Abstract
Suppressing thermal deformation is an effective measure to reduce the thermal error of CNC (computer numerical control), and the machining accuracy of CNC directly determines the quality and accuracy of parts. A cooling pipe is designed for the non-heat source parts with large swing head deformation to restrain its thermal deformation. At present, there is a lack of research results in this field. Through the finite element simulation analysis of 5AS01 five-axis direct drive swing head, the thermal deformation of swing head and motorized spindle is compared. It has been determined that the thermal deformation of the shell in the Z- and X-axes has a significant impact on the precision of the swing head’s machining; thus, steps must be taken to limit its deformation. The cooling position was determined by simulating the normal working condition of the shell and gray correlation analysis. Capillary copper tube was connected with water-cooling system for cooling, and the heat transfer performance between the shell and copper tube was improved by using heat conductive silica gel sheet. Comparing the shell cooling simulation with the shell cooling experiment, it is found that both of them have the same trend in restraining the thermal deformation of the shell, reducing the thermal deformation in X direction by more than 50% and in Z direction by more than 24%. It verifies the accuracy of the cooling simulation model and the effectiveness of this cooling method, which can effectively reduce the thermal deformation of the shell and improve the machining accuracy of the machine tool.
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Supported by Opening Project of the Key Laboratory of Advanced Processing Technology and Intelligent Manufacturing (Heilongjiang Province), Harbin University of Science and Technology (KFKT202205), and National Natural Science Foundation of China (grant number: 52075134).
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Z. L., Q. W., W. Z., B. W., J. D., B. S., and Y. B. The first draft of the manuscript was written by Z. L., and all authors commented on the previous versions of the manuscript. All authors read and approved the final manuscript.
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Li, Z., Wang, Q., Zhu, W. et al. Study on thermal deformation and cooling suppression of five-axis direct drive swing head. Int J Adv Manuf Technol 131, 515–527 (2024). https://doi.org/10.1007/s00170-024-13157-y
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DOI: https://doi.org/10.1007/s00170-024-13157-y