CN114800296B - High-strength ultrathin abrasive cutting wheel and preparation method thereof - Google Patents
High-strength ultrathin abrasive cutting wheel and preparation method thereof Download PDFInfo
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- 238000005520 cutting process Methods 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title abstract description 24
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 51
- 239000005011 phenolic resin Substances 0.000 claims abstract description 51
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 30
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052796 boron Inorganic materials 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 239000000835 fiber Substances 0.000 claims abstract description 24
- 239000000945 filler Substances 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 23
- 239000003822 epoxy resin Substances 0.000 claims abstract description 22
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 22
- 239000011973 solid acid Substances 0.000 claims abstract description 20
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims abstract description 16
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 claims abstract description 12
- WPHUUIODWRNJLO-UHFFFAOYSA-N 2-nitrobenzenesulfonyl chloride Chemical compound [O-][N+](=O)C1=CC=CC=C1S(Cl)(=O)=O WPHUUIODWRNJLO-UHFFFAOYSA-N 0.000 claims abstract description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910001610 cryolite Inorganic materials 0.000 claims abstract description 7
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 5
- 239000010440 gypsum Substances 0.000 claims abstract description 5
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 5
- 239000004744 fabric Substances 0.000 claims description 27
- 229910052593 corundum Inorganic materials 0.000 claims description 24
- 239000010431 corundum Substances 0.000 claims description 24
- 238000002156 mixing Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 21
- 239000005083 Zinc sulfide Substances 0.000 claims description 15
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 15
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000012778 molding material Substances 0.000 claims description 12
- 238000005245 sintering Methods 0.000 claims description 12
- RFVNOJDQRGSOEL-UHFFFAOYSA-N 2-hydroxyethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCO RFVNOJDQRGSOEL-UHFFFAOYSA-N 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 9
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 9
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 9
- 229940100242 glycol stearate Drugs 0.000 claims description 7
- 229920000059 polyethylene glycol stearate Polymers 0.000 claims description 7
- 238000003892 spreading Methods 0.000 claims description 6
- 230000007480 spreading Effects 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 2
- 238000000748 compression moulding Methods 0.000 claims description 2
- 238000000227 grinding Methods 0.000 abstract description 41
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 35
- 239000000203 mixture Substances 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 14
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 12
- 229920005989 resin Polymers 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- 239000003082 abrasive agent Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 6
- 229910052721 tungsten Inorganic materials 0.000 description 6
- 239000010937 tungsten Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 230000004913 activation Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000007142 ring opening reaction Methods 0.000 description 4
- 238000007873 sieving Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000011162 core material Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229920000578 graft copolymer Polymers 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012643 polycondensation polymerization Methods 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The application relates to the technical field of grinding wheels, and particularly discloses a high-strength ultrathin abrasive cutting wheel and a preparation method thereof. The high-strength ultrathin abrasive cutting wheel is mainly prepared from the following raw materials in parts by weight: 60-70 parts of abrasive, 12-15 parts of phenolic resin liquid, 8-10 parts of filler, 5-8 parts of phenolic resin powder, 3.5-4 parts of epoxy resin, 2.3-2.6 parts of polyvinyl butyral, 0.2-0.5 part of boron fiber and 2-3.5 parts of reinforcing agent; the filler is at least two of cryolite, gypsum, titanium dioxide and zirconia; the reinforcing agent consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and solid acid in the molar ratio of (0.78-1.2) (0.45-0.6) (0.015-0.028). The high-strength ultrathin abrasive cutting wheel can be used for machining metal workpieces, and has the advantages of high strength, good toughness and difficulty in cracking.
Description
Technical Field
The application relates to the technical field of grinding wheel manufacturing, in particular to a high-strength ultrathin cutting grinding wheel and a preparation method thereof.
Background
The grinding wheel has wide application in industrial production, wherein the application in the fields of mechanical manufacture, metal processing, aerospace and the like mainly comprises cutting processing. The resin ultrathin cutting grinding wheel has the advantages of high cutting speed, high cutting size precision and good self-sharpening property in metal material processing application. Along with the continuous improvement of the requirements of processing precision, the size of the grinding wheel is thinner and thinner, so that the strength of the grinding wheel is more tested, and the technical problems to be solved by technicians are solved in a urgent way, namely, how to reduce the probability of deformation, crack and even damage of the grinding wheel while ensuring the cutting efficiency, the service life and other performances.
