Method for starting a submerged arc welding process and welding apparatus

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10913127
APP PUB NO 20150273614A1
SERIAL NO

14440091

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Abstract

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A method comprising an arc ignition phase (IP), an arc-stabilizing phase (AP) and a stable arc phase (SP). The arc stabilizing phase comprises an initial sub-phase (IS) comprising the step of feeding at least one hot wire (4, 12) at constant feed speed and a main sub-phase (MS) comprising the steps of feeding said hot wire at constant feed speed and feeding at least one cold wire (22) at constant feed speed. The stable arc phase comprises the steps of continuously adjusting the feed speed of the hot wire and continuously adjusting the feed speed of the cold wire. The invention also relates to a welding apparatus (1) for carrying out the method. The welding apparatus comprises a hot wire feeding means (150), a contact means (2), a cold wire feeding means (35) and a control unit (31). The control unit is adapted to control said hot wire feeding means to feed the hot wire at a constant feed speed during the initial sub-phase, feed the hot wire at a constant feed speed during the main sub-phase and to continuously during the stable arc phase adjust the feed speed of the hot wire. The control unit is adapted to control said cold wire feeding means to feed the cold wire at a constant feed speed during the main sub-phase and continuously during the stable arc phase adjust the cold wire feed speed.

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Patent Owner(s)

Patent OwnerAddress
ESAB ABLINDHOLMSALLÉN 9 BOX 8004 GOTHENBURG 402 77

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Andersson, Martin Mariestad, SE 38 222
Johansson, Tomas Laxa, SE 14 91
Ljungkvist, Rikard Kumla, SE 4 8
Raudsepp, Hannes Solna, SE 12 23

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