An Approach for Error Allocation of Heavy-duty CNC Machine Tools

Abstract

Geometric errors are of great influence to the machining accuracy of machine tools, so they should be given special consideration in the design of machine tools. This paper proposes an approach for error allocation of machine tools. Based on D-H and Monte Carlo simulation (MCS), the reliability and sensitivity analysis were formed into two mathematics models to calculate the machining accuracy reliability and identify the error parameters which have larger influence to the machining accuracy reliability respectively. The proposed approach was performed on a heavy-duty CNC machine tool, and then it was verified by an experiment.