摘要
用数值仿真分析Al2O3/ZrO2(Y2O3)陶瓷刀具切削刃表面的温度场、应力场变化。采用瞬态和稳态有限元法确定模拟的初始变量,基于Deform2D和Johnson-Cook流变模型构建仿真切削模型,并对Al2O3/ZrO2(Y2O3)陶瓷刀具加工1045淬火钢进行仿真切削,实际切削和仿真切削的结果对比具有等同的一致性。结果表明,用Lagrange和任意拉格朗日欧拉方法获得稳态切削时刀刃接触表面的温度场和应力场,当改变切削速度和进给量参数时,将引起温度场和应力场的梯度变化,由此优选出最佳切削加工条件(切削速度vc、进给量f),为诊断陶瓷刀具的切削寿命和可靠性提供了理论数据。
The temperature field＇s and stress field＇s variations on the Al2O3/ZrO2 （Y2O3） ceramic cutting tool＇s edge are analyzed with numerical simulation method. Transient and steady state finite element analysis are respectively used to determine the initial variables. Finite element cutting model is created by the Deform2D and Johnson-Cook software. Cutting process of 1045 hardened steel using Al2O3/ZrO2 （Y2O3） ceramic cutting tool is simulated and result shows consistency. Comparing with the practical cutting the analysis indicates that temperature and stress field of cutting edge contact surface, which is obtained through the Lagrange and ALE approaches, will have gradient change while converting the feed or cutting speed, thus the best cutting conditions are selected. The parameters provide theoretical data to diagnosing ceramic tool＇s life and increasing reliability.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2013年第21期185-192,共8页
Journal of Mechanical Engineering
基金
沈阳市科技攻关计划资助项目(F10-053-2-00)
