Research on Online Detection and Automatic Control of MAG Welding Parameters Based on Multisensor Technology

Welding parameters can affect the stability of the welding arc and the quality of weld formation. In order to improve welding quality, firstly, the online detection and automatic control system of MAG welding parameters and its working principle were studied. Secondly, the welding current and voltage online detection and automatic control method based on machine vision was studied, so that the welding current and voltage could be adjusted to the target value accurately and automatically. Thirdly, the wire feeding speed detection method based on proximity sensors was studied, which can detect the wire feeding speed online. Then, the method of online detection and accurate control of welding shielding gas flow rate based on adaptive models was studied. Finally, the influence of welding parameter detection and control method on the welding quality of the robot was tested, and the variation curves of synchronously collected welding current, welding voltage, wire feeding speed, and welding shielding gas flow rate were analyzed. The experimental results show that the main welding parameters of the whole welding process can be adjusted to the target values quickly and precisely by using the method studied in this paper, and the welding efficiency and quality can be improved.