微铣刀磨损对工件温度场影响的数值模拟  

Numerical Simulation for Temperature Field of Workpiece Affected by Wear of Micro-milling Cutter

作　　者：张金峰[1] 巩亚东[1] 刘月明[1] 程军[1] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2011年第11期1635-1638,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50175064)

摘　　要：针对微铣削加工过程中的温度难以准确测量和精准控制的问题,主要从温度的角度出发建立了有限元数值分析模型.选取ALE自适应网格技术和热-机耦合方法,按照实际情况合理设置所需参数,并结合刀具磨损后其微切削刃半径变大这一重要条件,对工件温度变化的影响进行了数值模拟仿真.数值仿真结果表明:工件各温度区的温度变化趋势基本符合实际的微铣削加工过程温度场的变化趋势.这一数值分析结果将对微铣削实验加工有一定的指导意义.Temperature can not be accurately measured and precisely controlled in micro-milling process.To this problem,from the point of the temperature,a finite element analysis model was built using the technology of arbitrary Lagrangian Eulerian adaptive grid and the method of thermo-mechanical coupling.According to actual micro-milling situation,the required parameters were reasonably set.It was combined with the important conditions that the cutting edge radius would become larger with the wear of micro cutter.Finally,the effect of temperature changes on the workpiece was numerically analyzed.The simulation results showed that the temperature changing trend of the workpiece in each thermal zone meets the actual temperature of the micro milling process.The results may have certain significance in practical micro-milling process.

关 键 词：微铣削 数值模型 磨损 刀刃半径 温度区 

分 类 号：TG335.58[金属学及工艺—金属压力加工]