Method of manufacturing a hollow blade for a turboshaft engine

Details Method of manufacturing a hollow blade for a turboshaft engine Method of manufacturing a hollow blade for a turboshaft engine

1993-01-04

1993-10-19

Cuda, Irene

Metal working

Method of mechanical manufacture

Impeller making

B23D 1500

Patent

active

052534197

ABSTRACT:
A hollow blade for a turboshaft engine, such as a fan rotor blade of large chord, is manufactured by a method in which primary components including two outer metal sheets and at least one intermediate sheet are hot formed so that the components are curved and twisted to a desired shape, diffusion barriers are formed at selected positions on the intermediate sheet, the shaped components are assembled and located on suitable process tooling, the assembled components are diffusion welded together, the welded assembly is internally pressurized by gas to inflate and superplastically deform selected areas to form a hollow in said assembly, and performing finishing operations on the hollow assembly to obtain the hollow blade.

REFERENCES:
patent: 4642863 (1987-02-01), Schulz
patent: 4882823 (1989-11-01), Weisert et al.
Sheet Metal Industries, vol. 66, No. 10, Oct. 1989, Redhill, Surrey, Great Britain; 507-8, 510-11 R. Pearce: Advanced Sheet Metal Technology for the Aerospace Industry.

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