CN114800296A - 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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- CN114800296A CN114800296A CN202210321523.0A CN202210321523A CN114800296A CN 114800296 A CN114800296 A CN 114800296A CN 202210321523 A CN202210321523 A CN 202210321523A CN 114800296 A CN114800296 A CN 114800296A
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- abrasive
- reinforcing agent
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- 238000005520 cutting process Methods 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 238000000227 grinding Methods 0.000 claims abstract description 65
- 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
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052796 boron Inorganic materials 0.000 claims abstract description 39
- 239000000835 fiber Substances 0.000 claims abstract description 31
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 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
- 239000000463 material Substances 0.000 claims description 36
- 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
- 239000004744 fabric Substances 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 16
- 239000012778 molding material Substances 0.000 claims description 16
- 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
- RFVNOJDQRGSOEL-UHFFFAOYSA-N 2-hydroxyethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCO RFVNOJDQRGSOEL-UHFFFAOYSA-N 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000005245 sintering Methods 0.000 claims description 11
- 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
- 238000001816 cooling Methods 0.000 claims description 7
- 229910000358 iron sulfate Inorganic materials 0.000 claims description 5
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 5
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims description 4
- 229940100242 glycol stearate Drugs 0.000 claims description 3
- 229920000059 polyethylene glycol stearate Polymers 0.000 claims description 3
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 238000000748 compression moulding Methods 0.000 claims description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 35
- 229920005989 resin Polymers 0.000 description 13
- 239000011347 resin Substances 0.000 description 13
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 12
- 238000003756 stirring Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 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
- 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 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000003082 abrasive agent Substances 0.000 description 4
- 230000004913 activation Effects 0.000 description 4
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 4
- 238000007142 ring opening reaction Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000005229 chemical vapour deposition 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
- 229910001651 emery Inorganic materials 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 3
- 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 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229920000578 graft copolymer Polymers 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 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
- 208000037656 Respiratory Sounds Diseases 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
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 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
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect 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
- 238000001514 detection method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010436 fluorite Substances 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
- 238000000465 moulding Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007858 starting material Substances 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 cutting grinding wheel and a preparation method thereof. A 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 to 0.45-0.6 to 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
Grinding wheels are widely applied to industrial production, wherein the cutting processing is mainly applied to the fields of mechanical manufacturing, metal processing, ship aerospace and the like. The resin ultrathin abrasive cutting wheel has the advantages of high cutting speed, high cutting size precision and good self-sharpening performance in the processing application of metal materials. Wherein, with the requirement of machining precision constantly improving, the size of emery wheel is also more and more thin, and this intensity to the emery wheel has had bigger examination, how to reduce the probability that the emery wheel appears warping, crackle even damage when guaranteeing performances such as cutting efficiency, life, these are the technological problem that the technical staff awaits a urgent need to solve.
In order to solve the problems, the Chinese patent application with application publication number CN108857942A discloses a formula of an ultrathin resin cutting grinding wheel, 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 cyan, 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 the cutting efficiency of the grinding wheel are improved to a certain extent by adopting a proper proportion of brown corundum to white corundum.
For the ultrathin resin cutting grinding wheel, the inventor thinks that when fillers and organic powder with various components are bonded by resin, the strength and toughness of a cross-linked structure formed by curing the resin are low, the bonding force to particle materials is weak, and the mechanical property of the whole grinding wheel is poor.
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 ultra-thin abrasive cutoff wheel, which adopts the following technical scheme:
a 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 to 0.45-0.6 to 0.015-0.028.
By adopting the technical scheme, the particle materials such as the grinding material, 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 material are fully mixed, and the wettability of the mixture is kept. After sintering and curing, part of phenolic resin and epoxy resin in the mixture are subjected to ring-opening reaction at high temperature, the other part of phenolic resin and polyvinyl butyral generate a graft copolymer, and the three form a cross-linked network structure which can be mutually entangled with boron fiber mesh to form a very good coating structure, so that the particle raw material is well coated and bonded, 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 the phenolic resin and the epoxy resin, promotes the continuation and the penetration of a ring opening reaction, simultaneously, the o-phenylenediamine and an active group on a molecular chain of a cross-linked network structure carry out a polycondensation grafting reaction, and generates a part of moisture, and in addition, the phenolic resin and the polyvinyl butyral produce a graft copolymer, and simultaneously generate a part of moisture which participates in a hydrolysis reaction between the nitrobenzene sulfonyl chloride and the cross-linked network structure under the promotion effect of the solid acid.
