刀具前角对加工残余应力的影响分析_樊宁.pdfVIP

: 1001- 2265( 2009) 05- 0100- 03 刀具前角对加工残余应力的影响分析 1, 2 2 1 樊宁 , 陈明, 郭培全 ( 1. 济南大学机械工程学院, 济南 250022; 2. 上海交通大学机械与动力工程学院, 上海 200240) : 切削加工过程中在工件表面产生的残余应力的大小和分布对工件的 用性能有重要影响实践 表明工件表面残余应力与刀具前角密切相关文章建立了二维切削模型, 利用有限元法计算分析了残 余应力与刀具前角的关系结果表明, 在前角 一定变化范围内, 工件表面主要产生残余拉应力, 其值随 前角增加先增大后减小, 残余拉应力层的厚度与刀具前角关系不明显因此可以通过改变刀具前角来 控制加工过程中的残余应力 : 残余应力; 有限元; 前角 : G501 : A Effects of Cutting ToolRake Angle on M achining Residual Stress 1, 2 2 1 FAN N ing , CHEN M ing, GUO Pe-i quan ( 1. School ofMechanical Engineering, University of Jinan, Jinan 250022; 2. School ofMechanical Engineer- ing, ShanghaiJiaotong University, Shanghai200240, China) Abstract: he value and distribution of the residual stress generated on the workpiece surface have great effect on application performance for theworkpiece. he residual stress on workpiece surface has close relation w ith cutting tool rake angle. he two dmi ensional cutting model is established and the relation between residual stress and rake angle is analyzed by FEM in the present paper. It is proved that, in a certain range of rake an- gle, the tensile residual stress is generated on theworkpiece surface, which increasew ith rake angle increase at first and decrease subsequently. he thickness of residual stress layer has no obvious relation with rake angle. hus the residual stress could be controlled by changing the cutting tool rake angle. K ey words: residual stress; FEM; rake angle 0 , , , , , [ 1] 1 , ,