A kind of composition for manufacturing switch grinding wheel and its preparation method and use

A technology of composition and grinding wheel, which is applied in the direction of manufacturing tools, grinding/polishing equipment, abrasives, etc., can solve the problems of unstable grinding quality, low rotational strength, large grinding motor, etc., to ensure thermal performance and improve coating. , the effect of improving heat resistance

Active Publication Date: 2017-09-26
CHINA ACADEMY OF RAILWAY SCI CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The current turnout grinding wheels are mainly foreign products, while the domestic grinding wheels generally have the problems of few varieties, poor wear resistance, unstable grinding quality, low gyration strength, and high probability of damaging the grinding motor.

Method used

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  • A kind of composition for manufacturing switch grinding wheel and its preparation method and use
  • A kind of composition for manufacturing switch grinding wheel and its preparation method and use

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Experimental program
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Effect test

preparation example Construction

[0049] The preparation method comprises the following steps:

[0050] (1) First, in pot No. 1, zirconium corundum, epoxy resin powder and thermoplastic liquid phenolic resin are mixed evenly;

[0051] (2) Boron phenolic resin, hollow alumina powder, silicon carbide powder, calcined bauxite and potassium cryolite are mixed uniformly in No. 2 pot simultaneously;

[0052] (3) Put the mixed material obtained in step (1) and the mixed material obtained in step (2) into the No. 3 mixing pot and mix evenly, and keep it for 5-20 minutes;

[0053] (4) The mixture obtained in step (3) is hot-pressed and sintered at a high temperature;

Embodiment 1

[0055] The preparation technology of grinding wheel of the present invention is as follows:

[0056] (1) 55 parts of zirconium corundum, 3 parts of epoxy resin powder and 10 parts of thermoplastic liquid phenolic resin are mixed evenly;

[0057] (2) Mix 10 parts of boron phenolic resin, 5 parts of hollow alumina powder, 3 parts of silicon carbide powder (300 mesh fineness), 9 parts of calcined bauxite (800 mesh fineness) and 5 parts of potassium cryolite;

[0058] (3) Put the mixture obtained in step (1) and the mixture obtained in step (2) into the No. 3 mixing pot and mix evenly, and keep for 10 minutes;

[0059] (4) Hot press the mixture obtained in step (3), the pressure is 25Mpa, the pressure holding time is 40min, and the hot pressing temperature is 160°C, wherein, during the pressure holding process, the pressure is reduced to 0 within the first 10min Deflate, then quickly restore the pressure, repeat 3 times; high temperature sintering, the sintering temperature is 20...

Embodiment 2

[0061] The preparation technology of grinding wheel of the present invention is as follows:

[0062] (1) 50 parts of zirconium corundum, 5 parts of epoxy resin powder and 8 parts of thermoplastic liquid phenolic resin are mixed evenly;

[0063] (2) 13 parts of boron phenolic resin, 6 parts of hollow alumina powder, 5 parts of silicon carbide powder (fineness 500 mesh), 6 parts of calcined bauxite (fineness 1200 mesh) and 7 parts of potassium cryolite are mixed evenly;

[0064] (3) Enter the mixed material obtained in step (1) and the mixed material obtained in step (2) into the No. 3 mixing pot at the same time and mix evenly, and keep for 5 minutes;

[0065] (4) Hot press the mixture obtained in step (3), the pressure is 20Mpa, the pressure holding time is 30min, and the hot pressing temperature is 150°C, wherein, during the pressure holding process, the pressure is reduced to 0 within the first 10min Perform degassing, then quickly restore the pressure, repeat twice; high t...

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Abstract

The invention provides a composition for manufacturing turnout grinding wheels. The composition comprises the following components in parts by weight: 10-20 parts of boron phenolic resin, 50-65 parts of fused alumina zirconia, 3-7 parts of hollow alumina powder, 2-10 parts of thermoplastic fluid phenolic resin, 1-5 parts of carborundum powder, 3-9 parts of calcined bauxite, 1-5 parts of epoxy resin powder and 3-7 parts of elpasolite. The grinding wheel prepared from the composition has the characteristics of being high in strength, good in self-sharpening, simple in formula, good in process stability, easy and convenient to operate and low in cost. Meanwhile, the grinding wheel is high in polishing precision and quality and can precisely polish the spire part and other parts not easily polished of a turnout. The grinding wheel is not damaged during high-speed rotation.

Description

technical field [0001] The invention relates to a composition for manufacturing a grinding wheel, in particular to a composition for manufacturing a turnout grinding wheel used in rail traffic and a turnout grinding wheel prepared by using the composition. Background technique [0002] The turnout grinding technology is a turnout repair and maintenance technology emerging at home and abroad in recent years, which grinds the turnout through the high-speed rotation of the grinding wheel. Grinding the turnout before the opening of the rail transit line can eliminate the surface damage and deformation of the turnout caused by the construction. During the operation process, the shape of the turnout can be modified by grinding the turnout through a specific grinding control method, and the design shape of each part of the turnout can be restored. , improve the performance of the train when passing the turnout, prolong the service life of the turnout, and improve the safety perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D3/28B24D18/00
CPCB24D3/28B24D18/0009
Inventor 裴顶峰贺春江张国文党佳张恒
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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