针对数控加工中生成环形刀具轨迹的算法问题,提出了分层环切算法,该算法由层次的划分和刀具轨迹生成两部分组成。分层环切算法由于避免了去除自交环裁减运算,因而减少了计算量,提高了算法的效率,适用于大尺寸的含岛屿或凹坑的型腔的刀具轨迹规划。 Aiming at the algorithm of generating circular tool path in NC machining, a hierarchical loop cutting algorithm is proposed. The algorithm consists of the layer division and tool path generation. Hierarchical ring-cutting algorithm avoids eliminating the self-intersecting ring, thus reducing the computational complexity and improving the efficiency of the algorithm. It is suitable for large-size tool path planning of islands or pockets with cavities.