CN108907205B - Manufacturing process of composite material electric brush - Google Patents
Manufacturing process of composite material electric brush Download PDFInfo
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- CN108907205B CN108907205B CN201810717597.XA CN201810717597A CN108907205B CN 108907205 B CN108907205 B CN 108907205B CN 201810717597 A CN201810717597 A CN 201810717597A CN 108907205 B CN108907205 B CN 108907205B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000002131 composite material Substances 0.000 title claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 48
- 239000002245 particle Substances 0.000 claims abstract description 47
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000002156 mixing Methods 0.000 claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 23
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000011300 coal pitch Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 7
- 239000010439 graphite Substances 0.000 claims abstract description 7
- 229910052786 argon Inorganic materials 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims abstract description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000007605 air drying Methods 0.000 claims description 5
- 238000004939 coking Methods 0.000 claims description 5
- 239000013590 bulk material Substances 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000011261 inert gas Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/12—Manufacture of brushes
Abstract
The invention discloses a manufacturing process of a composite material electric brush, which comprises the following steps: s1, raw materials; s2, graphite powder, coke powder, tungsten disulfide powder and modified coal pitch are uniformly mixed according to the weight part ratio of 1-1.5:1-2:0.2-0.4:0.6-1, then heated to 120-150 ℃, and then poured into a granulator to be prepared into particles with the particle size of 20-40 mm, so as to obtain base particles; putting the base particles into a roasting furnace, introducing protective gas, heating to 2600-3000 ℃, keeping for 4-6 hours, graphitizing, and crushing to particles with the particle size not larger than 5 mm; s3, preparing a working layer raw material, a transition layer raw material and a welding layer raw material; s4, respectively mixing the working layer raw material, the transition layer raw material and the welding layer raw material according to the thickness ratio of 15-20: laying the graphite grinding tool with the thickness of 6-8:3-4 in sequence, introducing argon as a protective gas, and performing hot-press molding at 850-950 ℃ and under the pressure of 30-45MPa for 20-30min to obtain a block material; and S5, processing the block material into a brush base body.
Description
Technical Field
The invention relates to an electric brush, in particular to a manufacturing process of a composite material electric brush.
Background
Brushes (Brush) are an important component of an electric machine, responsible for conducting electric current between a rotating and a stationary part. Since it is made of graphite, it is also called carbon brush.
The silver brush material is an indispensable electrical element in aviation and aerospace instrument systems, automatic control and motors, electric and circuit devices, and is used for important tasks of transmitting electric energy, electric signals, contacting and breaking circuits and the like. Therefore, the current silver brush has higher requirements on the performances of low wear rate, long service life, low resistance, low friction heat generation performance, low electric noise and the like.
Although the existing products have the products which can reach the standards, the manufacturing cost is high, the process is complex, the price of the finished product is higher, and the market competition of manufacturers is not facilitated.
Accordingly, the applicant has proposed a manufacturing process for a composite brush that is manufactured by a new process and has finished product performance no worse than the mainstream products on the market.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a manufacturing process for a composite brush.
In order to achieve the above object, the present invention provides a manufacturing process of a composite material brush, comprising the steps of:
s1, taking the raw material modified coal pitch as a raw material, wherein the softening point is 90-100 ℃, the coking value is more than or equal to 55%, the ash content is less than or equal to 0.20%, and the fineness is 100-120 meshes at normal temperature;
graphite powder with the granularity not more than 2 mu m;
coke powder, 100-120 mesh;
the fineness of the tungsten disulfide powder is 100-mesh and 120-mesh;
silver powder with fineness of 90-100 meshes and purity of 99.9%;
electrolytic copper powder with fineness of 90-100 meshes and purity of 99.9%;
the metal copper powder has the fineness of 90-100 meshes and the purity of 99.9 percent;
s2, graphite powder, coke powder, tungsten disulfide powder and modified coal pitch are uniformly mixed according to the weight portion ratio of 1-1.5:1-2:0.2-0.4: 0.6-1; during mixing, absolute ethyl alcohol can be added for wet mixing, and after mixing, the mixed carbon powder is obtained by air drying;
heating the mixed carbon powder to 120-150 ℃ to soften the modified coal pitch, and then pouring the modified coal pitch into a granulator to prepare particles with the particle size of 20-40 mm to obtain base particles;
putting the base particles into a roasting furnace, introducing protective gas (inert gas or nitrogen), heating to 2600-3000 ℃, keeping for 4-6 hours, graphitizing, and crushing to particles with the particle size not larger than 5 mm;
s3, uniformly mixing the silver powder, the electrolytic copper powder, the tungsten disulfide powder and the base particles treated by the S2 according to the weight part ratio of 3-4:3-4:1-2:0.5-1 to obtain a working layer raw material;
uniformly mixing silver powder and tungsten disulfide powder according to the weight part ratio of 1-2:0.2-0.6 to obtain a transition layer raw material;
silver powder and metal copper powder are mixed according to the weight portion ratio of 3-4: 2-3 to obtain a welding layer raw material;
s4, respectively mixing the working layer raw material, the transition layer raw material and the welding layer raw material according to the thickness ratio of 15-20: laying the materials in a graphite grinding tool in a thickness of 6-8:3-4 in sequence, introducing argon as a protective gas, hot-pressing and molding at 850-950 ℃ under the pressure of 30-45MPa for 20-30min to obtain a block material, wherein preferably, the size of the block material is as follows: 20 mm, 30 mm and 25 mm;
and S5, processing the block material into a brush base body.
