To provide an indirect spot welding method capable of obtaining stably a suitable go stone-shaped nugget, irrespective of total thickness of layered metal sheets.
Three time zones t1, t2, t3 divided into three from the start of electrification are provided as to a pressurization force of an electrode and a current value of electrification, in the indirect spot welding method. Pressurization is executed by a pressurization force F1(N) expressed by F1 in a formula and the electrification is executed by a current value C1(kA) expressed by C1 in the formula, in the initial time zone t1, pressurization is executed by a pressurization force F2(N) expressed by F2 in the formula and the electrification is executed by a current value C2(kA) expressed by C2 in the formula, in the next time zone t2, and pressurization is executed by a pressurization force F3(N) expressed by F3 in the formula and the electrification is executed by a current value C3(kA) expressed by C3 in the formula, further in the next time zone t3, wherein T represents the total sheet thickness (mm) of the layered metal sheets.
IKEDA TOMOMASA
| JP2010194609A | 2010-09-09 |
Kiyoshi Kuruma
Keisuke Kawahara
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