单磨头打磨钢轨廓形的仿真分析

Simulation Analysis of the Rail Profile after Grinding by Single Grinding Wheel

钢轨打磨是铁路线路重要的养护维修技术,唯有高精度的打磨才能最大限度的延长钢轨寿命,深入了解钢轨廓形打磨的规律对提高打磨精度有重要意义。以PGM-96C型打磨车为例,基于迹线法求解砂轮与钢轨接触位置,提出单磨头打磨量的计算方法,并通过现场试验进行验证,最后基于该计算方法对不同打磨角度下的单磨头打磨钢轨廓形进行仿真分析,结果表明,在17.6 k W的打磨功率下,砂轮摆角为0°时,钢轨打磨深度为0.08 mm,打磨宽度为12.17 mm,随着砂轮摆角增大,钢轨打磨深度增大,而打磨宽度减小,砂轮摆角增大到20°以上时,打磨深度维持在0.22 mm左右,打磨宽度维持在4.70 mm左右。

Rail grinding is an important means for railway maintenance, and only grinding with high precision can further prolong the service life of rail. Hence, it is significant to research the rail profile after grinding for improving the grinding accuracy. This paper, taking the PGM-96C grinding car as an example, proposed a grind ing quantity calculation method of single grinding wheel, then verified the calculation method by field test, and finally made the simulation analysis of rail profiles in different grinding angles. Results show： when the grinding power is 17.6 kW and the angle of grinding wheel 0~, the grinding depth is 0.08 mm and the grinding width is 12.17 mm;with the increase of the angle, the grinding depth is also increasing, but the grinding width is decreasing; when the angle of grinding wheel is more than 20°, the grinding depth remains around 0.22 mm with the grinding width around 4.70 mm.