The invention has the beneficial effects that: the invention has simple process, low manufacturing cost, and the performance of the finished product is not weaker than that of the mainstream finished product in the market, even better than that of the imported finished product. Therefore, larger profit margin can be brought to enterprises, and the competitiveness of the enterprises is improved.
Detailed Description
The invention is further illustrated by the following examples:
example one
A process for manufacturing a composite brush comprising the steps of:
s1, taking the raw material modified coal pitch as a raw material, wherein the softening point is 90-100 ℃, the coking value is more than or equal to 55%, the ash content is less than or equal to 0.20%, and the fineness is 100-120 meshes at normal temperature;
graphite powder with the granularity not more than 2 mu m;
coke powder, 100-120 mesh;
the fineness of the tungsten disulfide powder is 100-mesh and 120-mesh;
silver powder with fineness of 90-100 meshes and purity of 99.9%;
electrolytic copper powder with fineness of 90-100 meshes and purity of 99.9%;
the metal copper powder has the fineness of 90-100 meshes and the purity of 99.9 percent;
s2, graphite powder, coke powder, tungsten disulfide powder and modified coal pitch, wherein the weight ratio of the S2 to the graphite powder to the coke powder to the tungsten disulfide powder to the modified coal pitch is 1:2:0.8: 0.4:1, uniformly mixing; adding absolute ethyl alcohol for wet mixing during mixing, and air-drying after mixing to obtain mixed carbon powder;
heating the mixed carbon powder to 130 ℃ to soften the modified coal pitch, and then pouring the modified coal pitch into a granulator to prepare particles with the particle size of 30 mm to obtain base particles;
putting the base particles into a roasting furnace, introducing protective gas (inert gas or nitrogen), heating to 2800 ℃, keeping for 5 hours to graphitize the base particles, and crushing the base particles to particles with the particle size of not more than 3 mm;
s3, uniformly mixing the silver powder, the electrolytic copper powder, the tungsten disulfide powder and the base particles treated by the S2 according to the weight portion ratio of 4:4:1.5:0.8 to obtain a working layer raw material;
uniformly mixing silver powder and tungsten disulfide powder according to the weight part ratio of 1.5:0.5 to obtain a transition layer raw material;
silver powder and metal copper powder are mixed according to the weight portion ratio of 3.5: 3, uniformly mixing the raw materials to obtain a welding layer raw material;
s4, respectively mixing the working layer raw material, the transition layer raw material and the welding layer raw material according to the thickness ratio of 18: 7:4, sequentially paving the materials in a graphite grinding tool, introducing argon as a protective gas, and performing hot press molding at 900 ℃ and 35MPa for 30min to obtain a block material;
and S5, processing the block material into a brush base body.
