To provide a method of detecting the widening of a rolled stock in bar steel hot-rolling equipment, by which the widening of the rolled stock caused by separation of the rolled stock, which travels between rolling mills, from the kicker roller of a side looper device for a very short period of time in the bar steel hot-rolling equipment which includes the side looper devices between the rolling mills of a rolling mill train.
By continuously measuring the changing speed of loop height of a rolled stock loop between the rolling mills and detecting that the measured changing speed of the loop height exceeds the largest moving acceleration at which the kicker roller is movable, the occurrence of the widening of the rolled stock caused by the separation of the rolled stock from the kicker roller for a very short period of time is detected.
MORIMOTO SADAO
KUBOTA YOSHIHIKO
TAHIRA TOMOHIDE
DOI KIYOYOSHI
Seiji Kameoka
Hironori Takenaka
Toru Sakatani
Yoshiyuki Kaji
Makoto Suhara
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