METHOD FOR RESISTANCE SPOT WELDING OF ALUMINUM ALLOY PLATE

摘要

PROBLEM TO BE SOLVED: To provide a method for resistance spot welding of an aluminum alloy plate by which the break and a blow hole weld defect of the aluminum alloy plate are decreased and a welding condition is simplified. SOLUTION: In the welding of the aluminum alloy plate with a resistance spot welding gun, the welding is completed under the condition that the aluminum alloy plate is pressurized under a prescribed pressure for a pressurizing time ST1 and the welding is performed in a welding time WT1 by supplying a welding current at the end of the pressurizing time ST1, and under the condition that a pressurizing is performed under a prescribed pressure at the end of the welding time WT1 and a forging pressurizing is performed by supplying a decay current for a decay time WT2 and the forging pressurizing is completed after keeping for a prescribed keeping time HT1 at the end of the decay time WT2.