Optimization of the process of evaluation of quality indicators of coordinated holes by statistical methods

Abstract

The basic stages and approaches to the estimation of quality indicators of coordinated dimensions of machine-building openings are determined and analyzed. The main aspects for the process of evaluating the quality of the dimensions of the apertures are determined using a new model of statistical methods. The main aspects of the accuracy of estimating the sizes of coordinated holes as a complex index are revealed. The basic causes of errors in the processing of coordinated holes during machining are determined and analyzed. Considered random errors that arise during the evaluation of indicators of coordinated holes for different types of processing. The standardized quality indexes of accuracy of sizes of apertures at processing by different methods are considered. The results of coordinated hole processing were analyzed using Pearson's agreement criterion. The model of quality evaluation using the parameters of statistical analysis is analyzed. The numerical characteristics of the proposed model of quality evaluation are obtained for different types of processing.