CN108161782B - preparation method of modified silicon nitride waterproof resin grinding wheel - Google Patents
preparation method of modified silicon nitride waterproof resin grinding wheel Download PDFInfo
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- CN108161782B CN108161782B CN201810137818.6A CN201810137818A CN108161782B CN 108161782 B CN108161782 B CN 108161782B CN 201810137818 A CN201810137818 A CN 201810137818A CN 108161782 B CN108161782 B CN 108161782B
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- 238000000227 grinding Methods 0.000 title claims abstract description 124
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical class N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 229920005989 resin Polymers 0.000 title claims abstract description 54
- 239000011347 resin Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 40
- 239000000835 fiber Substances 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 32
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 25
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims abstract description 14
- 241000237858 Gastropoda Species 0.000 claims abstract description 14
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims description 46
- 238000002390 rotary evaporation Methods 0.000 claims description 46
- 238000003756 stirring Methods 0.000 claims description 46
- 239000000203 mixture Substances 0.000 claims description 27
- 238000001816 cooling Methods 0.000 claims description 24
- 238000007599 discharging Methods 0.000 claims description 24
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 18
- 238000000855 fermentation Methods 0.000 claims description 18
- 230000004151 fermentation Effects 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 18
- 238000005303 weighing Methods 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 17
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 15
- 235000019764 Soybean Meal Nutrition 0.000 claims description 14
- 238000004321 preservation Methods 0.000 claims description 14
- 239000000376 reactant Substances 0.000 claims description 14
- 239000004455 soybean meal Substances 0.000 claims description 14
- 238000011282 treatment Methods 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 13
- 235000018553 tannin Nutrition 0.000 claims description 13
- 229920001864 tannin Polymers 0.000 claims description 13
- 239000001648 tannin Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000011268 mixed slurry Substances 0.000 claims description 12
- 210000003097 mucus Anatomy 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 11
- 239000004327 boric acid Substances 0.000 claims description 11
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 9
- 229910052573 porcelain Inorganic materials 0.000 claims description 9
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 8
- 239000006004 Quartz sand Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 8
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- 238000006722 reduction reaction Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 235000013618 yogurt Nutrition 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- 235000019441 ethanol Nutrition 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 235000008390 olive oil Nutrition 0.000 claims description 6
- 239000004006 olive oil Substances 0.000 claims description 6
- 238000000748 compression moulding Methods 0.000 claims description 5
- 239000012295 chemical reaction liquid Substances 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 238000010025 steaming Methods 0.000 claims description 2
- 239000012744 reinforcing agent Substances 0.000 abstract description 2
- 235000013824 polyphenols Nutrition 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 229920001568 phenolic resin Polymers 0.000 description 5
- 239000005011 phenolic resin Substances 0.000 description 5
- 102000004169 proteins and genes Human genes 0.000 description 5
- 108090000623 proteins and genes Proteins 0.000 description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 4
- 239000007767 bonding agent Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 125000004185 ester group Chemical group 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 235000015112 vegetable and seed oil Nutrition 0.000 description 3
- 239000008158 vegetable oil Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- OBOXTJCIIVUZEN-UHFFFAOYSA-N [C].[O] Chemical class [C].[O] OBOXTJCIIVUZEN-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001638 boron Chemical class 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Classifications
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- 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
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/009—Tools not otherwise provided for
-
- 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
- B24D3/20—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 organic
- B24D3/28—Resins or natural or synthetic macromolecular compounds
- B24D3/285—Reaction products obtained from aldehydes or ketones
-
- 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
- B24D3/344—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 the bonding agent being organic
-
- 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
- B24D3/346—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 utilised during polishing, or grinding operation
Abstract
The invention relates to the technical field of grinding wheel preparation, in particular to a preparation method of a modified silicon nitride waterproof resin grinding wheel. The modified silicon nitride waterproof resin grinding wheel is prepared by taking modified phenolic resin as a base material, modified self-made silicon nitride fibers and self-made mixed liquor as reinforcing agents and sodium persulfate, snail slime and the like as auxiliary materials.
Description
Technical Field
The invention relates to the technical field of grinding wheel preparation, in particular to a preparation method of a modified silicon nitride waterproof resin grinding wheel.
Background
Grinding wheels are the most important type of grinding tool in grinding operations. The grinding wheel is a porous body prepared by adding a binding agent into an abrasive, compacting, drying and roasting. The grinding wheel is the one with the largest use amount and the widest use range in the grinding tool, rotates at high speed when in use, and can perform coarse grinding, semi-fine grinding, slotting, cutting and the like on the excircle, the inner circle, the plane, various molded surfaces and the like of a metal or nonmetal workpiece.