Aiming at the problems, the Chinese patent application document with the application publication number of CN108857942A discloses an ultrathin resin abrasive cutting wheel formula which is prepared from the following raw materials in parts by weight: 2-6 parts of lithopone, 0.5-4 parts of fluorite powder, 5-10 parts of cryolite, 4-8 parts of carbon black, 0.5-4 parts of iron oxide red, 30-50 parts of titanium green, 10-20 parts of titanium dioxide, 10-20 parts of white corundum abrasive, 30-50 parts of brown corundum abrasive, 15-30 parts of liquid phenolic resin, 5-10 parts of powdery phenolic resin, 8-20 parts of silicon carbide and 4-8 parts of barite, and the strength and cutting efficiency of the grinding wheel are improved to a certain extent by adopting a proper brown corundum and white corundum proportion.
Aiming at the ultrathin resin abrasive cutting wheel, the inventor considers that when the filler and the organic powder with various components are bonded by resin, the strength and toughness of a cross-linked structure formed by resin curing are lower, the bonding force on the particle materials is weaker, and the mechanical property of the whole abrasive cutting wheel is poorer.
Disclosure of Invention
In order to improve the overall mechanical property of the grinding wheel, the application provides a high-strength ultrathin cutting grinding wheel and a preparation method thereof.
In a first aspect, the present application provides a high-strength ultrathin abrasive cutoff wheel, which adopts the following technical scheme:
the high-strength ultrathin abrasive cutting wheel is mainly prepared from the following raw materials in parts by weight: 60-70 parts of abrasive, 12-15 parts of phenolic resin liquid, 8-10 parts of filler, 5-8 parts of phenolic resin powder, 3.5-4 parts of epoxy resin, 2.3-2.6 parts of polyvinyl butyral, 0.2-0.5 part of boron fiber and 2-3.5 parts of reinforcing agent; the filler is at least two of cryolite, gypsum, titanium dioxide and zirconia; the reinforcing agent consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and solid acid in the molar ratio of (0.78-1.2) (0.45-0.6) (0.015-0.028).
By adopting the technical scheme, the particle materials such as the abrasive, the filler, the phenolic resin powder and the like are uniformly mixed with the phenolic resin liquid, so that the particle materials and the liquid resin raw materials are fully mixed, and the wettability of the mixture is maintained. And then after sintering and curing, a part of phenolic resin and epoxy resin in the mixture undergo ring-opening reaction at high temperature, and the other part of phenolic resin and polyvinyl butyral generate a graft copolymer, so that a cross-linked network structure is formed, the cross-linked network structure and the boron fiber mesh cloth can be mutually entangled to form a very good coating structure, so that good coating and bonding are formed on particle raw materials, and the strength and toughness of the grinding wheel are greatly improved. In addition, the solid acid in the reinforcing agent greatly reduces the reaction activation energy of phenolic resin and epoxy resin, promotes the continuation and depth of ring-opening reaction, simultaneously performs condensation polymerization grafting reaction on o-phenylenediamine and active groups on molecular chains of the crosslinked network structure, and generates a part of moisture, in addition, the phenolic resin and the polyvinyl butyral produce graft copolymer, and simultaneously generate a part of moisture, and the moisture participates in hydrolysis reaction between nitrobenzene sulfonyl chloride and the crosslinked network structure under the promotion effect of the solid acid, and in the process, the crosslinking reaction, the hydrolysis reaction and the condensation polymerization grafting reaction are cooperatively performed, so that the binding force and toughness between molecular chains of the crosslinked network structure are greatly improved, and the mechanical property of the grinding wheel is integrally improved.
Preferably, the solid acid is at least one of zinc sulfide, aluminum phosphate and ferric sulfate.
Through adopting above-mentioned technical scheme, optimize and adjust the kind of solid acid for the solid acid receives the influence of high temperature environment less, and activation promotion effect is stronger, can further reduce the activation energy of ring-opening reaction and crosslinking reaction, makes the reaction between the resin more thorough, and crosslinked network structure's toughness and intensity are higher.
Preferably, the solid acid consists of zinc sulfide and ferric sulfate according to the mole ratio of (0.4-0.5) to (0.3-0.35).
By adopting the technical scheme, the composition ratio of the solid acid is tested and optimized, the rate and the reaction state of the curing reaction are further adjusted, the cohesive stress generated by the crosslinked reticular structure is reduced, and the cohesive force and the toughness of the crosslinked reticular structure are improved.
Preferably, the abrasive consists of white corundum, brown corundum and silicon carbide in a mass ratio of (3-5) (1-1.5) (0.2-0.5).
