Patent ID: 9662738
Date: 2017-05-30
CPC Classifications: B23K

Claim:
1. A method of forming a resistance spot weld joint in a workpiece including a first steel substrate disposed in contact with a second steel substrate to define a faying interface therebetween, the method comprising: disposing the workpiece between a first welding electrode and a second welding electrode, wherein each of the first welding electrode and the second welding electrode includes; contacting the workpiece with the welding surface of each of the first welding electrode and the second welding electrode so as to define a first welding interface between the first steel substrate and the first welding electrode, and a second welding interface between the second steel substrate and the second welding electrode; inducing each of a first quantity of resistance heat over a first area of the first welding interface, a second quantity of resistance heat over a second area of the second welding interface, a third quantity of resistance heat over a third area of the faying interface, a fourth quantity of resistance heat within the first steel substrate, and a fifth quantity of resistance heat within the second steel substrate; wherein each of the third quantity of resistance heat, the fourth quantity of resistance heat, and the fifth quantity of resistance heat is less than either of the first quantity of resistance heat and the second quantity of resistance heat; and maximizing each of a first ratio of the first area to the third area, and a second ratio of the second area to the third area to thereby form the resistance spot weld joint in the workpiece.