Hot broadside rolling method and rolling mill

Abstract

Abstract PURPOSE:To roll a thick plate and hot rolled sheet having various widths efficiently by disposing two pairs of work rolls between a pair of backup rolls, providing bulging parts having different widths to each of the work roll pairs, and perform tandem rolling. CONSTITUTION:Work rolls 11a, 11b having bulging parts which are respectively different in widths are disposed between a pair of backup rolls in hot rolling of a slab 1. After the slab 1 is heated, the slab is rolled down at the center by the width part W1 in the bulging part of the roll 11a; at the same time, the slab is rolled down to the same extent by the width W2 in the bulging part of the roll 11b. The slab is partially rolled twice simultaneously by the tandem rolling of two sets of such rolls 11a, 11b. The rolling mill is then run reverse to move the material 1 and the width center of the material is partially rolled down by tandem in conformity with the width center of W3, W4 in the bulging part of the other roll pair. The similar operation is repeated in the case of increasing the width.

Inventors

• 👤 Kenji Kataoka
• 👤 健二 片岡
• 👤 Takashi Kusaba
• 👤 隆 草場

Bibliographic Details