By adopting the technical scheme, the composition ratio of the abrasive is optimized and regulated, the hardness of the white corundum is greater than that of brown corundum, the cutting performance of the grinding wheel can be improved by the white corundum with a larger proportion, meanwhile, the thermal stability and toughness of the brown corundum are better, and the manufacturing cost of the grinding wheel is reduced. In addition, under the filling effect of silicon carbide, the self-sharpening property and the cutting efficiency of the grinding wheel are improved, and the processing performance of the grinding wheel is integrally ensured.
Preferably, the mass ratio of the phenolic resin liquid to the reinforcing agent is (4-6): 1.
By adopting the technical scheme, the proportion of the phenolic resin liquid and the reinforcing agent is adjusted and tested, the bonding degree between adjacent molecular chains is enhanced under the condition that the formation of a main structure of the crosslinked reticular structure is not influenced, the probability of the phenomenon that the structural strength is reduced due to the phenomenon of cross-linking is reduced, and the overall compactness of the grinding wheel is improved.
Preferably, the raw materials also comprise 1.2-1.5 parts by weight of glycol stearate.
By adopting the technical scheme, after the glycol stearate is added, the flexible long carbon chain of the glycol stearate is embedded and grafted into the crosslinked reticular structure, the proportion of the linear structure is increased, and the whole toughness of the grinding wheel is improved.
In a second aspect, the present application provides a method for preparing a high-strength ultrathin abrasive cutting wheel, which adopts the following technical scheme:
the preparation method of the high-strength ultrathin abrasive cutting wheel comprises the following steps:
s1: uniformly mixing the formula amount of abrasive with phenolic resin liquid and epoxy resin to obtain an intermediate material;
s2: uniformly mixing filler, phenolic resin powder, polyvinyl butyral, a reinforcing agent and an intermediate material to prepare a molding material;
s3: spreading the molding material in a mold, paving the boron fiber made into mesh cloth in the mold, performing compression molding, and then performing sintering hardening to obtain the boron fiber composite material.
Through adopting above-mentioned technical scheme, will account for more abrasive materials and liquid resin and mix earlier for evenly wrap up liquid resin on the abrasive material, then mix filler, phenolic resin powder and remaining raw materials together, form even shaping material, then prepare the grinding wheel product that mechanical properties is good after the solidification of high temperature sintering.
Preferably, in the step S3, the sintering is performed by heating to 180-190 ℃ at a heating rate of (10-12 ℃) per hour, then preserving heat for 3-3.5 hours, then cooling to 170 ℃ and preserving heat for 1-1.5 hours, and then naturally cooling to room temperature.
By adopting the technical scheme, the curing temperature is adjusted and optimized, and the curing is carried out at a proper temperature rising speed, so that the curing reaction of the resin is more uniform, and the ring-opening reaction, the polycondensation grafting reaction and the hydrolysis reaction are orderly carried out under the action of the reinforcing agent, so that the mechanical property and isotropy of the crosslinked network structure are further improved.
Preferably, the step S2 further includes a step of adding ethylene glycol stearate.
By adopting the technical scheme, the bonding force and toughness of the internal cross-linked network structure of the grinding wheel are improved by adding glycol stearate, and the overall mechanical property of the grinding wheel is improved.
In summary, the present application has the following beneficial effects:
1. because phenolic resin, epoxy resin and polyvinyl butyral are adopted to coat and bond the abrasive and the filler, and the toughness and strength of the crosslinked reticular structure are improved under the action of the boron fiber and the reinforcing agent, the overall mechanical property of the grinding wheel is greatly improved, and the cutting efficiency is greatly improved.
2. In the application, the solid acid and glycol stearate are preferably adopted to further promote the cohesive force and toughness between the molecular chains of the crosslinked reticular structure, and further improve the strength and toughness of the grinding wheel.
3. The high-strength ultrathin abrasive cutting wheel prepared by the preparation method has higher toughness and strength.
Detailed Description
The present application is described in further detail below with reference to examples.
The raw materials of the examples and comparative examples herein are commercially available in general unless otherwise specified.
Examples
Example 1
The high-strength ultrathin abrasive cutoff wheel is prepared from the following raw materials in weight: 60kg of abrasive, 12kg of phenolic resin liquid, 8kg of filler, 5kg of phenolic resin powder, 3.5kg of epoxy resin, 2.3kg of polyvinyl butyral, 0.2kg of boron fiber and 2kg of reinforcing agent.
