面向五轴联动高速加工的等距双NURBS刀具路径光顺方法  

Dual-NURBS Tool Path Fairing Method for Five-axis High-speed Machining

作　　者：杨堂勇 冯景春[1,2] 

机构地区：[1]广州数控设备有限公司,广州510530 [2]广东工业大学,广州510006

出　　处：《中国机械工程》2013年第11期1479-1483,共5页China Mechanical Engineering

基　　金：国家科技重大专项(2012ZX04001021)

摘　　要：针对采用等距NURBS描述的五轴联动刀路给出了一种光顺方法,对不满足拟合精度的断点采用对偶四元数Bezier矢量函数进行光顺处理,确保刀具路径满足拟合精度的同时实现G1或G1以上连续,以消除进给速度的方向突变,改善各轴伺服跟随性能,减轻机床冲击,从而适应五轴联动高速加工的需求。A Fairing method for dual-NURBS tool path was proposed, smoothing the break points where the accuracy was not satisfied with Bezier dual-quaternion vector function. With the proposed method, the accuracy and Gt continuity of the whole tool-path were attained. As a result, the needs for five-axis high- speed machining are met by eliminating the abrupt changes of the ve- locity direction, thus improving the servo dynamics and reducing the shock of the machine tool.

关 键 词：五轴联动 高速加工 路径光顺 非均匀有理B样条 

分 类 号：TG659[金属学及工艺—金属切削加工及机床] TP273[自动化与计算机技术—检测技术与自动化装置]