Kawasaki Steel Corporation

Other

Toshio Imazeki

Taichi Kukizaki

Kiyoshi Ueda

Hideyuki Nikaido

Toshisada Takechi

Hisashi Sato

Hiroaki Kuwano

Satoshi Shibuya

Itaru Hishinuma

Yasuo Ichii

Hideyuki Nikaidoh

Hiroshi Takase

Toshirou Matsushita

Nobuhiro Itoh

Soichiro Onda

Method and apparatus for coiling a metal strip

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 take-up equipment and a take-up method for a finish rolling mill for dividing a strip into a plurality of coiled products when taking up the strip on the exit side of the finish rolling mill are provided. A plurality of take-up machines (,K,, K,) are disposed at the downstream side of a hot finish rolling mill; a shearing machine (,) is provided on the upstream side of a pinch roll (,) of the take-up machines (,K,) at the uppermost stream end; and a strip passing device (,) is provided between the shearing machine and the pinch roll at the uppermost stream to prevent a strip from rising. The strip passing devices are guiding devices for restricting the height of the rise of the strip or the airflow suction type strip passing devices for drawing in a strip under suction using airflow. The plurality of take-up machines are down coilers or carousel type reels having two winding drums (,).

Hot rolled material take-up equipment and take-up method

In a rolling and cutting method for an endless hot-rolled steel strip comprising continuous hot rolling and joining rough-rolled slabs to each other with a joint having a boundary between slabs, subjecting the joined rough-rolled strip continuously to hot finish rolling to obtain an endless hot-rolled steel strip with a joint having a boundary between strips, cutting the endless hot-rolled steel strip immediately before coiling, and coiling each cut strip into a coil, the endless hot-rolled steel strip being cut such that the boundary between two successive slabs or sheets is positioned on the radially outermost face of the coil; the target cut point is set relative to the boundary by applying the tracking error of the boundary and the cutting control error for ensuring that the target cut point is accurately positioned on the radially outermost surface of the coil; the strip is kept from breaking at the boundary when coiled, and the coil as a final product can be produced with minimum scrap.

Method of rolling and cutting endless hot-rolled steel strip

Growing community of inventors

Chiba, Japan

Toshio Imazeki