A kind of rail grinding grinding wheel and its preparation method

A technology for grinding wheels and rails, applied in the field of grinding wheels, can solve the problems of unreasonable ratio of resin powder, single abrasive, and inappropriate selection of filler components, etc., to achieve good self-sharpening, high hardness, high efficiency and good surface finish Effect

Active Publication Date: 2017-01-11
NINGBO DAHUA GRINDING WHEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The abrasives of the grinding wheel in the above two technical solutions are relatively simple, the choice of filler components is not very appropriate, and the ratio between abrasives, fillers and resin powder is also very unreasonable
Therefore, the grinding wheels obtained by the above two technical schemes cannot necessarily ensure that the grinding wheels can withstand heavy-duty strong vibration grinding.

Method used

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  • A kind of rail grinding grinding wheel and its preparation method
  • A kind of rail grinding grinding wheel and its preparation method
  • A kind of rail grinding grinding wheel and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] First, take the raw material by the composition and parts by weight of the rail grinding wheel of Example 1 in Table 1, the particle size of the abrasive in the raw material is controlled at 20#-60#, and the particle size of the phenolic resin powder is 200-320 mesh, The particle size of the filler is 200-320 mesh. Then add phenolic resin solution to the abrasive and stir for 8 minutes until the abrasive is fully soaked, and at the same time mix the filler and phenolic resin powder evenly to obtain a powder, and finally add the wetted abrasive to the mixed powder, and stir for 8 minutes to obtain a molding material.

[0043] Then, assemble the mold, put it into the iron die-casting matrix, weigh the appropriate weight of the molding material, put it into the molding mold and flatten it, at a temperature of 45°C and a pressure of 15N / mm 2 Under the condition of pressing for 15s, a grinding wheel blank is obtained. Then the pressed grinding wheel blank is dried in an ove...

Embodiment 2

[0046] First, weigh the raw materials according to the composition and parts by weight of the rail grinding wheel in Example 2 in Table 1. The particle sizes of the abrasives in the raw materials are respectively: zirconium corundum 20#-30#, brown corundum 30#-36#, carbonized Silicon 36#-46#, garnet 46#-60#, the particle size of phenolic resin powder is 200-260 mesh, the particle size of filler is respectively: cryolite 200-250 mesh, barite 250-280 mesh, vulcanization Iron 250-300 mesh, iron oxide 300-320 mesh, fluorite 250-320 mesh. Then add phenolic resin solution to the abrasive and stir for 8 minutes until the abrasive is fully soaked, and at the same time mix the filler and phenolic resin powder evenly to obtain a powder, and finally add the wetted abrasive to the mixed powder, and stir for 8 minutes to obtain a molding material.

[0047] Then, assemble the mold, put it into the iron die-casting matrix, weigh the appropriate weight of the molding material, put it into the...

Embodiment 3

[0050] First, weigh the raw materials according to the composition and parts by weight of the rail grinding wheel in Example 3 in Table 1. The particle sizes of the abrasives in the raw materials are respectively: zirconium corundum 20#-30#, brown corundum 30#-40#, carbonized Silicon 40#-50#, garnet 50#-60#, the particle size of phenolic resin powder is 250-300 mesh, the particle size of filler is: cryolite 250-300 mesh, barite 200-250 mesh, vulcanization Iron 250-300 mesh, iron oxide 250-300 mesh, fluorite 200-250 mesh. Then add phenolic resin solution to the abrasive and stir for 5 minutes until the abrasive is fully soaked, and at the same time mix the filler and phenolic resin powder evenly to obtain a powder, and finally add the wetted abrasive to the mixed powder, and stir for 5 minutes to obtain a molding material.

[0051] Then, assemble the mold, put the aluminum alloy material into the die-casting matrix, weigh the appropriate weight of the molding material, put it i...

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Abstract

The invention relates to a track grinding wheel and a preparation method thereof. The grinding wheel comprises a base body and a grinding body. An installation hole and a plurality of through holes around the installation hole are formed in the center of the base body. A first side wall, a second side wall and a third side wall are coaxially arranged on the front face of the base body and arranged around the installation hole. A groove is formed between the first side wall and the second side wall, and a groove is formed between the second side wall and the third side wall. The through holes are formed in the groove between the second side wall and the third side wall. One end of the grinding body is provided with protrusions matched with the grooves and the through holes in the base body. The grinding body and the base body are matched and connected through the protrusions and the grooves, and then are pressed and hardened to form the track grinding wheel. The grinding body comprises, by weight, 100 parts of grinding materials, 4 parts to 6 parts of phenolic resin solutions, 10 parts to 13 parts of phenolic resin powder and 15 parts to 30 parts of padding. The track grinding wheel is good in overall performance, capable of bearing strong vibration grinding of large loads, and high in safety performance.

Description

technical field [0001] The invention relates to a grinding wheel and a preparation method thereof, in particular to a rail grinding grinding wheel and a preparation method thereof, belonging to the technical field of grinding wheels. Background technique [0002] According to the needs of the country and the market, in order to meet travel needs and stimulate the transportation economy to serve people's travel, my country's railway department has carried out many large-scale speed-ups on my country's railways since 1997. The latest adjustment was July 1, 2014. After the adjustment, the national With the rapid development of my country's high-speed rail technology, the operation plan of trains will gradually change in the future, and the operating speed will increase steadily. However, the increase in the speed of railway trains puts forward higher technical requirements for rail materials, especially stricter requirements for the size and wear of rails. In order to meet the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D5/00B24D3/00B24D18/00
CPCB24D3/02B24D3/342B24D5/00B24D18/0009
Inventor 李保国张和平黄海燕刘钟
Owner NINGBO DAHUA GRINDING WHEEL
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