Welding method and assembly therefor

Details Welding method and assembly therefor Welding method and assembly therefor

1999-06-03

2000-12-12

Look, Edward K.

Rotary kinetic fluid motors or pumps

With passage in blade, vane, shaft or rotary distributor...

416 96A, 416 97R, 416224, 2988901, F01D 514

Patent

active

061589551

ABSTRACT:
An assembly and method for welding an article, such as an air-cooled superalloy airfoil of a gas turbine engine nozzle. The method entails inserting a fixture into a cooling passage of the airfoil. The fixture is configured to close a first opening to the passage through which the fixture is inserted into the passage. The fixture is also configured to introduce a gas into the passage through a longitudinal row of ports. A through-wall crack in the airfoil is weld repaired while the gas flow is maintained to the cavity at a rate that sufficiently pressurizes the passage to prevent the molten filler material from entering the passage through the crack, while allowing the filler material to fill the crack.

REFERENCES:
patent: 4726104 (1988-02-01), Foster et al.
patent: 5584662 (1996-12-01), Mannava et al.
patent: 5846057 (1998-12-01), Ferrigno et al.

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