Patent ID: 8253056
Filing Date: 2012-08-28
Classification: B23K

Abstract:
1. A method of resistance-welding a stacked assembly made up of at least three workpieces, including a thinnest workpiece of smallest thickness disposed on an outermost side of the stacked assembly, comprising the steps of: sandwiching the stacked assembly between a first welding electrode and a second welding electrode such that the first welding electrode is held in abutment against the thinnest workpiece, and holding a current branching electrode in abutment against the thinnest workpiece, the current branching electrode being of a polarity opposite to the first welding electrode; and passing an electric current between the first welding electrode and the second welding electrode in order to resistance-weld the stacked assembly, and passing a branched electric current from the first welding electrode to the current branching electrode or from the current branching electrode to the first welding electrode.