METHOD OF ALUMINIUM ALLOYS WELDING BY COMBINATION OF ARCS Russian patent published in 2020 - IPC B23K9/16 B23K9/09 

FIELD: technological processes.

SUBSTANCE: invention can be used in mechanized welding of aluminium alloys in an inert gas medium by a combination of direct and indirect action arcs. Arc of direct action on article is lit from non-consumable electrode, and arc of indirect action is between non-consumable and consumable electrodes. Melted electrode is continuously fed into arc of direct action and provides periodic pulsation of arc currents at equal frequency. Arcs are fed from two identical sources of heteropolar current pulses of rectangular shape. During current flow of direct-action arc of reverse polarity current of arc of indirect action is passed from negative melting electrode to non-consumable electrode. During direct current direct polarity current passage direct arc current is passed through indirect arc from positive melting electrode to non-consumable electrode. This ensures cathode destruction of oxide film on article and electrode wire.

EFFECT: method provides high stability of the build-up process and enables independent adjustment of the ratio of penetration of the base metal and melting of the electrode metal.

1 cl, 7 dwg, 5 tbl, 4 ex