Wherein the abrasive material consists of white corundum and brown corundum according to the mass ratio of 2:1. The filler consists of cryolite and gypsum according to the mass ratio of 5:1. The reinforcing agent consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and zinc sulfide according to the molar ratio of 0.78:0.45:0.015. The phenolic resin liquid is 2556 phenolic resin liquid. The phenolic resin powder is 2601 phenolic resin powder. The epoxy resin is epoxy resin E-44. The boron fiber is prepared by using tungsten filament as core material, adopting chemical vapor deposition method, using hydrogen as reducer, reducing high-temperature heated boron trichloride into boron, and depositing on the surface of tungsten filament, the diameter is 100 μm, and the density is 2.6g/cm 3 The strength is 3.8GPa.
The preparation method of the high-strength ultrathin abrasive cutoff wheel comprises the following steps:
s1: uniformly mixing the abrasive materials with the formula amount, adding phenolic resin liquid and epoxy resin into the mixture, and uniformly mixing the mixture in a stirrer at the stirring speed of 300rpm/min to obtain an intermediate material;
s2: mixing and stirring the filler, the phenolic resin powder, the polyvinyl butyral, the reinforcing agent and the intermediate material, adding a proper amount of ethylene glycol during the mixing period, and uniformly mixing to obtain a molding material;
s3: preheating the molding material to 35 ℃, sieving, spreading in a mould, preparing boron fibers into mesh cloth, paving the mesh cloth in the mould, then compacting and molding (the specification of a grinding wheel can be customized according to the needs of customers), heating to 190 ℃ in a hardening furnace at a heating rate of 10 ℃/h for sintering, preserving heat for 5 hours, thoroughly hardening, and naturally cooling to room temperature to obtain the finished product, wherein the specification of the grinding wheel in the embodiment is 105mm multiplied by 1.0mm multiplied by 16mm.
Example 2
The high-strength ultrathin abrasive cutoff wheel is prepared from the following raw materials in weight: 70kg of abrasive, 15kg of phenolic resin liquid, 10kg of filler, 8kg of phenolic resin powder, 4kg of epoxy resin, 2.6kg of polyvinyl butyral, 0.5kg of boron fiber and 3.5kg of reinforcing agent.
Wherein the abrasive material consists of brown corundum and silicon carbide according to the mass ratio of 2:1. The filler consists of titanium dioxide and zirconia according to the mass ratio of 5:1. The reinforcing agent consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and zinc sulfide according to the molar ratio of 0.78:0.45:0.015. The phenolic resin liquid is 2550 phenolic resin liquid. The phenolic resin powder is 2402 phenolic resin powder. The epoxy resin is epoxy resin E-51. The boron fiber is prepared by using tungsten filament as core material, adopting chemical vapor deposition method, using hydrogen as reducer, reducing high-temperature heated boron trichloride into boron, and depositing on the surface of tungsten filament, wherein the diameter is 100 μm, and the density is 2.6g/cm 3 The strength is 3.8GPa.
The preparation method of the high-strength ultrathin abrasive cutoff wheel comprises the following steps:
s1: uniformly mixing the abrasive materials with the formula amount, adding phenolic resin liquid and epoxy resin into the mixture, and uniformly mixing the mixture in a stirrer at a stirring speed of 200rpm/min to obtain an intermediate material;
s2: mixing and stirring the filler, the phenolic resin powder, the polyvinyl butyral, the reinforcing agent and the intermediate material, adding a proper amount of ethylene glycol during the mixing period, and uniformly mixing to obtain a molding material;
s3: preheating the molding material to 35 ℃, sieving, spreading in a mould, preparing boron fibers into mesh cloth, paving the mesh cloth in the mould, then compacting and molding (the specification of a grinding wheel can be customized according to the needs of customers), heating to 180 ℃ in a hardening furnace at a heating rate of 10 ℃/h for sintering, preserving heat for 5 hours, thoroughly hardening, and naturally cooling to room temperature to obtain the finished product, wherein the specification of the grinding wheel in the embodiment is 105mm multiplied by 1.0mm multiplied by 16mm.
Example 3
The high-strength ultrathin abrasive cutoff wheel is prepared from the following raw materials in weight: 68kg of abrasive, 13kg of phenolic resin liquid, 9kg of filler, 6.5kg of phenolic resin powder, 3.8kg of epoxy resin, 2.5kg of polyvinyl butyral, 0.35kg of boron fiber and 3.2kg of reinforcing agent.
