Abstract
The porosity defect in aluminum alloy welding is one of the common internal defects in the welding process. The traditional detection method is time-consuming and complex, the equipment requirements are high, and the existing pores are difficult to repair. The arc spectral signal contains a large amount of welding process information. It can be used as a signal for judging the internal porosity defects. The ultrasonic-assisted welding can effectively clean up the internal pores in the molten pool. By combining the two methods, it can realize online detection and feedback control of porosity defects in aluminum alloy welding. In this paper, the research status of pore detection and control methods is reviewed. The development prospect of spectral detection technology and ultrasonic-assisted welding and the advantages compared with the traditional methods are analyzed.
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