CN113894711A - Diamond grinding wheel for grinding automobile glass and preparation method thereof - Google Patents
Diamond grinding wheel for grinding automobile glass and preparation method thereof Download PDFInfo
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- CN113894711A CN113894711A CN202111428384.3A CN202111428384A CN113894711A CN 113894711 A CN113894711 A CN 113894711A CN 202111428384 A CN202111428384 A CN 202111428384A CN 113894711 A CN113894711 A CN 113894711A
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- powder
- grinding wheel
- diamond
- grinding
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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
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/346—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties utilised during polishing, or grinding operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
- B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
- B24D3/10—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements for porous or cellular structure, e.g. for use with diamonds as abrasives
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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
- B24D3/34—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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention relates to a diamond grinding wheel for grinding automobile glass and a preparation method thereof, wherein the raw materials of the diamond grinding wheel comprise a metal bond, diamond and a pore-forming agent; the grinding wheel comprises the following raw materials in percentage by mass: 60-85% of Co powder, 10-25% of Sn powder, 0.5-5% of diamond and 0-5% of pore-forming agent; the metal binder is at least one of pure Co, Sn element powder and Co-Sn prealloyed powder. The diamond grinding wheel disclosed by the invention can effectively reduce the sintering temperature and time, remarkably improve the holding force of the matrix on the diamond, and has good self-sharpening property and shape retention property. The diamond grinding wheel has wide application prospect in grinding automobile glass, and has the advantages of higher grinding efficiency, better edging quality, longer service life and the like compared with the traditional Fe-Co-Cu-Sn based glass grinding wheel.
Description
Technical Field
The invention belongs to the technical field of grinding tool abrasive grinding, and particularly relates to a diamond grinding wheel for grinding automobile glass.
Background
The automobile glass generally adopts toughened glass with high strength, large bearing capacity, impact resistance and good thermal stability, belongs to typical hard and brittle difficult-to-process materials, and the strength limit of the toughened glass is very close to the elastic limit, so that when the load borne by the glass slightly exceeds the elastic limit, fracture damage can occur, pits and cracks are often generated on the processing surface, the performance of the glass is restrained to a certain degree, and the automobile glass is large-curved-surface anisotropic glass with certain radian at the edge. Therefore, due to the hard and brittle characteristics of the automobile glass and the special geometric shape of the edge, the grinding process is complex, the efficiency is low, the cost is high, and the edging quality is poor.
The superhard material grinding tool has the advantages of high hardness, good wear resistance, good thermal stability and the like, and is widely applied to the field of machining. The superhard material grinding tool is formed by consolidating a bonding agent and an abrasive into a certain shape, so that the superhard material grinding tool has certain strength and hardness. The selection of the bonding agent directly influences the performance of the grinding tool, if the selection of the bonding agent is not good, a series of problems can occur in the grinding process, for example, when the holding force of the tire body on the grinding material is not enough, the grinding material can fall off too fast in the grinding process; the grinding tool has poor self-sharpening performance or low porosity, so that the grinding tool is easy to block during grinding, and the like, which not only cause low grinding efficiency, poor grinding quality and short service life of the grinding tool, but also cause serious waste of grinding materials. Co is used as a bonding agent with the best comprehensive performance, and has unique characteristics with diamond, so that the Co-based diamond grinding agent has wide application prospect in the field of grinding high-end automobile glass. Patent 201110157561.9 discloses a grinding glass diamond grinding wheel and a method for manufacturing the same, wherein the matrix powder comprises pre-alloyed powder of Cu75-85 wt% and Sn15-25 wt%, but the diamond abrasive is easy to be detached during use due to poor wettability of Cu and diamond and low holding force. In addition, the copper-based binder has poor self-sharpening property and low porosity, and is easily blocked during grinding, so that the processing efficiency is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the diamond grinding wheel which has good self-sharpening performance and shape retention performance and has strong holding force of a tire body on diamond grinding materials. In addition, the diamond grinding wheel is mainly applied to grinding of automobile glass, and compared with the traditional Fe-Co-Cu-Sn-based glass grinding wheel, the diamond grinding wheel has the advantages of higher grinding efficiency, better edging quality, longer service life and the like, and is particularly more remarkable in grinding of high-end and special automobile glass.
The invention is realized by the following technical scheme:
a diamond grinding wheel for grinding automobile glass is disclosed, wherein the diamond grinding wheel comprises the following raw materials in percentage by mass: 60-85% of Co powder, 10-25% of Sn powder, 0.5-5% of diamond and 0-5% of pore-forming agent.
The diamond grinding wheel provided by the invention comprises a metal bonding agent, diamond and a pore-forming agent, wherein the metal bonding agent is at least one of pure Co, Sn element powder and Co-Sn prealloying powder; the particle size range of the metal bonding agent powder is 1-50 microns, and the oxygen content of the powder is less than 0.2%.
