【摘要】 微透镜阵列作为一种非轴对称的复杂光学曲面,对轮廓精度及表面粗糙度的要求都非常高,在快刀伺服车削加工过程中,刀具补偿及其轨迹规划是非常重要的环节。首先介绍了刀具加工路径生成的基本流程,根据刀尖圆弧与工件曲面之间的几何关系,推导了刀位点坐标的计算公式;然后针对微透镜开口轮廓边缘区域,讨论了过渡区及其宽度和分布情况;最后提出了过渡区刀尖半径补偿优化算法,并基于MATLAB软件进行了加工仿真。结果表明提出的刀具路径优化方法能够有效提高微透镜轮廓边缘的加工精度。更多还原

【Abstract】 Microlens array is a kind of complex and non-axisymmetric optical surface,so the contour accuracy and the roughness is given a high demand. In the process of fast tool servo machining,the tool radius compensation and generation of tool path is important stage. Firstly,the basic procedure of generation of the tool path is introduced,according to the geometric relation between tool arc and surface of workpiece,the calculation formula of the cutter point is derived. Secondly,based on the edge of the contour,the width and distribution of the transitional zone are discussed. Finally,optimization algorithm of tool radius compensation in transitional zone is proposed. Make the machining simulation based on MATLAB software. The results show that the proposed optimization algorithm of tool radius compensation can improve the machining precision of the edge of the contour.更多还原