Title:
LASER WELDING METHOD FOR ALUMINUM ALLOY WITHOUT EXPOSING MOLTEN METAL ON THE REAR SURFACE
Document Type and Number:
Japanese Patent JPH0919778
Kind Code:
A
Abstract:
To obtain through laser welding a sound weld zone with blowhole defects suppressed.
In the laser welding of an aluminum alloy in which molten metal is unexposed in the rear surface in a weld zone, a weld bead is formed which has a penetration depth ratio (aspect ratio) of 0.9 or less against the bead width. In welding a material having a large thickness, an upper plate is used which is provided with a groove that enlarges a penetration depth. Residual foams are reduced by minimizing the aspect ratio to 0.9 or less, enabling a weld zone to be obtained with a satisfactory mechanical characteristics.
Inventors:
HOTTA MOTOJI
HINO HARUMICHI
OIKAWA HATSUHIKO
SAITO TORU
HINO HARUMICHI
OIKAWA HATSUHIKO
SAITO TORU
Application Number:
JP18805095A
Publication Date:
January 21, 1997
Filing Date:
July 02, 1995
Export Citation:
Assignee:
NIPPON LIGHT METAL CO
NIPPON STEEL CORP
NIPPON STEEL CORP
International Classes:
B23K33/00; B23K26/00; B23K26/14; B23K26/20; B23K26/32; B23K103/10; (IPC1-7): B23K26/00; B23K26/14; B23K33/00
Attorney, Agent or Firm:
Wataru Ogura