The material used to bond the abrasive in the wheel is called the bond, and the properties of the bond determine the strength, impact resistance, heat resistance and corrosion resistance of the wheel. At present, the bonding agent is mainly divided into four types, namely ceramic, resin, rubber and metal, wherein the resin bonding agent has high strength, large elasticity and impact resistance, is suitable for high-speed grinding with v more than 50m/s, and can be made into a sheet grinding wheel for groove grinding, cutting and the like.
The resin abrasive cutting wheel is a thin sheet grinding wheel which is formed by bonding loose abrasive materials by using resin as a bonding agent and is solidified into a certain shape. The resin grinding wheel is generally divided into a common resin grinding wheel and a super-hard resin grinding wheel according to an abrasive. The common resin grinding wheel is a grinding wheel taking common grinding materials such as white corundum, brown corundum, silicon carbide and the like as main grinding components, and the super-hard resin grinding wheel is a grinding wheel taking diamond or CBN as main grinding components. The resin grinding wheel has the advantages of small grinding force, low grinding temperature, good self-sharpening property, high grinding efficiency and the like, and is widely applied to grinding processing of hard and brittle materials such as hard alloy, ceramic, glass and the like.
At present, the existing resin grinding wheel molding process has the following defects: 1. because the grinding materials are hard, the bonding layer between the grinding materials is very thin, and the contact between the grinding materials is almost rigid, the grinding wheel has higher rigidity, grinding capacity and grinding efficiency, but the surface of a workpiece to be ground is easy to scratch by the grinding wheel, and better surface processing quality is difficult to obtain; 2. the heat resistance is poor, thereby greatly restricting the service efficiency and the service life of the resin grinding wheel. In addition, the resin grinding wheels in the prior art are not waterproof, so that the resin grinding wheels cannot be ground by grinding fluid in the working process, the heat dissipation effect of the resin grinding wheels is influenced, ablation traces and burrs are left on the cut section of a workpiece in serious cases, and meanwhile, resin bonding agents of the grinding wheels are carbonized, so that the grinding wheels are easily cracked and damaged.
Therefore, it is necessary to develop a resin grinding wheel capable of solving the above-mentioned performance problems.
Disclosure of Invention
the technical problems to be solved by the invention are as follows: aiming at the defects that the prior common resin grinding wheel has poor heat resistance, thereby greatly restricting the service efficiency and the service life of the resin grinding wheel, and in addition, the resin grinding wheel is not waterproof, so that the resin grinding wheel can not be ground by grinding fluid in the working process, the heat dissipation effect of the resin grinding wheel is influenced, and ablation traces and burrs are left on the cut section of a workpiece in serious cases, the preparation method of the modified silicon nitride waterproof resin grinding wheel is provided.
In order to solve the technical problems, the invention adopts the following technical scheme:
A preparation method of a modified silicon nitride waterproof resin grinding wheel is characterized by comprising the following specific preparation steps:
(1) mixing quartz sand, activated carbon and yttrium oxide, grinding and crushing to obtain grinding powder, adding absolute ethyl alcohol with the mass of 3% of that of the grinding powder into the grinding powder, continuously mixing and stirring to obtain mixed slurry, putting the mixed slurry into a rotary evaporator, carrying out rotary evaporation, stopping the rotary evaporation after no ethyl alcohol is evaporated to obtain a rotary evaporation substance, putting the rotary evaporation substance into an alumina porcelain boat, putting the alumina porcelain boat into a tubular furnace, heating at the speed of 3-5 ℃/min under the protection of ammonia gas, carrying out heat preservation treatment, introducing nitrogen gas for protection, heating at the speed of 2-4 ℃/min, carrying out carbothermic reduction reaction, naturally cooling to room temperature, and discharging to obtain the self-made silicon nitride fiber;
(2) mixing and stirring the self-made silicon nitride fiber and a silane coupling agent KH-570 to obtain a mixture, adding 9% by mass of olive oil and 0.8% by mass of yoghourt into the mixture, filling the mixture into a fermentation tank, sealing and fermenting, and taking out a fermentation product after the fermentation is finished, namely the modified self-made silicon nitride fiber;
(3) weighing 65-75 g of phenol, placing the phenol into a beaker with 35-40 mL of ammonia water, mixing, sealing and stirring, introducing 95-100 mL of formaldehyde into the beaker after stirring, continuing to perform sealing reaction to obtain a reactant, mixing and reacting the reactant, boric acid and aniline, heating, performing heat preservation treatment, cooling and discharging to obtain a self-made reaction solution;
(4) Pouring the self-made reaction liquid into a single-neck round-bottom flask, placing the single-neck round-bottom flask into a rotary evaporator for rotary evaporation, stopping rotary evaporation after no evaporated substance escapes, obtaining a rotary evaporated material, continuously pouring the rotary evaporated material into a watch glass, placing the watch glass into an oven for drying, naturally cooling to room temperature, and discharging to obtain the modified phenolic resin;
(5) weighing 16-20 g of soybean meal, pouring the soybean meal into a beaker with 42-55 mL of tannin solution, and mixing and stirring to obtain a self-made mixed solution;
(6) Weighing 32-36 parts of modified phenolic resin, 12-16 parts of modified self-made silicon nitride fiber, 6-8 parts of self-made mixed liquid, 2-4 parts of sodium persulfate and 1-3 parts of snail mucus respectively, mixing the modified phenolic resin, the modified self-made silicon nitride fiber, the self-made mixed liquid, the sodium persulfate and the snail mucus, putting the mixture into a grinding wheel die, flattening the mixture, putting the mixture into an extruder, carrying out compression molding to obtain a grinding wheel blank, continuously putting the grinding wheel blank into an oven for drying, naturally cooling to room temperature, and discharging to obtain the modified silicon nitride waterproof resin grinding wheel.
