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熱間圧延ミルにおける最新のプロセス制御技術

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川崎製鉄技報

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

熱間圧延ミルにおける最新のプロセス制御技術

The Latest Technologies for Process Control in Hot Rolling Mill

浦野 朗(Akira Urano) 岡田 誠康(Masayasu Okada) 柳野 公治(Kouji Yanagino) 要旨 : 熱間圧延におけるプロセス制御技術の中で,ホットストリップミル工場仕上圧延で近年開 発した技術を紹介する。プレビュー AGC は予見制御理論の現場適用を行ったもので,外 乱をあらかじめ考慮し,アクチュエータの性能範囲内で安定して板厚精度の良い板圧延を 可能とした。スケジュールフリー化技術は,オンラインロールプロフィールメータにより ロール磨耗状況を把握し,その情報をもとにオンラインロールグラインダーにて研削する ものであり,ロール研削精度が向上し,幅スケジュール制約が大幅に緩和できた。 Synopsis :

The most recently developed control technologies in a hot strip mill are described. Preview AGC has been developed with a preview control synthesis. It controls roll gaps by using the previous information of disturbances. The disturbances which are concerned are derived from the rolling force, the roll gap and the thickness of a previous stand. The thickness accuracy and the availability of mill have been improved by this technology. An on-line roll grinding (ORG) system with an on-line roll profile meter (OPM) has been developed for the purpose of achieving schedule-free rolling. The ORG smooths the worn and roughed surface of a work roll and OPM can measure the profile of a revolving roll without contact. The data obtained by the OPM are given as feedback information to the ORG. As a result, grinding accuracy has been improved and rolling restriction on width has been relaxed widely.

(c)JFE Steel Corporation, 2003

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