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Modeling and analysis of axial thermal error in machining space of double-swing five-axis machine tool

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Abstract

The axial thermal error of five-axis CNC machine tools is a significant factor affecting the machining accuracy. To predict the axial thermal error during the machining process, a method is proposed to model axial thermal error in the machining space of five-axis machine tools with a double swing table. The comprehensive thermal error model of the machining space is first established, which includes the axial thermal error of the spindle, worktable, and other components. The spindle is then simplified as a rod, and an analytical model for the axial thermal error of the spindle is developed based on the heat transfer governing equations. This model enables the determination of the time-varying behavior of the axial thermal error at different speeds. Furthermore, the worktable is simplified as a circular plate, and the analytical model for the axial thermal error of the worktable is established based on the thermal bending differential equation of the small deflection circular plate. This model allows for the determination of the time-space variation of the axial thermal error at different radii of the worktable. Finally, based on the axial comprehensive thermal error field of the five-axis CNC machine tool processing space, the distribution of the axial thermal error in the machine tool processing space under thermal equilibrium conditions is revealed. Experimental verification of the proposed model is conducted on the VMC-C50 double swing five-axis CNC machine tool. The experimental results show that the error between the measured axial thermal error value and the axial comprehensive thermal error model value is within 26.6%, thus confirming the accuracy of the proposed model.

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Used or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This research was supported by the State Key Program of National Natural Science Foundation of China (51720105009).

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Authors and Affiliations

  1. Key Laboratory of Advanced Manufacturing Intelligent Technology of Ministry of Education, Harbin University of Science and Technology, Harbin, 150080, China

    Yupeng Wang, Shi Wu, Xianli Liu, Yong Zhang & Chunfeng Wang

Authors
  1. Yupeng Wang
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  2. Shi Wu
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  3. Xianli Liu
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  4. Yong Zhang
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  5. Chunfeng Wang
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Contributions

Shi Wu and Yupeng Wang contributed to the conception of the study; Yupeng Wang conducted axial thermal error experiments on machine tools and analyzed axial thermal error data; Xianli Liu supervised and guided this article; Yong Zhang and Chunfeng Wang designed an experimental project and installed an experimental system. All authors read and approved the final manuscript.

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Correspondence to Shi Wu.

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Wang, Y., Wu, S., Liu, X. et al. Modeling and analysis of axial thermal error in machining space of double-swing five-axis machine tool. Int J Adv Manuf Technol 128, 5179–5194 (2023). https://doi.org/10.1007/s00170-023-12227-x

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  • DOI: https://doi.org/10.1007/s00170-023-12227-x

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