| 摘要 |
PURPOSE:To shorten welding time and reduce energy consumption by making a hole smaller that the diameter of a nugget in a member to be welded and welding an airtight terminal by a laser spot greater than the diameter of the hole. CONSTITUTION:A hole 61 smaller than the diameter of a nugget is made in the weld zone of a member 6 to be welded made of metallic conductor, and placed to coincide with the weld zone of an airtight terminal 3. Laser beam 5 that has greater spot diameter than the diameter of the hole 61 made in the member 6 is condensed and irradiated aligning the center of the spot diameter and the center of the hole 61 of the member 6. A part of the center of the laser beam 5 is irradiated directly on the airtight terminal 3 through the hole 61 of the member 6, and other beam irradiates the outer periphery of the hole 61 made in the member 6. Consequently, irradiation of the laser beam 5 is concentrated on the molten zone 31 of the airtight terminal 3 and the molten zone 62 of the member 6 to be welded, and melt- welding is effected simultaneously. |
