Four-axis NC machine tools with rotation table are most suitable for the machining of rotationally complicated compound free form surfaces. To solve the interference problem in four-axis NC machining, the guard surface concept widely used in 3-axis machining was introduced into four-axis NC machining, corresponding guard surface calculating method was presented. Based on offset surface model, an algorithm of interference-free toolpath generation in four-axis machining was developed. Case study showed that the algorithm works well on PC platform. A brief review on problems to be further studied was also given.
WU Li-ping, SHI Fa-zhong, CHEN Wei-dong, ZHU Xin-xiong.Interference-Free Toolpath Generation of Rotationally Free Surfaces in Four-Axis NC Machining[J] JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2002,V28(3): 305-308