Tušek: Factors Affecting Weld Shape in Welding with a Triple-wire Electrode

In fusion arc welding the final weld shape is influenced by welding parameters, mode of metal transfer, number of welding wires used and their arrangement in the contact tube, type of material to be welded, type of shielding medium and similar. In some articles, descriptions of investigations on the influence of the kind of material and the type of shielding medium used on the weld shape and size can be found [14]. Articles describing the influences of temperature gradient of surface tension, in which the arc is burning, and of electromagnetic forces on motion of the weld pool and the weld depth and shape can also be found [5-7]. M. Ushio supplies even a mathematical description of motion of the weld pool in TIG welding [8, 9]. Not even a single publication, however, has been found to report on influences of metal transfer and the number of wires in the contact tube on weld formation.