数控单点金刚石切削非轴对称光学镜面

Machining Non Rotationally Symmetric Precision Optic Mirror Surface with Numerical Control Single Point Diamond Turning

目的切削加工非轴对称光学镜面．方法用压电陶瓷微位移伺服刀架作执行机构，以金刚石为切削刀具，在自行设计的微机控制加工系统上进行单点切削加工实验．工件材料为黄铜，所加工的曲面满足光学成像系统中的像差补偿反射镜面（非轴对称光学镜面）——Ｚｅｒｎｉｋｅ方程．结果在工件端面上实现了满足Ｚｅｒｎｉｋｅ面形方程的光学反射镜面加工，面形精确度为７１．６％．结论用数控单点金刚石切削法加工非轴对称光学镜面可行，所设计的控制加工软硬件系统具有极大的柔性，可靠性较高．

Aim\ To machine non rotationally symetric optic mirror surface Methods The servo control mechanism was made of piezoelectrical pottery And the cutting tool was made of diamond The single point diamond cutting experiments were finished on a self made computer control machining system The workpiece was made of copper The finished surface was a curved surface used in optic image system so as to compensate aberrations in it The surface was called non rotationally symetric opticmirror surface, and it′s equation was called Zernike equation Results Zernike optic mirror surface was finished on the end of a workpiece, and it′s precision was about 71 6 percent Conclusion The method by which non rotationally symetric optic mirror surface was made is practicable The self made computer control machining system is flexiable and the results are reliable