The mass ratio of the quartz sand, the activated carbon and the yttrium oxide in the step (1) is 6: 2: 1, grinding and crushing for 16-20 min, continuously stirring for 6-8 min, carrying out rotary evaporation at 45-50 ℃ for 10-12 min, raising the temperature to 850-1050 ℃, carrying out heat preservation treatment for 1-2 h, raising the temperature again at 1450-1650 ℃, and carrying out carbothermic reduction for 2-4 h.
the mass ratio of the self-made silicon nitride fiber in the step (2) to the silane coupling agent KH-570 is 4: 1, stirring for 8-10 min, fermenting at 28-32 ℃ for 6-8 days.
The mass fraction of the ammonia water in the step (3) is 32%, the stirring temperature is 25-30 ℃, the stirring time is 24-32 min, the continuous reaction temperature is 45-60 ℃, the continuous reaction time is 16-20 min, and the mass ratio of reactants, boric acid and aniline is 7: 2: 1, mixing and reacting for 36-42 min, heating to 85-90 ℃, and keeping the temperature for 10-12 min.
And (4) carrying out rotary steaming at the temperature of 35-45 ℃ for 12-16 min, and carrying out drying at the temperature of 65-75 ℃ for 24-30 min.
The mass fraction of the tannin solution in the step (5) is 30%, and the stirring time is 24-32 min.
And (3) stirring at 65-75 ℃ for 24-32 min, wherein the outer diameter of the grinding wheel die is 600mm, the thickness is 16mm, the pore diameter is 300mm, the extrusion pressure is 10-12 MPa, the drying temperature is 85-100 ℃, and the drying time is 2-4 h.
Compared with other methods, the method has the beneficial technical effects that:
(1) The invention takes modified phenolic resin as a base material, modified self-made silicon nitride fiber and self-made mixed liquid as a reinforcing agent, sodium persulfate, snail slime and the like are used as auxiliary materials to prepare the modified silicon nitride waterproof resin grinding wheel, firstly boric acid and aniline are used for carrying out double modification on the phenolic resin, in the stirring process, the phenolic hydroxyl of phenol and the boric hydroxyl of boric acid are subjected to chemical reaction to form a boric phenolic ester structure, as the boric phenolic ester structure taking boron atoms as a core seals partial phenolic hydroxyl, the thermal decomposition reaction based on the phenolic hydroxyl is not easy to occur, and meanwhile, the boric phenolic ester structure forms boron oxide in the cracking process, thereby avoiding the formation of small molecular carbon-oxygen compounds, obviously reducing the loss amount of carbon in the phenolic resin, being beneficial to improving the high temperature resistance of the resin grinding wheel, and in addition, aniline is added into the boron phenolic resin, the nitrogen molecules of the aniline and the boron molecules of the boric acid are subjected to coordination reaction to form a waterproof protective layer with a chelate structure, so that the water resistance of the boron phenolic resin is improved, and meanwhile, the modified boron phenolic resin is effectively filled in the pores inside the resin grinding wheel, so that the improvement of the water resistance of the resin grinding wheel is facilitated;
(2) the invention utilizes silane coupling agent to modify silicon nitride fiber, the silicon nitride fiber, vegetable oil and yoghourt are blended and fermented, the vegetable oil is decomposed by utilizing microorganism to generate hydrophobic ester group, the ester group is grafted to the surface of the silicon nitride fiber under the self-crosslinking action of the microorganism, wherein the ester group is a polar group, so that the compatibility of the silicon nitride fiber and a base material is improved, the vegetable oil is a high-hydrophobic substance, the silicon nitride fiber has heat resistance, the silicon nitride fiber is utilized to effectively fill the internal pores of the resin grinding wheel, the high temperature resistance and the hydrophobicity of the resin grinding wheel are improved, soybean meal and tannin solution are continuously added, wherein the soybean meal contains abundant protein, the polar group of the protein and the phenolic hydroxyl group of the tannin solution generate hydrogen bond polymerization, and the phenolic hydroxyl group is similar to a hydrogen bond, so that the bonding force between tannin and protein is enhanced, in addition, tannin is distributed among protein molecules in a multi-point combination mode to form a hydrophobic layer, and meanwhile coordination tanning is carried out between the tannin and the protein, so that a compact tannin-protein space net-shaped crosslinking system is formed, the waterproofness of the resin grinding wheel is further improved, and the resin grinding wheel has a wide application prospect.
