CN112223131A - Wear-resistant sheet resin cutting sheet and preparation method thereof - Google Patents
Wear-resistant sheet resin cutting sheet and preparation method thereof Download PDFInfo
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- CN112223131A CN112223131A CN202011201330.9A CN202011201330A CN112223131A CN 112223131 A CN112223131 A CN 112223131A CN 202011201330 A CN202011201330 A CN 202011201330A CN 112223131 A CN112223131 A CN 112223131A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/12—Cut-off wheels
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/20—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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention relates to a wear-resistant sheet resin cutting slice and a preparation method thereof, wherein the contents of the components are 61 parts of grinding materials, 23 parts of binding agents, 0.7 part of wetting agents, 0.6 part of coloring agents and 14.7 parts of filling materials according to the parts by weight, 4' -bis (4-amino phenoxy methyl) triphenylamine, 1, 3-bis (3-amino phenoxy) benzene and pyromellitic dianhydride are polymerized to prepare polyimide resin which is used as the binding agent to be mixed with the grinding materials, the wetting agents, the coloring agents and the filling materials to prepare the polyimide resin cutting slice, compared with the prior art, the resin cutting slice is mostly prepared by taking phenolic resin as the binding agent, but the phenolic resin cutting slice has poor heat resistance and poor wear resistance in the using process, the phenomena of cracking, block falling and the like are easy to appear, the service life of the cutting slice is low, and the heat resistance and the wear resistance of the obtained product are greatly improved, the service life of the cutting blade is prolonged, and the product has high elasticity and strength and is suitable for high-speed grinding.
Description
Technical Field
The invention relates to the technical field of cutting pieces, in particular to a wear-resistant thin resin cutting piece and a preparation method thereof.
Background
The cutting blade belongs to a grinding wheel, is a thin sheet which is made of abrasive materials, bonding agent resins and the like and is used for common steel, stainless steel metal and nonmetal materials, has high tensile strength, impact resistance and bending strength, is widely used for production blanking of the common steel, the stainless steel metal and the nonmetal, and ensures high cutting efficiency and optimal economic effect on workpieces made of different materials by excellent materials and skillful technology.
The cutting blade mainly comprises a fiber resin cutting blade and a diamond cutting blade according to the material, wherein the resin cutting blade takes resin as a bonding agent, takes a glass fiber mesh as a rib, combines various materials, and has particularly remarkable cutting performance on difficult-to-cut materials such as alloy steel, stainless steel and the like; the diamond cutting blade is a cutting tool, and is widely applied to processing of hard and brittle materials such as stone, concrete, precast slabs, new and old roads, ceramics and the like.
Most of the existing resin cutting pieces are prepared by taking phenolic resin as a bonding agent, but the phenolic resin cutting pieces are poor in heat resistance and wear resistance and prone to cracking, chipping and the like in the using process, so that the service life of the cutting pieces is short, the use of the resin cutting pieces is limited, and the using effect of the cutting pieces is greatly reduced.
Disclosure of Invention
The invention aims to provide a wear-resistant sheet resin cutting piece and a preparation method thereof, and aims to solve the problems that in the prior art, most of resin cutting pieces are prepared by taking phenolic resin as a bonding agent, but the phenolic resin cutting pieces are poor in heat resistance and wear resistance, and are easy to crack, fall off and the like in the use process, so that the service life of the cutting pieces is short.
