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Adaptive threading strategy based on rolling characteristics analysis in hot strip rolling

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Abstract

In order to improve the threading stability and the head thickness precision in tandem hot rolling process, an adaptive threading strategy was proposed. The proposed strategy was realized by the rolling characteristics analysis, and factors which affect the rolling force and the final thickness were determined and analyzed based on the influence coefficients calculation process. An objective function consisting of the influenced factors was founded, and the disturbance quantity was obtained by minimizing the function with the Nelder-Mead simplex method, and the proposed adaptive threading strategy was realized based on the calculation results. The adaptive threading strategy has been applied to one 7-stand hot tandem mill successfully, actual statistics data show that the predicted rolling force prediction in the range of ±5.0% is improved to 97.8%, the head thickness precision in the range of ±35 μm is improved to 98.5%, and the threading stability and the head thickness precision are enhanced to a high level.

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Authors and Affiliations

  1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, China

    Wen Peng  (彭文), Shu-zong Chen  (陈树宗), Dian-yao Gong  (龚殿尧) & Dian-hua Zhang  (张殿华)

  2. Research Institute of Technology, Shougang Group, Bei**g, 100041, China

    Zi-ying Liu  (刘子英)

Authors
  1. Wen Peng  (彭文)
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  2. Shu-zong Chen  (陈树宗)
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  3. Dian-yao Gong  (龚殿尧)
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  4. Zi-ying Liu  (刘子英)
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  5. Dian-hua Zhang  (张殿华)
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Corresponding author

Correspondence to Wen Peng  (彭文).

Additional information

Foundation item: Project(51504061) supported by the National Natural Science Foundation of China

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Peng, W., Chen, Sz., Gong, Dy. et al. Adaptive threading strategy based on rolling characteristics analysis in hot strip rolling. J. Cent. South Univ. 24, 1560–1572 (2017). https://doi.org/10.1007/s11771-017-3561-2

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  • DOI: https://doi.org/10.1007/s11771-017-3561-2

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