Rolling laser welding method of railway vehicle structure, lap laser welding joint, railway vehicle structure

摘要

PPROBLEM TO BE SOLVED: To secure a sufficient joining strength by applying laser welding linearly on an overlapped portion of vertical and horizontal skeleton members in a short welding length area. PSOLUTION: Laser welding is applied on a plurality of plate members 1, 2, 11 overlapped in the short welding length area 23 of a railway vehicle body structure 41 so that the penetration reaches either through the thickness or within the thickness of an exterior plate 3. To achieve the objective, the laser beam LB is continuously irradiated while scanning along a spiral line for more than one rotation so as to perform laser weld 6 in a spiral form in the short welding length area 23. PCOPYRIGHT: (C)2009,JPO&INPIT