| 摘要 |
The purpose of the present invention is to obtain nuggets of appropriate diameter, without the occurrence of scatter. The present invention provides a resistance spot welding device for joining of prescribed welded materials, wherein the device is provided with: a storage unit for storing, as target values, time variation of the amount of instantaneous heat generation per unit of volume and the amount of cumulative heat generation per unit of volume observed during test welding that precedes welding proper; and a welding pressure controller that, in the event that the amount of time variation of the amount of instantaneous heat generation per unit of volume during welding diverges from a time variation curve stored as target values, compensates for the difference within the remaining energization time, and adjusts the welding pressure to the welded materials and to an adaptive controller that controls the current value of the voltage value during energization, in such a way that the amount of cumulative heat generation per unit of volume during welding proper matches the amount of cumulative heat generation per unit of volume stored as target values. |
