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| Summary of Key Technologies for Error Compensation of CNC Machine Tools |
| LÜ Xuehu, GUO Qianjian, WANG Haotian, WANG Wenhua, ZHU Shuailun, CHEN Shutong |
| Shandong University of Technology, Zibo 255049, China |
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Abstract Error compensation technology is an effective and economical means to improve the accuracy of CNC machine tools. The geometric error, thermal error and cutting force error account for 75% of the total error of the machine tool. Controlling these three errors is the key to improve the machining accuracy of the machine tool. This paper summarizes the traditional indirect measurement method and sample test method, and discusses the characteristics of error measurement methods such as ball instrument test, laser measurement, plane orthogonal grating method, round table sample test and S type specimen test. Several main modeling methods and methods of determining error modeling variables are systematically analyzed. The error compensation technology is analyzed from modifying numerical control code, designing external hardware device and error compensator. Finally, combined with the machine tool error measurement, error modeling, error compensation three parts, the key technology of error compensation is summarized, some key problems existing in the precision optimization of CNC machine tools are pointed out, and the future research direction is forecasted to provide reference for the future CNC machine tool error compensation design.
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2022, 