The pore-forming agent is one of graphite, Si powder and alumina hollow spheres.
The preparation method of the diamond grinding wheel specifically comprises the following steps:
step 1: weighing raw materials according to the proportion of claim 1;
step 2: placing the raw materials weighed in the step 1 into a three-dimensional mixer for mixing for 12-24 hours to uniformly mix the raw materials;
and step 3: adding 3-5% of forming agent and a proper amount of solvent into the powder obtained in the step 2, sieving the mixture by a 30-mesh sieve for granulation, and drying the granulated powder in a drying oven at the drying temperature of 75-95 ℃;
and 4, step 4: pouring the mixture powder obtained in the step (3) into a circular ring die, placing the circular ring die on a hot press for hot press molding, wherein the final sintering temperature is 600-900 ℃, the temperature is kept for 30-60 minutes, and the sintering pressure is 15-25 Mpa;
and 5: brazing the grinding wheel ring obtained in the step 4 on a steel substrate by adopting Ag-based brazing filler metal and a welding flux at the brazing temperature of 500-600 ℃; and then, the prepared grinding wheel is subjected to shape modification and finish machining.
The invention has the beneficial effects that:
1. cobalt is used as a bonding agent with the best comprehensive performance, has good wettability to diamond, large bonding force, good toughness, good self-sharpening property and better wear resistance, and the bonding mode of cobalt and diamond grinding materials is the superposition of mechanical mosaic bonding and chemical bond bonding, so that the holding force of a matrix to diamond is stronger. The cobalt-based bonding agent has good formability, sinterability and high-temperature performance, the bending strength of the tire body can be improved, the tin element has low melting point, the cobalt-based bonding agent is introduced into the cobalt-based bonding agent, the sintering temperature and the sintering time of the cobalt-based bonding agent can be reduced, diamond can not be damaged due to overhigh temperature in the sintering process, moreover, the cobalt and the tin can easily form intermetallic compounds, the holding force of the tire body on the diamond can be further improved, the cutting effect and the sharpness of a grinding tool are improved, and the cobalt-based bonding agent has wide application prospect in the field of automobile glass grinding processing.
2. The invention adopts the pre-alloyed powder and carries out granulation by adding a proper amount of forming agent and a proper amount of solvent, so that the obtained powder is not easy to agglomerate and has better fluidity, and simultaneously, the segregation of components can be avoided, thereby improving the strength and hardness of the matrix and improving the holding force of the matrix on the diamond abrasive. In addition, the use of the pre-alloyed powder also makes it possible to further reduce the sintering temperature and the sintering time. The diamond grinding wheel prepared by the method has uniform tissue and stable performance, and is suitable for application in automobile glass grinding.
Drawings
FIG. 1 is an SEM photograph of the microstructure of the diamond wheel in example 1
FIG. 2 is an SEM photograph of the microstructure of the diamond wheel in example 2
FIG. 3 is an SEM photograph of the microstructure of the diamond wheel in example 3
The specific implementation mode is as follows:
the preparation and processing properties of the present invention are illustrated by specific examples, and the advantages and effects of the present invention will be fully understood by those skilled in the art from the disclosure of the present specification.
Example 1
1) Putting 70% of Co powder with the granularity of 1-50 microns and the oxygen content of less than 0.2%, 25% of pure powder, 2% of diamond and 3% of graphite into a three-dimensional mixer for mixing for 14 hours to obtain mixture powder;
2) adding 4% of a forming agent and a proper amount of a solvent into the mixture powder obtained in the step 1, sieving the mixture powder by a 30-mesh sieve for granulation, and placing the granulated powder in a drying oven for drying, wherein the drying temperature is 78 ℃;
3) pouring the mixture powder obtained in the step 2 into a circular ring die, placing the circular ring die on a hot press for hot press molding, and finally keeping the sintering temperature at 850 ℃ for 45 minutes at the sintering pressure of 20 Mpa;
4) brazing the grinding wheel ring obtained in the step 3 on a steel matrix by adopting Ag-based brazing filler metal and a welding flux at the brazing temperature of 520 ℃; and then, the prepared grinding wheel is subjected to shape modification and finish machining.
