| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser arc hybrid welding method welding bonded surfaces of two long workpieces that are large-sized structures and capable of making uniform bond strength along a longitudinal direction while suppressing an increase in equipment cost.SOLUTION: Provided is a laser-arc hybrid welding method for confronting bonded surfaces 1a and 2a of two long steel members 1 and 2 that are large-sized structures and face against each other, and continuously welding together the bonded surfaces 1a, 2a in a longitudinal direction by means of laser welding and arc welding. During the arc welding, only portions of the bonded surfaces 1a and 2a in which arc is generated in a welding depth direction are welded together by an arc molten portion 32. During the laser welding, an emitted laser beam 22 is inclined from a reference axis K1 extending in the welding depth direction toward an orthogonal axis T1 of the bonded surfaces 1a and 2a, and only portions of the bonded surfaces 1a and 2a in the welding depth direction are welded together by a laser molten portion 23. |
