在自由曲面的ＮＣ加工中，除了刀具轨迹要合理规划外，还有一个更重要的步骤是刀具轨迹的精度控制。本文介绍了自由曲面三轴联动ＮＣ加工时用切线法控制步长，用等残留高度法控制行距以确保曲面加工精度的方法 In the free-form NC machining, in addition to the tool path to be a reasonable plan, there is a more important step is the tool path accuracy control. This article describes the free-form surface triaxial NC machining tangent method to control step size, such as residual height control of the line spacing to ensure the accuracy of the surface processing method