LASER WELDING METHOD

摘要

PURPOSE:To execute spot welding extremely easily by opening an under hole to a material to be welded by the first irradiation of laser and welding the materials to be welded by the second irradiation. CONSTITUTION:The 1st irradiation generates energy by a laser 5 and works an under hole 6. The diameter of the under hole is 60-70% the spot welding diameter and arrives slightly at a material 2 to be welded. A part of a material 1 to be welded and the material 2 are melted simultaneously by the 2nd irradiation of the laser 5, whereby a sound molten metal 3 is obtained and the material 1 is thoroughly welded to the material 2. Since the laser 5 is irradiated to the metal 3 at the same center as that of the hole 6, a sufficient joined area is obtained without deviation to one side.