Kawasaki Steel Corporation

Other

Kawasaki Steel Corporation Et Al.

Norio Takashima

Toshisada Takechi

Hideyuki Nikaido

Toshiaki Amagasa

Kanji Hayashi

Akio Kuroda

Kazuo Morimoto

Yoshiki Mito

Shigeru Isoyama

Takeshi Hirabayashi

Nozomu Tamura

Hirosuke Yamada

Kazuya Tsurusaki

Ikuo Wakamoto

Kunio Miyamoto

Hiroyuki Nakano

Takahiro Yamasaki

Junzo Nitta

Masashi Osada

Shuji Amanuma

Hideo Sakamoto

Michio Hashimoto

Toshinobu Eguchi

Fumihiro Maeda

Masanori Kitahama

Fujio Aoki

Kunio Isobe

Masanori Ebihara

Hideo Takekawa

Hiroshi Yoshida

Hideo Abe

Hideki Watanabe

Kuniaki Sato

Toru Sasaki

Takashi Ishikawa

Michio Yamashita

Nobuaki Nomura

Tsuneo Nagamine

Kunio Yoshida

Naoki Hatano

Hiroyuki Yoshimura

Yoshimitsu Fukui

Shuji Watanabe

Hiroshi Sekiya

Takashi Kawase

Nobuhiro Ito

According to the invention, the rear end of a preceding metal piece and a front end of a succeeding metal piece are heated, pressed and joined prior to the finishing hot rolling. An alternating magnetic field running through the metal pieces in the thickness direction thereof is generated in an end region on opposed faces of the respective metal pieces to perform heating. Another alternating magnetic field whose direction is reverse with respect to that of the former alternating magnetic field is partially generated in the end region on the opposed faces of the metal pieces and in either a region where the metal pieces exist or a region outside width ends of the metal pieces. This assures a uniform heating of the end region on the opposed faces of the metal pieces over their full width to reliably join the both metal pieces to each other.

Method and apparatus for joining metal pieces using induction heating

A method and apparatus for joining metal pieces wherein the rear end of a preceding metal piece and a front end of a metal piece are heated and then pressed together prior to hot finished rolling. The temperature the ends of the metal pieces are heated to is a temperature range between the solidus and liquidus line temperatures of the metal(s) to be joined.

Method of joining metal pieces

Method and apparatus for joining metal pieces

Method and apparatus for joining metal pieces using induction heating. Metal pieces to be joined are placed end-to-end with a gap between them and induction heated in the thickness portion. To maximize speed and even heating edge-to-edge of the ends, members of a magnetic substance are provided in a gap between the inductor and the piece to be heated, thereby enhancing local heating effect by increasing magnetic flux density. Once heated, the ends are pressed together end-to-end for joining.

An apparatus for joining metal pieces using induction heating. Preceding and succeeding metal pieces are followed by a carriage which carries an inductor. The inductor has the ability to move in the longitudinal direction of the metal pieces relative to the carriage to allow the inductor to move more or less upon the preceding or succeeding metal pieces to increase or decrease the induction heating effect, thereby taking into account any thickness variation of the metal pieces and yet still heating them evenly with regard to each other, prior to their being pressed against each other for joining before hot finishing rolling.

Apparatus for joining metal pieces using induction heating

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

Method of levelling two-layered clad metal sheet

Growing community of inventors

Chiba, Japan

Norio Takashima