自由曲面慢刀伺服车削加工技术  

Technology of Freeform Surface by Using Slow Tool Servo

作　　者：于保军[1] 董青青 谷岩[1] 赵春满 YU Bao-jun;DONG Qing-qing;GU Yan;ZHAO Chun-man(School of Mechanical Engineering,Changchun University of Technology,Jilin Changchun 130012,China)

机构地区：[1]长春工业大学机电工程学院,吉林长春130012

出　　处：《机械设计与制造》2021年第11期119-121,共3页Machinery Design & Manufacture

基　　金：国家科技部国家重点研发计划项目—信息使能的复杂光机功能部件制造关键技术研究(2016YFE0105100);吉林省省级重点实验室平台建设项目(20140622008JC)。

摘　　要：目前,自由曲面的高速、高精度加工存在很多困难。因此,提出了适用于自由曲面加工的慢刀伺服车削的刀具路径规划方法。该方法考虑节点向量与控制点,采用NURBS曲线拟合刀具路径。NURBS曲线拟合的过程中先预处理离散点,然后将其参数化。再确定节点向量后反求控制顶点。通过调整控制顶点,可以快速的调整曲线的形状,使拟合的过程更加准确。最后对正弦网格表面与微透镜阵列表面进行了加工实验,验证了该加工方法的有效性。At present,there are many difficulties in high-speed,high-precision machining of free-form surfaces.This paper pres⁃ents a tool path planning method for free-form surface slow tool servo(STS)diamond turning.Node vectors and control vertices are considered in this method,and the NURBS curve fitting method is used to fit the tool path.The process of NURBS curve fit⁃ting is to pre-process discrete points and then parameterize them.After determining the node vector,the control vertices is obtained inversely.By adjusting the control vertices,the shape of the curve can be quickly adjusted to make the fitting process more accu⁃rate.Finally,the sinusoidal mesh surface and the microlens array(MLA)surface are machined to verify the effectiveness of the machining method.

关 键 词：超精密加工 慢刀伺服 自由曲面 刀具路径 非均匀有理B样条 正弦网格 微透镜阵列 

分 类 号：TH16[机械工程—机械制造及自动化] TH161