摘要
建立正交切削加工过程中的传热数学模型,基于Lagrange描述法和有限元法对正交切削的温度场进行数值计算,应用Deform有限元分析软件对不同加工材料、不同切削前角以及不同切削参数下的切削过程进行仿真,得出影响温度场的变化规律。研究结果表明,切削过程的热量主要由材料的塑性变形和切屑与刀具的摩擦产生的,在不改变材料属性的前提下,通过调整切削参数和刀具的形状来降低切削过程的温度,并给出具体刀具前角大小的温度影响分布曲线,为切削加工过程的优化提供参考依据。
Mathematical model of heat transfer is established in the process of orthogonal cutting. Temperature field is numerically calculated based on the way of Lagrange description and FEM（finite element method）. Orthogonal cutting is simulated by means of deform FEA（finite element analysis） software under different conditions of work piece material, cutting rakes and parameters of cutting in order to get the law of temperature field diffusion. Results of research show that heat is produced by plastic deformation of material and friction of chip and tool. On the premise of invariant attribution of material, temperature of cutting is decreased by changing parameters of cutting and shape of tool. Distribution curve of temperature vs. rake is made, which will provide basis for optimization of cutting process.
出处
《机械强度》
CAS
CSCD
北大核心
2009年第6期947-951,共5页
Journal of Mechanical Strength
基金
国防基础科研项目(D0620060433)~~
关键词
数值模拟
有限元法
正交切削
温度场
Numerical simulation
Finite element method
Orthogonal cutting
Temperature field
