Forming process of special passive grinding wheel for high-speed grinding vehicle

Abstract

The invention discloses a forming process of a special passive grinding wheel for a high-speed grinding vehicle. The forming process comprises the following steps of preparing materials comprising components of, in parts by weight, 55-70 parts of combination grain size fused alumina zirconia, 5-10 parts of combination grain size brown fused alumina, 9-12 parts of mixed resin, 0.5-1 parts of silanecoupling agent, 1.5-8 parts of ferric sulfide, 1.5-5 parts of potassium cryolite, 1-3 parts of feldspar powder, 1-3 parts of barite, 1.5-3 parts of semi-hydrated gypsum powder and 2-4 parts of hollowglass beads; mixing materials; carrying out cold press molding; and hardening. Compared with the prior art, the preparation method has the positive effects that the materials are selected according to a specific formula design, cold press molding is carried out, a passive grinding wheel prepared by arranging a solidifying heating curve suitable for the cold press molding process has the advantages that the strength is high, the self-sharpening performance is high, the grinding efficiency is high, the grinding wheel is not blocked in the grinding process, the heat dissipation is rapid, a steelrail is not burnt, and the quality of the surface of the ground steel rail is good.

Description

technical field [0001] The invention relates to a special passive grinding wheel forming process for a high-speed grinding vehicle. Background technique [0002] Under the load of a locomotive, the rails carry tremendous pressure and impact from the wheels. Under complex working conditions, various damages will inevitably occur, including defects in the smelting process, and damages in the process of transportation, construction, and use. Common rail damage is divided into two categories, one is rail wear including: vertical wear, side wear, wavy wear; the other is contact fatigue damage including: rail head cracks, hidden damage, peeling, fat edge, rail abrasion, etc. Rail wear leads to increased noise and maintenance costs, while contact fatigue damage shortens rail life and presents safety hazards. [0003] At present, the main rail repair method is low-speed active grinding. After the rail is damaged, the rail grinding vehicle will grind and repair the rail at a speed ...

AI Technical Summary

Problems solved by technology

The existing grinding wheel manufacturing process is a hot pressing molding process. The disadvantage of the process is that the production efficiency is low. After the hot pressing molding resin is fully flowed and solidified, the outer surface of the grinding wheel is covered with a layer of cured resin, and the abrasive grains cannot be fully exposed. The porosity between the grains is low and easy to be blocked, and the self-sharpening is poor. When grinding the rail, it is slippery, the temperature of the grinding surface is high, and the grinding efficiency is low. After grinding, the surface quality of the rail is poor, and rail burning often occurs

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