关键词: 镜像铣加工, 同步精度, 误差预测, 误差补偿

Abstract: 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.

Key words: mirror milling, synchronization accuracy, error prediction, error compensation