硬质合金刀具螺旋槽缓进给磨削力研究

Research on Grinding Forces of Creep Feed Grinding Cemented Carbide Tool Helical Grooves

用离散化方法将砂轮看作是由一组不同直径的单位厚度薄片组成的,分析了硬质合金刀具螺旋槽缓进给成形磨削的磨削力;基于工件轴向磨削力和力矩建立了一个表征砂轮锐利程度的磨削力比数学模型。通过建立的测力系统测量了螺旋槽缓进给磨削过程中轴向磨削力和力矩,并对其信号进行了分析。在理论和实验的基础上获得了两种磨削参数下的磨削力比。研究结果表明,磨削力比可作为硬质合金刀具螺旋槽缓进给磨削过程的评价参数。

The grinding forces of creep feed grinding cemented carbide tool helical groove were an- alyzed by grinding wheel discretization method that the grinding wheel was regarded as composion of different elementary discs. Based on the grinding forces and torques of creep feed grinding cemented carbide tool helical groove, a mathematical model of grinding force ratio was established to describe the blunting of the diamond grains. The accurate signals of the grinding forces and torques were achieved by setting up a measurement system. The grinding force ratio was analyzed based on the mathematical model and the experimental data. The results show that the grinding force ratio can be used for grinding process evaluation.