Detailed Description
According to the mass ratio of 6: 2: 1, mixing quartz sand, activated carbon and yttrium oxide, grinding and crushing for 16-20 min to obtain grinding powder, adding absolute ethyl alcohol with the mass of 3% of the grinding powder into the grinding powder, continuously mixing and stirring for 6-8 min to obtain mixed slurry, placing the mixed slurry into a rotary evaporator, carrying out rotary evaporation for 10-12 min at the temperature of 45-50 ℃, stopping the rotary evaporation after no ethyl alcohol is evaporated to obtain rotary evaporation, placing the rotary evaporation into an alumina ceramic boat, placing the alumina ceramic boat into a tubular furnace, heating to 850-1050 ℃ at the speed of 3-5 ℃/min under the protection of ammonia gas, carrying out heat preservation treatment for 1-2 h, introducing nitrogen protection, heating to 1450-1650 ℃ at the speed of 2-4 ℃/min, carrying out carbothermic reduction reaction for 2-4 h, naturally cooling to room temperature, and discharging to obtain the self-made silicon nitride fiber; self-made silicon nitride fibers and a silane coupling agent KH-570 are mixed according to the mass ratio of 4: 1, mixing and stirring for 8-10 min to obtain a mixture, adding 9% by mass of olive oil and 0.8% by mass of yoghourt into the mixture, filling the mixture into a fermentation tank, sealing and fermenting for 6-8 days at the temperature of 28-32 ℃, and taking out a fermentation product after the fermentation is finished, namely the modified self-made silicon nitride fiber; weighing 65-75 g of phenol, putting the phenol into a beaker with 35-40 mL of 32% ammonia water by mass fraction, mixing and sealing at 25-30 ℃, stirring for 24-32 min, introducing 95-100 mL of formaldehyde into the beaker after stirring, continuing to perform sealed reaction at 45-60 ℃ for 16-20 min to obtain a reactant, and mixing the reactant, boric acid and aniline according to the mass ratio of 7: 2: 1, mixing and reacting for 36-42 min, heating to 85-90 ℃, carrying out heat preservation treatment for 10-12 min, cooling and discharging to obtain a self-made reaction solution, pouring the self-made reaction solution into a single-neck round-bottom flask, placing the single-neck round-bottom flask into a rotary evaporator, carrying out rotary evaporation for 12-16 min at the temperature of 35-45 ℃, stopping rotary evaporation after no evaporation product escapes to obtain a rotary evaporation material, continuously pouring the rotary evaporation material into a watch glass, placing the watch glass into an oven, drying for 24-30 min at the temperature of 65-75 ℃, naturally cooling to room temperature, and discharging to obtain modified phenolic resin; weighing 16-20 g of soybean meal, pouring the soybean meal into a beaker with 42-55 mL of 30% tannin solution, and mixing and stirring for 24-32 min to obtain a self-made mixed solution; weighing 32-36 parts of modified phenolic resin, 12-16 parts of modified self-made silicon nitride fiber, 6-8 parts of self-made mixed liquid, 2-4 parts of sodium persulfate and 1-3 parts of snail mucus respectively, mixing the modified phenolic resin, the modified self-made silicon nitride fiber, the self-made mixed liquid, the sodium persulfate and the snail mucus in a stirrer, stirring at 65-75 ℃ for 24-32 min to obtain a mixture, spreading the mixture in a grinding wheel die with the outer diameter of 600mm, the thickness of 16mm and the pore diameter of 300mm, placing the grinding wheel die in an extruder, pressing and molding under the pressure of 10-12 MPa to obtain a grinding wheel blank, continuously placing the grinding wheel blank in an oven, drying at the temperature of 85-100 ℃ for 2-4 h, naturally cooling to room temperature, and discharging to obtain the modified silicon nitride waterproof resin grinding wheel.
