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Title

CUTTING EDGE TECHNOLOGY FOR HSMS – STRIP STEERING CONTROL

Authorship

Jepsen, Olaf; Mengel, Christian; Breuer, Michael; Caballero, Luis Acainas

Jepsen, Olaf

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Mengel, Christian

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Breuer, Michael

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Caballero, Luis Acainas

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DOI

10.5151/9785-9785-32466

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Abstract

Stability of the hot strip mill rolling process remains a main topic when it comes to processing thin and hard materials. Strip steering especially at the end of rolling and tail out rips are a main source of unscheduled down times in a Hot Strip Mill. Main focus of this paper is new developments in this field of mill operation targeting at mill stability and quality. An overview of SMS group developments in the recent years regarding equipment and control strategies is given. The new side guiding system in the entry area of the finishing mill is introduced and explained with operational examples. The system provides reproducible conditions for the threading process and during rolling. Steering control has a direct benefit on availability of the mill. New developments of the roll alignment control strategies based on roll force and mill stand entry guide force measurement will be presented. Additionally a camera based measuring system is introduced that generates a direct process feedback of strip position. It provides together with the roll alignment control the necessary control parameters for adjusting the roll gap and guiding the strip correct centered through the mill. As a summary the SMS group system is explained combining all features.

Keywords

Hot rolling, steering, Quality, Rolling stability, Control