刀屑摩擦对切削加工影响的有限元分析  

FEM Analysis for Effect of Friction between Chips and Tools on Cutting Process

作　　者：刘胜永[1] 万晓航[2] 董兆伟[2] 

机构地区：[1]河北师范大学机械系,石家庄050031 [2]河北工业职业技术学院,石家庄050091

出　　处：《有色金属》2007年第3期33-36,共4页Nonferrous Metals

基　　金：河北省科技厅科研资助项目(05212105D);河北省教育厅科研资助项目(2002240)

摘　　要：基于Lagrange质点坐标系描述方法,利用有限元分析软件,建立平面应变状态下的二维热-力耦合正交直角切削有限元分析模型,分析中采用修正库仑摩擦定律来模拟刀-屑之间的摩擦。结果表明,刀具前刀面与切屑的接触长度、切削温度、切削力和已加工表面的残余应力都随摩擦系数的增大而增加。摩擦系数对切削加工质量有着重要的影响。The reasonable two-dimension heat-mechanic coupling orthogonal cutting model is established by the FEM analysis software based on the Lagrange quality point coordinate system description method, the friction status between the chips and tools is simulated by use of the ameliorated Coulomb friction theory. The results show that the touching length of rake face and chip, the cutting temperature, the cutting forces and the residual stresses of machined surface are all increased with the increase of the friction coefficient. The friction coefficient plays an important role in the machining quality.

关 键 词：金属材料 金属切削 有限元 摩擦系数 残余应力 

分 类 号：TG501.1[金属学及工艺—金属切削加工及机床] TG142.31[一般工业技术—材料科学与工程]