A comprehensive performance evaluation method of CNC machine tools based on the improved pull-off grade method

Abstract

The invention relates to a comprehensive performance evaluation method of a numerical control machine tool based on an improved pull-out method, which belongs to the technical field of performance evaluation of a numerical control machine tool. The linear proportional method is used to standardize the data of various performance indicators of the machine tool. The subjective weights of indicators at all levels are determined based on the ordinal relationship analysis method, the two objective weights of indicators at all levels are determined by the entropy weight method and the mean square error method, and the subjective and objective weight information is synthesized based on the principle of vector Pearson correlation coefficient. The comprehensive weight is used to weight the index, the final weight coefficient of the index is determined by the positive definite matrix corresponding to the weighted index matrix, and the comprehensive evaluation value of the three-level index is obtained based on the linear weighted evaluation function. Finally, a similar method is used to calculate the comprehensive evaluation value of the large system layer by layer. The invention is used for the comprehensive performance evaluation of various numerical control machine tools and the horizontal comparison of the specific performance of different machine tools, and provides a scientific and operable evaluation method and process for the comprehensive performance evaluation of the machine tools.

Description

technical field [0001] The invention belongs to the technical field of performance evaluation of numerical control machine tools, and specifically relates to a method for comprehensive evaluation of performance of numerical control machine tools based on an improved grade-opening method and comprehensive integration weighting. Background technique [0002] As the basic equipment of mechanical manufacturing, CNC machine tools are affected by many factors in processing performance, and finally reflected in the pros and cons of product quality. Therefore, in order to obtain products with good comprehensive performance, it is necessary to improve the processing performance of the machine tool. Performance evaluation is a key part of it. Before processing a batch of parts, conduct a comprehensive and comprehensive evaluation of the CNC machine tool to grasp the current operating status of the CNC machine tool, so as to ensure that the CNC machine tool can work in a state of excel...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a comprehensive performance evaluation method of machine tools based on the improved method of pulling out grades. The evaluation results of this method not only have a high degree of discrimination, but also facilitate vertical or horizontal comparison between major systems and subsystems , solve the problem that the comprehensive performance of the machine tool cannot be quantitatively evaluated, and provide a systematic and scientific basis for the evaluation of the comprehensive performance of the machine tool

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