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 solid acid receives the influence of high temperature environment littleer, and the 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 crosslinking network's toughness and intensity are higher.
Preferably, the solid acid consists of zinc sulfide and ferric sulfate according to a molar 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 speed and the reaction state of the curing reaction are further adjusted, the cohesive stress generated by the cross-linked network structure is reduced, and the adhesive force and the toughness of the cross-linked network structure are improved.
Preferably, the abrasive material consists of white corundum, brown corundum and silicon carbide according to the mass ratio of (3-5) to (1-1.5) to (0.2-0.5).
By adopting the technical scheme, the composition proportion of the grinding material is optimized and adjusted, the hardness of the white corundum is greater than that of the 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 the toughness of the brown corundum are better, and the manufacturing cost of the grinding wheel is reduced. In addition, under the filling action of the silicon carbide, the self-sharpening performance and the cutting efficiency of the grinding wheel are improved, and the processing performance of the grinding wheel is integrally guaranteed.
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 forming condition of a main structure of a cross-linked reticular structure is not influenced, the probability of the phenomenon that the structural strength is reduced due to the over-cross-linking phenomenon is reduced, and the integral compactness degree of the grinding wheel is improved.
Preferably, the raw material also comprises 1.2-1.5 parts by weight of glycol stearate.
By adopting the technical scheme, after the ethylene glycol stearate is added, the flexible long carbon chain of the ethylene glycol stearate is embedded and grafted into the cross-linked net structure, the proportion of the linear structure is increased, and the integral toughness of the grinding wheel is improved.
In a second aspect, the present application provides a method for manufacturing a high-strength ultrathin abrasive cutoff wheel, which adopts the following technical scheme:
a preparation method of a high-strength ultrathin abrasive cutoff wheel comprises the following steps:
s1: uniformly mixing the grinding material with the formula amount, phenolic resin liquid and epoxy resin to prepare an intermediate material;
s2: uniformly mixing the filler, the phenolic resin powder, the polyvinyl butyral, the reinforcing agent and the intermediate material to prepare a molding material;
s3: and flattening the molding material in a mold, preparing boron fibers into a mesh cloth, laying the mesh cloth in the mold, performing compression molding, and sintering and hardening to obtain the boron fiber reinforced plastic composite material.
By adopting the technical scheme, the grinding materials with more proportion are mixed with the liquid resin, so that the liquid resin is uniformly wrapped on the grinding materials, then the filler, the phenolic resin powder and the rest raw materials are mixed together to form a uniform molding material, and then the molding material is sintered and cured at a high temperature to prepare the grinding wheel product with good mechanical property.
Preferably, in the step S3, the sintering is performed by heating to 190 ℃ at a heating rate of (10 ℃ -12 ℃)/h, then maintaining the temperature for 3-3.5h, then cooling to 170 ℃ and maintaining the temperature for 1-1.5h, and then naturally cooling to room temperature.
By adopting the technical scheme, the curing temperature is adjusted and optimized, and the resin is cured at a proper heating speed, so that the curing reaction of the resin is more uniform, and meanwhile, under the action of the reinforcing agent, the ring-opening reaction, the polycondensation grafting reaction and the hydrolysis reaction are orderly carried out, and are mutually promoted, and 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 ethylene glycol stearate is added to improve the bonding force and toughness of the cross-linked network structure in the grinding wheel and improve the overall mechanical property of the grinding wheel.
In summary, the present application has the following beneficial effects:
1. as the grinding material and the filler are coated and bonded by adopting the phenolic resin, the epoxy resin and the polyvinyl butyral, the toughness and the strength of the cross-linked 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, solid acid and glycol stearate are preferably adopted to further promote the cohesive force and toughness between molecular chains of the cross-linked network 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 high toughness and strength.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials of the examples and comparative examples of the present application are generally commercially available unless otherwise specified.
Examples
Example 1
The high-strength ultrathin abrasive cutoff wheel is prepared from the following raw materials in parts by weight: 60kg of grinding material, 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 taking a tungsten filament as a core material, adopting a chemical vapor deposition method, taking hydrogen as a reducing agent, reducing boron trichloride heated at high temperature into boron and depositing the boron on the surface of the tungsten filament, wherein the diameter of the boron fiber is 100 mu m, and the density of the boron fiber is 2.6g/cm 3 And the strength is 3.8 GPa.
