| 2022 №03 (04) |
DOI of Article 10.37434/tpwj2022.03.05 |
2022 №03 (06) |
п»їThe Paton Welding Journal, 2022, #3, 41-44 pages
Experimental studies of bifilar electroslag welding with an equalizing wire
Yu.M. Lankin, O.P. Bondarenko, V.G. Tyukalov, V.G. Soloviov, I.Yu. Romanova
E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
Abstract
At bifilar electroslag welding, compared to the traditional two-electrode circuit, the path of current flowing in the slag pool is significantly different, and, consequently, the position of heat evolution zones and electromechanical forces acting on the molten slag and metal, changes drastically. Experiments showed that at bifilar electroslag welding penetration of the edges of welded item metal is considerably smaller, and reduction of the welding gap becomes possible that allows raising the welding speed at the same power, and power factor cos φ increases essentially from 0.67 to 0.9. Connection of equalizing wire between the midpoint of output winding of power transformer and the item being welded ensures stability of the electroslag welding process by the bifilar circuit of power source connection.
Keywords: electroslag welding, bifilar power circuit, edge penetration, process stability, power factor
Received: 10.12.2021
Accepted: 16.05.2022
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