| 摘要 |
PROBLEM TO BE SOLVED: To provide an indirect spot welding method capable of stably obtaining a go-stone shaped nugget formed in a molten state in indirect spot welding. SOLUTION: Welding time is divided into two time zones t1 and t2 in the indirect spot welding method. Pressing forces F1, F2 and current values C1, C2 are controlled in the time zones t1 and t2, respectively. In the first time zone t1, a metal plate is pressurized at the pressing force F1 shown by the formula 1 and is energized at the current value C1 shown by the formula 2. Then in the time zone t2, the metal plate is pressurized at the pressing force F2 shown the formula 3 and is energized at a current value C2 shown by the formula 4, wherein formula 1: 1.2F2≤F1≤5F2; formula 2: 0.25C2≤C1≤0.85C2; formula 3: 35T2.3≤F2≤170T1.9; and formula 4: 2T0.5≤C2≤5.5T0.9, where T is the total plate thickness (mm) of a superimposed metal plate. COPYRIGHT: (C)2012,JPO&INPIT |