The preparation method of the high-strength ultrathin abrasive cutoff wheel comprises the following steps:
s1: uniformly mixing the grinding materials according to the formula amount, adding the phenolic resin liquid and the epoxy resin, and uniformly mixing in a stirrer at a 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 mixing, and uniformly mixing to obtain a molding material;
s3: the molding material is preheated to 35 ℃, sieved and then flattened in a mold, boron fibers are made into mesh cloth, the mesh cloth is laid in the mold and then is pressed and molded (the specification of the grinding wheel can be customized according to the requirement of a customer), then the mesh cloth is heated to 190 ℃ at the heating rate of 10 ℃/h in a hardening furnace for sintering, then the temperature is kept for 5h and then the mesh cloth is completely hardened, and the boron fiber is obtained after natural cooling to the room temperature, wherein the specification of the grinding wheel in the embodiment is 105mm multiplied by 1.0mm multiplied by 16 mm.
Example 2
The high-strength ultrathin abrasive cutoff wheel is prepared from the following raw materials in parts by weight: 70kg of grinding material, 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 is composed 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 taking a tungsten filament as a core material, adopting a chemical vapor deposition method, taking hydrogen as a reducing agent, reducing boron trichloride heated at high temperature into boron and depositing the boron on the surface of the tungsten filament, wherein the diameter of the boron fiber is 100 mu m, and the density of the boron fiber is 2.6g/cm 3 And the strength is 3.8 GPa.
The preparation method of the high-strength ultrathin abrasive cutoff wheel comprises the following steps:
s1: uniformly mixing the grinding materials according to the formula amount, adding phenolic resin liquid and epoxy resin, and uniformly mixing 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 mixing, and uniformly mixing to obtain a molding material;
s3: the molding material is preheated to 35 ℃, sieved and then flattened in a mold, boron fibers are made into mesh cloth, the mesh cloth is laid in the mold and then is pressed and molded (the specification of the grinding wheel can be customized according to the requirement of a customer), then the mesh cloth is heated to 180 ℃ at the heating rate of 10 ℃/h in a hardening furnace for sintering, then the temperature is kept for 5h and then the mesh cloth is completely hardened, and the boron fiber is obtained after natural cooling to the room temperature, wherein the specification of the grinding wheel in the embodiment is 105mm multiplied by 1.0mm multiplied by 16 mm.
Example 3
The high-strength ultrathin abrasive cutoff wheel is prepared from the following raw materials in parts by weight: 68kg of grinding material, 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 grinding 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 is prepared from nitrobenzene sulfonyl chloride, o-phenylenediamine and zinc sulfide according to the mol ratio0.78:0.45: 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 taking a tungsten filament as a core material, adopting a chemical vapor deposition method, taking hydrogen as a reducing agent, reducing boron trichloride heated at high temperature into boron and depositing the boron on the surface of the tungsten filament, wherein the diameter of the boron fiber is 100 mu m, and the density of the boron fiber is 2.6g/cm 3 And the strength is 3.8 GPa.
The preparation method of the high-strength ultrathin abrasive cutoff wheel comprises the following steps:
s1: uniformly mixing the grinding materials according to the formula amount, adding phenolic resin liquid and epoxy resin, and uniformly mixing 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 mixing, and uniformly mixing to obtain a molding material;
s3: the forming material is preheated to 35 ℃, sieved, flattened in a mold, boron fiber is made into mesh cloth, the mesh cloth is laid in the mold and then is pressed and formed (the specification of the grinding wheel can be customized according to the requirement of a customer), wherein the boron fiber mesh cloth is laid in multiple layers, in the embodiment, the boron fiber mesh cloth is laid in two layers, then the boron fiber mesh cloth is heated to 185 ℃ in a hardening furnace at the heating rate of 10 ℃/h for sintering, then the temperature is kept for 5h and then is completely hardened, and the boron fiber mesh cloth is naturally cooled to the room temperature, wherein the specification of the grinding wheel in the embodiment is 105mm multiplied by 1.0mm multiplied by 16 mm.
Example 4
The high-strength ultrathin abrasive cutoff wheel of the present example is different from example 3 in that: the reinforcing agent in the raw material consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and zinc sulfide according to the molar ratio of 1.2:0.6:0.028, and the rest is the same as that in the example 3.
