Kawasaki Steel Corporation

Masanori Kitahama

Toshisada Takechi

Norio Takashima

Fujio Aoki

Kunio Isobe

Masanori Ebihara

Hideo Takekawa

Makoto Kobayashi

Hideyuki Nikaido

Hideo Abe

Toshiaki Amagasa

Kazuhito Kenmochi

Ikuo Yarita

Fumiya Yanagishima

Kuniaki Sato

Toru Sasaki

Akira Kishida

Takashi Ishikawa

Nobuaki Nomura

Akihiko Fukuhara

Tomio Komatu

Kunio Yoshida

Naoki Hatano

Hiroyuki Yoshimura

Yoshimitsu Fukui

Hiroshi Sekiya

Takashi Kawase

Nobuhiro Ito

A sheet crown control method and apparatus for use in endless rolling in which consecutively fed sheets are joined to each other to be continuously rolled through a rolling equipment line. The rolling equipment line includes a junction device for joining consecutively fed sheets to each other, a plurality of stands arranged in tandem on the downstream side of the junction device and having a roll bender load adjusting mechanism and a roll crossing mechanism. The roll cross angle of rolls incorporated in a stand of each rolling mill is set at a predetermined value beforehand if there is a roll cross angle that will enable a target sheet crown to be applied to each sheet and the roll bender load of each stand is adjusted on-line, thereby effecting sheet crown control. Rolling also may be performed while adjusting the roll cross angle of rolls incorporated in stands of each rolling mill on-line together with the roll bender load. The roll bender load and the roll cross load may be adjusted in a transition region where a junction between sheets exists or in a stationary region where sheets of the same material follow one after another.

Sheet crown control method and rolling equipment line for endless rolling

Method of joining steel sheet bars in hot rolling and a continuous hot

Continous hot rolling method and joining method of sheet bar

A method of continuously hot-rolling sheet bars in which a roughly rolled leading sheet bar and a trailing sheet bar are abutted prior to a hot finish rolling step. Plastic deformation of either or both of the cut rear and front end portions of the leading and trailing sheet bars is applied. End portions are brought into contact with each other due to metal flow, forming a gap portion between the sheet bars. The thickness of the sheet bar around the gap portion is enlarged in comparison to the thickness of the contact portions, and hot finish rolling fills the gap so that the bars are strongly joined over their width.

Method of continuously hot-rolling sheet bars

A process of producing cold rolled stainless steel strip, according to the invention, includes preliminary treatment for hot rolled stainless steel strip, in which preliminary treatment, hot rolled stainless steel strip is, at first, treated through annealing and picking process and is subsequently subject cold rolling without introducing rolling mill lubricant at a reduction of more than 5%. The process of preliminary treatment for preparation of cold rolling is useful for producing high surface brightness cold rolled stainless steel strip, which can achieve both of satisfactory quality and high efficiency.

Method and apparatus for preliminary treatment of stainless steel for

A rolling mill comprises a pair of crown work rolls each having, at both ends of a drum, tapered ends ground at different taper angles, respectively. The work rolls are located one above the other with one tapered end of one work roll being in opposition to one tapered end having a different taper angle of the other work roll. The work rolls are movable in axial directions, such that edges of the plates are rolled by one tapered end of one work roll and a drum of the other work roll, and between tapered ends of both the work rolls. The method and rolling mills are capable of controlling the crown and edge drop reduction and simultaneously preventing local protrusions such as high spots and edge built-up to produce flat rolled plates having no difference in thickness and further capable of controlling the crown and the edge drop according to the material, thickness and width of the plates.

Rolled plate sectional profile control rolling method and rolling mill

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Chiba, Japan

Masanori Kitahama