For the development of a classical method of mechanized arc welding with a self- regulation of the process of melting the electrode supplied to the welding zone at a constant speed, the following combination was proposed: on the one hand, a digital power source with automatic control and programming of volt-ampere characteristics VAC, which is a two-step one in our case: a – for increased arc length (with a low current), b – for shortened arc (with a high current); on the other hand, self-regulation of the melting process by the corresponding reaction of the power source. Moreover, the electrode melting occurs in a programmed oscillatory mode between the extreme values of the arc length: maximum and minimum. Such a combination is called a hybrid method of controlling the process of arc welding with a consumable electrode.
Some features of underwater mechanized and automatic wet welding with pulse feed of the electrode wire are considered. The conditions for experimental research to identify the parameters of forming of the weld metal at different parameters of pulse feed of the electrode wire are described. Regression equations describing the dependences of the size of the roll on the parameters of pulse feed and contour plots and response surfaces of the marked dependences are presented.
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