薄壁弱刚性件的工艺方法及变形控制研究  

Research on the Processing Method and Controlling of Distortion for the Thin-walled Weak Rigidity Parts

作　　者：李康[1] 李蓓智[1] 杨建国[1] 江小辉[1] 

机构地区：[1]东华大学机械工程学院,上海201620

出　　处：《组合机床与自动化加工技术》2013年第10期101-104,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金项目(50975046)资助

摘　　要：以航天中常用的薄壁框体类零件为例,通过有限元分析加工过程中残余应力对于薄壁件加工变形的影响,研究加工过程当中的切深安排和毛坯余量去除方式的选择和精加工策略进而保证加工质量和效率,即粗加工去余量过程中采用对称去余量的方式,可以减小初始应力导致的变形,同时采用变切深的切削方式,兼顾效率和质量,精加工选用从内向外的铣削路径的走刀路径。In this paper,taking the aerospace thin-walled parts as the target,the finite element method is used to analyze the deformation of thin-w alled parts w hich is influenced by residual stress.The arrangement of cutting depth and the material removal method of the w orkpiece is optimized to improve the machining quality and efficiency.The symmetrical material removal method is conducted to reduce deformation w hich is caused by initial residual stress.In addition,in rough machining the different cutting depth is utilized,w hile in finishing machining the tool path from inner to outer of the part.

关 键 词：残余应力 薄壁件 工艺优化 

分 类 号：TH162[机械工程—机械制造及自动化]