The evaluation factors included the diameter and diameter fluctuation ofnugget, the depth of dent, and the appearance of nugget as well as the weighing of each factor was assigned.
取焊点直径、焊点直径波动、压痕深度及焊点外观为评判因素集，并制定了各因素的权重分配集。
2
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.
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.