Abstract:

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 G1 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 velocity direction, thus improving the servo dynamics and reducing the shock of the machine tool.

Key words: five-axis linkage, high-speed machining, tool-path fairing, NURBS

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。

关键词: 五轴联动, 高速加工, 路径光顺, 非均匀有理B样条