Example two
A process for manufacturing a composite brush comprising the steps of:
s1, taking the raw material modified coal pitch as a raw material, wherein the softening point is 90-100 ℃, the coking value is more than or equal to 55%, the ash content is less than or equal to 0.20%, and the fineness is 100-120 meshes at normal temperature;
graphite powder with the granularity not more than 2 mu m;
coke powder, 100-120 mesh;
the fineness of the tungsten disulfide powder is 100-mesh and 120-mesh;
silver powder with fineness of 90-100 meshes and purity of 99.9%;
electrolytic copper powder with fineness of 90-100 meshes and purity of 99.9%;
the metal copper powder has the fineness of 90-100 meshes and the purity of 99.9 percent;
s2, graphite powder, coke powder, tungsten disulfide powder and modified coal pitch are uniformly mixed according to the weight part ratio of 1.5:1.5:0.3: 1; during mixing, absolute ethyl alcohol can be added for wet mixing, and after mixing, the mixed carbon powder is obtained by air drying;
heating the mixed carbon powder to 140 ℃ to soften the modified coal pitch, and then pouring the modified coal pitch into a granulator to prepare particles with the particle size of 35 mm to obtain base particles;
putting the base particles into a roasting furnace, introducing protective gas (inert gas or nitrogen), heating to 3000 ℃, keeping for 4 hours to graphitize the base particles, and crushing the base particles to particles with the particle size not larger than 3 mm;
s3, uniformly mixing the silver powder, the electrolytic copper powder, the tungsten disulfide powder and the base particles processed by the S2 according to the weight part ratio of 3:4:2: 1 to obtain a working layer raw material;
uniformly mixing silver powder and tungsten disulfide powder according to the weight part ratio of 2:0.5 to obtain a transition layer raw material;
silver powder and metal copper powder are mixed according to the weight portion ratio of 3.5: 2, uniformly mixing to obtain a welding layer raw material;
s4, respectively mixing the working layer raw material, the transition layer raw material and the welding layer raw material according to the thickness ratio of 20: laying the materials in a graphite grinding tool in sequence with the thickness of 6:3, introducing argon as protective gas, and performing hot press molding at 930 ℃ and under the pressure of 40MPa for 25min to obtain a block material;
and S5, processing the block-shaped material prepared in the S4 into a brush base body.
EXAMPLE III
A process for manufacturing a composite brush comprising the steps of:
s1, taking the raw material modified coal pitch as a raw material, wherein the softening point is 90-100 ℃, the coking value is more than or equal to 55%, the ash content is less than or equal to 0.20%, and the fineness is 100-120 meshes at normal temperature;
graphite powder with the granularity not more than 2 mu m;
coke powder, 100-120 mesh;
the fineness of the tungsten disulfide powder is 100-mesh and 120-mesh;
silver powder with fineness of 90-100 meshes and purity of 99.9%;
electrolytic copper powder with fineness of 90-100 meshes and purity of 99.9%;
the metal copper powder has the fineness of 90-100 meshes and the purity of 99.9 percent;
s2, graphite powder, coke powder, tungsten disulfide powder and modified coal pitch are uniformly mixed according to the weight portion ratio of 1.2:1.8:0.4: 1; during mixing, absolute ethyl alcohol can be added for wet mixing, and after mixing, the mixed carbon powder is obtained by air drying;
heating the mixed carbon powder to 150 ℃ to soften the modified coal pitch, and then pouring the modified coal pitch into a granulator to prepare particles with the particle size of 25 mm to obtain base particles;
putting the base particles into a roasting furnace, introducing protective gas (inert gas or nitrogen), heating to 2700 ℃, keeping for 6 hours to graphitize the base particles, and crushing the base particles to particles with the particle size not larger than 5 mm;
s3, uniformly mixing the silver powder, the electrolytic copper powder, the tungsten disulfide powder and the base particles processed by the S2 according to the weight portion ratio of 4:3.2:1.8: 1 to obtain a working layer raw material;
uniformly mixing silver powder and tungsten disulfide powder according to the weight part ratio of 1.2:0.4 to obtain a transition layer raw material;
silver powder and metal copper powder are mixed according to the weight portion ratio of 3.5: 2, uniformly mixing to obtain a welding layer raw material;
s4, respectively mixing the working layer raw material, the transition layer raw material and the welding layer raw material according to the thickness ratio of 16: laying the graphite grinding tool with the thickness of 6:4 in sequence, introducing argon as protective gas, and performing hot press molding at 950 ℃ and under the pressure of 45MPa for 20 min;
and S5, processing the block material into a brush base body.
