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Development of a thermal compensator based on PLC for Fanuc CNC system

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Abstract

To improve the machining accuracy and stability of CNC machine tools, the lead screw is divided into several segments, and the action law of single section thermal deformation is analyzed, then the thermal deformation model of lead screw base on subsection processing is established. Then the relative relation of thermal deformation of each segment, the cumulative thermal drift of thermal deformation of each segment itself, the total thermal deformation of the free end of lead screw, and the relationship between them are obtained. Then, a segmented thermal compensator based on PLC for CNC system is developed. The thermal error of each segment of the lead screw is detected and compensated separately, and then the thermal error of the segment where the machine tool worktable moves to the different segment of the lead screw is compensated. Tests show that the segmented thermal compensator has achieved good actual compensation effect, so that the positioning error caused by thermal deformation of each shaft can be reduced by more than 50%.

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Acknowledgments

We gratefully acknowledge the Ministry of Science and technology of the People’s Republic of China and the Sichuan Provincial Education Department for the support and their assistance and all who contributed to conduction of this study.

Funding

This research was funded by the National Key Research and Development Program of China, grant number 2018YFB1701502, and the Scientific research Fund of Sichuan Provincial Education Department, grant number 17CZ0001.

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Authors and Affiliations

  1. Sichuan Institute of Industrial Big-data Applications, Chengdu, 611730, China

    Yonghong Deng

  2. School of Automobile and Transportation, Chengdu Technological University, Chengdu, 611730, China

    Jian Liu

  3. Department of Mechanical and Electrical Engineering, Liaocheng University Dongchang College, Liaocheng, 252000, China

    Dong Li

Authors
  1. Yonghong Deng
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  2. Jian Liu
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  3. Dong Li
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Contributions

Conceptualization, Y.H. D. and J. L.; methodology, Y.H. D. and D. L.; validation, Y.H. D. and J. L.; formal analysis, Y.H. D. and J.L.; data interpretation, Y.H. D. and D. L.; writing—original draft preparation, Y.H. D.; writing—review and editing, J. L.; visualization, J. L.; supervision, J. L.; project administration, J. L.; funding acquisition, J. L. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Jian Liu.

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Deng, Y., Liu, J. & Li, D. Development of a thermal compensator based on PLC for Fanuc CNC system. Int J Adv Manuf Technol 112, 1885–1902 (2021). https://doi.org/10.1007/s00170-020-06454-9

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  • DOI: https://doi.org/10.1007/s00170-020-06454-9

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