In the discourse, I summarized the characters and research results form home and abroad of aluminum alloy demo,and the introduction of TEMCOR joint is involved too.

Identification of multiclass defects in aluminum alloy resistance spot welding based on support vector machine;

Characteristic parameter extraction of voltage signal during aluminum alloy spot welding using fractal dimension;

Research on current and electrode force signal measure system based on LabVIEW during aluminum alloy spot welding;

Consequently, the technique of prolonging the electrode life of aluminum alloy spot welding is of reality significance.

This paper investigates energy distribution of air-borne acoustic signals in time-frequency domain during aluminum alloys spot welding in order to identify weld nugget states.