数控手机玻璃磨边机控制算法及误差分析与研究  

Research on Control Algorithms and Error Analysis about CNC Grinding Machine of Mobile Phone Cover Glass

作　　者：杜建铭[1] 龙泉[1] 麦焯伟 杜衡[1] 

机构地区：[1]深圳大学机电与控制工程学院,广东深圳518060

出　　处：《机床与液压》2015年第3期138-141,42,共5页Machine Tool & Hydraulics

基　　金：广东省自然科学基金项目(S2012010009058);深圳市科技计划项目(JCYJ20120613105226998)

摘　　要：为了去除手机玻璃边的瑕疵以提高其抗冲击力,设计一种数控磨边机。针对手机玻璃轮廓外形,采用了几何图形分析法,提出了基于极坐标系下的直线插补算法和圆弧插补算法。讨论了影响手机玻璃轮廓磨削加工精度的主要误差因素,推导出离散系统时间跟随误差公式和综合轮廓误差公式,采用了三次样条插值法,利用MATLAB软件对恒角速度磨削进行动力学仿真分析,并进一步提出恒角速度磨削改进策略。实践证明:采用上述控制算法的数控磨边机能有效地提高手机玻璃轮廓的磨边精度,满足工艺要求。In order to remove flaws from the edge of mobile phone cover glass for improving its impact resistance, a CNC edge grinding machine was designed. The Linear interpolation algorithm and the circular arc interpolation algorithm, based on the polar coor- dinates system, were proposed, in which the geometrical analysis method was used, by aiming at the outline of the mobile phone cover glass. Some key factors which had an important effect on the processing accuracy were discussed. The formula of tracking error for dis- crete time system and comprehensive contour error were deduced. The cubic spline interpolation method was carried out to perform dy- namic simulation of constant angular velocity grinding based on the platform of MATLAB software. Furthermore, the improved strategy was put forward about constant angular velocity grinding. The practice has proven that it can effectively improve the edge grinding accu- racy and meet the requirement of the grinding technique by using above control algorithm.

关 键 词：玻璃磨边机 极坐标 插补算法 跟随误差 轮廓误差 恒角速度磨削 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]