Example 2
1) Placing 80% of Co powder, 15% of Sn powder, 1% of diamond and 4% of graphite with the granularity of 1-50 microns and the oxygen content of less than 0.2% into a three-dimensional mixer for mixing for 18 hours to obtain mixture powder;
2) adding 3% of forming agent and a proper amount of solvent into the mixture powder obtained in the step 1, sieving the mixture powder by a 30-mesh sieve for granulation, and placing the granulated powder in a drying box for drying, wherein the drying temperature is 78 ℃;
3) pouring the mixture powder obtained in the step 2 into a circular ring die, placing the circular ring die on a hot press for hot press molding, and finally keeping the sintering temperature at 650 ℃ for 40 minutes at the sintering pressure of 25 Mpa;
4) brazing the grinding wheel ring obtained in the step 3 on a steel matrix by adopting Ag-based brazing filler metal and a welding flux at the brazing temperature of 550 ℃; and then, the prepared grinding wheel is subjected to shape modification and finish machining.
Example 3
1) Placing 80% of Co powder, 15% of Sn powder, 2% of diamond and 3% of graphite with the granularity of 1-50 microns and the oxygen content of less than 0.2% into a three-dimensional mixer for mixing for 18 hours to obtain mixture powder;
2) adding 3% of forming agent and a proper amount of solvent into the mixture powder obtained in the step 1, sieving the mixture powder by a 30-mesh sieve for granulation, and placing the granulated powder in a drying box for drying, wherein the drying temperature is 78 ℃;
3) pouring the mixture powder obtained in the step 2 into a circular ring die, placing the circular ring die on a hot press for hot press molding, and finally keeping the sintering temperature at 850 ℃ for 30 minutes at the sintering pressure of 25 Mpa; 4) Brazing the grinding wheel ring obtained in the step 3 on a steel matrix by adopting Ag-based brazing filler metal and a welding flux at the brazing temperature of 580 ℃; and then, the prepared grinding wheel is subjected to shape modification and finish machining.
Claims (4)
1. A diamond grinding wheel for grinding automobile glass is characterized in that raw materials of the diamond grinding wheel comprise a metal bond, diamond and a pore-forming agent; the diamond grinding wheel comprises the following raw materials in percentage by mass: 60-85% of Co powder, 10-25% of Sn powder, 0.5-5% of diamond and 0-5% of pore-forming agent.
2. The diamond grinding wheel according to claim 1, wherein the metal bond is at least one of pure Co, Sn element powder and Co-Sn prealloyed powder, and the pore-forming agent is one of graphite, Si powder and alumina hollow spheres.
3. The metal bond of claim 1, wherein the metal bond powder has a particle size in the range of 1-50 microns and a powder oxygen content of less than 0.2%.
4. The diamond grinding wheel according to claim 1, wherein the preparation method of the diamond grinding wheel comprises the following steps:
step 1: weighing raw materials according to the proportion of claim 1;
step 2: placing the raw materials weighed in the step 1 into a three-dimensional mixer for mixing for 12-24 hours to uniformly mix the raw materials;
and step 3: adding 3-5% of forming agent and a proper amount of solvent into the powder obtained in the step 2, sieving the mixture by a 30-mesh sieve for granulation, and drying the granulated powder in a drying oven at the drying temperature of 75-95 ℃;
and 4, step 4: pouring the mixture powder obtained in the step (3) into a circular ring die, placing the circular ring die on a hot press for hot press molding, wherein the final sintering temperature is 600-900 ℃, the temperature is kept for 30-60 minutes, and the sintering pressure is 15-25 Mpa;
and 5: brazing the grinding wheel ring obtained in the step 4 on a steel substrate by adopting Ag-based brazing filler metal and a welding flux at the brazing temperature of 500-600 ℃; and then, the prepared grinding wheel is subjected to shape modification and finish machining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111428384.3A CN113894711A (en) | 2021-11-26 | 2021-11-26 | Diamond grinding wheel for grinding automobile glass and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111428384.3A CN113894711A (en) | 2021-11-26 | 2021-11-26 | Diamond grinding wheel for grinding automobile glass and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113894711A true CN113894711A (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111428384.3A Withdrawn CN113894711A (en) | 2021-11-26 | 2021-11-26 | Diamond grinding wheel for grinding automobile glass and preparation method thereof |
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| Country | Link |
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| CN (1) | CN113894711A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114536230A (en) * | 2022-01-25 | 2022-05-27 | 长沙市萨普新材料有限公司 | Diamond grinding wheel for TiCN-based metal ceramic machining and preparation method thereof |
| CN115056155A (en) * | 2022-07-11 | 2022-09-16 | 河北锟洲科技有限公司 | Method for manufacturing porous metal bond grinding wheel |
-
2021
- 2021-11-26 CN CN202111428384.3A patent/CN113894711A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114536230A (en) * | 2022-01-25 | 2022-05-27 | 长沙市萨普新材料有限公司 | Diamond grinding wheel for TiCN-based metal ceramic machining and preparation method thereof |
| CN115056155A (en) * | 2022-07-11 | 2022-09-16 | 河北锟洲科技有限公司 | Method for manufacturing porous metal bond grinding wheel |
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Application publication date: 20220107 |
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