Abstract:

Aiming at the demands of complex surface high speed and high precision CNC machining, the contour errors and the orientation errors in 5-axis system were analyzed and the real-time math models of them were set up, and arrived at the system tracking error real-time math model. A 5-axis cross-coupled controller based on the double NURBS hybrid parametric interpolation algorithm was proposed. Simulation results show the machining precision of parts in 5-axis systems is improved effectively.

Key words: cross-coupled control;five-axis cooperating;following , error;tool , motion error

摘要：

针对零件复杂曲面高速高精度数控加工的需求，分析五轴联动数控加工系统刀具运动轨迹中的轮廓误差和方向误差，建立了该轮廓误差和方向误差的实时计算模型，从而得出系统跟踪误差计算模型；在此基础上设计出一种基于双NURBS参数混合插补算法的五轴联动数控系统交叉耦合控制器,并对其进行仿真,仿真结果表明,使用该交叉耦合控制器能有效提高五轴联动数控系统的零件加工精度。

关键词: 交叉耦合控制, 五轴联动, 跟踪误差, 刀具运动误差