Metal working – Method of mechanical manufacture – Impeller making
Patent
1991-12-09
1993-09-14
Cuda, Irene
Metal working
Method of mechanical manufacture
Impeller making
298897, 29463, B23P 1500
Patent
active
052437582
ABSTRACT:
A method for making a three-piece hollow airfoil includes preforming three metal sheets into initial shapes and sealing them together to form an in-process assembly. Internal cavities are formed in the assembly prior to sealing. The assembly is subjected to high temperature and pressure to diffusion bond the sheets together at selected points. The cavities are then subjected to internal pressure at high temperature in order to inflate and superplastically deform the assembly to the desired shape. Excess material may be machined off after inflation.
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Cheng Jung-Ho
LeMonds Jeffrey
Martini Gary T.
Patsfall Ralph E.
Wiggs Gene E.
Cuda Irene
General Electric Company
Scanlon Patrick R.
Webb II Paul R.
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