The invention is not described in detail, but is well known to those skilled in the art.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (4)
1. A manufacturing process of a composite material brush is characterized by comprising the following steps:
s1, raw materials, modified coal pitch, graphite powder, coke powder, tungsten disulfide powder, silver powder, electrolytic copper powder and metal copper powder;
s2, graphite powder, coke powder, tungsten disulfide powder and modified coal pitch are uniformly mixed according to the weight part ratio of 1-1.5:1-2:0.2-0.4:0.6-1, then heated to 120-150 ℃ to soften the modified coal pitch, and then poured into a granulator to prepare particles with the particle size of 20-40 mm, so as to obtain base particles;
putting the base particles into a roasting furnace, introducing protective gas, heating to 2600-3000 ℃, keeping for 4-6 hours, graphitizing, and crushing to particles with the particle size not larger than 5 mm;
s3, uniformly mixing the silver powder, the electrolytic copper powder, the tungsten disulfide powder and the base particles treated by the S2 according to the weight part ratio of 3-4:3-4:1-2:0.5-1 to obtain a working layer raw material;
uniformly mixing silver powder and tungsten disulfide powder according to the weight part ratio of 1-2:0.2-0.6 to obtain a transition layer raw material;
silver powder and metal copper powder are mixed according to the weight portion ratio of 3-4: 2-3 to obtain a welding layer raw material;
s4, respectively mixing the working layer raw material, the transition layer raw material and the welding layer raw material according to the thickness ratio of 15-20: laying the graphite grinding tool with the thickness of 6-8:3-4 in sequence, introducing argon as a protective gas, and performing hot-press molding at 850-950 ℃ and under the pressure of 30-45MPa for 20-30min to obtain a block material;
and S5, processing the block material into a brush base body.
2. The manufacturing process of claim 1, wherein the requirements for each raw material in S1 are as follows:
the modified coal pitch has a softening point of 90-100 ℃, a coking value of not less than 55 percent, an ash content of not more than 0.20 percent and a fineness of 100-120 meshes at normal temperature;
graphite powder with the granularity not more than 2 mu m;
coke powder, 100-120 mesh;
the fineness of the tungsten disulfide powder is 100-mesh and 120-mesh;
silver powder with fineness of 90-100 meshes and purity of 99.9%;
electrolytic copper powder with fineness of 90-100 meshes and purity of 99.9%;
the fineness of the metal copper powder is 90-100 meshes, and the purity is 99.9%.
3. The process according to claim 1, wherein the step of mixing in S2 comprises adding absolute ethanol for wet mixing, and air-drying to obtain the mixed carbon powder.
4. The manufacturing process of claim 1, wherein the bulk material dimensions in S4 are: 20 mm, 30 mm and 25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810717597.XA CN108907205B (en) | 2018-07-03 | 2018-07-03 | Manufacturing process of composite material electric brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810717597.XA CN108907205B (en) | 2018-07-03 | 2018-07-03 | Manufacturing process of composite material electric brush |
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| Publication Number | Publication Date |
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| CN108907205A CN108907205A (en) | 2018-11-30 |
| CN108907205B true CN108907205B (en) | 2020-07-28 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388570C (en) * | 2006-05-27 | 2008-05-14 | 合肥工业大学 | Brush in composite material of carbon fiber and graphite based on silver |
| DE102006051678A1 (en) * | 2006-10-30 | 2008-05-15 | Schunk Modultechnik Gmbh | Sliding contact i.e. carbon brush, has two layers e.g. sliding surface-sided running layer and sliding surface lying layer, with surfaces turned towards each other, where lying layer consists of resistor material with resistance process |
| CN102263349A (en) * | 2011-06-10 | 2011-11-30 | 陕西科技大学 | Electric brush made of copper-graphite composite material and used for motor |
| CN102882101A (en) * | 2012-10-26 | 2013-01-16 | 海门市通达碳业有限公司 | Novel electric brush production technology |
| CN102904145A (en) * | 2012-10-26 | 2013-01-30 | 海门市通达碳业有限公司 | Production process of wear-resistant electric brush |
| CN103972758A (en) * | 2014-03-05 | 2014-08-06 | 台州昊泽碳制品有限公司 | Low-noise motor and electric brush combination |
| CN105130436B (en) * | 2015-08-25 | 2017-06-06 | 自贡东新电碳有限责任公司 | A kind of high resistivity carbon black base electrographite brush material preparation method |
| CN106505391B (en) * | 2015-09-08 | 2019-06-11 | 苏州东南碳制品有限公司 | A kind of material being used to prepare passenger car start and stop carbon brush used for electric engine |
| CN105236983B (en) * | 2015-10-20 | 2018-05-01 | 大同新成新材料股份有限公司 | A kind of method for preparing high-speed train pantograph slide plate carbon slipper of adopting new technology |
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2018
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