钛合金超声振动辅助钻削有限元仿真中不同刀具几何的评价

The Investigate of Different Tool Geometries in Ultrasonic-assisted Drilling Finite Element Simulation of Titanium Alloy

针对钛合金(Ti6A14V)难加工材料采用普通麻花钻传统钻削过程中切削力过大及切削温度过高的问题,对传统钻削和超声振动辅助钻削钛合金进行了有限元仿真试验,分析了进给量、主轴转速等钻削参数对三种不同的点角钻头在钻削过程中产生的切削力、等效应力及温度的影响。结果表明:相比于传统钻削,超声振动辅助钻削明显降低钻削力、最高切削温度,分别降低了13-22%和7-15%,为钻头刀具几何形状、钻削参数和切削性能的优化提供依据。

Aiming at the problems of excessive cutting force and high cutting temperature in the traditional drilling process of Ti6A14V difficult-to-machine materials using twist drills,conventional drilling(CD)and ultrasonic-assisted drilling(UAD)Ti6A14V.A finite element simulation experiment was performed,and the effects of drilling parameters such as feed rate and spindle speed on the thrust force,effective stresses,and temperatures of three different point-angle drills during drilling were analyzed.The results show that compared with CD,UAD significantly reduces the drilling force and the maximum cutting temperature by 13-22%and 7-15%,respectively,and provides a basis for the optimization of the bit geometry,drilling parameters and cutting performance.