Abstract
At present, the thermal deformation law of the horizontal CNC lathe spindle has not been observed, whereas no effective model for the radial thermal drift error for the CNC lathe spindle exists. In order to solve these problems, the thermal deformation of the spindle was investigated on a CNC lathe, and the temperatures along with the radial thermal drift errors of various rotation speeds were obtained. Based on the test result analysis, the radial thermal drift error mechanism and the complete thermal deformation during the warmup and cooldown phases were expounded. The “Liu-loop” of the spindle was drawn, and the corresponding two basic characteristics were described. Ten types of spindle thermal deformations are listed, and the relationship between the radial thermal drift error and the temperatures of the key points was established by a physically based modeling method. The criteria for the spindle thermal determination and the compensation value expression for the workpieces with various lengths were given. Finally, the effectiveness of the proposed model was proved by simulations and experiments.
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Acknowledgements
This project are supported by National Natural Science Foundation of China (Grant No. 51775085), National Natural Science Foundation of China (Grant No. U1608251) and the Fundamental Research Funds for the Central Universities (DUT16RC(3)122). Moreover, the authors thank the anonymous referees and editor for their valuable comments and suggestions.
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Liu, K., Li, T., Li, T. et al. Thermal behavior analysis of horizontal CNC lathe spindle and compensation for radial thermal drift error. Int J Adv Manuf Technol 95, 1293–1301 (2018). https://doi.org/10.1007/s00170-017-1273-2
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DOI: https://doi.org/10.1007/s00170-017-1273-2