Comprehensive Evaluation of CNC Machine Tools Accuracy Based on AHP

In order to evaluate the accuracy of a numerical control machine tool comprehensively, the accuracy evaluation index system of a numerical control machine tool was established, and the priorities of accuracy indexes were determined by analytic hierarchy process method. Taking a five-axis numerical control machine tool for example, each accuracy index of it was studied by using fuzzy comprehensive evaluation, and a membership function was constructed by the intermediate form trapezoidal distribution. The evaluated result indicated that the accuracy of this numerical control machine tool was excellent. As a reference, the method presented in this paper could be used to evaluate the accuracy of other numerical control machine tools.