Composite binding agent grinding wheel for steel rail grinding and preparation method of composite binding agent grinding wheel

A composite binder and grinding wheel technology, which is applied in the direction of grinding/polishing equipment, rails, abrasives, etc., can solve the problem that superhard grinding wheels cannot meet the requirements of rail grinding, harsh grinding conditions, high pressure resistance, and grinding surface quality. Mileage limitations and other issues, to achieve the effect of reducing abnormal shedding, improving the surface quality of the workpiece, and improving the uniform temperature rise of the tissue

Active Publication Date: 2020-09-08
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

In view of the harsh conditions of rail grinding, high-frequency impact, constant pressure and dry grinding without cooling, the existing conventional superhard grinding wheels cannot meet the requirements of rail grinding, so it is urgent to develop special grinding wheels suitable for rail grinding
[0005] CN110116377A discloses a resin bond CBN emery wheel for rail grinding, which is composed of the following raw materials in weight percentage: resin po

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A composite bond grinding wheel for rail grinding, which is composed of the following raw materials in weight percentage: 5% diamond abrasive, 15% CBN abrasive, 45% modified resin powder, 25% copper-tin alloy powder, 4% carbon fiber, wollastonite 5%, wetting agent 1%.

[0035] The preparation method of the above-mentioned composite bond grinding wheel for rail grinding specifically includes the following steps:

[0036](1) Stir and mix copper-tin alloy powder, wollastonite, modified resin powder and carbon fiber, then put them into a planetary mixer for ball mixing for 4 hours, and pass through a 200-mesh standard sieve 5 times to obtain a uniformly mixed binder. Put the diamond abrasive and CBN abrasive through the 40-mesh sieve for 3 times, put them into the mortar, add the mixed wetting agent, grind for 30 minutes, pour the ground abrasive into the evenly mixed binder, and pass through the 40-mesh sieve 5 times to get a well-mixed grinding wheel molding material;

...

Embodiment 2

[0042] A composite bond grinding wheel for rail grinding, which is composed of the following raw materials in weight percentage: 9% diamond abrasive, 27% CBN abrasive, 28% modified resin powder, 18% copper-tin alloy powder, 5% carbon fiber, wollastonite 10%, wetting agent 3%.

[0043] The preparation method of the above-mentioned composite bond grinding wheel for rail grinding specifically includes the following steps:

[0044] (1) Stir and mix copper-tin alloy powder, wollastonite, modified resin powder and carbon fiber, then put them into a planetary mixer for ball mixing for 4 hours, and pass through a 200-mesh standard sieve for 5 times to obtain a uniformly mixed binder . Put the diamond abrasive and CBN abrasive through the 40-mesh sieve for 3 times, put them into the mortar, add the mixed wetting agent, grind for 30 minutes, pour the ground abrasive into the evenly mixed binder, and pass through the 40-mesh sieve 5 times to get a well-mixed grinding wheel molding mate...

Embodiment 3

[0051] A composite bond grinding wheel for rail grinding, which is composed of the following raw materials in weight percentage: 7% diamond abrasive, 21% CBN abrasive, 30% modified resin powder, 22% copper-tin alloy powder, 12% carbon fiber, wollastonite 6%, wetting agent 2%.

[0052] The preparation method of the above-mentioned composite bond grinding wheel for rail grinding specifically includes the following steps:

[0053] (1) Stir and mix copper-tin alloy powder, wollastonite, modified resin and carbon fiber, then put them into a planetary mixer for ball mixing for 4 hours, and pass through a 200-mesh standard sieve 5 times to obtain a uniformly mixed binder. Put the diamond abrasive and CBN abrasive through the 40-mesh sieve for 3 times, put them into the mortar, add the mixed wetting agent, grind for 30 minutes, pour the ground abrasive into the evenly mixed binder, and pass through the 40-mesh sieve 5 times to get a well-mixed grinding wheel molding material;

[005...

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Abstract

The invention relates to a composite binding agent grinding wheel for steel rail grinding. The composite binding agent grinding wheel comprises, by weight percent, 28%-45% of modified resin powder, 18%-25% of copper-tin alloy powder, 4%-12% of carbon fibers, 5%-10% of wollastonite, 1%-3% of a wetting agent and the balance grinding materials. The composite binding agent grinding wheel is good in self-sharpening performance, long in service life and high in safety coefficient, the problems happening to grinding under the extreme conditions of high frequency, high pressure and dry grinding duringsteel rail grinding can be solved, and the composite binding agent grinding wheel is used for grinding a steel rail and has the advantages that pressure capable of being borne during grinding is large, the grinding mileage is long, and steel rails are not burnt.

Description

technical field [0001] The invention belongs to the technical field of superabrasive abrasives, and in particular relates to a composite bond grinding wheel for rail grinding or constant pressure, high speed, and non-cooling working conditions and a preparation method thereof. Background technique [0002] During the operation of the railway, due to the inhomogeneity and complex variability of the road conditions, the cross-sectional and axial uneven wear of the rail is caused. With the development of domestic railways, the speed of trains is increasing and the traffic volume is becoming more and more intensive. The damage between the wheels and rails is becoming more and more serious. The annual cost of replacing and repairing damaged wheels and rails in our country continues to increase. . As the basic means of railway maintenance in my country, rail grinding technology plays a vital role in the safety and stability of railway operation. [0003] At present, ordinary abr...

Claims

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Application Information

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IPC IPC(8): B24D3/02B24D3/34B24D18/00E01B31/17
CPCB24D3/02B24D3/34B24D3/342B24D18/0009E01B31/17
Inventor 王礼华张高亮赵延军钱灌文左冬华李少杰曹剑锋
Owner ZHENGZHOU RES INST FOR ABRASIVES & GRINDING CO LTD
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