Nippon Steel Corporation

Mitsubishi Jukogyo Kabushiki Kaisha

Yuji Uehori

Hiromi Matsumoto

Koe Nakajima

Shigeru Ogawa

Minoru Kawaharada

Tetsuo Kajihara

Tsuneo Nakano

Yoshikazu Izumihara

Norio Higuchi

Yuzuru Takahashi

Nobuo Kakehi

Hiroyasu Yamamoto

Method of hot rolling steel strip with deformed sections

A tandem rolling mill train for rolling metal plate or sheet includes a plurality of crossed-roll type rolling mill stands. The work rolls on at least two of the crossed-roll type rolling mill stands are respectively slanted in opposite directions so that the widthwise shear deformation developed on the upstream crossed-roll type stand is reduced by the widthwise shear deformation caused on the downstream crossed-roll type stand.

Tandem rolling mill train for metal plate and sheet

Three or more work rolls are arranged substantially in line with each other so that the adjoining work rolls each form a roll pass between them. The work rolls are driven in such a way that the rolls closer to the exit end of the rolling mill stand rotate with increasingly greater peripheral speeds. Metal strip is continuously passed through each roll pass and is wound around part of the periphery of the work rolls disposed between the work rolls at both ends of the stand. Thus, the strip is rolled between each pair of the adjoining work rolls. The work rolls are also driven in such a way that at least in one of the pairs of the work rolls, the peripheral speed of the higher-speed work roll is greater than the speed with which the strip leaves the roll pass formed by the pair of work rolls.

Method of rolling metal strip

A rolling mill includes at least one roll carrying a sleeve loosely on the barrel. The sleeve is inclined slightly by applying radially inward forces at two spaced positions along the outer peripheral surface of the sleeve to displace or to restrict displacement of the sleeve in the axial direction. The force applying points are independent of rotational direction of the sleeve, so that only one unit is needed even where there is reverse rotation. By controlling the relative value between the two forces, the mill can be given a powerful crown controlling capacity for workpieces of varying width, and the sleeve guiding unit is sufficiently durable to withstand high speed rolling during mass production.

Method of setting axial position of loosely carried sleeve in a rolling

Growing community of inventors

Kitakyushu, Japan

Yuji Uehori