Abstract
The dynamic characteristics of the XY worktable are thoroughly analyzed in this study to accurately compensate the measurement errors of on-machine measurement systems caused by the dynamic and static characteristics under multiple factors. The dynamic positioning error model of the XY worktable motion components is established, and the theoretical model of the dynamic positioning error of the XY worktable is derived. The actual parameters of the experimental platform for the correlation error of CNC machine tools are substituted into the model for theoretical calculation and analysis. Results show that the motion speed of the worktable, the weight of the measured workpiece, the installation position of the workpiece, and the friction force are the main factors causing the dynamic positioning error. Dynamic positioning error analysis and verification experiments were conducted to verify the validity of the proposed theoretical model. Experimental results show that a regular change occurs between the dynamic positioning error and the movement speed of the XY worktable, and the actual measurement results are basically consistent with the theoretical calculation results. The research results can lay a good foundation for establishing the measurement error prediction and compensation model of on-machine measurement systems of CNC machine tools and improving its measurement accuracy.
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This work was supported by National Natural Science Foundation of China (Grant No.51675004 and Grant No. 51775163).
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Li Li is a Ph.D. student in Mechanical Engineering at Anhui University of Science and Technology. Her research interests include precision machinery and precision measurement.
Hongtao Yang received his B.S. and M.S. in Measurement and Control Technology and Instrument from Anhui University of Science and Technology in China in 1993 and 2001, respectively, and his Ph.D. from Hefei University of Technology in 2007. He is now the Professor of Mechanical Engineering at Anhui University of Science and Technology. His main research interests are precision testing technology, modern precision theory and application.
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Li, L., Yang, H., Zhang, Y. et al. Dynamic positioning error analysis and modeling of CNC machine tool guideway system. J Mech Sci Technol 35, 1955–1967 (2021). https://doi.org/10.1007/s12206-021-0413-7
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DOI: https://doi.org/10.1007/s12206-021-0413-7