Example 1
According to the mass ratio of 6: 2: 1, mixing quartz sand, activated carbon and yttrium oxide, grinding and crushing for 16min to obtain ground powder, adding absolute ethyl alcohol with the mass of 3% of the ground powder into the ground powder, continuously mixing and stirring for 6min to obtain mixed slurry, placing the mixed slurry into a rotary evaporator, carrying out rotary evaporation at the temperature of 45 ℃ for 10min, stopping the rotary evaporation after no ethyl alcohol is evaporated to obtain rotary evaporation, placing the rotary evaporation into an alumina porcelain boat, placing the alumina porcelain boat into a tubular furnace, heating to 850 ℃ at the speed of 3 ℃/min under the protection of ammonia gas, carrying out heat preservation treatment for 1h, introducing nitrogen protection, heating to 1450 ℃ at the speed of 2 ℃/min, carrying out carbothermic reduction reaction for 2h, naturally cooling to room temperature, and discharging to obtain self-made silicon nitride fibers; self-made silicon nitride fibers and a silane coupling agent KH-570 are mixed according to the mass ratio of 4: 1, mixing and stirring for 8min to obtain a mixture, adding 9% of olive oil and 0.8% of yoghourt into the mixture, filling the mixture into a fermentation tank, sealing and fermenting for 6 days at the temperature of 28 ℃, and taking out a fermentation product after the fermentation is finished, namely the modified self-made silicon nitride fiber; weighing 65g of phenol, putting the phenol into a beaker with 35mL of 32% ammonia water by mass fraction, mixing and sealing at 25 ℃, stirring for 24min, introducing 95mL of formaldehyde into the beaker after stirring, continuously sealing and reacting at 45 ℃ for 16min to obtain a reactant, and mixing the reactant, boric acid and aniline according to the mass ratio of 7: 2: 1, mixing and reacting for 36min, heating to 85 ℃, carrying out heat preservation treatment for 10min, cooling and discharging to obtain a self-made reaction solution, pouring the self-made reaction solution into a single-neck round-bottom flask, placing the single-neck round-bottom flask into a rotary evaporator, carrying out rotary evaporation for 12min at the temperature of 35 ℃, stopping the rotary evaporation after no evaporation product escapes, thus obtaining a rotary evaporation material, continuously pouring the rotary evaporation material into a watch glass, placing the watch glass into an oven, drying for 24min at the temperature of 65 ℃, naturally cooling to room temperature, and discharging to obtain modified phenolic resin; weighing 16g of soybean meal, pouring the soybean meal into a beaker with 42mL of tannin solution with the mass fraction of 30%, and mixing and stirring for 24min to obtain a self-made mixed solution; weighing 32 parts of modified phenolic resin, 12 parts of modified self-made silicon nitride fiber, 6 parts of self-made mixed liquor, 2 parts of sodium persulfate and 1 part of snail mucus respectively, mixing the modified phenolic resin, the modified self-made silicon nitride fiber, the self-made mixed liquor, the sodium persulfate and the snail mucus in a stirrer, stirring for 24min at the temperature of 65 ℃ to obtain a mixed material, putting the mixed material into a grinding wheel die with the outer diameter of 600mm, the thickness of 16mm and the pore diameter of 300mm, flattening, putting the mixed material into an extruder, performing compression molding under the pressure of 10MPa to obtain a grinding wheel blank, continuously putting the grinding wheel blank into an oven, drying for 2h at the temperature of 85 ℃, naturally cooling to room temperature, and discharging to obtain the modified silicon nitride waterproof resin grinding wheel.
