J. Polzer, A. Wolff, F. Gorgels, G. Mücke, A. Heβler.

J. Polzer, jan.polzer@bfi.de.

Flatness and straightness are important quality terms in a strip production. Tension levellers are able to reduce flatness defects through strip elongation. This paper presents a new control concept and implementation results of a controlled form-fit-bending unit is able to eliminate strong flatness and cross-bow defects. Furthermore remarkable energy savings in the bridle rolls are achieved.

flatness, straightness, strip production, tension levellers, form4fit4bending systems, energy savings, control systems.

1. Gorgels, F.; Heβler, A.; Mücke, G.; Polzer, J.; Pütz, P.; Wolff, A.; Boguslawsky, K.: New method for the optimization of the strip geometry in strip processing lines, 9. Internat, and 4. Europ. Steel Rolling Conf., 19.–21. Juni 2006, Paris, Frankreich.
2. Degner, M.; Müller, U.; Thiemann, G.; Winter, D.: Topometric on-line flatness measuring system for improved flatness control of hot strip, Proc. 7. Internat. Conf. on Steel Rolling, 9.–11. Nov. 1998, Chiba, Japan, S. 42/47.
3. Morari, M.; Zafiriou, E.: Robust Process Control, Prentice Hall, 1989.

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