heat conductive strips, further increasing the hardness of the resin grinding wheel, and decreasing the wear rate of the grinding wheel, and the wear rate of example 7 was also lower than that of example 5.
With reference to examples 7-10 and table 2, it can be seen that in examples 8-10, compared to example 7, the additive components and the mixture ratio of the additive components are optimized, so that the heat conductivity of the heat conducting layer of the resin grinding wheel is improved, the temperature of the grinding wheel is reduced, and the grinding wheel temperature in examples 8-10 is lower than that in example 7.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (10)

1. A resin grinding wheel is characterized by mainly comprising an abrasive, a bonding agent, a filler and an additive according to a mass ratio of 100 (40-50): (28-42): 2-3), wherein the filler is mainly prepared from the following raw materials in parts by weight: 8-10 parts of semi-hydrated gypsum powder, 5-8 parts of bauxite, 4-6 parts of polyamide wax micro powder, 3-5 parts of ceramic powder and 5-8 parts of binder, wherein the additive is at least two of foamed silver, magnesium porous aggregate and bamboo charcoal powder.
2. A resin grinding wheel according to claim 1, characterized in that: the filler also comprises 2-5 parts by weight of a reinforcing agent, wherein the reinforcing agent consists of carbon fibers, epoxy resin AB glue and spherical agglomerated boron nitride in a mass ratio of (5-8) to (2-3) to (5-7).
3. A resin grinding wheel according to claim 2, characterized in that: the spherical agglomerated boron nitride mainly comprises boron nitride with the grain diameter of 1-4 mu m, boron nitride with the grain diameter of 15-20 mu m and boron nitride with the grain diameter of 100-120 mu m according to the mass ratio of (10-20) to (5-8) to (8-15).
4. A resin grinding wheel according to claim 2, characterized in that: the length of the carbon fiber is 4-5mm, and the diameter of the carbon fiber is 5-10mm.
5. A resin grinding wheel according to claim 2, characterized in that: the preparation method of the reinforcing agent comprises the following steps: mixing boron nitride with the particle size of 100-120 mu m, boron nitride with the particle size of 15-20 mu m, boron nitride with the particle size of 1/3-1/2 and boron nitride with the particle size of 1-4 mu m and 1/3-1/2 epoxy resin AB glue to obtain mixed particles, and then mixing the mixed particles, carbon fibers and the boron nitride with the residual particle size of 1-4 mu m to obtain the carbon fiber reinforced composite material.
6. A resin grinding wheel according to claim 2, characterized in that: the carbon fiber is modified carbon fiber, and the modification method of the modified carbon fiber comprises the following steps: s1, soaking carbon fibers in concentrated nitric acid, adding water for dilution, carrying out vacuum filtration, and drying to obtain pretreated carbon fibers; s2, putting the pretreated carbon fibers obtained in the step S1 into an ethanol solution of a coupling agent, and carrying out vacuum filtration, drying and grinding to obtain the carbon fibers.
7. A resin grinding wheel according to claim 1, characterized in that: the additive consists of foamed silver, magnesium porous aggregate and bamboo charcoal powder in a mass ratio of (3-5) to (2-4).
8. A resin grinding wheel according to claim 1, characterized in that: the binding agent consists of phenolic resin powder and epoxy resin liquid according to the mass ratio of (10-15) to (8-10).
9. A resin grinding wheel according to claim 1, characterized in that: the abrasive material consists of brown corundum, chrome corundum and silicon carbide according to the mass ratio of (2-3) to (4-6).
10. A method of manufacturing a resin grinding wheel using the resin grinding wheel according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:
(1) Preparation of mixture A: mixing an abrasive and a bonding agent to obtain a mixture A;
(2) Preparation of mixture B: mixing a filler, an additive and the mixture A prepared in the step (1) to obtain a mixture B;
(3) And (3) compression molding: putting the mixture B into a mould for pressing, drying and hardening to obtain a resin grinding wheel blank body;
(4) Hole making: and (4) forming a plane hole on the resin grinding wheel blank body to obtain the resin grinding wheel.
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CN112405377A (en) * 2020-11-17 2021-02-26 郑州天狮研磨材料有限公司 Novel grinding wheel formula and grinding wheel production method
CN113732966A (en) * 2021-08-04 2021-12-03 郑州磨料磨具磨削研究所有限公司 Composite binder grinding wheel and preparation method thereof
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FR1573863A (en) * 1966-11-30 1969-07-11
CN102649263A (en) * 2012-05-04 2012-08-29 南京航空航天大学 Porous metal skeleton grinding wheel with heat self-dredge function
CN102825559A (en) * 2012-07-31 2012-12-19 安徽威铭耐磨材料有限公司 Ceramic CBN (Cubic Boron Nitride) grinding wheel doped with bamboo charcoal powders
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CN106944937A (en) * 2017-03-17 2017-07-14 衢州学院 A kind of preparation method of the diamond abrasive tool pellet of use porous ceramic skeleton resin reinforcing
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CN114833733A (en) * 2022-04-25 2022-08-02 亳州市鑫磊超硬材料有限责任公司 Diamond resin grinding wheel and preparation method thereof

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