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熱間仕上圧延におけるロールの摩耗およびサーマルクラウンの解析

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.11 (1979) No.2

熱間仕上圧延におけるロールの摩耗およびサーマルクラウンの解析

An Analysis of Wear and Thermal Crown of Work Rolls in Hot Strip Rolling

鑓田 征雄(Ikuo Yarita) 玉井 敏行(Toshiyuki Tamai) 北村 邦雄(Kunio Kitamura) 相 原 正樹(Masaki Aihara) 中川 喜左衛門(Kichizaemon Nakagawa) 福島 巌(Iwao Fukushima) 要旨 : 熱間圧延材の幅方向の板厚精度の向上を図るため,仕上圧延時のワークロールの表面温度, 摩耗およびサーマルクラウンの変化を千葉製鉄所熱間圧延工場仕上圧延機において調査し, これらを定量的に把握するとともに,板プロフィルに及ぼす影響を明らかにした。また, 有限要素法による熱伝導解析を行い,圧延材からの熱流束,熱伝達係数,クーラントのゾ ーン制御および圧延ピッチがサーマルクラウンに及ぼす影響を定性的に明らかにした。こ の結果をもとに,ロールクーラント流量,クーラントのゾーン制御および圧延ピッチなど によるサーマルクラウンの制御効果を実機圧延機により検討し,これを定量的に明かにし た。 Synopsis :

In order to improve the uniformity of transverse thickness of hot rolled strip, the surface temperature distributions, the wear profiles and change of the thermal crowns of work rolls in hot rolling were investigated and quantitatively analyzed at finishing mills of Hot Strip Mill in Chiba Works, Kawasaki Steel Corp., and their influences on strip profile were also clarified. Furthermore, effects of heat flow from strip to work roll, heat transfer coefficient, zone control of cooleant and rolling pitch on roll thermal crown were theoretically analyzed by heat transfer analysis of axi-symmetric roll by applying the finite element method. On the basis of both analyses, practical control methods of the thermal crown were made clear at actual mill.

(c)JFE Steel Corporation, 2003

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