大口径非球面镜交叉磨削中波纹度产生机理的研究

基于大口径非球面镜交叉磨削加工方式,分析主轴偏心振动幅值和磨削工艺参数对其表面波纹度的影响,建立磨削表面波纹度形成机理三维模型。通过仿真试验分析磨削表面三维波纹度与加工工艺参数的关系,提出特定主轴最佳磨削工艺参数匹配方案。磨削试验结果表明:建立的三维表面波纹度模型与磨削工艺参数关系合理,最优的磨削工艺参数匹配方案为砂轮转速1600~1800 r/min,X轴进给速度1~3 mm/r,工件旋转速度20 r/min。

Study on mechanism of waviness in cross grinding large diameter aspherical mirror

The influence of the eccentric vibration amplitude of spindle and the grinding parameters on the surface waviness is investigated according to the cross-grinding method for large-diameter aspheric mirrors, and a three dimensional (3D) model of the mechanism of grinding surface waviness is established. The relationship between grinding surface 3D waviness and machining process parameters is analyzed by simulation experiments, and the optimal range of grinding process parameters is proposed for the specific spindle. The grinding experiment results show that the relationship between the established 3D waviness model and grinding process parameters is reasonable. The wheel speed of 1600 to 1 800 r/min , the X axis feed velocity of 1 to 3 mm/r and the workpiece speed of 20 r/min are optimal technological parameters.