Title:
METHOD OF MANUFACTURING ELECTRIC RESISTANCE WELDED TUBE EXCELLENT IN WELD ZONE CHARACTERISTIC
Document Type and Number:
Japanese Patent JP2007296538
Kind Code:
A
Abstract:
To provide a method of manufacturing an electric resistance welded tube excellent in weld zone characteristic by which the good quality of welding can be held by appropriately imparting tapered shapes to the end parts of a sheet (band material) before electric resistance welding when manufacturing the electric resistance welded tube.
A first grooved roll 3a for imparting the tapered shapes to the end parts on the side of the upper surface of the band material 20 and a second grooved roll 3b for imparting the tapered shapes to the end parts on the side of the back surface of the band material 20 are provided between a leveler 2 and a roll forming machine 5.
COPYRIGHT: (C)2008,JPO&INPIT
Inventors:
KENMOCHI KAZUHITO
YOKOYAMA HIROYASU
OKABE YOSHITOMO
KOIDE TATSUO
SAWAKI TETSUO
YOKOYAMA HIROYASU
OKABE YOSHITOMO
KOIDE TATSUO
SAWAKI TETSUO
Application Number:
JP2006124552A
Publication Date:
November 15, 2007
Filing Date:
April 28, 2006
Export Citation:
Assignee:
JFE STEEL KK
International Classes:
B21C37/08; B21C37/083; B21D19/00; B23K13/00; B23K101/06
Attorney, Agent or Firm:
Kenichiro Ochiai
Kazuhiro Mori
Kazuhiro Mori