Abstract
It is shown that in order to form the current pulse of a near rectangular shape, which provides conversion of the welding arc into a dynamic mode, it is rational to connect a forming element made on the basis of an artificial forming line in series to the welding DC circuit. The paper presents a diagram of a pulsed device for welding with a non-consumable electrode in argon which was developed using the forming element. The conversion of the arc into the dynamic mode is illustrated by the current and voltage oscillograms of the arc gap and the dynamic characteristic of the arc within the interval of one pulse generation time in the arc gap. The background current travels in the interpulse interval.
Highlights
Argon-arc welding with a non-consumable electrode provides a high weld quality when constructing metal structures for critical applications
When keys K1 - K1 are opened under total power supply voltage Urec and the voltage of charged capacitors Cc, the artificial forming line (AFL) is recharged as follows: rectifier Urec – key K1 – forming element (FE) – rapidly saturated choke (RSC) – key K1 – arc gap – rectifier
; Where U, Uc, Ud are voltages of power supply Urec, the AFL charge, and the arc gap, respectively; is the AFL impedance; Lc is the choke inductance of the AFL cell; Cc is the capacitance of the AFL cell capacitor
Summary
A Knyaz'kov, O Pustovykh, A Verevkin, V Terekhin, A Shachek, A Tyasto National Research Tomsk Polytechnic University, 30, Lenina ave., Tomsk, 634050, Russia 2 Seversk Technological Institute, Branch of State Autonomous Educational Institution of Higher Professional Education ‘National Research Nuclear University ‘MEPhl’, 65, Communistic ave., Seversk, 636036, Russia
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