Laser-plasma hybrid welding method

Details Laser-plasma hybrid welding method Laser-plasma hybrid welding method

2005-09-06

2005-09-06

Hoang, Tu (Department: 3742)

Electric heating

Metal heating

By arc

C219S680000, C219S121640

Reexamination Certificate

active

06940036

ABSTRACT:
In a process for laser-plasma hybrid welding, to weld work pieces, a laser beam and a plasma jet are brought together in the process region close to the work piece. A free microwave-induced plasma jet is generated by the following process. Microwaves are generated in a high-frequency microwave source, and the microwaves are guided in a hollow waveguide. A process gas is introduced into a microwave-transparent tube, which includes a gas inlet opening and a gas outlet opening, at a pressure p≧1 bar. The process gas is introduced into the microwave-transparent tube through the gas inlet opening in such a manner that it has a tangential flow component. A plasma is generated in the microwave-transparent tube by electrode-free ignition of the process gas, and a plasma jet is generated by introduction of the plasma into the working space through a metallic nozzle arranged at the gas outlet opening of the tube.

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Copy of previously submitted German Office Action dated Mar. 21, 2002 with English translation.

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