The method for manufacturing the high-strength ultrathin abrasive cutoff wheel of this example is the same as that of example 3.
Example 5
The high-strength ultrathin abrasive cutoff wheel of the present example is different from example 3 in that: the reinforcing agent in the raw materials consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and zinc sulfide according to the molar ratio of 1.05:0.52:0.025, and the rest is the same as that in the example 3.
The method for manufacturing the high-strength ultrathin abrasive cutoff wheel of this example is the same as that of example 3.
Example 6
The high-strength ultrathin abrasive cutoff wheel of the present example is different from example 5 in that: the solid acid in the starting material was aluminum phosphate, the rest being the same as in example 5.
The method for manufacturing the high-strength ultrathin abrasive cutoff wheel of this example is the same as that of example 5.
Example 7
The high-strength ultrathin abrasive cutoff wheel of the present example is different from example 5 in that: the solid acid in the raw material consists of ferric sulfate and aluminum phosphate according to the molar ratio of 1:1, and the rest is the same as that in the example 5.
The method for manufacturing the high-strength ultrathin abrasive cutoff wheel of this example is the same as that of example 5.
Example 8
The high-strength ultrathin abrasive cutoff wheel of the present example is different from example 5 in that: the solid acid in the feed consisted of zinc sulfide and iron sulfate in a molar ratio of 0.4:0.3, the rest being the same as in example 5.
The method for manufacturing the high-strength ultrathin abrasive cutoff wheel of this example is the same as that of example 5.
Example 9
The high-strength ultrathin abrasive cutoff wheel of the present example is different from example 5 in that: the solid acid in the raw material consisted of zinc sulfide and iron sulfate in a molar ratio of 0.5:0.35, and the rest was the same as in example 5.
The method for manufacturing the high-strength ultrathin abrasive cutoff wheel of this example is the same as that of example 5.
Example 10
The high-strength ultrathin abrasive cutoff wheel of the present embodiment is different from that of embodiment 9 in that: the abrasive in the raw materials consists of white corundum, brown corundum and silicon carbide according to the mass ratio of 3:1:0.2, and the rest is the same as that in the embodiment 9.
The method for manufacturing the high-strength ultrathin abrasive cutoff wheel of this example is the same as that of example 9.
Example 11
The high-strength ultrathin abrasive cutoff wheel of the present example differs from example 9 in that: the abrasive in the raw materials consists of 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 that in the embodiment 9.
The method for manufacturing the high-strength ultrathin abrasive cutoff wheel of this example is the same as that of example 9.
Example 12
The high-strength ultrathin abrasive cutoff wheel of the present example is different from example 10 in that: the feed also included 1.2kg of ethylene glycol stearate, the remainder being the same as in example 10.
The method for manufacturing the high-strength ultra-thin abrasive cutoff wheel of this example is the same as that of example 10.
Example 13
The high-strength ultrathin abrasive cutoff wheel of the present example is different from example 10 in that: the feed also included 1.5kg of ethylene glycol stearate, the remainder being the same as in example 10.
The method for manufacturing the high-strength ultra-thin abrasive cutoff wheel of this example is the same as that of example 10.
Example 14
The high-strength ultrathin abrasive cutoff wheel of the present example is different from that of example 13 in that: in the preparation method of the high-strength ultrathin cutting grinding wheel, in step S3, the molding material is preheated to 35 ℃, sieved, flattened in a mold, added with mesh cloth and press-molded (the specification of the grinding wheel can be customized according to the requirement of a customer), then heated to 185 ℃ at a heating rate of 12 ℃/h in a hardening furnace for sintering, then heat-preserved for 3h, then cooled to 170 ℃, heat-preserved for 1h, and completely hardened, and naturally cooled to room temperature, and the rest is the same as that in example 13.
Example 15
The high-strength ultrathin abrasive cutoff wheel of the present example differs from example 13 in that: in the preparation method of the high-strength ultrathin cutting grinding wheel, in step S3, the molding material is preheated to 35 ℃, sieved, flattened in a mold, added with mesh cloth and press-molded (the specification of the grinding wheel can be customized according to the requirement of a customer), then heated to 185 ℃ at a heating rate of 11.5 ℃/h in a hardening furnace for sintering, then completely hardened after heat preservation for 3.5h, then cooled to 170 ℃ and preserved for 1.5h, and naturally cooled to room temperature, and the rest is the same as that of the embodiment 13.
