轴向进给周边轮廓磨削切入阶段磨削力模型

Grinding force models of profile grinding with axial feed in cut-in phase

在轴向进给周边轮廓磨削的切入阶段,磨粒与工件的接触面积在不断变化.根据单颗磨粒与工件接触横断面形状的不同,把切入阶段分为前阶段和后阶段,建立了基于磨粒与工件接触面积的单颗磨粒在两个阶段的磨削力模型.在切入阶段,切向力和法向力随着时间的增加而增加,而轴向力则先上升再下降.这一变化规律与实验结果相近,从而验证了切入阶段的磨削力模型.

In the cut-in phase of profile grinding with axial feed,the contact area between the abrasive grain and the workpiece changes ceaselessly with time.According to the different shapes of different cross-sections in contact zone,the cut-in phase was devided into pre-stage and later stage and the grinding force models for single grain in two stages was built based on the contact area between the abrasive grain and the workpiece.In cut-in phase,both the tangential force and the normal force would increase with time,but the axial force increase first and then decrease with time.The variation process was similar to the experimental results,which validates the grinding force models in cut-in phase.