CN104882757A - Metal electrographite brush having high precision and good reliability and preparation method of metal electrographite brush - Google Patents
Metal electrographite brush having high precision and good reliability and preparation method of metal electrographite brush Download PDFInfo
- Publication number
- CN104882757A CN104882757A CN201510248057.8A CN201510248057A CN104882757A CN 104882757 A CN104882757 A CN 104882757A CN 201510248057 A CN201510248057 A CN 201510248057A CN 104882757 A CN104882757 A CN 104882757A
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- CN
- China
- Prior art keywords
- metal
- brush
- parts
- copper
- electrographite brush
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
- H01R39/20—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof
- H01R39/22—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof incorporating lubricating or polishing ingredient
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
The invention discloses a metal electrographite brush having high precision and good reliability. The metal electrographite brush is characterized by being prepared from raw materials by weight: 40-60 parts of crystalline flake graphite, 18-28 parts of pitch, 20-30 parts of tungsten disulfide, 3-5 parts of iron powder, 6-9 parts of copper sulphide, 11-15 parts of manganese carbonate, 7-9 parts of copper-antimony alloy powder and an appropriate amount of oleic acid. By adding the copper sulphide, an effect of enhancing conductivity and hardness of brush material is enhanced. By adding manganese carbonate, effects of reducing sintering temperature and improving material compactness are improved. According to the invention, the metal electrographite brush prepared by adopting the scientific formula and a reasonable material proportion has good hardness and conductivity, is high in accuracy, stable in quality, good in reliability and worth of promotion.
Description
Technical field
the present invention relates to a kind of brush material, be specifically related to strong metal graphite brush of a kind of accuracy high reliability and preparation method thereof.
Background technology
Brush does sliding contact with movement parts and forms a kind of conductive component be electrically connected.Brush is for commutator or slip ring, as the sliding contact body importing and exporting electric current.Its conduction, heat conduction and greasy property well, and have the instinct of certain mechanical strength and commutation property spark.Nearly all direct current machine and commutating machine all use brush, and it is the important composition parts of motor.Domestic brush for electromachine product compared with producer of the same trade of advanced developed country product, also exist that product specification is low, useful life is short, produce when running spark greatly, easily pull slip ring, greasy property poor, the defect such as can not to exchange.The metal material of China and the composite material application of Inorganic Non-metallic Materials also rest on floor level at present, the technique of some product also maintains even absolutely applies mechanically, and this brush material can not meet the requirement of development of modern industry far away.
At present, the all imports of domestic CM9 brush, the Ji Jia large enterprise of our province every year will from external Imported Electrical Brush about more than 20,000,000 yuan, Imported Electrical Brush is long for delivery date, price is high, safeguard inconvenience, going wrong can not punctual delivery, serious words can cause enterprise to stop production, lose huge, for this phenomenon, present inventor improves the structural behaviour of domestic brush by the accumulation of many experiments and experience, improve intensity and the uniformity of material, not dry linting, increase the resistance to wear of material, reduce the wear extent of material, improve the combination property of material, fill up the blank of domestic brush, substitute import, there is very high Social benefit and economic benefit.
Summary of the invention
The object of this invention is to provide strong metal graphite brush of a kind of accuracy high reliability and preparation method thereof.
In order to realize object of the present invention, the present invention is by following scheme implementation:
The metal graphite brush that accuracy high reliability is strong, is made up of the raw material of following weight portion: crystalline flake graphite 40-60, pitch 18-28, tungsten disulfide 20-30, iron powder 3-5, copper sulfide 6-9, manganese carbonate 11-15, copper-antimony alloy powder 7-9, oleic acid are appropriate;
The metal graphite brush that a kind of precision high reliability of the present invention is strong, be made up of following concrete steps:
(1) by asphalt heating to melting, add iron powder mixing and stirring, namely obtain modified pitch after cooling for subsequent use;
(2) by modified pitch carbon tetrachloride dissolve obtain the solution that bitumen content is 2%, get 30-40% modified asphalt solutions and copper-antimony alloy powder mixing and stirring, then with tungsten disulfide mixing and stirring, be added in baking oven after removing solvent for subsequent use;
(3) by after the crushing material of step (2) gained and all the other remaining mixing of materials, mechanical agitation 3-4 hour in batch mixer, add remaining modified asphalt solutions again to stir, then be added in vacuum drying chamber dry except desolventizing, after 140 mesh sieves, vacuum-sintering 200 minutes under 400-600 ° of C, Temperature fall is for subsequent use to room temperature;
(4) inserting after the blank of step (3) being pulverized 200 mesh sieves is equipped with in the container of oleic acid; flood after 2-4 hour, Separation of Solid and Liquid, by compressing for solid pressurize 5 minutes under 25-30MPa; and utilize nitrogen as protective gas, under 800-1000 ° of C, sinter 1-2 hour.
In copper-antimony alloy powder of the present invention, the content of antimony is 49-51%.
Advantage of the present invention is: the present invention adds iron powder and carries out modification and improve caking property and the conductivity enhancing motor material in pitch, reduce the wearing and tearing that brush spark discharge causes, the activating agent oleic acid added is to blank impregnation process, have activated the bioactive molecule at graphitic molecules layer edge, itself and graphite is made to form good chemisorption, promote that brush forms oxide-film, improve the wear-resisting and uniformity of brush, pressing pressure can also be reduced, improve the density uniformity of green compact, the tungsten disulfide added is by the modification of copper-antimony alloy powder, coefficient of friction is reduced and reaches maximum, effectively raise greasy property and resistance to wear, and can compactness be strengthened, prevent the characteristic of brush dry linting, the copper sulfide added has the effect strengthening brush material conductivity and hardness, the manganese carbonate added has reduction sintering temperature, improve the effect of material compactness, present invention employs the formula of science, metal graphite brush prepared by rational ratio has excellent hardness and conductivity, product accuracy is high, steady quality, reliability is strong, be worthy to be popularized.
