Method and apparatus for composite YAG laser/arc welding

Details Method and apparatus for composite YAG laser/arc welding Method and apparatus for composite YAG laser/arc welding

2006-03-07

2006-03-07

Kerns, Kevin P. (Department: 1725)

Electric heating

Metal heating

By arc

C219S075000, C219S121840, C219S13700R

Reexamination Certificate

active

07009139

ABSTRACT:
A combined YAG laser/arc welding apparatus performs a welding operation with a large depth of fusion and a deep fusion at a high efficiency. The welding apparatus includes an arc electrode which targets a point on a member being welded where a laser beam from a YAG laser is focused. While an arc power supply is connected between the arc electrode and the member being welded, the member being welded is irradiated by the YAG laser to produce plasmoid gasses and metal vapors or a plume which is effective to start an arc from the arc electrode. A combined YAG laser/arc welding operation takes place while keeping the plume within and without a keyhole. Welded surface is covered by a hood, and a shielded gas passed through a commutation metal network surrounds the welded focus to prevent an oxidation and keeps the plume maintained. A filler wire is fed to a molten pool.

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