Example 2
According to the mass ratio of 6: 2: 1, quartz sand, activated carbon and yttrium oxide are mixed, ground and crushed for 18min to obtain ground powder, absolute ethyl alcohol with the mass of 3% of the ground powder is added into the ground powder, the mixture is continuously mixed and stirred for 7min to obtain mixed slurry, the mixed slurry is placed in a rotary evaporator, rotary evaporation is carried out for 11min at the temperature of 47 ℃, after no ethyl alcohol is evaporated, the rotary evaporation is stopped to obtain rotary evaporation, the rotary evaporation is placed in an alumina porcelain boat and placed in a tubular furnace, the temperature is increased to 950 ℃ at the speed of 4 ℃/min under the protection of ammonia gas, heat preservation treatment is carried out for 1.5h, nitrogen protection is introduced, the temperature is increased to 1550 ℃ at the speed of 3 ℃/min, carbothermic reduction reaction is carried out for 3h, natural cooling is carried out to the room temperature, and discharging is carried out to obtain the self-made silicon nitride fiber; self-made silicon nitride fibers and a silane coupling agent KH-570 are mixed according to the mass ratio of 4: 1, mixing and stirring for 9min to obtain a mixture, adding 9% by mass of olive oil and 0.8% by mass of yoghourt into the mixture, filling the mixture into a fermentation tank, sealing and fermenting for 7 days at the temperature of 30 ℃, and taking out a fermentation product after the fermentation is finished, namely the modified self-made silicon nitride fiber; weighing 70g of phenol, putting the phenol into a beaker with 38mL of ammonia water with the mass fraction of 32%, mixing and sealing at the temperature of 27 ℃, stirring for 28min, introducing 97mL of formaldehyde into the beaker after stirring, continuing to perform sealing reaction at the temperature of 53 ℃ for 18min to obtain a reactant, and mixing the reactant, boric acid and aniline according to the mass ratio of 7: 2: 1, mixing and reacting for 39min, heating to 87 ℃, carrying out heat preservation treatment for 11min, cooling and discharging to obtain a self-made reaction solution, pouring the self-made reaction solution into a single-neck round-bottom flask, placing the single-neck round-bottom flask into a rotary evaporator, carrying out rotary evaporation for 14min at the temperature of 40 ℃, stopping the rotary evaporation after no evaporation product escapes, thus obtaining a rotary evaporation material, continuously pouring the rotary evaporation material into a watch glass, placing the watch glass into an oven, drying for 26min at the temperature of 70 ℃, naturally cooling to room temperature, and discharging to obtain modified phenolic resin; weighing 18g of soybean meal, pouring the soybean meal into a beaker containing 47mL of 30% tannin solution by mass, and mixing and stirring for 28min to obtain a self-made mixed solution; weighing 34 parts of modified phenolic resin, 14 parts of modified self-made silicon nitride fiber, 7 parts of self-made mixed liquor, 3 parts of sodium persulfate and 2 parts of snail mucus respectively, mixing the modified phenolic resin, the modified self-made silicon nitride fiber, the self-made mixed liquor, the sodium persulfate and the snail mucus in a stirrer, stirring for 28min at the temperature of 70 ℃ to obtain a mixed material, placing the mixed material into a grinding wheel die with the outer diameter of 600mm, the thickness of 16mm and the pore diameter of 300mm, flattening, placing the mixed material into an extruder, performing compression molding under the pressure of 11MPa to obtain a grinding wheel blank, continuously placing the grinding wheel blank into an oven, drying for 3h at the temperature of 93 ℃, naturally cooling to room temperature, and discharging to obtain the modified silicon nitride waterproof resin grinding wheel.
example 3
According to the mass ratio of 6: 2: 1, mixing quartz sand, activated carbon and yttrium oxide, grinding and crushing for 20min to obtain grinding powder, adding absolute ethyl alcohol with the mass of 3% of the grinding powder into the grinding powder, continuously mixing and stirring for 8min to obtain mixed slurry, placing the mixed slurry into a rotary evaporator, carrying out rotary evaporation at the temperature of 50 ℃ for 12min, stopping the rotary evaporation after no ethyl alcohol is evaporated to obtain rotary evaporation, placing the rotary evaporation into an alumina porcelain boat, placing the alumina porcelain boat into a tubular furnace, heating to 1050 ℃ at the speed of 5 ℃/min under the protection of ammonia gas, carrying out heat preservation treatment for 2h, introducing nitrogen for protection, heating to 1650 ℃ at the speed of 4 ℃/min, carrying out carbothermic reduction reaction for 4h, naturally cooling to room temperature, and discharging to obtain the self-made silicon nitride fiber; self-made silicon nitride fibers and a silane coupling agent KH-570 are mixed according to the mass ratio of 4: 1, mixing and stirring for 10min to obtain a mixture, adding 9% by mass of olive oil and 0.8% by mass of yoghourt into the mixture, filling the mixture into a fermentation tank, sealing and fermenting for 8 days at the temperature of 32 ℃, and taking out a fermentation product after the fermentation is finished, namely the modified self-made silicon nitride fiber; weighing 75g of phenol, putting the phenol into a beaker with 40mL of 32% ammonia water by mass fraction, mixing and sealing at the temperature of 30 ℃, stirring for 32min, introducing 100mL of formaldehyde into the beaker after stirring, continuing to perform sealing reaction at the temperature of 60 ℃ for 20min to obtain a reactant, and mixing the reactant, boric acid and aniline according to the mass ratio of 7: 2: 1, mixing and reacting for 42min, heating to 90 ℃, carrying out heat preservation treatment for 12min, cooling and discharging to obtain a self-made reaction solution, pouring the self-made reaction solution into a single-neck round-bottom flask, placing