摘要
针对薄壁件镜像铣加工过程中,铣削侧和支撑侧的相对位置和方向误差严重影响工件加工精度的问题,提出一种由误差预测模型和误差补偿策略组成的同步运动精度补偿算法。误差预测过程应用了一种基于形函数的插值算法,能够预测镜像铣工作空间中任意期望位置的相对位置和方向误差。误差补偿过程将铣削侧的刀位作为参考,对支撑侧的刀位进行补偿,然后分别生成数控(NC)代码。经过加工测量实验,补偿后的相对位置和方向精度分别提高了73%和60%,验证了所提算法的有效性。
Aiming at the problem that the machining accuracy of workpiece was affected by relative position and direction errors of the milling side and the supporting side seriously in the process of mirror milling of thin wall parts,a synchronization precision compensation algorithm was proposed composed of error prediction model and error compensation strategy.In the process of error prediction,an interpolation algorithm based on shape function was applied to predict the relative position and direction error of any desired position in the mirror milling workspace.In the error compensation process,the cutter location of the milling side was taken as a reference to compensate the cutter location of the supporting side,and then NC code was generated.After the processing measurement experiment,the precision of relative position and direction after compensation was improved by 73%and 60%respectively,and the validity of the proposed algorithm was verified.
作者
郭景浩
张立强
王勇
刘钢
GUO Jinghao;ZHANG Liqiang;WANG Yong;LIU Gang(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2020年第7期1756-1762,共7页
Computer Integrated Manufacturing Systems
基金
国家自然科学基金资助项目(51775328)。
关键词
镜像铣加工
同步精度
误差预测
误差补偿
mirror milling
synchronization accuracy
error prediction
error compensation
