Other

Nippon Kokan Kabushiki Kaisha

Nkk Corporation

Sadakazu Masuda

Kenichi Ide

Yasushi Dodo

Fumio Fujita

Shigeki Narushima

Masamoto Kamata

Shuichi Yamashina

Masaaki Yamamoto

Yasuhiro Fujii

Satoshi Murata

Nobuhiro Tazoe

Masahiko Yoshino

Toru Minote

Tadayoshi Murakami

Takumasa Terauchi

Ryuichi Yagi

Kazuyuki Sato

Yoshimichi Hino

Yoichi Motoyashiki

Shozo Ikemune

Hajime Ishii

Hiroshi Sekine

Hisatomo Eda

Toshihiko Obata

Takashi Yokoyama

Junichi Inagaki

Hisashi Honjou

Isao Imai

Toshio Iwanami

Yoshikazu Takada

Hisashi Sato

Shinji Okazaki

Masao Mikami

Takashi Ariizumi

Kinichi Higuchi

Takashi Nishii

Yuji Okami

Masaru Miyake

Shirou Osada

Shozo Azuma

Masahiko Yoshini

According to an apparatus and a method for manufacturing a hot-rolled steel plate, a roughing process for reducing a thickness of a continuously cast slab is performed to obtain a sheet bar, and a finishing rolling process for rolling the sheet bar is effected to produce a hot-rolled steel plate having a predetermined plate thickness. After cooling down, the hot-rolled steel plate is then wound. A pair of dies each of which has a tapered portion on an input side and a parallel portion on an output side are used in at least part of the roughing process. Further, before performing plate thickness pressing to a material in a plate thickness direction by using the dies , at least one of a front end and a rear end of the material is pressed in a widthwise direction to be pre-formed.

Device and method for manufacturing hot-rolled sheet steel and device and method for sheet thickness pressing used for the device and method

A material to be shaped is reduced and formed by bringing dies with convex forming surfaces, when viewed from the side of the transfer line of the material close to the transfer line from above and below the material in synchronism with each other, while giving the dies a swinging motion in such a manner that the portions of the forming surfaces of the dies, in contact with the material are transferred from the upstream to the downstream side in the direction of the transfer line.

Plate reduction press apparatus and methods

A high-quality hot rolled steel sheet is manufactured with a high production efficiency and a low cost, from a long, hot slab, using a combination of continuous casting facilities and a plate reduction press machine.

Apparatus and methods for manufacturing hot rolled steel sheets

The die changing apparatus for a plate reduction press machine, comprises an upper die support holder,and a lower die support holder,that are arranged vertically on opposite sides of a transfer line, and support holder guide rails,installed on the upper die support holder and extending substantially horizontally in the lateral direction of the transfer line, and an upper die,and a lower die,are mounted on the upper and lower die support holders, respectively using the rollers onto the dies, fixing devices,that fix the upper and lower dies on the upper and lower die support holders, respectively, die fastening members,which are placed on each side of the upper and lower dies, opposite each other in such a manner that they can be fastened to both dies, and a die changing mechanism that can move one of the die fastening members in a direction perpendicular to the transfer line.

Apparatus and method for changing dies

A method and hot rolling apparatus for producing a hot rolled steel sheet include a roughing rolling mill to roughing roll a heated slab into a sheet bar, at least one solenoid-type induction heater arranged for re-heating the sheet bar over its entire width, and a finish rolling mill arranged to finish roll the re-heated sheet bar into a hot rolled steel sheet having a predetermined thickness. An initial temperature before rolling is set to be low, and re-heating of the sheet bar is carried out around the middle of the hot rolling apparatus. The thermal energy required for rolling is thereby reduced as a whole without damaging the quality of the resulting hot rolled steel sheet. A descaling apparatus is provided prior to the finish rolling mill to remove oxide scales on surfaces of the sheet bar, whereby the resulting hot rolled steel sheet is free of scale flaws and exhibits superior surface properties.

Method for producing hot rolled steel sheet using induction heating and

Making method of hot-rolled steel sheet comprises rough rolling a slab into a rough bar, heating the rough bar, guiding the rough bar with side guides and finish rolling the rough bar. The apparatus comprises a rough rolling mill, a heating device for heating the rough bar, side guides for guiding the rough bar and a finish rolling mill.

Growing community of inventors

Tokyo, Japan

Sadakazu Masuda