Study on pulsed-arc welding issues at the machines and welding production automation department, RIAE - DSTU

Introduction. The history of solving the problem of welding structures made of stainless and heat-resistant metals and alloys goes back several decades. Researchers were particularly interested in working with deformed aluminum alloys 2-6 mm thick. As a rule, such thin-walled structures are welded in an argon shielding gas at relatively small currents; therefore, metal transfer is large-droplet (the weld is shaped in the form of separate large droplets with a narrow penetration of the welding components). At the same time, the weld is very convex, which does not meet the operational requirements of the structures. Thus, it was important to solve the following problems: to obtain a controlled fine-drop transfer of electrode metal at currents corresponding to a large-drop transfer; to determine a condition for the controlled transfer; to develop a power supply system for the welding arc.Materials and Methods. The behavior and parameters of the arc were recorded through the high-speed film and video shooting with synchronous oscillography of the electrical process parameters - current and voltage...