the single-neck round-bottom flask into a rotary evaporator, carrying out rotary evaporation for 16min at the temperature of 45 ℃, stopping the rotary evaporation after no evaporation product escapes, thus obtaining a rotary evaporation material, continuously pouring the rotary evaporation material into a watch glass, placing the watch glass into an oven, drying for 30min at the temperature of 75 ℃, naturally cooling to room temperature, and discharging to obtain modified phenolic resin; weighing 20g of soybean meal, pouring the soybean meal into a beaker with 55mL of tannin solution with the mass fraction of 30%, and mixing and stirring for 32min to obtain a self-made mixed solution; weighing 36 parts of modified phenolic resin, 16 parts of modified self-made silicon nitride fiber, 8 parts of self-made mixed liquor, 4 parts of sodium persulfate and 3 parts of snail mucus respectively, mixing the modified phenolic resin, the modified self-made silicon nitride fiber, the self-made mixed liquor, the sodium persulfate and the snail mucus in a stirrer, stirring for 32min at the temperature of 75 ℃ to obtain a mixed material, putting the mixed material into a grinding wheel die with the outer diameter of 600mm, the thickness of 16mm and the pore diameter of 300mm, flattening, putting the mixed material into an extruder, performing compression molding under the pressure of 12MPa to obtain a grinding wheel blank, continuously putting the grinding wheel blank into an oven, drying for 4h at the temperature of 100 ℃, naturally cooling to room temperature, and discharging to obtain the modified silicon nitride waterproof resin grinding wheel.
Comparative example
Resin grinding wheel manufactured by a certain company of Shanghai city as a comparative example
the modified silicon nitride waterproof resin grinding wheel prepared by the invention and the resin grinding wheel in the comparative example are detected, and the detection results are shown in table 1:
The test is carried out according to the standard of GB/T2485-2016 bonded abrasive tool technical conditions.
Sample preparation: examples 1 to 3 and comparative example samples prepared according to the invention, steel rods with a diameter of 14 mm.
TABLE 1 measurement results of Properties
the data in table 1 show that the modified silicon nitride waterproof resin grinding wheel prepared by the invention has the advantages of high strength, good wear resistance and water resistance, fast heat dissipation, long service life, suitability for cutting metal at high and low speeds, high cutting size precision, smooth cutting surface, good self-sharpening property in the use process of the grinding tool, no need of finishing and improvement of production efficiency.
Claims (7)
1. A preparation method of a modified silicon nitride waterproof resin grinding wheel is characterized by comprising the following specific preparation steps:
(1) Mixing quartz sand, activated carbon and yttrium oxide, grinding and crushing to obtain grinding powder, adding absolute ethyl alcohol with the mass of 3% of that of the grinding powder into the grinding powder, continuously mixing and stirring to obtain mixed slurry, putting the mixed slurry into a rotary evaporator, carrying out rotary evaporation, stopping the rotary evaporation after no ethyl alcohol is evaporated to obtain a rotary evaporation substance, putting the rotary evaporation substance into an alumina porcelain boat, putting the alumina porcelain boat into a tubular furnace, heating at the speed of 3-5 ℃/min under the protection of ammonia gas, carrying out heat preservation treatment, introducing nitrogen gas for protection, heating at the speed of 2-4 ℃/min, carrying out carbothermic reduction reaction, naturally cooling to room temperature, and discharging to obtain the self-made silicon nitride fiber;
(2) Mixing and stirring the self-made silicon nitride fiber and a silane coupling agent KH-570 to obtain a mixture, adding 9% by mass of olive oil and 0.8% by mass of yoghourt into the mixture, filling the mixture into a fermentation tank, sealing and fermenting, and taking out a fermentation product after the fermentation is finished, namely the modified self-made silicon nitride fiber;
(3) Weighing 65-75 g of phenol, placing the phenol into a beaker with 35-40 mL of ammonia water, mixing, sealing and stirring, introducing 95-100 mL of formaldehyde into the beaker after stirring, continuing to perform sealing reaction to obtain a reactant, mixing and reacting the reactant, boric acid and aniline, heating, performing heat preservation treatment, cooling and discharging to obtain a self-made reaction solution;
(4) Pouring the self-made reaction liquid into a single-neck round-bottom flask, placing the single-neck round-bottom flask into a rotary evaporator for rotary evaporation, stopping rotary evaporation after no evaporated substance escapes, obtaining a rotary evaporated material, continuously pouring the rotary evaporated material into a watch glass, placing the watch glass into an oven for drying, naturally cooling to room temperature, and discharging to obtain the modified phenolic resin;
(5) Weighing 16-20 g of soybean meal, pouring the soybean meal into a beaker with 42-55 mL of tannin solution, and mixing and stirring to obtain a self-made mixed solution;
(6) Weighing 32-36 parts of modified phenolic resin, 12-16 parts of modified self-made silicon nitride fiber, 6-8 parts of self-made mixed liquid, 2-4 parts of sodium persulfate and 1-3 parts of snail mucus respectively, mixing the modified phenolic resin, the modified self-made silicon nitride fiber, the self-made mixed liquid, the sodium persulfate and the snail mucus, putting the mixture into a grinding wheel die, flattening the mixture, putting the mixture into an extruder, carrying out compression molding to obtain a grinding wheel blank, continuously putting the grinding wheel blank into an oven for drying, naturally cooling to room temperature, and discharging to obtain the modified silicon nitride waterproof resin grinding wheel.
