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Development of Technology for Setting Rolling Speed of Finishing Rolling Process in Hot Strip Mill

열연 마무리 압연공정 압연롤 회전속도 설정 기술 개발

  • 홍성철 (영남대학교 전기공학과) ;
  • 이해영 (영남대학교 전기공학과)
  • Received : 2013.08.05
  • Accepted : 2013.09.17
  • Published : 2013.11.30

Abstract

Rolling speed, roll gap, and cooling pattern in hot strip finishing mill process should be determined before inserting strip into roll. Such parameters are initially calculated by a mathematical set-up model. The technique to find adequate roll speed via a mathematical model has inherently limit because required working conditions are various and rolling process is nonlinear. To improve the accuracy of initial rolling speed for a finishing mill, this paper suggests a correction technology for initial rolling speed. The proposed method was implemented in hot strip mill process. As the results, the magnitude of width error in strip head-end part caused by excessive strip tension was decreased remarkably.

Keywords

References

  1. Morio Saitoh et al., "Development of high-accuracy control system for hot strip mill", NKK Technical review, No.61, 1991, pp. 10-17.
  2. Minoru Tanaka et al., "Decoupled automatic gauge control for universal rolling mills", NIPPON STEEL Technical report, No.27, Oct., 1985, pp. 51-62.
  3. B. Hum, H. W. Colquboun, J. G. Lenard, "Measurements of friction during hot rolling of aluminum strips", Journal of Materials Processing Technology, 60, 1996, pp. 331-338. https://doi.org/10.1016/0924-0136(96)02350-3
  4. Jarl, M., Friction and forward slip in hot rolling, Scandinavian Journal of Metallurgy, 17, 1988, pp. 2-7.
  5. Kwak, W.J., Y.H. Kim, J.H. Lee and S.M. Hwang., A Precision On-line Model for the rediction of Roll Force and Roll Power in Hot-Strip Rolling. Metallurgical and Materials Transactions, 33A, 2002, pp.3255-3272.
  6. Liu, Y.J., A.K. Tieu, D.D. Wang and W.Y.D. Yuen., Friction measurement in cold rolling, Journal of Materials processing Technology, 111, 2001, pp. 142-145. https://doi.org/10.1016/S0924-0136(01)00541-6
  7. Piispanen, V., Forward Slip in the Hot Rolling of Sheet. Scandinavian Journal of Metallurgy, 7, 1978, pp. 88-90.
  8. Moon, Y. H., Jo, I. S. and Van Tyne, C. J., " Control Scheme Using Forward Slip for a Multi-stand Hot Strip Rolling Mill," KSME International Journal, Vol. 18, No. 6, pp. 972-978, 2004.