Do spot welding experiments to aluminum alloy plate in the same condition of simulation, prepare low magnification metallographic photos of joint, and measure nuggetdiameter and penetration rate.
In this paper, the curves of Dynamic Resistance CurveDRCare studied under the influence of shunt and distortion. The relationship between quasi steady resistance value and nuggetdiameter is found.
The evaluation factors included the diameter and diameter fluctuation of nugget, the depth of dent, and the appearance of nugget as well as the weighing of each factor was assigned.