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A digital twin-based thermal error monitoring method for the feed axis of CNC machine tools

A CNC machine tool and feed axis technology, which is applied in the direction of program control, computer control, general control system, etc., can solve the problems of insufficient thermal error monitoring ability of the feed axis and failure to realize three-dimensional real-time visualization of the thermal deformation state of the feed axis, etc. , to achieve the effect of real-time visual monitoring

Active Publication Date: 2020-11-03
DALIAN UNIV OF 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

Method used

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  • A digital twin-based thermal error monitoring method for the feed axis of CNC machine tools
  • A digital twin-based thermal error monitoring method for the feed axis of CNC machine tools
  • A digital twin-based thermal error monitoring method for the feed axis of CNC machine tools

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Embodiment Construction

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] Taking a certain type of vertical milling machine as an example, the embodiment of the present invention will be described in detail. The CNC system model of the vertical milling machine is GJ301.

[0027] The first step is to create a virtual digital model of the feed axis of the CNC machine tool.

[0028] According to the size parameters of each component of the feed shaft of the vertical milling machine, based on the Solidworks software, the bed and the three feed shafts of X, Y, and Z, the screw, nut, bearing, guide rail, slider, worktable, and servo motor were established. Geometric models of key components such as shaft couplings, etc., and add fits to each component model according to the actual assembly relationship. Import the assembly into Simulink, an...

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Abstract

A digital twin-based thermal error monitoring method for the feed shaft of a CNC machine tool, the steps are as follows: create a virtual digital model of the feed shaft of a solid CNC machine tool based on 3D modeling software and MATLAB script language; create a drive data acquisition based on MATLAB script language and Simulink module to obtain geometric model drive data from the CNC system; create a thermal error data acquisition module based on Simulink to obtain thermal error prediction data; connect the above modules through data input and output interfaces based on Simulink to build a digital twin model of the feed axis to realize Three-dimensional real-time display of feed shaft thermal error; user-oriented interactive interface is created based on MATLAB scripting language and Simulink. This method can realize the thermal error monitoring of the feed axis of the machine tool from data display to visual presentation, and provide a specific implementation method for the application of digital twin technology in the field of thermal error monitoring of CNC machine tools.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/4065
CPCG05B19/4065G05B2219/37616
Inventor 刘阔宋磊黄任杰沈明瑞王宏慧王永青
Owner DALIAN UNIV OF TECH
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