Jfe Steel Corporation

Other

Nkk Corporation

Shozo Ikemune

Yoichi Motoyashiki

Akio Fujibayashi

Yoshimichi Hino

Sadanori Imada

Toru Minote

Yasuhiro Fujii

Nobuhiro Tazoe

Sadakazu Masuda

Kenichi Ide

Shigeki Narushima

Yasushi Dodo

Shuichi Yamashina

Kazuyuki Sato

Satoshi Murata

Isao Imai

Hisashi Sato

Hiroshi Sekine

Toshihiko Obata

A method for cooling a hot rolled steel strip including transferring a hot rolled steel strip while ejecting cooling water from a cooling means at a specified ejecting condition; pinching a top end of the hot rolled steel strip by a pinching roll, at the inlet of the cooling means and/or just behind the cooling means and/or at a position on the way of the cooling means; and releasing the hot rolled steel strip sequentially from a pinch roll arranged at an upstream side, concurrently with the arrival of a top end of the steel strip to a tension adding means arranged at a downstream side.

Method for cooling hot roller steel strip, and method for manufacturing hot rolled steel strip

An apparatus for cooling a hot rolled steel strip including a transfer means comprising transfer rolls to feed a steel strip which has been hot rolled by a finishing mill; a cooling means for cooling the steel strip; and accompanying rolls arranged with a clearance over the thickness of the steel strip at a position where the accompanying rolls face the transfer rolls through the steel strip to be transferred. The accompanying rolls rotate at nearly an equal peripheral speed as the transfer rolls or at a peripheral speed greater than the transfer speed of the steel strip.

Method and apparatus for cooling hot rolled steel strip, and method for manufacturing hot rolled steel strip

An apparatus for cooling a hot rolled steel strip comprising a transfer means arranged behind a final finishing mill, the transfer means comprising a plurality of transfer rolls for transferring the steel strip; at least one upper surface cooling means arranged at an upper surface side of the transfer means for cooling the steel strip by ejecting cooling water to an upper surface of the steel strip, the upper surface cooling means being capable of moving freely up and down and having a water breaking means at least at an outlet side of the cooling apparatus and at a position corresponding to the transfer rolls; and at least one lower surface cooling means arranged at a lower surface side of the transfer means relative to the upper surface cooling means and the steel strip to be transferred, for cooling the hot strip by ejecting cooling water at a lower surface of the steel strip.

A lower surface cooling box is arranged between transfer rolls on a runout table and an upper cooling box moving freely is arranged at a position corresponding to the cooling box to eject cooling water to the steel strip symmetrically in the vertical direction. The steel strip passes the center of converge of cooling water from upper and lower surfaces of the steel strip. A water breaking roll is provided elevating freely at least at the outlet side rotating at the same peripheral speed as the transfer rolls and is rotated to lower concurrently with passing of the steel strip top at the cooling apparatus. The upper cooling box is also lowered concurrently to cool the steel strip.

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

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

Growing community of inventors

Fukuyama, Japan

Shozo Ikemune