CONTINUOUS HOT ROLLING METHOD AND ROLLED MATERIAL JOINING APPARATUS

WIPO Patent Application WO/1994/016838

A1

Rolled materials are joined effectively without causing qualitative defects to occur therein and without employing any large-scale expensive equipment, such as a swing roller during the transfer of the rolled materials, whereby a continuous hot rolling operation can be carried out. Continuous hot rolling method and apparatus for bringing the front end of a following rolled material into abutment with the rear end of a preceding rolled material and welding these abutting ends of each other by applying a laser beam or plasma thereto from above the upper surfaces of the materials while the materials are moved between a roughing mill and a finishing mill. According to the present invention, it becomes possible to weld rolled materials to each other from above the upper surfaces thereof efficiently in a short period of time without stopping the materials and without causing splashes and burrs to occur, and then continuously finish-roll these materials. Since a welder does not interfere with a rolled material transfer table, high-quality strips can be manufactured efficiently on economical equipment.

NISHIBAYASHI SHIGERU (JP)
OHARA MASAHIRO (JP)
MINAMIDA KATSUHIRO (JP)
YOSHIDA TADATSUGU (JP)
KOHNO ROKURO (JP)
SUGIHASHI ATSUSHI (JP)

PCT/JP1994/000127

August 04, 1994

January 28, 1994

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NIPPON STEEL CORP (JP)
NISHIBAYASHI SHIGERU (JP)
OHARA MASAHIRO (JP)
MINAMIDA KATSUHIRO (JP)
YOSHIDA TADATSUGU (JP)
KOHNO ROKURO (JP)
SUGIHASHI ATSUSHI (JP)

B21B15/00; B23K26/067; B23K26/08; B23K26/26; B21B1/26; (IPC1-7): B21B1/26; B21B15/00; B23K26/00

JPS5731489A	1982-02-19
JPS58134285U	1983-09-09
JPH0523707A	1993-02-02
JPS54139848A	1979-10-30

See also references of EP 0641614A4

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