Kawasaki Steel Corporation

Other

Hitachi, Ltd.

Mitsubishi Jukogyo Kabushiki Kaisha Hiroshima Machinery Works

Kawasaki Steel Corporation Chiba Works

Mitsubishi Heavy Industries Limited

Mitsubishi Jukogyo Kabushiki Kaisha

Ishikawajima-harima Heavy Industries Co., Ltd.

Kawasaki Steel Corportion

Kawasaki Steel Corporation Et Al.

Hideyuki Nikaido

Takeshi Hirabayashi

Shigeru Isoyama

Toshiaki Amagasa

Kanji Hayashi

Hirosuke Yamada

Kunio Miyamoto

Akio Kuroda

Toshisada Takechi

Yoshiki Mito

Nozomu Tamura

Kazuo Morimoto

Kazuya Tsurusaki

Norio Takashima

Takahiro Yamasaki

Ikuo Wakamoto

Hiroyuki Nakano

Junzo Nitta

Masashi Osada

Shuji Amanuma

Hideo Sakamoto

Michio Hashimoto

Toshinobu Eguchi

Fumihiro Maeda

Kunio Isobe

Katsuhiro Takebayashi

Shigefumi Katsura

Atsushi Yuki

Kazunori Nagai

Mitsuo Nihei

Tetsuo Ichikizaki

Shozo Tashiro

Hiroaki Kuwano

Takayuki Naoi

Toshio Imae

Nobuaki Nomura

Motofumi Kuroda

Tadashi Nakagawa

Kiyoshi Izumi

Yoshikiyo Tamai

Mitsuhiro Takagi

Atsushi Komori

Nobuhiro Tazoe

Ikuo Yarita

Takaaki Hira

Hisashi Sato

Masanori Kitahama

Masuto Shimizu

Toshio Imazeki

Makoto Shitomi

Taichi Kukizaki

Kiyoshi Ueda

Yuichiro Watanabe

Yoshimitsu Fukui

Yoshito Goto

Katsumi Okada

Shinji Tanaka

Naoi Takayuki

Kozo Fujiwara

Shigeru Ueki

Kouzou Ishikawa

Toshihiro Hanada

Hiroshi Takase

Toshirou Matsushita

Yoshiaki Kaneda

Hideyuki Yuzawa

Katsumi Kawakami

Tetsuo Shima

Takeshi Fujitsu

Koichi Uemura

The present invention eliminates the need to stop the operation of a line even when trouble arises before, during, or after an operation of joining metal blocks in hot rolling. According to a specific solving means of the present invention, when a succeeding metal block is to be subjected to hot finish rolling in succession to a preceding metal block after the leading end of the succeeding metal block is joined to a tail end B of the preceding metal block on the inlet side of a finish rolling mill , it is determined before and after joining whether or not endless rolling is impossible. When it is impossible, joining is aborted, and the succeeding metal block is temporarily stopped, is fed again after the tail end B of the preceding metal block moves out of the finish rolling mill , and is finish-rolled under the conditions set for batch rolling. When joining was not performed successfully, a joint is cut between a joining unit and the finish rolling mill , and the rolled material is bitten by the finish rolling mill set for batch rolling.

Method of hot-rolling metal pieces

A continuous hot rolling mill with a metal block conveying apparatus and a metal block joining apparatus which moves with the metal blocks along the metal block conveying apparatus to conform a joining operation. The metal block conveying apparatus uses rollers supported by cylinders with a common hydraulic circuit which allows the cylinders to follow guide rails on the metal block joining apparatus and lower out of the path of the metal block joining apparatus and then return to a metal block support position after the metal block joining apparatus' passage without individual control circuits and valves for each of the cylinders.

Continuous hot rolling mill with metal block conveying apparatus

The invention comprises a continuous hot rolling method in which a rear end portion of a preceding metal block and a fore end portion of a succeeding metal block are cut and the metal blocks are joined to each other by heating and pressing followed by a finish rolling. A region of each metal block is restrained from a clamping position to the end portion thereof in order to prevent a change in level of the metal blocks in heating and pressing the piece. The end portions of the metal blocks can be thus prevented from deformation.

Defectively joined portion removal apparatus for use in a continuous hot rolling process

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.

In the present invention, in cutting the top and bottom surfaces of a hot-rolled sheet by the rotation of milling cutters holding the sheet therebetween in the thickness direction of the sheet in the running process of the hot-rolled sheet, the cutting resistance determined by the cutting conditions including the type of hot-rolled sheet, the temperature in cutting, and the cut depth is controlled by the adjustment of cut depth, and cutting is performed by making the tension produced on the hot-rolled sheet by the cutting resistance lower than the breaking strength of the joint portion to prevent the breakage of hot-rolled sheet.

Surface cutting apparatus for hot-rolled steel products

A take-up equipment and a take-up method for a finish rolling mill for dividing a strip into a plurality of coiled products when taking up the strip on the exit side of the finish rolling mill are provided. A plurality of take-up machines (,K,, K,) are disposed at the downstream side of a hot finish rolling mill; a shearing machine (,) is provided on the upstream side of a pinch roll (,) of the take-up machines (,K,) at the uppermost stream end; and a strip passing device (,) is provided between the shearing machine and the pinch roll at the uppermost stream to prevent a strip from rising. The strip passing devices are guiding devices for restricting the height of the rise of the strip or the airflow suction type strip passing devices for drawing in a strip under suction using airflow. The plurality of take-up machines are down coilers or carousel type reels having two winding drums (,).

Hot rolled material take-up equipment and take-up method

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

Continuous hot rolling method of metal blocks, as well as a metal block

The invention comprises a continuous hot rolling method in which a rear end portion of a preceding metal block and a fore end portion of a succeeding metal block are cut and the metal blocks are joined to each other by heng and pressing followed by a finish rolling. A region of each metal block is restrained from a clamping position to the end portion thereof in order to prevent a change in level of the metal blocks in heating and pressing the piece. The end portions of the metal blocks can be thus prevented from deformation.

A sheet bar joining apparatus comprises a heater provided between a delivery-side clamp for clamping a rear end of a preceding sheet bar and an entry-side clamp for clamping a front end of a succeeding sheet bar; upper and lower anti-buckling plates provided on the entry-side clamp and located above and below the sheet bars; upper comb tooth portions and lower comb tooth portions formed in the upper and lower anti-buckling plates, respectively; a heat resistant insulator provided at a surface of each comb tooth portion opposed to the sheet bars; and a plurality of groove portions provided near the surface of each comb tooth portion opposed to the sheet bars.

Induction heating apparatus for joining sheet bars

A post continuous hot rolling method where a rear end portion of a preced metal block and a fore end portion of a succeeding metal block are cut and the metal blocks joined to each other by heating and pressing followed by a finish rolling, wherein a poorly joined portion is removed by shaving the defective portion through application of rotating cutters prior to a final finish rolling of the joined blocks.

Method and apparatus for removing a defect in joined metal blocks

Growing community of inventors

Chiba, Japan

Hideyuki Nikaido