Controlling method of plate-width

Abstract

Abstract PURPOSE:To control the plate-width of a slab to be constant, by predicting the dog bone quantity due to an edge rolling, the width-restoring quantity due to a horizontal rolling and the width-fluctuation due to temperature against the width-fluctuation of the slab, and performing an over-compensation control. CONSTITUTION:From the plate-width adjusting efficiency and plasticity factor stored previously in a host computor 5, a proper value is set to a controlling device 2 according to a pass shedule. The initial setting of a roll gap of edging rolls 1 is performed according to the dimensions of a slab 8 and the desired size at the exit. Next, a rolling down force and a rolling down position are detected by a rolling-down force detector 3 and a position detector 4, and the deviation of plate-width and a commanding value of the roll gap are calculated by the device 2 to feed back them to a controlling system of the edging rolls 1 thereby adjusting the roll gap and performing a overcompensation control the slab 8. Further, the plate-width, after rolling by a horizontal mill 6, is measured by a plate-width gauge 7 to be sent to the host computor 5 thereby correcting and renewing respective tables.

Inventors

• 👤 Mitsuhiro Abe
• 👤 阿部　光博
• 👤 Katsuhiro Okura
• 👤 大倉　克寛
• 👤 Hiroaki Kojima
• 👤 小島　裕昭
• 👤 Ryuichi Osono
• 👤 大園　隆一
• 👤 Yasunobu Hayama
• 👤 葉山　安信

Bibliographic Details