Design method for improving machine tool machining precision

Abstract

The invention discloses a design method for improving machine tool machining precision. The design method comprises three steps of: (1) establishing a machine tool dynamic error transmission model according to a machine tool movement transmission chain; (2) identifying error sensitive parts of a machine tool in such a manner that according to the established machine tool dynamic error transmission model, dynamic error sensitive coefficients of all parts corresponding to all machining positions of a workpiece are calculated, the deformation amounts of all the parts of the machine tool in each direction are simultaneously analyzed, and finally the error sensitive parts are identified according to the dynamic error sensitive coefficients and the deformation amounts of all the parts; and (3) simultaneously carrying out adjustment on the layout and rigidity of the error sensitive parts, reducing the sensitive coefficients of the parts, simultaneously reducing the deformation amounts of the part, and improving the machining precision of the machine tool. The layout change of the machine tool and the rigidity improvement of the error sensitive parts of the machine tool can be carried out in the design beginning stage, a basis is provided for the design of the high-precision machine tool, the integral machining error of the machine tool is reduced, and the manufacturing cost of the machine tool is lowered.

Description

technical field [0001] The invention relates to a design method for improving the machining accuracy of a machine tool. Background technique [0002] With the increasing demand of machine tools, how to improve the performance of machine tools has become a research hotspot. The performance of the machine tool mainly includes dynamic response characteristics, overall machine quality, structural rigidity, machining accuracy, etc. Machining accuracy is an important parameter to evaluate the performance of machine tools. How to improve the machining accuracy of machine tools is the development trend of machine tools in the future. The processing accuracy of the machine tool affects the processing quality of the product, so how to improve the processing accuracy of the machine tool is of great significance. The researches on improving the machining accuracy of machine tools at home and abroad mainly focus on the error compensation of the machining process; however, the machining...

AI Technical Summary

Problems solved by technology

The research on improving the machining accuracy of machine tools at home and abroad mainly focuses on the error compensation of the machining process; however, the machining error compensation method of machine tools requires complex calculations to obtain the compensation amount, and the effect is not ideal in terms of real-time machining

And error compensation requires expensive measuring devices and controllers, which increases the manufacturing cost of the machine tool

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