METHOD OF LARGE-DIAMETER PIPES WELDING BY LASER AND HYBRID LASER-ARC WELDING Russian patent published in 2017 - IPC B23K26/348 B23K31/02 B23K101/06 

Abstract RU 2609609 C2

FIELD: technological processes.

SUBSTANCE: invention relates to large-diameter pipes welding method. Performing tack weld with welding torch with simultaneous monitoring over edges joint using scanning sensor located before welding torch. Immediately after tack weld welding performing application of notch onto it by laser beam or mechanical tool, which position is adjusted by means of said sensor. Performing root weld hybrid laser-arc welding by welding head, which position is adjusted relative to joint by said sensor guidance onto produced notch.

EFFECT: invention enables to avoid occurrence of inadmissible defects in form of penetrations and edges incomplete fusion in hybrid laser-arc welding welds, which can occur at laser beam deviation from welded joint.

1 cl, 1 dwg

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RU 2 609 609 C2

Authors

Romantsov Igor Aleksandrovich

Fedorov Mikhail Aleksandrovich

Kotlov Aleksandr Olegovich

Chernyaev Anton Aleksandrovich

Dates

2017-02-02Published

2015-06-30Filed