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冷間タンデムミルにおける全長・全幅板厚制御技術

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川崎製鉄技報

KAWASAKI STEEL GIHO Vol.31 (1999) No.4

冷間タンデムミルにおける全長・全幅板厚制御技術

High-accuracy Gauge Control Technologies over the Full Length and Full Width of Cold Rolled Strip

水島 成人(Narihito Mizushima) 深谷 敏弘(Toshihiro Fukaya) 鞍掛 浩(Hiroshi Kurakake) 要旨 : 近年,お客様の品質要求の厳格化により,冷間圧延鋼板のコイル長手方向(圧延方向)お よび幅方向板厚精度は,従来以上に極めて重要な品質管理項目となっている。川崎製鉄で は,長手方向板厚精度の向上を図るために,ミル主機ドライブの高応答化,全スタンド AGC システム,およびダイナミックセットアップ制御システムを開発した。幅方向板厚精度に 関しては,片テーパ付きワークロールシフト圧延法とエッジドロップ計を用いたエッジド ロップ制御システムを開発した。これらの長手方向・幅方向の板厚制御システムを各冷間 タンデム圧延機にて実用化したことにより,冷間圧延鋼板の全長・全幅にたり 60.5% 以内 の高精度な板厚品質を達成した。 Synopsis :

At tandem cold rolling mills in Kawasaki Steel, by means of applying newly developed strip longitudinal (rolling) and transverse gauge control systems, high accuracy of thickness of within 60.5% has been achieved over the full length and full width of cold rolled strip, as gauge accuracy in a coil in longitudinal and transverse directions has become an extremely important quality control item in the manufacturing of cold rolled sheets due to the stricter quality requirements of customers, in recent years. The longitudinal gauge accuracy has been improved by the development of a high-response drive system for a mill mair motor, an all-stands gauge control system and a dynamic set-up control system. The transverse gauge accuracy has been improved by applying a one-side tapered work roll shifting method and the development of an edge drop control system in terms of the optimum use of an edge drop sensor.

(c)JFE Steel Corporation, 2003

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