钛合金轴向超声振动微钻削的钻削力与毛刺研究

Study on Drilling Force and Burr of Axial Ultrasonic Vibration Micro-drilling of Titanium Alloy

针对TC4钛合金普通微钻削中存在的切削力大、断屑难和出口毛刺尺寸大等问题,对TC4钛合金板采用轴向超声振动辅助进行0.9 mm微孔钻削Deform-3D仿真和试验研究,根据轴向超声振动微钻削的切削特性,通过仿真对比分析轴向超声振动钻削和普通钻削的切削力,通过试验对比分析轴向超声振动钻削和普通钻削的切削力和出口毛刺,并分析钻削轴向力随进给量的变化规律。结果表明,超声振动钻削的轴向力相较于普通钻削可以降低30%左右,超声振动钻削和普通钻削均随着进给速度的增加而增加,超声振动钻削孔出口毛刺相较于普通钻削分布更加均匀。

In order to solve the problems of large cutting force,difficult chip breaking and large outlet burr size in TC4 titanium alloy ordinary micro-drilling,Deform-3D simulation and experimental research on 0.9 mm micro-hole drilling assisted by axial ultrasonic vibration of TC4 plate.According to the principle of axial ultrasonic vibration micro-drilling,the drilling axial force of axial ultrasonic vibration drilling and ordinary drilling is compared through emulation,the cutting force,outlet burr of axial ultrasonic vibration drilling and ordinary drilling are compared and analyzed through experiments,The variation law of drilling axial force with feed is analyzed.The research shows that compared with conventional drilling,the axial force of ultrasonic vibration drilling can be reduced by about 30%.The axial force of both ultrasonic vibration drilling and conventional drilling increases with the increase of feed velocity and the burr distribution at the outlet of ultrasonic vibration drilling is more uniform than that of ordinary drilling.