紫铜薄壁零件微铣加工变形分析及预测  

Analysis and prediction of micro milling deformation of copper thin-wall parts

作　　者：刘宇[1] 李鹏飞[1] 张义民[1] LIU Yu LI Peng - fei ZHANG Yi-min(School of Mechanical Engineering and Automation, Northeastern University , Shenyang 110819, China)

机构地区：[1]东北大学机械工程与自动化学院,沈阳110819

出　　处：《吉林大学学报（工学版）》2017年第3期844-849,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51105067);中央高校基本科研业务费专项资金项目(N120403011)

摘　　要：针对紫铜薄壁微铣削加工过程中的位移变形问题,建立了铣削力数学模型,采用四边形薄板单元有限元方法对薄壁铣削的位移变形进行分析预测。为了验证铣削力模型和薄壁变形预测的准确性,利用金刚石微铣刀对紫铜进行铣削试验。最后,通过光学显微镜和扫描电镜进行观测。结果表明:本文试验结果与仿真结果几乎吻合,证明本文建立的铣削力模型及采用的薄板变形分析方式可以有效地预测加工变形,且载荷位置与薄壁变形关系密切,切削变形随薄壁厚度的减小而快速增大。According to the deformation of copper thin-wall part in micro milling, a mathematical model of the milling force was established. The method of quadrilateral thin plate element FEM was used to predict the deformation caused by the cutting force. Experiments with diamond coated cutters were carried out to the validate the feasibility of the model and the precision of the deformation prediction. Optical Microscope （OM） and Scanning Electron Microscope （SEM） were used to observe the milled surface. Results show that the proposed mathematical model and analysis method can effectively predict the milling deformation of copper thin-wall parts. There is a close relationship between the load position and the thin-wall deformation. The cutting deformation increases quickly with the decrease in the thickness of the thin wall.

关 键 词：机械设计 切削变形 有限单元法 薄壁 微铣削 

分 类 号：TH12[机械工程—机械设计及理论]