To provide a lap laser welding method which can suppress welding cracks even when a workpiece composed of a plurality of overlapped sheets is lap-welded along its edge.
In the lap laser welding method for welding the lapped portion of the flange portions 1a, 1a of thin steel sheets (workpieces) 1, 1 by scanning a laser beam B along the edge (the end of the flanges) of the flanges, a welding torch 2 is arranged so as to tilt in order to radiate the laser beam B from the direction tilting by a required angle with respect to the axis P perpendicular to the surface of the workpiece 1, and the bead is tilted in the cross section perpendicular to the scanning direction of the laser beam. As a result, a tensional force to be applied on the bead can be relaxed, and the welding cracks to be caused in the bead can be suppressed.
FURUKAWA MASASHI
SETODOI MASARU
TAIYAMA MASANORI
UCHIHARA MASATO
SUMITOMO METAL IND
| JPH0839277A | 1996-02-13 | |||
| JP2003290951A | 2003-10-14 | |||
| JPH07108391A | 1995-04-25 |
Miyazaki Yoshio
Kaoru Onozuka
Akio Tagami
High Masahiro
Toshio Nakamura
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