Primetals Technologies Germany GmbH (Erlangen, Germany):

I. Gafur, e-mail: ilhom.gafur@primetals.com

M. Tunk

M. Kurz

Thyssenkrupp Steel Europe (Duisburg, Germany):
V. Schlecht, Dr.

Primetals Technologies Austria GmbH (Linz, Austria):
H. Hlobil

The described control system has been put into practice at the No. 1 rolling mill of thyssenkrupp Europe plant in Duisburg. The first testings have been conducted for ordinary rolled material, later – for special steel grades. Statistical analysis covered 18,000 coils, and each rolled strip has been described via absolute mathematical expectation and standard deviation of measured thickness wedging along the strip length. The average values of these parameters for different steels are presented. It is stated that absolute mathematical expectation of thickness wedging point doesn’t vary, but standard wedging thickness deviation along strip length can be improved substantially, not depending on steel grades. Passed durable testings were characterized by absence of any technological violations caused by mistakes in strip motion control in comparison with 0.1 % metal rejects standard value, what is completely allowable. The developed measuring and control system is now permanently used at the No. 1 rolling mill of thyssenkrupp Europe plant in Duisburg.

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2. Galkina A., Gafur I., Schlacher K. Model predictive control with linear programming for the strip infeed in hot rolling mills, IFAC 2017 World Congress, Toulouse, Frankreich, 9.–14. Juli 2017 (demnächst).
3. Galkina A., Schlacher K., Gafur I. BHM 161 (2016) Nr. 11. S. 520/25.
4. https://www.thyssenkrupp-steel.com/de/newsroom/pressemittei-lungen/pressemitteilung-2505.html
5. Hlobil H., Gafur I., Ott D., Hackl M. Promising approach for extension of camber sensor regarding lengthwise and crosswise speed measurement of strip between the hot strip finishing mill stand and its benefi ts for control strategy, 10^th Int. Rolling Conf., Graz, Österreich, 6.–9. Juni 2016.
6. Lorenz A., Maierhofer A., Hlobil H. Next generation strip steering controller using optical measurement of strip for hot rolling finishing mills, ESTAD Conference, Düsseldorf, Deutschland, 15.–19. Juni 2015.
7. Kurz M., Schmidt B., Krautwurst D., Clark M. Functional enhancements to improve the rolling process within plate and steckel mills, ibid.
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9. Gafur I., Schlecht V., Tunk M., Hlobil H. New vision-based strip steering control for HSM, AISTech 2017. Nashville, USA, 8.–11. Mai 2017.