Welding processes often need to be controlled via external sensors to ensure the quality of the final products. During MIG/MAG welding, the welder or welding operators also rely on sound emissions during the welding process in order to determine the stability of the welding process. In the diploma thesis, we analysed short-circuit and pulsed MIG/MAG welding, and recorded technological parameters such as welding current and arc voltage, as well as sound emissions in the audible and ultrasonic range. During welding, we simulated non ideal welding conditions, such as the lack of a protective atmosphere of shielding gas, increasing the distance of the welding torch from the surface, greasy surface, the protective layer of paint and corrosion on the surface of the welding. We additionally analysed the sound with psychoacoustic parameters such as fluctuation strength and sound roughness. We found that in some cases we can use electrical quantities and in others acoustic and psychoacoustic quantities to determine the quality of the produced weld.
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