FIELD: mechanical engineering and other industries; welding.
SUBSTANCE: invention relates to plasma-arc welding of aluminum alloys. According to proposed method, pilot arc is struck between cathode and nozzle-anode and dc reverse polarity main arc is struck between workpiece and nozzle-anode. Common anode spot is formed. Plasma-forming gas is fed through channel of nozzle-anode. Anode spot is located on inner edge of nozzle-anode channel by supplying currents at ratio of Ip/Im=0.4-3.2 to pilot and main arcs. Owing to such location of anode spot on inner edge of nozzle-anode, main arc features greater degree of constriction and penetration capacity.
EFFECT: improved plasma-arc welding process.
1 tbl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| WELDING OF LAPPING JOINTS OF DIFFERENT METALS | 2013 |
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| WELDING METHOD BY COMBINATION OF COMPRESSED AND FREE ARCS | 2021 |
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RU2410220C2 |
| METHOD OF PULSE ARC WELDING OF BUTT JOINTS OF ALUMINIUM ALLOYS WITH NON-MELTING ELECTRODE IN INERT GAS | 2007 |
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| NONCONSUMABLE ELECTRODE FOR ARC PROCESSES AND METHOD OF COOLING SAME | 0 |
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SU1496969A1 |
| METHOD OF GENERATING COMPRESSED A.C. ARC | 0 |
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SU772763A1 |
| METHOD OF PLASMA PROCESSING OF INCOMBUSTIBLE MATERIALS | 2009 |
|
RU2418662C1 |
| METHOD FOR ELECTRIC-ARC PLASMA WELDING OF METALS | 1995 |
|
RU2111098C1 |
| NON-CONSUMABLE ELECTRODE FOR ARC PROCESSES | 2003 |
|
RU2248868C1 |