Wherein the abrasive material consists of white corundum and silicon carbide according to the mass ratio of 2:1. The filler consists of cryolite and zirconia according to the mass ratio of 5:1. The reinforcing agent consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and zinc sulfide according to the molar ratio of 0.78:0.45:0.015. The phenolic resin liquid is 2556 phenolic resin liquid. The phenolic resin powder is 2601 phenolic resin powder. The epoxy resin is epoxy resin E-51. The boron fiber is prepared by using tungsten filament as core material, adopting chemical vapor deposition method, using hydrogen as reducer, reducing high-temperature heated boron trichloride into boron, and depositing on the surface of tungsten filament, wherein the diameter is 100 μm, and the density is 2.6g/cm 3 The strength is 3.8GPa.
The preparation method of the high-strength ultrathin abrasive cutoff wheel comprises the following steps:
s1: uniformly mixing the abrasive materials with the formula amount, adding phenolic resin liquid and epoxy resin into the mixture, and uniformly mixing the mixture in a stirrer at a stirring speed of 280rpm/min to obtain an intermediate material;
s2: mixing and stirring the filler, the phenolic resin powder, the polyvinyl butyral, the reinforcing agent and the intermediate material, adding a proper amount of ethylene glycol during the mixing period, and uniformly mixing to obtain a molding material;
s3: preheating the molding material to 35 ℃, sieving, spreading in a mould, preparing boron fibers into mesh cloth, paving the mesh cloth in the mould, and then compacting and molding (the specification of a grinding wheel can be customized according to the needs of customers), wherein the boron fiber mesh cloth is paved in multiple layers, in the embodiment, the boron fiber mesh cloth is paved in two layers, then, the boron fiber mesh cloth is firstly heated to 185 ℃ at the heating rate of 10 ℃/h in a hardening furnace for sintering, then, the temperature is kept for 5 hours, then, the thorough hardening is carried out, and the product is obtained after natural cooling to room temperature, wherein the specification of the grinding wheel in the embodiment is 105mm multiplied by 1.0mm multiplied by 16mm.
Example 4
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 3 in that: the reinforcing agent in the raw materials consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and zinc sulfide according to the mol ratio of 1.2:0.6:0.028, and the rest is the same as in example 3.
The preparation method of the high-strength ultrathin abrasive cutoff wheel of the embodiment is the same as that of the embodiment 3.
Example 5
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 3 in that: the reinforcing agent in the raw materials consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and zinc sulfide according to the mol ratio of 1.05:0.52:0.025, and the rest is the same as in the example 3.
The preparation method of the high-strength ultrathin abrasive cutoff wheel of the embodiment is the same as that of the embodiment 3.
Example 6
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 5 in that: the solid acid in the starting material was aluminum phosphate, and the remainder was the same as in example 5.
The preparation method of the high-strength ultrathin abrasive cutoff wheel of the embodiment is the same as that of embodiment 5.
Example 7
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 5 in that: the solid acid in the raw material consists of ferric sulfate and aluminum phosphate according to the mol ratio of 1:1, and the rest is the same as in the example 5.
The preparation method of the high-strength ultrathin abrasive cutoff wheel of the embodiment is the same as that of embodiment 5.
Example 8
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 5 in that: the solid acid in the raw material consists of zinc sulfide and ferric sulfate according to the mol ratio of 0.4:0.3, and the rest is the same as in the example 5.
The preparation method of the high-strength ultrathin abrasive cutoff wheel of the embodiment is the same as that of embodiment 5.
Example 9
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 5 in that: the solid acid in the raw material consists of zinc sulfide and ferric sulfate according to the mol ratio of 0.5:0.35, and the rest is the same as in the example 5.
The preparation method of the high-strength ultrathin abrasive cutoff wheel of the embodiment is the same as that of embodiment 5.
Example 10
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 9 in that: the raw materials comprise white corundum, brown corundum and silicon carbide according to the mass ratio of 3:1:0.2, and the rest is the same as in the example 9.
The preparation method of the high-strength ultrathin abrasive cutoff wheel of the embodiment is the same as that of the embodiment 9.
Example 11
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 9 in that: the raw materials comprise white corundum, brown corundum and silicon carbide according to the mass ratio of 5:1.5:0.5, and the rest is the same as in the example 9.
The preparation method of the high-strength ultrathin abrasive cutoff wheel of the embodiment is the same as that of the embodiment 9.
