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A high-shape-retaining composite bond superhard grinding wheel and its preparation method

A compound binder and high shape retention technology, which is applied in the direction of manufacturing tools, metal processing equipment, grinding/polishing equipment, etc., can solve the problems of poor self-sharpening of grinding wheels, poor sharp corner retention, frequent dressing, etc., to reduce agglomeration, Effects of improving impact strength and abrasion resistance, improving fluidity and formability

Active Publication Date: 2021-09-03
ZHENGZHOU RES INST FOR ABRASIVES & GRINDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal-bonded grinding wheels have the advantages of high strength, good geometric shape retention of the working surface, long life, and impact resistance, but the grinding wheel has poor self-sharpening and low efficiency
Traditional resin-bonded grinding wheels have high grinding efficiency and good self-sharpening, but resin-bonded grinding wheels have disadvantages such as low heat resistance, poor sharp corner retention, and frequent dressing, which can no longer meet the needs of the industry for efficient processing

Method used

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  • A high-shape-retaining composite bond superhard grinding wheel and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A superhard grinding wheel with high shape retention compound binder, which is made of the following raw materials in weight percentage: polyimide resin 23%, copper powder (particle size 10μm) 31%, silicon dioxide (particle size W28) 15%, tin powder (particle size 10μm) 8%, carbon fiber 3% with an aspect ratio of 15:1, abrasive diamond 20% (particle size D64); among them, polyimide resin and carbon fiber were pre-treated as follows: In the formula, pour polyimide resin and carbon fiber with an aspect ratio of 15:1 into the steel mixing tank, add cemented carbide balls (ball diameter 5mm) twice the volume of raw material powder at a volume ratio of 1:2, and put Put the mixing tank into the planetary mixer and mix for 6 hours; put the evenly mixed material resin and carbon fiber into the abrasive tool, and press it into a cylindrical material with a diameter of 100mm and a height of 50mm on a hot press at 150°C, and then put the cylindrical material The material is turned...

Embodiment 2

[0035] A superhard grinding wheel with high shape retention composite bond, which is made of the following raw materials in weight percentage: 30% polyimide resin, 23% copper-tin pre-alloyed powder (wherein the mass ratio of copper to tin is 2:1 , particle size 15μm), silicon dioxide (particle size W28) 15%, carbon fiber with aspect ratio 15:1 7%, abrasive diamond 25% (particle size D64); among them, polyimide resin and carbon fiber are pretreated as follows Obtain: Pour polyimide resin and carbon fiber with aspect ratio 15:1 into the steel mixing tank according to the proportion in the formula, and add cemented carbide balls (ball diameter 5mm ), put the mixing tank into the planetary mixer and mix for 6 hours; put the evenly mixed material resin and carbon fiber into the abrasive tool, and press it into a cylindrical material with a diameter of 100mm and a height of 50mm on a hot press at 150°C. Then the cylindrical material is turned into powder on a common car with a singl...

Embodiment 3

[0043]A superhard grinding wheel with high shape retention composite bond, the superhard grinding wheel is made of the following raw materials in weight percentage: polyimide resin 28%, copper-tin pre-alloyed powder 20% (wherein the mass ratio of copper to tin is 4:1 , particle size 8μm), silica (particle size W28) 20%, carbon fiber 5% with an aspect ratio of 15:1, abrasive CBN 27% (particle size D64); among them, polyimide resin and carbon fiber are pre-treated as follows Obtain: Pour polyimide resin and carbon fiber with aspect ratio 15:1 into the steel mixing tank according to the proportion in the formula, and add cemented carbide balls (ball diameter 5mm ), put the mixing tank into the planetary mixer and mix for 6 hours; put the evenly mixed material resin and carbon fiber into the abrasive tool, and press it into a cylindrical material with a diameter of 100mm and a height of 50mm on a hot press at 150°C. Then the cylindrical material is turned into powder on a common c...

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Abstract

The invention relates to a composite bond superhard grinding wheel with high shape retention properties. The superhard grinding wheel is made of the following raw materials in weight percentages: polyimide resin 15-45%, copper powder 15-50%, silica 8 -20%, tin powder 5-15%, carbon fiber 2-10%, the balance is abrasive. The superhard grinding wheel of the present invention not only has the sharpness of a resin bond grinding wheel, but also has the shape retention and heat resistance of a metal grinding wheel, that is, it has better sharpness and sharp corner retention. The grinder load is 1-2%. It can meet the needs of efficient processing in the industry.

Description

technical field [0001] The invention belongs to the technical field of superhard grinding wheel abrasive grinding, and in particular relates to a superhard grinding wheel with high shape-retaining composite binder and a preparation method thereof. Background technique [0002] The binder used to consolidate diamond or CBN abrasive grains in the grinding wheel has three materials: resin, metal and ceramics. Metal-bonded grinding wheels have the advantages of high strength, good geometric shape retention of the working surface, long life, and impact resistance, but the grinding wheel has poor self-sharpening and low efficiency. Traditional resin-bonded grinding wheels have high grinding efficiency and good self-sharpening, but resin-bonded grinding wheels have disadvantages such as low heat resistance, poor sharp corner retention, and frequent dressing, which can no longer meet the needs of the industry for efficient processing. [0003] In order to overcome the shortcomings ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D3/02B24D3/34B24D18/00
CPCB24D3/02B24D3/34B24D3/342B24D18/0009
Inventor 左冬华张高亮赵延军王礼华钱灌文
Owner ZHENGZHOU RES INST FOR ABRASIVES & GRINDING CO LTD
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