2. the method for preparing a modified silicon nitride waterproof resin grinding wheel according to claim 1, wherein the method comprises the following steps: the mass ratio of the quartz sand, the activated carbon and the yttrium oxide in the step (1) is 6: 2: 1, grinding and crushing for 16-20 min, continuously stirring for 6-8 min, carrying out rotary evaporation at 45-50 ℃ for 10-12 min, raising the temperature to 850-1050 ℃, carrying out heat preservation treatment for 1-2 h, raising the temperature again at 1450-1650 ℃, and carrying out carbothermic reduction for 2-4 h.
3. the method for preparing a modified silicon nitride waterproof resin grinding wheel according to claim 1, wherein the method comprises the following steps: the mass ratio of the self-made silicon nitride fiber in the step (2) to the silane coupling agent KH-570 is 4: 1, stirring for 8-10 min, fermenting at 28-32 ℃ for 6-8 days.
4. The method for preparing a modified silicon nitride waterproof resin grinding wheel according to claim 1, wherein the method comprises the following steps: the mass fraction of the ammonia water in the step (3) is 32%, the stirring temperature is 25-30 ℃, the stirring time is 24-32 min, the continuous reaction temperature is 45-60 ℃, the continuous reaction time is 16-20 min, and the mass ratio of reactants, boric acid and aniline is 7: 2: 1, mixing and reacting for 36-42 min, heating to 85-90 ℃, and keeping the temperature for 10-12 min.
5. The method for preparing a modified silicon nitride waterproof resin grinding wheel according to claim 1, wherein the method comprises the following steps: and (4) carrying out rotary steaming at the temperature of 35-45 ℃ for 12-16 min, and carrying out drying at the temperature of 65-75 ℃ for 24-30 min.
6. The method for preparing a modified silicon nitride waterproof resin grinding wheel according to claim 1, wherein the method comprises the following steps: the mass fraction of the tannin solution in the step (5) is 30%, and the stirring time is 24-32 min.
7. The method for preparing a modified silicon nitride waterproof resin grinding wheel according to claim 1, wherein the method comprises the following steps: and (3) stirring at 65-75 ℃ for 24-32 min, wherein the outer diameter of the grinding wheel die is 600mm, the thickness is 16mm, the pore diameter is 300mm, the extrusion pressure is 10-12 MPa, the drying temperature is 85-100 ℃, and the drying time is 2-4 h.
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| CN105234839A (en) * | 2015-10-09 | 2016-01-13 | 芜湖市鸿坤汽车零部件有限公司 | Resin grinding wheel and preparation method thereof |
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| WO2009073703A2 (en) * | 2007-12-04 | 2009-06-11 | Saint-Gobain Abrasives, Inc. | Alkanolamine-modified phenolic resin formulation and coatings for abrasive products |
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| US3053020A (en) * | 1959-04-21 | 1962-09-11 | Carborundum Co | Sectional coated abrasive belt and process of making the same |
| CN105234839A (en) * | 2015-10-09 | 2016-01-13 | 芜湖市鸿坤汽车零部件有限公司 | Resin grinding wheel and preparation method thereof |
| CN107400330A (en) * | 2017-08-09 | 2017-11-28 | 安徽昌悌进出口贸易有限公司 | A kind of heat-resisting emery wheel material of resin base high viscosity |
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