| 摘要 |
Provided is an indirect spot welding device that can stably obtain a spot weld zone having satisfactory strength by precisely controlling pressure applied by a welding electrode in indirect spot welding, more specifically even when metal plates that have been laminated are pressed by a welding electrode only from one direction in order to weld locations in a state of being suspended without support on the side opposite thereto. In the indirect spot welding device, the range for the application of pressure by the welding electrode to the metal plates is set with a lower limit of 70 - 200 N and an upper limit of 800 - 2000 N for a stable region of applied pressure that can be controlled within a range of pressure application error of ±10%, and a pressure overshooting (OS) (%) = (PL − AL)/AL × 100 that occurs when the welding electrode is pressed against the metal plates is held to 10% or less. Here, PL is the peak value (N) for applied pressure in the overshooting region, and AL is the average value (N) for applied pressure when pressure is applied by the electrode. |
