Evaluation method of machining capability of CNC machine tools based on part features

Abstract

A numerically-controlled machine tool machining capacity evaluation method based on part characteristics is characterized in that first, a motion matrix and an error matrix of all moving parts are established according to the modes of motion of the parts of a machine tool; then, the sequences of the matrixes are determined according to the connection relations between the moving parts of the machine tool, and position errors and posture errors of tools are obtained through matrix calculation, and the position errors and the posture errors are collectively called pose errors; next, the characteristic errors generated by the pose errors of the tools are respectively calculated according to the geometric shapes of the characteristics and the basis reference conditions of tolerance; finally, the characteristic machining errors obtained through calculation are compared with the form and location tolerance required by characteristic design, and thus whether the precision requirement of the machine tool is appropriate or not is determined. The fast and direct machine tool precision level evaluation method is provided, so that the problem that the machining capacity of the machine tool is learned by technologists by means of experience or trial and error in the numerically-controlled machining programming is solved; the technological preparation efficiency is improved, the machining cost is reduced, and the numerically-controlled machining quality is guaranteed.

Description

technical field [0001] The present invention relates to a kind of CAM technology, especially a kind of machine tool selection and discrimination method that can be used for technicians to quickly determine whether the selected CNC machine tool can meet the processing accuracy requirements, specifically a kind of CNC machine tool processing capability based on part characteristics Evaluation method. Background technique [0002] Due to market competition, shortening R&D time and reducing R&D costs are becoming more and more important. For mechanical product manufacturing enterprises, more and more high-precision machine tools are used to manufacture products with higher precision and higher value. Therefore, effective use of these devices, reducing downtime and enhancing production efficiency are the keys to reducing costs. Therefore, it is very important to select the appropriate processing equipment during process preparation, and the evaluation of equipment processing ac...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the fact that current technicians mainly rely on experience to judge whether the CNC machine tool used can meet the processing accuracy requirements when performing process programming, and the evaluation of the processing accuracy of the machine tool needs to be completed after the CNC processing program is compiled, which is difficult to apply to time-critical applications. The complex part programming process preparation process, resulting in waste of time and energy, invented a method for evaluating the machining capability of CNC machine tools based on part characteristics

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