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Preparation method of brush for electric tool motor

A technology for electric tools and electric brushes, applied in the field of material science, can solve the problems of inability to meet the use requirements of electric brushes for electric tool motors, poor anti-electromagnetic interference performance, large impact sparks, etc., and achieves moderate resistivity and good product stability. , the effect of low spark level

Inactive Publication Date: 2018-03-09
SUZHOU DONSUN CARBONWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, at present, the general domestic brushes have poor stability, short life, large impact sparks, and poor anti-electromagnetic interference performance. Domestic carbon brush factories cannot meet the use requirements of electric tool motor brushes.

Method used

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  • Preparation method of brush for electric tool motor
  • Preparation method of brush for electric tool motor
  • Preparation method of brush for electric tool motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] 1. Prepare materials (parts) according to the following proportions by weight:

[0089]

[0090]

[0091] Wherein, the additive is one or a combination of molybdenum disulfide, tungsten disulfide and ferric oxide.

[0092] 2. Put natural graphite, artificial graphite, fluorinated graphite, silicon carbide, polytetrafluoroethylene, carbon fiber powder and additives in the kneading pot, turn on the rotating device of the kneading pot, and then add the graphene aqueous solution into the kneading pot by spraying. Make it evenly attached, turn on the heating for about 1.5h, raise the temperature to 130-140°C, stop kneading, add binder pitch, continue heating for hot kneading, and make the temperature uniformly rise to about 220°C for about 3 hours, then stop heating 2. Continue kneading and granulation. After about 1-2 hours, the matrix powder is obtained. After taking out the material, place it at room temperature, spread it evenly, with a thickness of ≤5cm, and let i...

Embodiment 2

[0102] 1. Prepare materials (parts) according to the following proportions by weight:

[0103]

[0104] Wherein, the additive is one or a combination of molybdenum disulfide, tungsten disulfide and ferric oxide.

[0105]2. Put natural graphite, artificial graphite, fluorinated graphite, silicon carbide, polytetrafluoroethylene, carbon fiber powder and additives in the kneading pot, turn on the rotating device of the kneading pot, and then add the graphene aqueous solution into the kneading pot by spraying. Make it evenly attached, turn on the heating for about 1.5h, raise the temperature to 130-140°C, stop kneading, add binder pitch, continue heating for hot kneading, and make the temperature uniformly rise to about 220°C for about 3 hours, then stop heating 2. Continue kneading and granulation. After about 1-2 hours, the matrix powder is obtained. After taking out the material, place it at room temperature, spread it evenly, with a thickness of ≤5cm, and let it stand for 5...

Embodiment 3

[0115] 1. Prepare materials (parts) according to the following proportions by weight:

[0116]

[0117] Wherein, the additive is one or a combination of molybdenum disulfide, tungsten disulfide and ferric oxide.

[0118] 2. Put natural graphite, artificial graphite, fluorinated graphite, silicon carbide, polytetrafluoroethylene, carbon fiber powder and additives in the kneading pot, turn on the rotating device of the kneading pot, and then add the graphene aqueous solution into the kneading pot by spraying. Make it evenly attached, turn on the heating for about 1.5h, raise the temperature to 130-140°C, stop kneading, add binder pitch, continue heating for hot kneading, and make the temperature uniformly rise to about 220°C for about 3 hours, then stop heating 2. Continue kneading and granulation. After about 1-2 hours, the matrix powder is obtained. After taking out the material, place it at room temperature, spread it evenly, with a thickness of ≤5cm, and let it stand for ...

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Abstract

The invention discloses a preparation method of a brush for an electric tool motor, relating to the field of materials. The method comprises the steps of: mixing base powder comprising an aqueous solution of graphene with a pitch binder uniformly under the heating condition to obtain a brush raw material mixture; crushing, screening and mixing the brush raw material mixture to obtain brush raw material mixture powder; adding the brush raw material mixture powder into a pressing mold and pressing to obtain a brush blank; roasting the brush blank to obtain an initial brush product; and processing the initial brush product to obtain a finished brush product. The brush for the electric tool has moderate resistivity, low brush running spark grade, good commutation performance, good product stability, excellent abrasion resistance and electromagnetic interference resistance, and is especially suitable for medium and low power angle grinder motors.

Description

technical field [0001] The invention relates to a method for preparing a brush for electric tool motors, and relates to the field of material science. Background technique [0002] The brush is a conductive part used in the motor to contact the commutator or slip ring to form an electrical connection, and is an important component of the motor. As a sliding contact body that imports and exports current, it has good electrical, thermal and lubricating properties, and has a certain mechanical strength and the instinct to suppress commutation sparks. It is widely used in various AC and DC generators, synchronous motors, battery DC motors, crane motor collector rings, various types of welding machines, etc. Almost all DC motors and commutation motors use brushes. [0003] With the development of science and technology, the types of motors and the working conditions of use are becoming more and more diverse, so various types of brushes are required to meet the various requiremen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R43/12H01R39/20
CPCH01R43/12H01R39/20
Inventor 郑海东殷玲吴志涛
Owner SUZHOU DONSUN CARBONWARE CO LTD
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