Kawasaki Steel Corporation

Ishikawajima-harima Heavy Industries Co., Ltd.

Kawasaki Steel Corportion

Katsumi Okada

Hideyuki Nikaido

Toshisada Takechi

Nobuhiro Tazoe

Hiroaki Kuwano

Takashi Ishikawa

Takao Yunde

Makoto Shitomi

Shinji Tanaka

Katsumi Kawakami

Tetsuo Shima

Takeshi Fujitsu

Takatoshi Amakawa

A guiding method and apparatus are presented for preventing the generation of lateral curving in a rolled slab produced in a roughing mill train, consisting of an edging mill and a horizontal mill in tandem, for example. The apparatus basically includes a first side guide placed upstream at the entrance to the edging mill, a second side guide placed downstream at the exit of the horizontal mill and a third side guide placed between the edging mill and the horizontal mill. The first side guide at the entrance to the edging mill synchronously closes the separation distance of the guide components upon the entry of the rolled slab into the first side guide, leaving a narrow space between the guide and the rolled slab. The third side guide closes the separation spacing based on slab exit timing representing the instant the tail end of the rolled slab passes through the edging mill. The second side guide assumes a narrow separation distance when the head end of the rolled slab enters therebetween. The restraining force provided by the narrow separation distance prevents lateral shifting to occur during the rolling process thereby reducing snaking of the rolled slab.

Guiding apparatus for roughing mill

In a corner reduction device for reducing side corners of a slab with corner rolls, a pair of upper and lower corner rolls are mounted inside a unitary unit frame, and a corner roll unit housing the unitary frame which is movable in the direction of width and vertical direction of the material is formed. Vertical position of the corner roll unit is controlled by a lifting power control cylinder through a push rod and position in direction of material width is controlled by a reduction cylinder. Driving of cylinder servo valves is controlled in accordance with position set values set by position setters, load set values set by load setters, and feedback signals from position sensors, thereby controlling the corner roll positions to fixed lateral and vertical positions. The driving of the servo valves is corrected according to values detected by cylinder pressure sensors, to evenly reduce the right and left corners of the material.

Corner reduction device equipped with corner rolls, control device

Growing community of inventors

Fujisawa, Japan

Katsumi Okada