Sumitomo Metal Industries, Inc.

Yoshisuke Misaka

Motoo Asakawa

Yutaka Hirata

Yasutake Ohhashi

Tsutomu Takamoto

Toyohiko Okamoto

Takashi Shibahara

Teruo Kohno

Yoshiyuki Matoba

A process for controlling the molten metal level in continuous thin slab casting in which molten metal poured from a large-sized tundish into a small-sized tundish through a sliding nozzle is caused to overflow from the small-sized tundish for casting through a tiltable casting spout into a twin-belt-type continuous casting machine is disclosed. The process comprises measuring the level of molten metal on the casting machine to provide a deviation signal representative of a deviation of the level of the molten metal from a target value; and adjusting a directly influencing factor on the molten metal level, such as a pouring rate of the molten metal into the mold and a pulling speed of the molten metal according to the deviation signal. Preferably, the process further comprises measuring the directly influencing factor to provide a deviation signal representative of the directly influencing factor relative to the normal value, and adjusting the degree of opening of the sliding nozzle of the large-sized tundish according to the deviation signal to regulate the pouring rate into the small-sized tundish.

Process for controlling the molten metal level in continuous thin slab

Method of width control in hot strip mill

A continuous rolling mill including roll stands arranged in series, each of which has a pair of work rolls and roll chocks for supporting them respectively. One of the roll chocks is mounted on the frame of the roll stand to be movable in a direction parallel to the direction of path of the workpiece. A load sensing rod is provided to contact at its one end with the roll chock and to be thrusted through the roll chock by tensile or compression force occurring when the workpiece is being captured by the pair of rolls. The load sensing rod is hydraulically supported under a predetermined pressure so that the rod is shifted under an excessive load. The movement of the sensing rod is transduced to an electric signal representing the force for control of the mill.

Rolling mill

Growing community of inventors

Takarazuka, Japan

Yoshisuke Misaka