Preparation method of carbon fiber reinforced high-porosity ceramic bonding agent CBN grinding wheel

A ceramic bond, high porosity technology, used in manufacturing tools, metal processing equipment, grinding/polishing equipment, etc., can solve problems such as large surface area, high porosity, grinding wheel cracking, etc.

Inactive Publication Date: 2017-08-01
江苏华东砂轮有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small particle size and large surface area of ​​this type of precision grinding wheel, the sintered grinding wheel has high porosity, and the strength of the grinding wheel blank before sintering is very low. Gradually increasing the forming temperature will cause carbonization, generate a large amount of gas, accumulate a certain amount of stress, cause the grinding wheel to crack, and the yield is very low
On the other hand, the microstructure is loose, the impact strength is low, and it is easy to crack during use, which affects the performance of CBN grinding wheels

Method used

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  • Preparation method of carbon fiber reinforced high-porosity ceramic bonding agent CBN grinding wheel
  • Preparation method of carbon fiber reinforced high-porosity ceramic bonding agent CBN grinding wheel
  • Preparation method of carbon fiber reinforced high-porosity ceramic bonding agent CBN grinding wheel

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Embodiment Construction

[0016] The specific steps of the carbon fiber reinforced high porosity vitrified bond CBN grinding wheel preparation method are:

[0017] (1) Weigh the CBN abrasive, boron glass powder, GG17 glass powder, T400 chopped carbon fiber and quartz powder in a weight ratio of 40:30:10:15:5, and then mix the raw materials evenly under ball milling conditions, and the ball stone It is a plastic ball, the diameter of the ball milling altar is 500 mm, the rotating speed is 50 rpm, and the ball milling time is 1 hour;

[0018] (2) Get 70% of the dry powder material obtained in step (1) and 30% of industrial grade paraffin by weight percentage. Heat the paraffin wax to 80°C in a water bath, then pour it into the weighed dry powder, and use a vertical mixer to mix it evenly at 80°C at a speed of 3000 rpm for 1 hour to obtain a CBN grinding wheel molding slurry.

[0019] (3) Clean the surface of the iron injection mold prepared according to the specifications of the grinding wheel, heat it ...

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Abstract

The invention discloses a preparation method of a carbon fiber reinforced high-porosity ceramic bonding agent CBN grinding wheel. The method comprises the steps that CBN grinding materials, borosilicate glass powder, GG17 glass powder, T400 short carbon fiber and quartz powder are weighed according to weights, the materials are subjected to ball milling and mixed to be uniform, the mixed powder and molten paraffin are stirred and mixed according to the proportion, and CBN grinding wheel molding slurry is prepared; the slurry is injected into a molding die at 80 DEG C, demolding is carried out after cooling, and a CBN grinding wheel blank is obtained; and the grinding wheel blank is subjected to buried sanding through white corundum and then is dewaxed and sintered through a certain heat treatment process under nitrogen atmosphere, the sintered grinding wheel blank is subjected to outer circle, inner circle and plane machining, and the carbon fiber reinforced high-porosity ceramic bonding agent CBN grinding wheel with the porosity higher than 40% and carbon fibers evenly distributed in a grinding wheel base body is prepared.

Description

technical field [0001] The invention relates to a method for preparing a vitrified bond grinding wheel, and further refers to a preparation technology for a carbon fiber-reinforced high-porosity vitrified bond CBN grinding wheel. The high-porosity CBN grinding wheel prepared by this method has higher strength, and the grinding wheel is used in ordinary The ferrous metal workpiece is finely ground and polished on the grinding machine to obtain a high-gloss machined surface. Background technique [0002] Vitrified bond cubic boron nitride (CBN) grinding wheel has the advantages of high grinding efficiency, small grinding force, good dimensional retention, high grinding precision, easy dressing, etc. It is widely used in profile grinding and precision grinding of ferrous metals . With the rapid development of my country's precision machinery manufacturing industry, the requirements for the surface quality and grinding efficiency of metal parts are getting higher and higher. Hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D3/14B24D18/00
CPCB24D3/14B24D18/00
Inventor 刘小磐陈瑞和
Owner 江苏华东砂轮有限公司
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