数控铣削加工中心加工精度分布规律  

Machining Accuracy Distribution Regularities of CNC Milling Machining Center

作　　者：范智广[1] 巩亚东[1] 王超[1] 吕威[1] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2013年第10期1465-1468,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51075064)

摘　　要：以正交试验设计理论为依据,结合数控加工技术的特点,给出了数控铣削加工中心加工精度分布规律的正交试验设计方案,进行变直径凸轮铣削加工试验.根据试验数据用Matlab对凸轮的线轮廓进行模拟,验证了数控铣削加工的线轮廓度误差符合正态分布规律;用极差分析法对加工误差较大的两处轮廓R_2和R_5进行线轮廓度误差分析,研究加工参数对其影响的显著性差异.在设计同一零件的不同弧段的轮廓度公差时所选定的值应该是不同的,To test the machining accuracy distribution of CNC milling machining center, an orthogonal experimental scheme was presented on the basis of the orthogonal test design theory and the characteristics of CNC machining technology. The scheme was used to machine variable diameter cams and then the line profiles of the cams were simulated using Matlab. The results showed that the line profile accuracy has a normal distribution. The relatively larger line profile errors, R2 and R5, were analyzed using the extreme difference analysis method in order to study the influence of machining parameters. The profile tolerance value should be different for every arc of the same part.

关 键 词：正交试验 数控铣削加工中心 线轮廓度 MATLAB 正态分布 

分 类 号：TG547[金属学及工艺—金属切削加工及机床]