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进行钢轨高速打磨试验是研究钢轨高速打磨机理的重要手段。而钢轨高速打磨试验台与打磨列车现场打磨作业的主要差别是试验台的钢轨沿纵向方向具有有限曲率半径,而现场钢轨沿纵向的曲率半径接近无限大。这一现象使得试验台上测得的砂轮与钢轨间的切向磨削力与现场打磨过程中的实际磨削力有差别。该文根据砂轮磨削原理建立了一种可考虑钢轨沿纵向曲率半径的砂轮切向磨削力计算方法。通过与试验数据的对比,表明该方法计算得到的磨削切向力与试验数据有较好的吻合。该文利用所建立的方法给出了将试验台切向磨削力修正到现场切向磨削力的修正系数k,并分析了打磨过程中的法向加载力以及圆盘曲率半径对k值的影响。
High-speed rail grinding test is to study the mechanism of high-speed rail grinding an important means. The main difference between the on-site grinding operation of the rail high-speed grinding test bench and the grinding train is that the rail of the test bench has a limited radius of curvature in the longitudinal direction, while the curvature radius of the rail in the longitudinal direction near the rail is almost infinite. This phenomenon makes the difference between the tangential grinding force measured between the grinding wheel and the rail on the test bench and the actual grinding force in the process of on-site grinding. According to the principle of grinding wheel, a method to calculate the tangential grinding force of grinding wheel considering the longitudinal radius of curvature of the rail is established. By comparison with the experimental data, it shows that the calculated grinding tangential force is in good agreement with the experimental data. In this paper, the correction coefficient k for correcting the tangential grinding force of the test bench to the tangential grinding force on the test bench is given by using the established method. The normal loading force and the radius of curvature of the disc for k value Impact.