Embodiment
Below by instantiation, the present invention is described in detail.
The metal graphite brush that accuracy high reliability is strong, is made up of the raw material of following weight portion (kilogram): crystalline flake graphite 58, pitch 23, tungsten disulfide 24, iron powder 4, copper sulfide 8, manganese carbonate 13, copper-antimony alloy powder 8, oleic acid are appropriate;
The metal graphite brush that a kind of precision high reliability of the present invention is strong, be made up of following concrete steps:
(1) by asphalt heating to melting, add iron powder mixing and stirring, namely obtain modified pitch after cooling for subsequent use;
(2) by modified pitch carbon tetrachloride dissolve obtain the solution that bitumen content is 2%, get 30% modified asphalt solutions and copper-antimony alloy powder mixing and stirring, then with tungsten disulfide mixing and stirring, be added in baking oven after removing solvent for subsequent use;
(3) by after the crushing material of step (2) gained and all the other remaining mixing of materials, mechanical agitation 3 hours in batch mixer, add remaining modified asphalt solutions again to stir, then be added in vacuum drying chamber dry except desolventizing, after 140 mesh sieves, vacuum-sintering 200 minutes under 500 ° of C, Temperature fall is for subsequent use to room temperature;
(4) inserting after the blank of step (3) being pulverized 200 mesh sieves is equipped with in the container of oleic acid; flood after 3 hours, Separation of Solid and Liquid, by compressing for solid pressurize 5 minutes under 27MPa; and utilize nitrogen as protective gas, under 1000 ° of C, sinter 2 hours.
In copper-antimony alloy powder of the present invention, the content of antimony is 50%.
The metal-graphite brush material performance index prepared according to embodiment are as follows:
Resistivity (μ Ω m): 4.9;
Rockwell hardness (10/588N): 83;
Attrition value (50 hours, mm): 0.18;
Coefficient of friction (50 hours): 0.16;
Contact drop (50 hours, V): 1.2 ± 40%.
Claims (3)
1. the metal graphite brush that an accuracy high reliability is strong, it is characterized in that, be made up of the raw material of following weight portion: crystalline flake graphite 40-60, pitch 18-28, tungsten disulfide 20-30, iron powder 3-5, copper sulfide 6-9, manganese carbonate 11-15, copper-antimony alloy powder 7-9, oleic acid are appropriate.
2. the metal graphite brush that a kind of precision high reliability is strong according to claim 1, is characterized in that, is made up of following concrete steps:
(1) by asphalt heating to melting, add iron powder mixing and stirring, namely obtain modified pitch after cooling for subsequent use;
(2) by modified pitch carbon tetrachloride dissolve obtain the solution that bitumen content is 2%, get 30-40% modified asphalt solutions and copper-antimony alloy powder mixing and stirring, then with tungsten disulfide mixing and stirring, be added in baking oven after removing solvent for subsequent use;
(3) by after the crushing material of step (2) gained and all the other remaining mixing of materials, mechanical agitation 3-4 hour in batch mixer, add remaining modified asphalt solutions again to stir, then be added in vacuum drying chamber dry except desolventizing, after 140 mesh sieves, vacuum-sintering 200 minutes under 400-600 ° of C, Temperature fall is for subsequent use to room temperature;
(4) inserting after the blank of step (3) being pulverized 200 mesh sieves is equipped with in the container of oleic acid; flood after 2-4 hour, Separation of Solid and Liquid, by compressing for solid pressurize 5 minutes under 25-30MPa; and utilize nitrogen as protective gas, under 800-1000 ° of C, sinter 1-2 hour.
3. the metal graphite brush that a kind of precision high reliability is strong according to claim 1-2, is characterized in that, in described copper-antimony alloy powder, the content of antimony is 49-51%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510248057.8A CN104882757A (en) | 2015-05-15 | 2015-05-15 | Metal electrographite brush having high precision and good reliability and preparation method of metal electrographite brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510248057.8A CN104882757A (en) | 2015-05-15 | 2015-05-15 | Metal electrographite brush having high precision and good reliability and preparation method of metal electrographite brush |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104882757A true CN104882757A (en) | 2015-09-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510248057.8A Pending CN104882757A (en) | 2015-05-15 | 2015-05-15 | Metal electrographite brush having high precision and good reliability and preparation method of metal electrographite brush |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104882757A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074875A (en) * | 2009-11-19 | 2011-05-25 | 杨长根 | Method for manufacturing electric brush used for industrial motor |
| CN102280790A (en) * | 2011-05-31 | 2011-12-14 | 苏州东南碳制品有限公司 | Motor brush for small household appliances and manufacturing method of motor brush |
-
2015
- 2015-05-15 CN CN201510248057.8A patent/CN104882757A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074875A (en) * | 2009-11-19 | 2011-05-25 | 杨长根 | Method for manufacturing electric brush used for industrial motor |
| CN102280790A (en) * | 2011-05-31 | 2011-12-14 | 苏州东南碳制品有限公司 | Motor brush for small household appliances and manufacturing method of motor brush |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150902 |
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| RJ01 | Rejection of invention patent application after publication |