微细铣削应力场和温度场的有限元模拟  

Finite element simulation of stress field and temperature field in micro-milling

作　　者：孙雅洲[1,2] 孟庆鑫 韩丽丽[2] 刘海涛[2] 

机构地区：[1]哈尔滨工程大学机电工程学院,哈尔滨150001 [2]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《现代制造工程》2008年第12期66-69,共4页Modern Manufacturing Engineering

基　　金：黑龙江省博士后基金资助项目(LRB05-222);国防基础科研资助项目(2320060098)

摘　　要：采用有限元方法对微细铣削过程进行模拟,采用Johnson-Cook热力耦合模型作为工件材料模型,采用Johnson-Cook的剪切失效法则作为工件材料的失效准则,采用热力耦合平面应变杂交单元并使用自适应网格技术进行网格划分,刀具与工件间的摩擦采用滑动摩擦区和粘着摩擦区相结合的修正库仑定律。通过有限元分析,得到不同切削速度和刀具切削刃钝圆半径条件下形成切屑时的刀具旋转角度、不同每齿进给量条件下的应力场和温度场。分析结果为微细铣削机理的进一步研究奠定基础。Simulation of micro-milling process is conducted using finite element method. During modeling, the Johnson-Cook＇s coupled thermal-mechanical model was employed as workpiece material model, the Johnson-Cook＇s shear failure principle was adopted as work piece failure principle, and the coupled thermal-mechanical hexahedron strain hybrid modules and adaptive grid were used to remesh the workpiece＇s elements. The friction between the tool and workpiece obeys the amended coulomb＇s law that combines with the sliding friction and the adhesive friction. By means of FEA ,tool rotating angle when chip is formed under different rotating speed and cutting edge radius are obtained. Moreover, the stress field and temperature field under different feed per tooth are analyzed. The obtained results provide a basis for next investigation on the mechanism of micro-milling.

关 键 词：微细铣削 应力 温度 有限元 

分 类 号：TG501.2[金属学及工艺—金属切削加工及机床]