Engine duct and case construction

Details Engine duct and case construction Engine duct and case construction

1987-05-11

1989-01-31

Silverberg, Fred A.

Metal fusion bonding

Process

Plural joints

228194, 228195, 228152, 228161, B23K 3102

Patent

active

048010707

ABSTRACT:
A method of producing a reinforced duct structure for use with turbo-fan aircraft engines and the like. The duct is first cut from a flat metal sheet in a predetermined pattern. The sheet is rolled to form a tubular or conic structure of the approximate desired configuration and welded along the open seam. The welded tubular structure is then expanded to the exact required shape. The expanded tubular structure is cut out in selected areas to form a tubular grid structure. A tubular liner conforming to the inner surface of the tubular grid structure is installed and bonded to the grid structure forming an integral tubular structure of the desired configuration and strength and; attachment of any required mating flanges and structure bosses to the integral tubular structure.

REFERENCES:
patent: 3996019 (1976-12-01), Cogan
patent: 4245769 (1981-01-01), Meginnis
patent: 4429824 (1984-02-01), Woodward
patent: 4522859 (1985-06-01), Blair

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