车削过程的三维有限元数值模拟  

Three-dimensional finite element modeling of turning

作　　者：罗蓬[1] 胡侨丹[1] 夏巨谌[1] 胡国安[1] 

机构地区：[1]华中科技大学塑性成形模拟及模具技术国家重点实验室,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2006年第4期89-92,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：华中科技大学塑性成形模拟及模具技术国家重点实验室开放基金资助项目(04-3).

摘　　要：根据三维有限元法,提出车削过程弹塑性大变形的热-力耦合模型,并模拟了超细晶WC硬质合金车刀对AISI-1045碳钢的车削.车削工艺参数为:前角-5°、车削速度1×103mm/s、车削深度1.0mm、车削宽度3.0mm、进给量0.5mm/s.通过车削温度场与应力场的三维有限元模拟,分别得到刀-屑接触区最高温度、车削力与进给力相对车削位移的变化规律.由模拟结果发现,通过改善车刀结构,刀-屑接触区平均温度峰值由430℃下降为365℃;车削力平均值由1500N降至1400N.结果表明,三维有限元模拟可有效地仿真实际车削工艺环境,为优化车削工艺提供参考.On the basis of three-dimensional finite element modeling （3D-FEM） method, a thermo-elastic-plastic large deformation coupling model was presented to simulate numerically the turning of AISI-1045 carbon steel with ultra-fine grained WC-based hardening alloy tool. The turning parameters were used, including rake angle -5°,speed of turning 1 × 10^3 mm/s, depth of turning layer 1.0 mm, width of turning edge 3.0 mm, and feeding rate 0.5 mm/s. By means of 3D-FEM for distribution status of turning temperature and stress, the evolution relationships of maximum temperature in toolchip contacting zone, turning and feeding forces to turning displacement were provided. The simula- ting results show that the average temperature summit in tool-chip contacting zone is decreased from 430 ℃ to 365 ℃, when the structures of tools are improved, and the even turning force is reduced from 1 500 N to 1 400 N. The results demonstrate that the actual environment of turning can be simulated by 3D-FEM to optimize turning technology.

关 键 词：车削 三维有限元模拟 车削力 车削温度 

分 类 号：TG580.26[金属学及工艺—金属切削加工及机床]