УПРАВЛІННЯ ПАРАМЕТРАМИ ІМПУЛЬСІВ СТРУМУ ПРИ ЗВАРЮВАННІ ПЛАВКИМ ЕЛЕКТРОДОМ АЛЮМІНІЄВИХ СПЛАВІВ

Abstract

Pulse-arc welding with a fusible electrode in inert gases occupies one of the leading places among arc methods in the manufacturing of structures from aluminum alloys of responsible purpose. Drops of molten metal of the electrode wire, with the correct selection of pulse parameters, have a small diameter, they do not deform, the evaporation from their surface is minimal and the transfer of alloying elements from the electrode wire to the welding bath is maximal. The problem of the influence of the pulses shape and their parameters on welds and connections during arc welding with a fusible electrode remains unstudied. Therefore, the research on improving the efficiency of pulse-arc welding through the creation of new equipment with enhanced capabilities of management of process parameters is relevant.The development of modern electric welding equipment, including the sources of power for the welding electrode arc, will allow increasing significantly the efficiency of the process. The peculiarity of the use of such equipment is explained by the emergence of many combined and hybrid welding technologies using a pulsed welding electrode arc, for example, laser-arc, plasma-arc. The purpose of the research is to expand the technological regimes of pulse-arc welding with a fusible electrode in inert gases of aluminum alloys by controlling the shape and parameters of the current pulses.Experimental studies on the control of current pulse parameters (duration, frequency, amplitude) and its shape during welding of aluminum alloys AMg6, 1201 and 2219 in argon have been conducted. The obtained dependencies can be used for the development of synergistic equipment for pulse-arc processes.Such equipment will allow expanding the ranges of adjustment of pulse parameters when welding a wide range of aluminum alloys of different alloying systems in different spatial positions and will allow using it in hybrid technologies.