Kawasaki Steel Corporation

Itaru Hishinuma

Toshio Imazeki

Taichi Kukizaki

Kiyoshi Ueda

Yasuo Ichii

Satoshi Shibuya

Akio Adachi

Ko Toyoshima

Hideyuki Nikaidoh

In order to prevent a preceding strip from being oversupplied on a delivery side of a coiling pinch rolls and to prevent a leading end of the following material from being over supplied on an entrance side of the coiling pinch rolls, to provide a strip coiling method in which a strip sent from a rolling mill is cut to a predetermined length by a strip shear (,), and a cut strip is coiled by a mandrel (,) of a coiler (,) via a coiling pinch rolls (,) disposed on a delivery side of a strip shear (,), characterized in that after a tail end of the strip coiled by the mandrel (,) via the coiling pinch rolls (,) is cut by the strip shear (,), a circumferential speed of the coiling pinch rolls (,) is higher than a transfer speed of the following material immediately after the cutting operation and lower than a coiling speed of the strip coiled by the mandrel (,).

Strip coiling method

A hot rolling method using a hot finishing mill including a pair of work rolls each having a taper ground end at one end of its barrel and arranged one above the other with the taper ground ends being on opposite sides so as to locate both edges of a plate-like material to be rolled in respective zones of the taper ground ends. Work rolls are cyclically shifted in their axial direction within a range so as not to permit the both edges of the material to come out of the taper ground ends of the work rolls, thereby preventing edge built-ups of the material and simultaneously effecting crown-controlling of the rolled material. The work rolls are finely shifted and simultaneously a bending action is applied to the work rolls in a manner to eliminate a bending action acting upon the work rolls caused by the material being rolled by the work rolls. The work rolls are cyclically shifted, while a distance from an edge of the material to a starting point of the taper ground end of the work roll nearest to the edge of the material is variably set so as to decrease dependently upon increase of thermal expansion of the work rolls. Stepwise variation in shifting distance of the work rolls per unit number of rolled material is varied in a rolling cycle.

Hot rolling method

Growing community of inventors

Chiba, Japan

Itaru Hishinuma