中文摘要：

通过建立的钛合金切削加工仿真数值模型,研究了刀具磨损对钛合金切削过程中切削力、切削温度及切屑形态的影响规律,并对这些影响的产生机理进行了讨论。结果表明：随着磨损程度的增大,切削力及切削温度会迅速增加;月牙洼磨损会引起切削力的剧烈震荡且振幅随磨损的增大而增大,后刀面磨损将增大切削力;锯齿形切屑的变形程度在加大,但是锯齿产生的频率在降低。

英文摘要：

The FEM model for cutting titanium alloy is established. The effect of the tool wear on the chip morphology, cutting temperature and cutting force are studied based on the present FEM model. The production mechanism of these effects is also discussed. The simulation results show that the cutting force and cutting temperature will rise with the increasing of tool wear. The oscillation of cutting force is caused mainly by tool crater wear and oscillation amplitude raise with the increasing of crater wear, meanwhile, the rise of cutting force is caused mainly by flank wear. Furthermore, the degree of chip deformation increases in the cutting process of Ti6A14V titanium alloy by using saw tooth, but the occurred frequency of saw tooth decreases.