铝合金三维铣削加工的有限元模拟与分析  

Finite element simulation and analysis of aluminum alloy three-dimensional milling

作　　者：董辉跃[1] 柯映林[1] 成群林[1] 

机构地区：[1]浙江大学机械与能源工程学院,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2006年第5期759-762,共4页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(50175102);中国博士后科学基金资助项目(2005037259)

摘　　要：针对铝合金材料7050T7451的铣削加工,将刀具视为刚体,前刀面和切屑间的摩擦定义为材料流应力的函数,采用商业有限元软件DEFORM3D,建立了能够反应实际铣削状态的三维铣削模型.利用该模型模拟了切屑的形成过程,获得了与实际切屑相似的屑形.通过分析铣削过程中的三维铣削力的变化,揭示了刀-屑的接触长度.对应力、应变和切削温度分布的分析表明,应力主要集中在第一剪切区,而应变和温度的最大值在刀-屑接触面上.The present work aims at simulating three-dimensional 7050T7451. Considering the tool as a rigid body and the friction at milling operation of aluminum alloy the chip-tool contact as a function of flow stress data, commercially available software DEFORM3D was used to develop a three-dimensional finite element model （FEM） for simulating chip forming process, with chip morphology agreeing well with chip got from experiment. Analysis of the changing process of milling force resulting from the FEM indicates the contact length between tool and chip. Distribution of stress, strain and milling temperature showed that stress is localized in the primary shear zone, while the maximum strain and temperature rise occurs along the tool-chip interface.

关 键 词：铣削 铝合金 有限元模型 三维模拟 

分 类 号：TG54[金属学及工艺—金属切削加工及机床] TG659