Example 12
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 10 in that: the starting material also included 1.2kg of ethylene glycol stearate, the remainder being the same as in example 10.
The method of manufacturing the high-strength ultra-thin abrasive cutoff wheel of this example was the same as that of example 10.
Example 13
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 10 in that: the starting material also included 1.5kg of ethylene glycol stearate, the remainder being the same as in example 10.
The method of manufacturing the high-strength ultra-thin abrasive cutoff wheel of this example was the same as that of example 10.
Example 14
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 13 in that: in the preparation method of the high-strength ultrathin abrasive cutting wheel, in the step S3, a forming material is preheated to 35 ℃, sieved and flattened in a die, screen cloth is added, and then the screen cloth is pressed for forming (the specification of the abrasive wheel can be customized according to the needs of customers), then the screen cloth is heated to 185 ℃ in a hardening furnace at a heating rate of 12 ℃/h for sintering, then the temperature is kept for 3 hours, then the temperature is reduced to 170 ℃ for 1 hour, the thorough hardening is carried out, and the abrasive cutting wheel is obtained after natural cooling to room temperature, and the rest of the abrasive cutting wheel is the same as the example 13.
Example 15
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 13 in that: in the preparation method of the high-strength ultrathin abrasive cutting wheel, in the step S3, a forming material is preheated to 35 ℃, sieved and flattened in a die, screen cloth is added, and then the screen cloth is pressed for forming (the specification of the abrasive wheel can be customized according to the needs of customers), then the screen cloth is heated to 185 ℃ in a hardening furnace at a heating rate of 11.5 ℃/h for sintering, then the temperature is kept for 3.5 hours, then the temperature is reduced to 170 ℃ for 1.5 hours, and then the screen cloth is thoroughly hardened, and finally the abrasive cutting wheel is obtained after natural cooling to room temperature, and the rest of the abrasive cutting wheel is the same as in the example 13.
Example 16
The high-strength ultra-thin abrasive cutoff wheel of this embodiment is different from that of embodiment 13 in that: in the preparation method of the high-strength ultrathin abrasive cutting wheel, in the step S3, a forming material is preheated to 35 ℃, sieved and flattened in a mould, screen cloth is added, and then the screen cloth is pressed for forming (the specification of the abrasive wheel can be customized according to the requirement of a customer), and then the screen cloth is put in a hardening furnace according to a fitting curve equation y= 0.2628x 2 +13.227x+25.176 as a temperature rise curve, R 2 =0.96, origin coordinates (0,35), abscissa is time, unit h;the ordinate is the temperature in degrees centigrade, and then naturally cooled to room temperature, and the rest is the same as in example 13.
Comparative example
Comparative example 1
The high-strength ultrathin abrasive cutoff wheel of the comparative example is prepared from the following raw materials in weight: 60kg of abrasive, 14kg of phenolic resin liquid, 8kg of filler, 5kg of phenolic resin powder, 3.5kg of epoxy resin and 2.3kg of polyvinyl butyral.
Wherein the abrasive material consists of white corundum and brown corundum according to the mass ratio of 2:1. The filler consists of cryolite and gypsum according to the mass ratio of 5:1. The reinforcing agent consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and zinc sulfide according to the molar ratio of 0.78:0.45:0.015.
The preparation method of the high-strength ultrathin abrasive cutoff wheel of the comparative example comprises the following steps:
s1: uniformly mixing the abrasive materials with the formula amount, adding the mixture into a phenolic resin liquid and epoxy resin early mixer, and uniformly mixing at the stirring speed of 300rpm/min to obtain an intermediate material;
s2: mixing and stirring the filler, the phenolic resin powder, the polyvinyl butyral and the intermediate material, adding a proper amount of ethylene glycol during the mixing period, and uniformly mixing to obtain a molding material;
s3: preheating the molding material to 35 ℃, sieving, spreading in a mold, adding mesh cloth, pressing and molding (the specification of the grinding wheel can be customized according to the needs of customers), heating to 185 ℃ in a hardening furnace at a heating rate of 10 ℃/h for sintering, preserving heat for 5 hours, thoroughly hardening, and naturally cooling to room temperature to obtain the product, wherein the specification of the grinding wheel in the embodiment is 105mm multiplied by 1.0mm multiplied by 16mm.
Comparative example 2
The high-strength ultra-thin abrasive cutoff wheel of this comparative example is different from that of example 1 in that: the reinforcing agent in the raw material consists of nitrobenzene sulfonyl chloride and o-phenylenediamine according to the molar ratio of 0.78:0.45.
