Shape Control with Flexible Backup Rolls and Concave-Profiled First Intermediate Rolls

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  • 可撓性に優れたバックアップロールとコンケーブ状プロフィールを付与した第1中間ロールによる形状制御
  • カトウセイ ニ スグレタ バックアップロール ト コンケーブジョウ プロフィール オ フヨ シタ ダイ1 チュウカン ロール ニ ヨル ケイジョウ セイギョ 20ダン センジミア アツエンキ ノ ケイジョウ セイギョ ギジュツ ノ カイハツ ダイ2ホウ
  • —Development of Controlling Technology for Strip Shape in 20-High Sendzimir Mill II—
  • ―20段センジミア圧延機の形状制御技術の開発 第2報―

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Abstract

Flexible shaft backing assemblies (FSBAs) have been introduced into an actual 20-high Sendzimir mill and shape control technology using FSBAs has been investigated. In our previous paper, it was found that the shape control range was extended by the introduction of FSBAs, mainly toward the quarter buckles side and edge waves side. Thus, shape control technology with the combination of FSBAs and the first intermediate rolls given a concave profile partially (concave rolls) was investigated to improve quarter buckles. From simulations carried out using the analysis model which was described in the previous paper, it was found that quarter buckles were improved by optimizing the concave roll profile. In experiments using rolls with the concave profile in the 20-high Sendzimir mill, it was confirmed that quarter buckles were improved under extensive rolling conditions. It was also confirmed that better strip shape was obtained by combining FSBAs and concave rolls than using only concave rolls. FSBAs and concave rolls have been applied to commercial production and have contributed to the improvement of strip shape.

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