Metal working – Method of mechanical manufacture – Impeller making
Patent
1995-08-30
1997-06-10
Cuda, Irene
Metal working
Method of mechanical manufacture
Impeller making
298897, B23P 1500
Patent
active
056364407
ABSTRACT:
A process for manufacturing a hollow turbo-machine blade comprises the steps of:
(a) using computer aided design and manufacture (CAD/CAM) means to create, from a definition of the blade to be produced, a digital simulation of the flat form of the primary parts of said blade;
(b) die-forging said primary parts in a press observing certain conditions;
(c) machining said primary parts;
(d) depositing diffusion barriers on at least one of said primary parts according to a predefined pattern;
(e) assembling said primary parts, followed by diffusion welding them together under isostatic pressure;
(f) inflating the welded assembly and shaping it by superplastic forming; and,
(g) final machining;
the process possibly also including an additional step of cambering and twisting the primary parts either before or after they are welded together.
REFERENCES:
patent: 5063662 (1991-11-01), Porter et al.
patent: 5083371 (1992-01-01), Leibfried et al.
patent: 5099573 (1992-03-01), Krauss et al.
Bichon Matthieu
Douguet Charles J. P.
Lorieux Alain G. H.
Louesdon Yvon M. J.
Renou Florence A. N.
Cuda Irene
Societe Nationale d'Etude et de Construction de Moteurs d'Aviati
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