In order to achieve the purpose, the invention provides the following technical scheme: the preparation method of the wear-resistant sheet resin cutting disc comprises the following steps:
step (1), preparing a polyimide resin binder:
polymerizing 4, 4' -bis (4-aminophenoxymethyl) triphenylamine, 1, 3-bis (3-aminophenoxy) benzene and pyromellitic dianhydride to prepare polyimide resin serving as a bonding agent for later use;
wherein the molecular formula of the polyimide resin is as follows:
wherein m and n are polymerization degrees, m is more than 1 and less than 30, and n is more than 1 and less than 30;
step (2), abrasive pretreatment:
selecting chrome corundum and cubic boron nitride, crushing, grinding by a micro powder grinder, and mixing the screened chrome corundum with the grain diameter of 20-40 um and the cubic boron nitride according to a certain proportion to serve as grinding materials for later use;
step (3), mixing materials:
weighing the abrasive, the bonding agent, the wetting agent, the coloring agent and the filler according to a certain mass part, and adding the materials into a stirring device for mixing and stirring to obtain a mixed material;
and (4) pressing the resin cutting sheet:
adding the mixed material into a pressing die, spreading and flattening, and pressurizing at 22N/mm2Keeping the pressure for 35s, and then taking out the cutting piece;
and (5) post-processing:
putting the cutting piece into a box, heating to 100 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating to 210 ℃ at a heating rate of 5 ℃/min, preserving heat for 7h, cooling to 120 ℃ at a speed of 3 ℃/min, preserving heat for 10min, cooling to room temperature at a speed of 10 ℃/min, and taking out the cutting piece.
Preferably, in the step (1), the molar ratio of the 4, 4' -bis (4-aminophenoxymethyl) triphenylamine to the 1, 3-bis (3-aminophenoxy) benzene to the pyromellitic dianhydride is 2:5: 7.
Preferably, in the grinding process in the step (2), the rotation speed of the pestle of the micro powder grinder is set at 100rpm, and the rotation speed of the mortar is set at 8 rpm.
Preferably, the mixing ratio of the chrome corundum to the cubic boron nitride in the step (2) is 4: 1.
Preferably, the component of the wetting agent in the step (3) is vinyl bis stearamide.
Preferably, the ingredient of the colorant in the step (3) is iron oxide red.
Preferably, the filler in the step (3) is composed of Cu powder, Zr and Al2O3And SiO2The mixture of (1), Cu powder, Zr, Al2O3And SiO2In a ratio of 3:1:2: 1.
The wear-resistant sheet resin cutting disc comprises the following components in parts by weight:
61 parts of abrasive, 23 parts of bonding agent, 0.7 part of wetting agent, 0.6 part of coloring agent and 14.7 parts of filling material
The invention has at least the following beneficial effects:
the invention provides a wear-resistant sheet resin cutting slice and a preparation method thereof, wherein 4, 4' -bis (4-amino phenoxymethyl) triphenylamine, 1, 3-bis (3-amino phenoxyl) benzene and pyromellitic dianhydride are polymerized to prepare polyimide resin which is used as a bonding agent to be mixed with abrasive, wetting agent, coloring agent and filler to prepare the polyimide resin cutting slice The heat resistance and the wear resistance of the obtained product are improved to a great extent, the service life of the cutting blade is prolonged, and the product is high in elasticity and strength and suitable for high-speed grinding.