Example 16
The high-strength ultrathin abrasive cutoff wheel of the present example differs from example 13 in that: in the preparation method of the high-strength ultrathin cutting grinding wheel, in step S3, the molding material is preheated to 35 ℃, sieved, flattened in a die, added with mesh cloth and pressed for molding (the specification of the grinding wheel can be customized according to the requirement of a customer), and then placed in a hardening furnace according to a fitting curve equation y of 0.2628x 2 +13.227x +25.176 as temperature rise curve for sinter hardening, R 2 0.96, origin coordinate (0,35), abscissa time, unit h; the ordinate is temperature in units ℃, and the product is obtained after natural cooling to room temperature, and the rest is the same as that of 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 parts by weight: 60kg of grinding material, 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 comprises the following steps:
s1: uniformly mixing the grinding materials according to the formula amount, adding the grinding materials into a phenolic resin liquid and an epoxy resin early mixer, and uniformly mixing at a 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 mixing, and uniformly mixing to obtain a molding material;
s3: the molding material is preheated to 35 ℃, sieved, flattened in a mold, added with mesh cloth and pressed to be molded (the specification of the grinding wheel can be customized according to the requirement of a customer), then heated to 185 ℃ at a heating rate of 10 ℃/h in a hardening furnace for sintering, then completely hardened after heat preservation for 5h, and naturally cooled to room temperature, thus obtaining the grinding wheel with the specification of 105mm × 1.0mm × 16 mm.
Comparative example 2
The high-strength ultra-thin abrasive cutoff wheel of this comparative example differs from 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 manufacturing method of the high-strength ultra-thin abrasive cutoff wheel of this comparative example is the same as that of example 1.
Comparative example 3
The high-strength ultra-thin abrasive cutoff wheel of this comparative example differs from example 1 in that: the reinforcing agent in the raw materials consists of nitrobenzene sulfonyl chloride, o-phenylenediamine and sodium sulfonate according to the molar ratio of 0.78: 0.45.
The method of 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 differs from example 5 in that: the solid acid in the raw material consisted of zinc sulfide and iron sulfate in a molar ratio of 0.2:0.5, and the rest was the same as in example 5.
The method of manufacturing the high-strength ultra-thin abrasive cutoff wheel of this comparative example was the same as in example 5.
Comparative example 5
The high-strength ultra-thin abrasive cutoff wheel of this comparative example differs from example 9 in that: the abrasive in the raw materials consists of white corundum, brown corundum and silicon carbide according to the mass ratio of 1:2:0.5, and the rest is the same as that in the embodiment 9.
The method of manufacturing the high-strength ultra-thin abrasive cutoff wheel of this comparative example was the same as that of example 9.
Comparative example 6
The high-strength ultra-thin abrasive cutoff wheel of this comparative example differs from example 1 in that: the raw material was made into a mesh fabric by replacing boron fibers with glass fibers, and the rest was the same as in example 1.
The method of 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 cutoff wheels of examples 1 to 16 and comparative examples 1 to 6 were tested for flexural strength in N using an electric bending machine, and the test results are shown in table 1.
The test process parameters of the high-strength ultrathin cutting grinding wheels of the examples 1 to 16 and the comparative examples 1 to 6, the rotating speed of 11000r/min and the cutting pressure of 16N are adopted, the cutting material is a 304 stainless steel test sample, the cutting efficiency of the grinding wheels is tested, the cutting efficiency is the mass (g) of the cutting metal/the time(s) for cutting, and the test results are shown in Table 1.
TABLE 1 data for performance testing of high strength ultra thin abrasive cutoff wheels for examples 1-16 and comparative examples 1-6
| Serial 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 |
Analyzing examples 1-3 and comparative example 1 and combining table 1, it can be seen that optimizing and adjusting the composition ratio of the raw materials greatly increases the overall mechanical properties of the grinding wheel after the reinforcing agent is added, and compared with comparative example 1, the breaking strength of the grinding wheel of example 1 is improved by 17.6%, the toughness and strength are greatly improved, cracks and deformation are not easy to occur during use, and the processing precision and cutting efficiency are better.
