Sensitivity Analysis and Tolerance Design for Precision Machine Tool

Abstract

The least squares method is used to evaluate the part machining precision from the perspective of tolerance design, by using the machine tool space motion error modeling, the Monte Carlo method and the Matlab software, and the precision requirements and the machine movement axis are obtained by the orthogonal test method. Multiple sets of corresponding data of the error tolerance band, through multiple linear regression, sensitivity analysis. At the same time based on adaptive genetic algorithm, a tolerance design method for motion axis error is given to ensure the feasibility of the designed tolerance zone in the assembly process. The feasibility of the method is verified through the design of 29 error tolerance bands for a precision horizontal coordinate boring machine.