改进线路中钢轨的修理,是铁路一个非常重要的问题。货运量的增长,很高的轴重,运行速度的提高,一方面要求线路特别是钢轨保持良好的状态;另一方面,这些因素是引起线路故障,特别是出现有波状磨耗、压堆踏面和其它钢轨表面缺陷的主要原因。线路中钢轨及时的定期检修和打磨,消除发现的缺陷,恢复轨头断面形状,对保证行车 It is a very important issue for railway to improve the repair of rails in the railway line. The increase of freight volume, high axle load and higher running speed mean that on the one hand, the lines, especially the rails, are kept in a good condition; on the other hand, these factors cause line faults, in particular, wavy wear, Other rail surface defects of the main reasons. Regular rail line maintenance and grinding in a timely manner to eliminate the defects found to restore rail cross-section shape, to ensure that traffic