To reduce the occurrence of defective welding by reducing a space between two overlapped members to be welded while maintaining an advantage that a work is welded only from one side thereof.
In a lap welding in which a work 2 and laser beams 1a are moved in a direction of a welding line 21 while the work 2 with overlapped members 2a and 2b formed of a magnetic material is irradiated with laser beams 1a, and a portion near the welding line 21 of the work 2 is pressed by a press roller 3 from the laser beams irradiation side (a face side), a magnet roller 6 is provided on the face side. The magnet roller 6 is fitted to a torch 1 so as to rotatively travel on the work 2 while attracting the member 2b on a back side toward the member 2a on the face side by the magnetic force in a vicinity of the welding line facing the press roller 3 across the welding line 21.
AWANO YOSHIRO
SANPEI KAZUHISA
SAEKI TAKAYUKI
KITAYAMA KOJI
WATANABE GORO
AZUMA HIROZUMI
TOYOTA CENTRAL RES & DEV
Toshio Nakamura
Miyazaki Yoshio
Kaoru Onozuka
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