Numerical control machine tool feed shaft thermal error monitoring method based on digital twinning

Abstract

The invention discloses a numerical control machine tool feed shaft thermal error monitoring method based on digital twinning. The method comprises the following steps: creating a virtual digital model of an entity numerical control machine tool feed shaft based on three-dimensional modeling software and MATLAB scripting language; creating a driving data acquisition module based on the MATLAB scripting language and Simulink, and acquiring geometric model driving data from a numerical control system; creating a thermal error data acquisition module based on the Simulink, and obtaining thermal error prediction data; connecting all the modules mentioned above through data input and output interfaces on the basis of Simulink, building a feed shaft digital twinning body model, and achieving three-dimensional real-time presentation of feed shaft thermal errors; and creating a user-oriented interactive interface based on the MATLAB scripting language and the Simulink. According to the method,machine tool feed shaft thermal error monitoring can be displayed from datamation to visualization, and a specific implementation method is provided for application of the digital twinning technologyin the field of numerical control machine tool thermal error monitoring.

Description

technical field [0001] The invention relates to the field of error compensation technology of numerical control machine tools and digital twin technology, and specifically relates to a digital twin-based thermal error monitoring method for feed shafts of numerical control machine tools. Background technique [0002] Thermal error is one of the important factors affecting the accuracy of CNC machine tools. Literature shows that thermal error accounts for about 40% to 70% of the total error of the machine tool, which not only affects the processing accuracy of a single workpiece, but also affects the accuracy consistency of batch processing. The thermal error of CNC machine tools includes two parts: feed axis thermal error and spindle thermal error. At present, the research on the thermal error modeling and compensation of the feed axis of CNC machine tools has become the key research direction of relevant scholars. With the development of a new generation of information tech...

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Problems solved by technology

[0005] The present invention aims at the problem that the thermal error compensation of the feed shaft of the existing CNC machine tool fails to realize the three-dimensional real-time visualization of the thermal deformation state of the feed shaft, which leads to the problem that the thermal error monitoring capability of the feed shaft is insufficient, and provides a digital twin technology for the numerical control machine tool. The method of monitoring the thermal error of the feed axis realizes the status parameter from data display to visual presentation in the process of thermal error compensation, changes the traditional "black box" operation mode, and realizes the realistic and real-time perspective monitoring of the thermal error of the feed axis

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