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A systematic study on three-roll continuous straightening process for LSAW pipes

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Abstract

Aiming at the low efficiency and unstable accuracy of the current mold-pressing straightening for LSAW pipes, a three-roll continuous straightening process is proposed in this study, which uses the roller straightening instead of mold bending. According to the novel technology, the calculation model of the theoretical straightening moment is derived based on the springback equation of plane bending with small curvature, and the calculation model of initial curvature is established for the new deflection detection method. Furthermore, the numerical simulation analysis is carried out for the LSAW pipe case, and a straightening experimental platform is built for experiments. The research shows that the accuracy of the theoretical moment equation required for straightening is directly related to the initial curvature, rather than the fitting accuracy of the deflection curve, and the low-order simple-fitting curvature calculation model has the highest reliability. In order to control the section distortion and the straightening blind area, the straightening roller should follow the equal diameter design principle, and the empirical formula of span estimation is given. Under the optimal conditions, the straightness of the corrected tubes can be controlled within 1.5‰ and the ovality of the section can be within 0.5%, which proves the feasibility and reliability of the new process. What’s more, the straightening system built in this work, including process analysis software, is conducive to the automation and popularization of the new process.

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Acknowledgements

The authors would like to thank the National Natural Science Foundation of China, National Natural Science Foundation of Hebei province for their financial support, and the Ningbo key research and development plan in 2022.

Funding

This project was funded and supported by the National Natural Science Foundation of China (grant number 52005431), the National Natural Science Foundation of Hebei province (grant number E2020203086), and the Ningbo key research and development plan in 2022 (grant number 2022Z057).

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Authors and Affiliations

  1. School of Mechanical and Energy Engineering, Ningbo Tech University, Ningbo City, 315100, People’s Republic of China

    Chunge Wang, Keke Zhang, Ning Zhang, Rongzhi Li & Bangbang Ma

  2. Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University), Ministry of Education of China, Qinhuangdao City, 066004, People’s Republic of China

    Keke Zhang, Ning Zhang, Rongzhi Li, Bangbang Ma, Gaochao Yu & Jun Zhao

  3. School of Digital Technology and Engineering, Ningbo University of Finance and Economics, Ningbo City, 315175, People’s Republic of China

    Xueying Huang

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  1. Chunge Wang
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Contributions

Chunge Wang: conceptualization, methodology, validation, formal analysis, investigation, data curation, writing—original draft, writing—review and editing, software, visualization; Keke Zhang: conceptualization, methodology, formal analysis, supervision, writing—review and editing; Ning Zhang: conceptualization, methodology, formal analysis, supervision, writing—review and editing; Rongzhi Li: conceptualization, methodology, formal analysis, supervision; Bangbang Ma: conceptualization, methodology, formal analysis, supervision; Gaochao Yu: conceptualization, methodology, formal analysis, supervision; Jun Zhao: conceptualization, methodology, formal analysis, supervision; Xueying Huang: conceptualization, methodology, formal analysis, supervision.

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Correspondence to Xueying Huang.

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Wang, C., Zhang, K., Zhang, N. et al. A systematic study on three-roll continuous straightening process for LSAW pipes. Int J Adv Manuf Technol 124, 165–182 (2023). https://doi.org/10.1007/s00170-022-10397-8

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