Numerical control machine tool error real-time compensation system based on virtual instrument

Abstract

The invention relates to a numerical control machine tool error real-time compensation system based on a virtual instrument, which belongs to the field of numerical control machine tool error compensation technology. According to the invention, an error compensation hardware system and a software system are comprised. As the carrier and the executive component of the software, the hardware system is for realizing the connection and communication of various function modules, data storage, and man-machine interaction. The software system based on virtual instrument programming is for realizing the preprocessing of temperature and an error data signal, the modeling of a machine tool error mathematical model, the real-time calculation of the error data, the data interaction between the compensation system and PLC, the optimization of an expert system, and the automatic identification and optimization of a self learning system. According to the invention, with the adoption of a method that combines a virtual instrument technology and a software compensation technology and with the collaborative work of the hardware system and the software system, the prediction and the real-time compensation of various processing errors of the numerical control machine tool is effectively realized, and the robustness and the reliability of the compensation system are improved based on the expert system and the self learning model, thus the system provided by the invention has the characteristics of simple operation and wide applicability.

Description

technical field [0001] The invention relates to a compensation system in the technical field of machine tool error compensation, in particular to a virtual instrument-based real-time error compensation system for numerically controlled machine tools. Background technique [0002] After years of continuous development, my country's machine tool industry has made great leaps. In terms of the overall production scale, my country's annual machine tool production has reached the same level as the major machine tool producing countries. But as far as the technical level of CNC machine tools is concerned, it is only ranked in the second echelon in the world. At present, the CNC machine tools produced in my country account for about 35% of the domestic CNC machine tool market share, and the rest need to be imported from abroad, especially in the high-end CNC machine tool market, most of which can only be imported from foreign machine tool production powerhouses. The production of h...

AI Technical Summary

Problems solved by technology

According to the structure and principle of the real-time compensation device provided by the invention, a machine tool positioning error compensation device integrating a calculation processing module, a temperature sensor acquisition and transmission module, and a numerical control interface control module is mainly discussed. The data interaction between PMCs is used to realize the compensation of positioning errors. However, this invention also uses the preset mathematical model to calculate the compensation value, and it is impossible to train and correct the model for self-learning in actual use.

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