数控系统等误差直线逼近节点算法分析与改进  

Analysis and Improvement of Equal-Error Approximation Algorithm for NC System

作　　者：文豪[1] 高健[1] 

机构地区：[1]广东工业大学机电工程学院,广东广州510006

出　　处：《机械设计与制造》2013年第9期217-219,223,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(51175093);广东省科技计划项目(2009B010900048;2010A080401003)

摘　　要：近些年来,复杂零件越来越多,其曲面轮廓往往需要采用数控加工,且加工精度要求也日益提高。非圆曲线是机械零件常见的平面轮廓曲线,但目前绝大多数数控系统只具备直线插补和圆弧插补功能,加工非圆曲线则需要用直线段或圆弧段来逼近非圆曲线。重点分析现有数控系统等误差直线逼近节点算法,指出该算法用于非圆曲线处理时的局限性。在此基础上,提出一种新的基于区域误差检验的等误差算法,并运用VC++编程软件,实现非圆曲线的等误差数控编程系统开发。最后,通过实例非圆曲线验证该算法的有效性。In recent years, there are more and more complex parts. And their surface often uses NC machining Moreover, the machining accuracy requirements also increase. Non-circular curve is a plane curve of mechanical parts of common. However, the vast majority of CNC system only has linear interpolation and circular interpolation, and the machining of non-circular curve is the need for line or arc segments to approach non-circular curve. It focuses on the analysis of the existing NC system equal error linear approximation algorithm, and discovers that the algorithm has limitation with non-circular curve. On this foundation, it puts forward new regional error checking algorithm, and using VC＋＋ programming software, realizing non-circular curve of equal error in NC programming systena Finally, by using example of non-circular curve, the algorithm is proved effective.

关 键 词：等误差 非圆曲线 节点 逼近 

分 类 号：TH16[机械工程—机械制造及自动化]