Measuring and adjusting process-considered tolerance design method of precise machine tool

Abstract

The invention discloses a measuring and adjusting process-considered tolerance design method of a precise machine tool, which comprises the steps of: firstly defining a related coordination system according to a key feature plane; then determining a state space equation and a basic coefficient matrix thereof of a machine tool assembly; next, establishing a cost target function, obtaining an optimal adjustment sequence by a discrete system output regulator so as to convert the state space equation into a Gauss-Markov random process equation; then obtaining a covariance matrix, and performing iteration computation to obtain the covariance matrix after integral assembly is finished; computing a corresponding function relationship between a total precision index and a part precision index of the machine tool according to the covariance matrix after the integral assembly is finished; finally, establishing a function relation between a precision total cost and a part precision and solving to obtain an optimal part tolerance allocation result. The method can be used for accurately and reliably analyzing the tolerance of the machine tool, thus ensuring the precision performance of the machine tool.

Description

【Technical field】 [0001] The invention belongs to the field of mechanical design, and in particular relates to a precision machine tool tolerance design method considering measurement and adjustment techniques. 【Background technique】 [0002] Machine tool precision performance is the basic index of machine tool design, which is comprehensively guaranteed through design, manufacturing and assembly. However, my country's current machine tool precision design cannot get rid of the dependence on experience, and the tolerance design and assembly process planning are mainly carried out through analogy and query manuals. Lack of accurate and reliable tolerance analysis and assembly process planning and design tools. In order to increase the certainty of design success, it is often through repeated trial production by the company and repeated revisions by the designer to finalize the design, thus missing the good opportunity to bring the newly developed product to the market and in...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a precision machine tool tolerance design method considering the measurement and adjustment process in view of the problems of relying on the experience of engineers in the existing machine tool tolerance design process, and the lack of precision and excess precision. Reliable analysis to ensure the precision performance of machine tools

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