PURPOSE: To drastically improve the followup ability of a screw down device which is used for thickness control and to execute stable continuous rolling by restraining rapid fluctuation of interstand tension.
CONSTITUTION: At the time of joining by butting the rear end part of a preceding slab 1 and the tip part of the succeeding slab 2 on the inlet side of hot finish rolling equipment, before heating/pressing process for mutually joining each slab, about one of the preceding slab or the succeeding slab, the planar shape in the end part is formed into a symmetrical projecting shape or recessed shape by bordering the center in the width direction and the planar shape in the end part of the other slab is formed into the recessed shape or the projecting shape that is fitted to the projecting or recessed part.
MITSUYOSHI SADAYUKI
GOTO YOSHITO
HAYASHI KANJI
TSURUSAKI KAZUYA
MITSUBISHI HEAVY IND LTD