【摘要】 利用超声椭圆振动切削(UEVC)对TC4钛合金切削力特性进行了研究。基于ABAQUS力-热耦合模型分析了超声椭圆振动切削钛合金的瞬态切削过程,模拟在不同切深和切削速度下的瞬态切削情况,提取和对比普通切削(CC)和超声椭圆振动切削的主切削力,进而进行数据处理,分析两者主切削力对比情况和平均主切削力之差的变化。研究分析表明:在椭圆振动切削下,切削力减小比率随着切深的增加而减小,随着切削速度的增大而增大。最后进行试验验证,实验结论与仿真结果一致。对超声振动切削难加工材料钛合金时切削用量的选择提供了参考。更多还原

【Abstract】 Here, the characteristics of cutting force were studied when the ultrasonic elliptical vibration cutting(UEVC) method was used to process TC4 titanium alloy. The transient cutting processes of titanium alloy with UEVC method were numerically simulated based on the force-thermal coupled model in the finite element(FE) software ABAQUS under different cutting depths and cutting speeds, and extract the main cutting forces. The main cutting forces of UEVC were compared with those of the conventional cutting(CC), and the data processing was done for them to analyze differences between the two main cutting forces and their variation. The study and analysis showed that Under UEVC, the reduction rate of cutting forces decreases with increase in cutting depth, and increases with increase in cutting speed. Finally, tests were conducted to verify the simulation results, and the test results agreed well with those of simulation. The results provided a reference for choosing cutting amount during titanium alloy processed with UEVC.更多还原