The method for manufacturing the high-strength ultra-thin abrasive cutoff wheel of this comparative example was the same as in example 1.
Comparative example 3
The high-strength ultra-thin abrasive cutoff wheel of this comparative example is different from that of example 1 in that: the reinforcing agent in the raw material consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and sodium sulfonate according to the molar ratio of 0.78:0.45.
The method for manufacturing the high-strength ultra-thin abrasive cutoff wheel of this comparative example was the same as in example 1.
Comparative example 4
The high-strength ultra-thin abrasive cutoff wheel of this comparative example is different from example 5 in that: the solid acid in the raw material consists of zinc sulfide and ferric sulfate according to the mol ratio of 0.2:0.5, and the rest is the same as in example 5.
The preparation method of the high-strength ultra-thin abrasive cutoff wheel of this comparative example is the same as that of example 5.
Comparative example 5
The high-strength ultra-thin abrasive cutoff wheel of this comparative example is different from example 9 in that: the raw materials comprise white corundum, brown corundum and silicon carbide according to the mass ratio of 1:2:0.5, and the rest is the same as in the example 9.
The preparation method of the high-strength ultra-thin abrasive cutoff wheel of this comparative example is the same as that of example 9.
Comparative example 6
The high-strength ultra-thin abrasive cutoff wheel of this comparative example is different from that of example 1 in that: the raw materials were used to replace boron fibers to make a mesh cloth, and the rest was the same as in example 1.
The method for manufacturing the high-strength ultra-thin abrasive cutoff wheel of this comparative example was the same as in example 1.
Performance test
Detection method
The high strength ultra-thin abrasive cut-off wheels of examples 1 to 16 and comparative examples 1 to 6 were tested for flexural strength in N using an electric flexural machine, and the test results are shown in Table 1.
The high-strength ultra-thin abrasive cut-off wheels of examples 1 to 16 and comparative examples 1 to 6 were used at a rotational speed of 11000r/min under a cutting pressure of 16N, a 304 stainless steel test piece was used as a cut-off material, the cutting efficiency of the cut-off wheels was measured, and the cutting efficiency=mass of cut metal (g)/time for cutting(s) and the test results are shown in table 1.
Table 1 high strength ultra-thin abrasive cutoff wheel performance test data for examples 1-16 and comparative examples 1-6
| Sequence number | Flexural Strength N | Cutting efficiency g/s |
| Example 1 | 456.3 | 0.281 |
| Example 2 | 462.5 | 0.273 |
| Example 3 | 471.1 | 0.289 |
| Example 4 | 473.8 | 0.293 |
| Example 5 | 480.6 | 0.297 |
| Example 6 | 478.3 | 0.290 |
| Example 7 | 482.1 | 0.298 |
| Example 8 | 495.9 | 0.299 |
| Example 9 | 496.3 | 0.299 |
| Example 10 | 497.2 | 0.305 |
| Example 11 | 497.8 | 0.302 |
| Example 12 | 513.2 | 0.301 |
| Example 13 | 516.9 | 0.302 |
| Example 14 | 525.7 | 0.305 |
| Example 15 | 531.1 | 0.304 |
| Example 16 | 540.9 | 0.306 |
| Comparative example 1 | 387.9 | 0.258 |
| Comparative example 2 | 415.8 | 0.266 |
| Comparative example 3 | 409.2 | 0.261 |
| Comparative example 4 | 485.3 | 0.298 |
| Comparative example 5 | 496.9 | 0.301 |
| Comparative example 6 | 426.7 | 0.271 |
As can be seen from analysis of examples 1 to 3 and comparative example 1 in combination with table 1, optimizing and adjusting the composition ratio of the raw materials, it can be seen that the overall mechanical properties of the grinding wheel after the reinforcing agent is added are greatly increased, and compared with comparative example 1, the flexural strength of the grinding wheel of example 1 is improved by 17.6%, toughness and strength are greatly improved, cracks and deformation are not easy to occur when the grinding wheel is used, and processing precision and cutting efficiency are better.
