介观与宏观角度下的磨削力修正研究

摘要

从砂轮磨粒的几何形状和砂轮地貌入手，针对45#钢磨削力变化规律，从介观和宏观两个角度对磨削力进行了研究。通过介观角度下的磨削力仿真分析，研究了磨削深度、磨削速度与磨削力之间的关系；通过宏观角度下的磨削力仿真研究，得出了某一磨削参数下的磨削应力云图和磨削力变化图；对介观和宏观角度下的磨削力研究结果进行总结，得到了45#钢磨削力的修正公式。从仿真研究以及得到的磨削力修正公式可以看出，磨削力随磨削深度的增大而增大，磨削深度越大，磨削力变化趋势越明显；磨削力随磨削速度的增大而减小，当磨削速度超过一定值时，磨削力减小趋势减缓。%Starting with the geometry and grinding wheel topography of the grinding wheel,the grinding force was studied in the mesoscopic and macroscopic angles,according to the change law of grinding force of 45 # steel.The relationships between the grinding depth,grinding speed and grinding force were obtained from the simulation of the grinding force in the mesoscopic point of view;a grinding nephogram on the base of grinding parameters and grinding force variation diagram from the simulation of grinding force in the macr-oscopic angle were obtained;the research on grinding force of mesoscopic and macroscopic angles were summed to obtain correction formula of grinding force of 45 # steel.The result of the simulation research and the grinding force correction formula showed:Grinding force with the grinding depth increased,and the larger grinding depth was,the more obvious grinding force variation tendency was;grinding force with the grinding speed decreased, when the grinding speed exceeded a certain rate of grinding,decreasing trend of grinding force slowed down.