钛合金超声振动辅助切削锯齿形切屑形成机理的数值分析  

Numerical Analysis of Serrated Chip Formation Mechanism of Titanium Alloy in Ultrasonic Vibration Assisted Machining

作　　者：陈德雄 陈金国 CHEN Dexiong;CHEN Jinguo(New Engineering Industry College,Putian University,Putian 351100,Fujian,China;Mechanical and Electrical Engineering College,Putian University,Putian 351100,Fujian,China)

机构地区：[1]莆田学院新工科产业学院,福建莆田351100 [2]莆田学院机电工程学院,福建莆田351100

出　　处：《机械科学与技术》2022年第2期270-277,共8页Mechanical Science and Technology for Aerospace Engineering

基　　金：莆田学院校级科研项目(2019125)。

摘　　要：超声振动辅助切削(UVAM)作为一种新颖而有效的加工技术,可有效提高工件的切削加工性能,被广泛应用于钛合金切削加工领域。建立热-力耦合模型仿真超声振动切削钛合金Ti6Al4V的瞬态切削过程,研究不同振幅对钛合金锯齿切屑的影响。数值研究结果表明:超声振动与切削速度的耦合作用导致材料出现大塑性变形,且高温是形成锯齿形切屑的主要原因。随着振动振幅的增大,切屑的弯曲半径、锯齿齿距和锯齿化系数均随之增大。本文结论为钛合金超声振动辅助切削的锯齿形切屑形成机理研究提供了参考。As a new and effective machining technology,ultrasonic vibration assisted machining(UVAM)can effectively improve the machining performance of workpieces,which has been widely used in the field of titanium alloy machining.A thermo-mechanical coupled model is established to simulate the transient cutting process of titanium alloy Ti6Al4V in ultrasonic vibration assisted machining.The influence of different vibration amplitudes on the serrated chips of titanium alloy is studied.The simulation results show that the coupling effect of ultrasonic vibration and cutting speed leads to large plastic deformation,and high temperature is the main reason for the formation of serrated chips.The bending radius,serration pitch and serration coefficient of chip all increase with the increase of amplitude.The conclusion can provide a guidance for the research of serrated chips formation mechanism of titanium alloy in ultrasonic vibration assisted machining.

关 键 词：钛合金 超声振动辅助切削 锯齿切屑 数值分析 

分 类 号：TH16[机械工程—机械制造及自动化]