Study on brazed diamond grinding wheel for rail grinding

Abstract

In order to solve the problems of low grinding efficiency, easy to burn rail and large dust pollution, when grinding rail with traditional resin wheel, the feasibility of taking advantage of brazed diamond technique for preparing a new rail grinding wheel was studied. The brazed diamond grinding wheel with slotted structure was prepared by using of the diamond orderly arrangement process. The comparative grinding tests were carried out on U71Mn rail steel. The results show that compares with resin corundum grinding wheel, the new brazed diamond grinding wheel can improve the grinding efficiency by about 50%, effectively reduce the grinding temperature and avoid rail burn. The new grinding wheel has remarkable chip removal effect in the process of rail grinding, and there is almost no chip adhesion. However, the slots on the grinding wheel increases the grinding vibration, aggravates the breakage of diamond abrasive particles and increases the surface roughness of rail. The grinding debris of the new grinding wheel is mostly band-shape with large size but no molten balls.

Keywords

• rail grinding
• brazing diamond
• structural optimization
• grinding efficiency