基于DEFORM-3D的钛合金超声振动钻削加工特性分析

2018-08-17

作者：许金凯，任欢欢单位：长春理工大学

摘要：钛合金微小孔钻削时存在轴向力大、钻头易折断、切削热难以排出和表面质量差等加工难题，超声振动钻削将连续的切削过程变为脉冲式切削过程，能够有效减小轴向力、提高刀具使用寿命和提高孔壁加工质量。本文使用DEFORM-3D有限元仿真软件对Ti6Al4V振动钻削过程进行仿真，分析超声振动钻削与普通钻削的区别。在钻头直径D=1mm、转速n=1200r/min、进给量fz=0.03mm/r、振幅A=0.016mm参数下进行仿真，结果表明：振动钻削轴向力波形、扭矩波形、切屑形态等与普通钻削完全不同，轴向力及扭矩明显减小，具有独特的加工优势。

关键词：超声振动；钻削；DEFORM-3D

中图分类号：TG663；TH161文献标志码：A

Analysis of Ultrasonic Vibration Drilling Characteristics of Titanium Alloy

Based on DEFORM3D

Xu Jinkai，Ren Huanhuan

Abstract:When drilling tiny holes in titanium alloy，there are many problems，such as large axial force，easy breaking of drill bit，difficult to discharge cutting heat and poor surface quality，ultrasonic vibration drilling can change the continuous cutting process into pulse cutting process，which can effectively reduce axial force，improve tool service life and improve the machining quality of hole wall.In this paper，the DEFORM3D finite element simulation software is used to simulate the Ti6Al4V vibration drilling process，and the differences between ultrasonic vibration drilling and conventional drilling are analyzed.The results show that the axial force waveform，feed speed waveform and chip shape of vibration drilling are different from those of conventional drilling，and the axial force and torque are obviously reduced，which proves unique processing advantages.

Keywords:ultrasonic vibration；drilling；DEFORM3D