Underwater laser welding nozzle

Details Underwater laser welding nozzle Underwater laser welding nozzle

1997-08-22

2000-05-09

Evans, Geoffrey S.

Electric heating

Metal heating

By arc

21912163, B23K 2612, B23K 2614

Patent

active

06060686&

ABSTRACT:
A nozzle for delivering a laser beam to a workpiece under water includes a hollow plenum having an axially spaced apart inlet and outlet, with a gas port disposed therebetween. The laser beam is delivered through the inlet and outlet toward a localized melting zone on the workpiece. A pressurized cover gas is delivered into the gas port for discharge through the outlet to cover the melting zone. The outlet is sized to discharge the gas as a jet for opposing pressure of the water to locally exclude the water at the melting zone.

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White et al., "Underwater Cladding With Laser Beam and Plasma Arc Welding," Welding Journal, Jan. 1997, pp. 57-61.
Lumonics Corp., "JK MultiWave Laser," Jul. '92, 2-page brochure.
Translation of Japan Patent Application 7-299,574 PTO 99-4632, Aug. 1999.
"Development of Underwater Welding with high power YAG laser" by Kojima et al., Published in Ishikawajima--Harima Engineering Review (Jul. 1997), vol. 37, No. 4, p.303-308.
Translation of "Development of Underwater Welding with high power YAG Laser" by Kojima et al., Aug. 1998.

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