基于冲击原理的磨削接触区及磨削力建模

磨削力是滑擦、耕犁及切削三个阶段共同作用的结果，仅对切削阶段进行研究通常造成切削力计算值与实测值的误差较大；因此本文考虑磨削接触区冲击效应对整个平面磨削加工过程的影响，将接触区划分为冲击区和切削区两部分.通过分析磨粒在冲击区内对工件产生的冲击载荷的变化情况，建立了单颗磨粒的冲击载荷模型及参与冲击的磨粒数目模型，并结合磨削力在切削区的变化情况，构建磨削力理论计算模型及总磨削力数学模型.最后通过实验研究验证了理论分析的合理性.

Grinding Contact Area and Grinding Force Modeling Based on Impact Principle

In a grinding process， the grinding force is generated from the joint actions of sliding friction， plough and cutting. The calculated grinding force which only takes account of the cutting process has big error， compared with the measured values. Based on the shock effect in the grinding contact area on the grinding process， the contact area was divided into impact area and cutting area. Changes in the impact load from the grits on a workpiece in the impact zone were analyzed to model the impact load generated from single grit， as well as modeling the number of grits involved in the impact. Moreover， the theoretical calculation models of grinding force and total grinding force were also developed. Experimental study verified the correctness of the theoretical analysis.