Geometric Accuracy Innovative Design Method for Machine Tool

This paper presents a geometric accuracy innovation design method for the moving component layer of machine tools, which can characterize the intrinsic connection between machine tool geometric errors and machine tool spatial errors, so as to effectively ensure the spatial accuracy of machine tools after accuracy design. Firstly, the spatial error model of the machine tool is constructed using the screw theory. Secondly, a geometric accuracy innovation design method is proposed with the sensitivity as the design weight and the spatial accuracy as the constraint. Then, an intelligent population optimisation algorithm combined with Monte Carlo is used to optimally solve the design results of the optimal geometric accuracy. Finally, the validity and universality of the proposed geometric accuracy innovation design method is verified through simulation, which can ensure that more than 95.25% of the simulation position points in the workspace of the vertical machining center can meet the spatial accuracy of less than 15μm.