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Composite bond grinding wheel for rail grinding and preparation method thereof

A composite binder and grinding wheel technology, applied in the direction of grinding/polishing equipment, rails, abrasives, etc., can solve the problem of poor grinding conditions, superhard grinding wheels that cannot meet the requirements of rail grinding, high pressure resistance, and grinding surface quality grinding Mileage limitations and other issues can be achieved to improve the grinding quality, reduce the friction coefficient, and the effect of no burn on the rail

Active Publication Date: 2021-08-24
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 powder is 20%-50%, CBN210 is 15%-25%, CBN850 is 10%-25%, electrolytic Copper powder is 3%-13%, green silicon carbide is 12%-20%, coupling agent is 1.4%-1.8%, polypropylene monofilament fiber is 0.2%-0.6%, although it has good grinding and sharpness, It can meet the requirements of railway track maintenance and grinding, but it still has limitations in high pressure resistance, grinding surface quality, and grinding mileage, and urgently needs improvement

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 bond grinding wheel for rail grinding, which is composed of the following raw materials in weight percentage: 28-45% of modified resin powder, 18-25% of copper-tin alloy powder, 4-12% of carbon fiber, wollastonite 5‑10%, 1‑3% wetting agent, and the balance is abrasive. The composite bond grinding wheel has good self-sharpening, long service life and high safety factor, and can solve the problems encountered in grinding rails under extreme conditions of high frequency, high pressure and dry grinding. High pressure, long grinding mileage, no burning of rails, etc.

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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Patent Type & Authority Patents(China)
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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