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鋼帯のエッジ研削装置の開発

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.13 (1981) No.2

鋼帯のエッジ研削装置の開発

Development of an Edge Grinding Device for Hot Rolled Coil

椎 葉 末信(Suenobu Shiiba) 秋田 一成(Kazushige Akita) 山崎 忠(Tadashi Yamazaki) 香 西 伸 時 (Shingi Kosai) 丹 羽 康 之 (Yasuyuki Niwa) 神 谷 昭 彦 (Akihito Kamiya) 佐藤 隆三(Ryuzo Sato)

要旨 : ステンレス鋼のホットコイルをトリミングなしで冷間圧延する際の問題点は,エッジ部の ミクロクラックが原因となって生じる耳割れである。このミクロクラクを除去する方法と して,溶断,切削などの方法も考えられるが,円板形砥石を使用し,その回転軸をホット コイル進行方向に対し,並行に配置した研削方法が最良であった。この方法の実用化によ り,一例として,ライン上のホットコイルをエッジから0.5mm 研削した場合,板厚 4.5mm の母板を 0.4~0.7mm の薄物まで中間焼鈍なしで圧延でき,SUS430 鋼の冷延後スキンパ ス歩留りが3%向上した。 Synopsis :

Usually, hot rolled stainless steel coils are trimmed at both edges before cold rolling on the Sendzimir Mill, in order to prevent edge cracking. The authors have developed a new efficient trimming method to improve physical yields. This report introduces the following: (1) Edge cracking by cold rolling was caused by small edge crecks of hot rolled stainless steel coils. (2) After removing the small edge cracks by grinding an edge width of 0.5mm, the coil can be cold rolled without an edge trimming of 20 to 25mm in width. (3) As method of removing the small cracks, the Edge Grinding System has been developed, which improves physical yield at skin pass rolling by 3% in the case of SUS 403 steels. (4) In the Edge Grinding System, horizonal grinders are provided on both sides of the strip by installing their rotary shafts in parallel to the direction of the passing line

(c)JFE Steel Corporation, 2003

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