Drawings
FIG. 1 is a scheme for synthesis of polyimide resin.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The preparation method of the wear-resistant sheet resin cutting disc comprises the following steps:
step (1), preparing a polyimide resin binder:
polymerizing 4, 4' -bis (4-aminophenoxymethyl) triphenylamine, 1, 3-bis (3-aminophenoxy) benzene and pyromellitic dianhydride to prepare polyimide resin serving as a bonding agent for later use, wherein the specific preparation process comprises the following steps: respectively adding 1mmol of 4, 4' -bis (4-aminophenoxymethyl) triphenylamine, 2.5mmol of 1, 3-bis (3-aminophenoxy) benzene and 3.5mmol of pyromellitic dianhydride into a three-necked bottle, adding a magnetic stirrer, measuring 80ml of N-methylpyrrolidone into the three-necked bottle to serve as a reaction solvent, adding 0.24mmol of isoquinoline into the three-necked bottle to serve as a catalyst, heating to 200 ℃ under the protection of nitrogen, keeping constant temperature, and carrying out reflux reaction for 4 hours to obtain polyimide resin;
wherein the molar ratio of 4, 4' -bis (4-aminophenoxymethyl) triphenylamine, 1, 3-bis (3-aminophenoxy) benzene and pyromellitic dianhydride is 2:5: 7;
wherein, the molecular formula of the 4, 4' -bis (4-amino phenoxymethyl) triphenylamine is as follows:
wherein, the molecular formula of the 1, 3-bis (3-aminophenoxy) benzene is as follows:
wherein the molecular formula of the pyromellitic dianhydride is as follows:
wherein the molecular formula of the polyimide resin is as follows:
wherein m and n are polymerization degrees, m is more than 1 and less than 30, and n is more than 1 and less than 30;
wherein, the synthetic route of the polyimide resin is shown in figure 1;
step (2), abrasive pretreatment:
selecting chromium corundum and cubic boron nitride, crushing, grinding by a micro powder grinder, setting the rotating speed of a grinding rod of the micro powder grinder at 100rpm, setting the rotating speed of a mortar at 8rpm, and mixing the chromium corundum and the cubic boron nitride with the screened grain diameter of 20-40 um according to the ratio of 4:1 to serve as grinding materials for later use;
step (3), mixing materials:
weighing the abrasive, the bonding agent, the wetting agent, the coloring agent and the filler according to a certain mass part, and adding the materials into a stirring device for mixing and stirring to obtain a mixed material;
wherein, the wetting agent is composed of vinyl bis stearamide, which improves the bonding strength of the resin and the abrasive;
wherein, the coloring agent is iron oxide red which is mainly used for coloring the cutting piece;
wherein the filler comprises Cu powder, Zr and Al2O3And SiO2The mixture of (1), Cu powder, Zr, Al2O3And SiO2The ratio of the cutting disc to the cutting disc is 3:1:2:1, and the cutting disc is mainly used for improving the hardness, strength, wear resistance and heat resistance of the cutting disc;
and (4) pressing the resin cutting sheet:
adding the mixed material into a pressing dieSpreading and flattening, and pressurizing at 22N/mm2Keeping the pressure for 35s, and then taking out the cutting piece;
and (5) post-processing:
putting the cutting piece into a box, heating to 100 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating to 210 ℃ at a heating rate of 5 ℃/min, preserving heat for 7h, cooling to 120 ℃ at a speed of 3 ℃/min, preserving heat for 10min, cooling to room temperature at a speed of 10 ℃/min, and taking out the cutting piece.
The wear-resistant sheet resin cutting disc comprises the following components in parts by weight:
61 parts of abrasive, 23 parts of bonding agent, 0.7 part of wetting agent, 0.6 part of coloring agent and 14.7 parts of filling material.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The preparation method of the wear-resistant sheet resin cutting disc is characterized by comprising the following steps of:
step (1), preparing a polyimide resin binder:
polymerizing 4, 4' -bis (4-aminophenoxymethyl) triphenylamine, 1, 3-bis (3-aminophenoxy) benzene and pyromellitic dianhydride to prepare polyimide resin serving as a bonding agent for later use;
wherein the molecular formula of the polyimide resin is as follows:
wherein m and n are polymerization degrees, m is more than 1 and less than 30, and n is more than 1 and less than 30;
step (2), abrasive pretreatment:
selecting chrome corundum and cubic boron nitride, crushing, grinding by a micro powder grinder, and mixing the screened chrome corundum with the grain diameter of 20-40 um and the cubic boron nitride according to a certain proportion to serve as grinding materials for later use;
step (3), mixing materials:
weighing the abrasive, the bonding agent, the wetting agent, the coloring agent and the filler according to a certain mass part, and adding the materials into a stirring device for mixing and stirring to obtain a mixed material;
and (4) pressing the resin cutting sheet:
adding the mixed material into a pressing die, spreading and flattening, and pressurizing at 22N/mm2Keeping the pressure for 35s, and then taking out the cutting piece;
and (5) post-processing:
putting the cutting piece into a box, heating to 100 ℃ at a heating rate of 3 ℃/min, preserving heat for 30min, heating to 210 ℃ at a heating rate of 5 ℃/min, preserving heat for 7h, cooling to 120 ℃ at a speed of 3 ℃/min, preserving heat for 10min, cooling to room temperature at a speed of 10 ℃/min, and taking out the cutting piece.
