关键词: 五轴加工|对偶四元数|等距双样条|刀具路径

Abstract: Aiming at the problem that the motion stability of machine tool was affected by first-order linear discontinuous path of discrete tool, the fairing method was used for linear tool path under Work Coordinate System(WCS) to obtain the dual-NURBS tool path with equal distance which satisfied the given fitting accuracy and G1 continuation. The dualquaternion was used to describe five-axis tool position, and the linear tool path in WCS was fitted with dual-quaternion B-spline vector function to obtain the tool path B-spline trajectory of five-axis linkage. The dual-NURBS tool path with equal distance for describing the locus of tool tip point and tool axis point was obtained by interpolation. The proposed method was used to fair the linear tool path in WCS, and the result showed that it could not only improve the motion stability of tool, but also could obtain the satisfying process accuracy.

Key words: five-axis machining|dual quaternion|double splines with equal distance|tool path