Analyzing examples 4-5, examples 6-9, comparative examples 2-4 and combining table 1, it can be seen that the proportion of the reinforcing agent and the composition ratio of the solid acid are further optimized and adjusted, and the toughness and strength of the cross-linked network structure inside the grinding wheel are further improved, and it can be seen that the flexural strength of the comparative example 2 without adding the solid acid is reduced by 8.9% compared with that of example 1, the curing reaction of the cross-linked network structure is not thorough, and the binding force between adjacent molecular chains is poor, and it is found through optimization that when the zinc sulfide and the ferric sulfate are selected for combination use, the flexural strength is improved by 21.3% compared with that of the comparative example 3 using sodium sulfonate, which is probably because the zinc sulfide and the ferric sulfate form a catalytic active center, the reaction activation energy is greatly reduced, so that the curing reaction is more thorough, the mechanical property of the cross-linked network structure is better, and the coating and binding force to the particle material are stronger, the whole mechanical property of the grinding wheel is better.
It can be seen from the analysis of examples 10 to 11, examples 12 to 13, and comparative example 5 in combination with table 1 that 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 ethylene glycol stearate is added.
Analyzing example 14, example 15, and example 16 and combining table 1, it can be seen that optimizing and adjusting the curing temperature, adjusting the resin curing reaction process, further improving the mechanical properties of the cross-linked network structure, and increasing the interface strength between the particulate material and the resin, and it can be seen that the breaking strength of the grinding wheel of example 16 is increased by 4.6% compared to that of example 13, and the mechanical properties are better.
It can be seen from the analysis of example 1 and comparative example 6 and the combination of table 1 that the breaking strength of the mesh manufactured by adding boron fibers is improved by 6.9% compared with the mesh grinding wheel made of glass fibers, and the grinding wheel has better strength and toughness and better overall mechanical property after adopting the boron fiber mesh.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. A 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 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 to 0.45-0.6 to 0.015-0.028.
2. A high strength ultra-thin abrasive cutoff wheel according to claim 1 wherein said solid acid is at least one of zinc sulfide, aluminum phosphate, and iron sulfate.
3. A high strength ultra-thin abrasive cutoff wheel according to claim 2 wherein said solid acid is comprised of zinc sulfide and iron sulfate in a mole ratio of (0.4-0.5) to (0.3-0.35).
4. A high-strength ultra-thin abrasive cutting wheel as claimed in claim 1, wherein said abrasive consists of white corundum, brown corundum, silicon carbide in the mass ratio of (3-5) to (1-1.5) to (0.2-0.5).
5. The high-strength ultrathin cutting grinding wheel as claimed in claim 1, characterized in that the mass ratio of the phenolic resin liquid to the reinforcing agent is (4-6): 1.
6. A high strength ultra-thin abrasive cutoff wheel according to claim 1 wherein said stock material further comprises 1.2 to 1.5 parts by weight of ethylene glycol stearate.
7. A method of making a high strength ultra thin abrasive cutoff wheel according to any of claims 1-5 comprising the steps of:
s1: uniformly mixing the grinding material with the formula amount, phenolic resin liquid and epoxy resin to prepare an intermediate material;
s2: uniformly mixing the filler, the phenolic resin powder, the polyvinyl butyral, the reinforcing agent and the intermediate material to prepare a molding material;
s3: and flattening the molding material in a mold, preparing boron fibers into a mesh cloth, laying the mesh cloth in the mold, performing compression molding, and sintering and hardening to obtain the boron fiber reinforced plastic composite material.
8. The method as claimed in claim 7, wherein in step S3, the sintering is performed by heating to 190 ℃ at a heating rate of (10 ℃ -12 ℃)/h, then maintaining the temperature for 3-3.5h, then cooling to 170 ℃ and maintaining the temperature for 1-1.5h, and then naturally cooling to room temperature.
9. A high strength ultra-thin abrasive cutoff wheel according to claim 7, wherein said step S2 further comprises adding glycol stearate.
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| CN104669128A (en) * | 2015-03-17 | 2015-06-03 | 河南工业大学 | Super-hard grinding tool of inorganic and organic composite binder and preparation method of super-hard grinding tool |
| 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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| FR1274445A (en) * | 1959-07-22 | 1961-10-27 | Norton Co | Bonding abrasive product formed by a phenolic resin |
| EP0484161A2 (en) * | 1990-11-02 | 1992-05-06 | Ube Industries, Ltd. | Abrasive sheet and process for producing same |
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