Analysis of examples 4-5, examples 6-9 and comparative examples 2-4 and combination of table 1 can show that the proportion of the reinforcing agent and the composition ratio of the solid acid are further optimized and adjusted, the toughness and strength of the crosslinked network structure inside the grinding wheel are further improved, and it can be seen that the flexural strength of the crosslinked network structure is reduced by 8.9% compared with that of example 1 without adding the solid acid, the curing reaction of the crosslinked network structure is not thorough enough, the binding force between adjacent molecular chains is poor, and after optimization, when zinc sulfide and ferric sulfate are selected for compounding use, the flexural strength is improved by 21.3% compared with that of comparative example 3, the reaction activation energy is greatly reduced due to the fact that the zinc sulfide and the ferric sulfate form a catalytic active center, the curing reaction is more thorough, the mechanical property of the crosslinked network structure is better, the coating and binding force on particle materials are stronger, and the overall mechanical property of the grinding wheel is better.
As can be seen from the analysis of examples 10 to 11, examples 12 to 13 and comparative example 5 in combination with table 1, the composition ratio of the abrasive is further adjusted and optimized, the cutting efficiency of the grinding wheel is improved, and the mechanical properties of the crosslinked network structure are further improved after the glycol stearate is added.
As can be seen from analysis of examples 14, 15 and 16 in combination with table 1, the curing temperature is optimized and adjusted, the curing reaction process of the resin is adjusted, the mechanical properties of the crosslinked network structure are further improved, the interface strength between the particulate material and the resin is improved, and it can be seen that the flexural strength of the grinding wheel of example 16 is improved by 4.6% compared with that of example 13, and the mechanical properties are better.
As can be seen from the analysis of example 1 and comparative example 6 in combination with table 1, the flexural strength of the mesh cloth made of the added boron fiber is improved by 6.9% compared with that of the mesh cloth grinding wheel made of glass fiber, and the strength and toughness of the grinding wheel are better after the boron fiber mesh cloth is adopted, so that the overall mechanical property is better.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (7)
1. The high-strength ultrathin abrasive cutting wheel is characterized by being mainly prepared from the following raw materials in parts by weight: 60-70 parts of abrasive, 12-15 parts of phenolic resin liquid, 8-10 parts of filler, 5-8 parts of phenolic resin powder, 3.5-4 parts of epoxy resin, 2.3-2.6 parts of polyvinyl butyral, 0.2-0.5 part of boron fiber and 2-3.5 parts of reinforcing agent; the abrasive consists of white corundum, brown corundum and silicon carbide according to the mass ratio of (3-5) (1-1.5) (0.2-0.5); the filler is at least two of cryolite, gypsum, titanium dioxide and zirconia; the reinforcing agent consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and solid acid according to the molar ratio of (0.78-1.2) (0.45-0.6) (0.015-0.028); the solid acid is at least one of zinc sulfide or ferric sulfate.
2. The high-strength ultrathin abrasive cutting wheel according to claim 1, wherein the solid acid consists of zinc sulfide and ferric sulfate according to the molar ratio of (0.4-0.5) to (0.3-0.35).
3. The high strength ultra-thin abrasive cutoff wheel according to claim 1 wherein the mass ratio of phenolic resin liquid to reinforcing agent is (4-6): 1.
4. The high strength ultra-thin abrasive cutting wheel according to claim 1, wherein the raw material further comprises 1.2-1.5 parts by weight of ethylene glycol stearate.
5. A method of producing a high strength ultra-thin abrasive cutting wheel according to any one of claims 1 to 4, comprising the steps of:
s1: uniformly mixing the formula amount of abrasive with phenolic resin liquid and epoxy resin to obtain an intermediate material;
s2: uniformly mixing filler, phenolic resin powder, polyvinyl butyral, a reinforcing agent and an intermediate material to prepare a molding material;
s3: spreading the molding material in a mold, paving the boron fiber made into mesh cloth in the mold, performing compression molding, and then performing sintering hardening to obtain the boron fiber composite material.
6. The method for preparing a high-strength ultra-thin abrasive cut-off wheel according to claim 5, wherein in the step S3, sintering is performed by heating to 180-190 ℃ at a heating rate of (10 ℃ -12 ℃) per hour, then preserving heat for 3-3.5 hours, then cooling to 170 ℃ and preserving heat for 1-1.5 hours, and then naturally cooling to room temperature.
7. The ultra-thin abrasive cutoff wheel according to claim 5, wherein the step S2 further comprises the step of adding glycol stearate.
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| WO2017045524A1 (en) * | 2015-09-18 | 2017-03-23 | 苏州国量量具科技有限公司 | Hard grinding wheel and preparation method therefor |
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| EP0484161A2 (en) * | 1990-11-02 | 1992-05-06 | Ube Industries, Ltd. | Abrasive sheet and process for producing same |
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