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Thickness Reduction Controller Design for Flying Gauge Change in a Cold Strip Mill

Authors:
Tomoyoshi Ogasahara

Keywords: control; flying gauge change; cold rolling; pysical model; actuator model; model based design.

Abstract:
This paper proposes a new flying gauge change (FGC) scheme for a continuous cold strip mill to achieve thickness reduction in a specified section including a welding point. Because this section is often processed as scrap, thickness reduction is desired as a means of reducing scrap weight. However, this is not possible with conventional FGC, which considers only one thickness change point, because two thickness change points exist simultaneously in the mill due to the short length of the specified section. The proposed scheme utilizes the transition pattern of the position of the two thickness change points during FGC to calculate the set values of the roll gap and roll speed. Thickness reduction is achieved by applying these set values to the rolling mill according to the tracking signals of the two thickness change points. The validity of the proposed method was verified by simulation and experiments. Application of this technology has improved cold strip yield.

Pages: 156 to 161

Copyright: Copyright (c) IARIA, 2014

Publication date: October 12, 2014

Published in: conference

ISSN: 2308-4537

ISBN: 978-1-61208-371-1

Location: Nice, France

Dates: from October 12, 2014 to October 16, 2014