To provide a method of rolling a hot-rolled steel strip by which surplus width is more reduced without performing the reconstruction of equipment of a sizing press and without confusing a hot rolling process in a hot rolling line on which the sizing press is installed.
Setting calculation to each slab 1 is performed by using the measured data of the slab width on the inlet side of a width press, which is obtained by an inlet-side slab width meter 3, the opening degree of the sizing press 4 is set on the basis of the amount of width pressing which is determined by the setting calculation and also, when the width pressing of the slab 1 of a material, the slab width on the outlet side of the width press is measured with an outlet-side slab width meter 7. The error of the amount of the width press by the equipment factor of the sizing press is determined on the basis of the measured data of the slab width on the outlet side of the width press and the opening degree of the sizing press 4 is corrected to the slabs 1 from and after the next material by the amount corresponding to the determined error of the amount of the width pressing.
NISHI KEIICHIRO
KIKAWADA TAKASHI
