分析了四轴数控线切割机床所能加工的三维直纹面类型,以二维C型刀补为基础,根据各类型形状的特点采用了不同的刀补处理方法,分析了用二维刀补原则解决三维直纹面刀补的可行性,提出了一种不需将加工轨迹线形化的三维直纹面的直接刀补算法,指出了降低复杂直纹面刀补误差的措施。 The types of three-dimensional ruled surface that can be machined by the four-axis CNC wire-cutting machine are analyzed. Based on the two-dimensional C-shaped tooling, different tool compensation methods are adopted according to the characteristics of each type of shape. Principle to solve the feasibility of three-dimensional ruled facet compensation, a direct tool compensation algorithm for three-dimensional ruled surface that does not need to linearize the working path is proposed, and the measures to reduce the error of the complex ruled facet compensation are pointed out.