2. The method for producing a wear-resistant resin flake, according to claim 1, wherein: in the step (1), the molar ratio of 4, 4' -bis (4-aminophenoxymethyl) triphenylamine, 1, 3-bis (3-aminophenoxy) benzene and pyromellitic dianhydride is 2:5: 7.
3. The method for producing a wear-resistant resin flake, according to claim 1, wherein: in the grinding process in the step (2), the rotating speed of a grinding rod of the micro powder grinder is set at 100rpm, and the rotating speed of a mortar is set at 8 rpm.
4. The method for producing a wear-resistant resin flake, according to claim 1, wherein: the mixing ratio of the chrome corundum to the cubic boron nitride in the step (2) is 4: 1.
5. The method for producing a wear-resistant resin flake, according to claim 1, wherein: the component of the wetting agent in the step (3) is vinyl bis stearamide.
6. The method for producing a wear-resistant resin flake, according to claim 1, wherein: the colorant in the step (3) is iron oxide red.
7. The method for producing a wear-resistant resin flake, according to claim 1, wherein: the components of the filler in the step (3) are Cu powder, Zr and Al2O3And SiO2The mixture of (1), Cu powder, Zr, Al2O3And SiO2In a ratio of 3:1:2: 1.
8. Wear-resisting thin slice resin cutting piece, its characterized in that: the contents of the components are as follows according to parts by weight:
61 parts of abrasive, 23 parts of bonding agent, 0.7 part of wetting agent, 0.6 part of coloring agent and 14.7 parts of filling material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011201330.9A CN112223131A (en) | 2020-11-02 | 2020-11-02 | Wear-resistant sheet resin cutting sheet and preparation method thereof |
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| CN202011201330.9A CN112223131A (en) | 2020-11-02 | 2020-11-02 | Wear-resistant sheet resin cutting sheet and preparation method thereof |
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| CN109438703A (en) * | 2018-11-05 | 2019-03-08 | 株洲时代新材料科技股份有限公司 | Black polyamide microballoon and preparation method thereof and preparation method containing its film |
| CN111571463A (en) * | 2020-05-21 | 2020-08-25 | 淄博元升磨料磨具有限公司 | High-efficiency wear-resistant resin grinding wheel and preparation method and application thereof |
| CN112011182A (en) * | 2020-08-13 | 2020-12-01 | 乳源东阳光氟树脂有限公司 | Polyimide film and preparation method thereof |
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2020
- 2020-11-02 CN CN202011201330.9A patent/CN112223131A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5638811B2 (en) * | 1976-02-25 | 1981-09-09 | ||
| US20100221990A1 (en) * | 2005-09-09 | 2010-09-02 | Chien-Min Sung | Methods of Bonding Superabrasive Particles in an Organic Matrix |
| CN1821338A (en) * | 2006-03-29 | 2006-08-23 | 山东久隆高分子材料有限公司 | Resin adhesive for diamond grinding wheel |
| CN101434827A (en) * | 2008-12-17 | 2009-05-20 | 厦门致力金刚石工具有限公司 | Grinding medium containing ceramic particle, preparation and use thereof |
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| CN103998501A (en) * | 2011-12-19 | 2014-08-20 | 纳幕尔杜邦公司 | Polyimide resin composition |
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| CN112011182A (en) * | 2020-08-13 | 2020-12-01 | 乳源东阳光氟树脂有限公司 | Polyimide film and preparation method thereof |
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Application publication date: 20210115 |