Metal working – Method of mechanical manufacture – Impeller making
Patent
1993-12-06
1995-11-28
Cuda, Irene
Metal working
Method of mechanical manufacture
Impeller making
29463, 298897, B23P 1500
Patent
active
054696186
ABSTRACT:
A method is provided for making a two-piece hollow airfoil having a complex geometry. Two metal sheets are formed into initial shapes so as to have a mean camber and twist. A series of raised ribs is machined onto the external side of each of the two sheets. The two sheets are joined together and sealed to form an in-process assembly. The assembly is subjected to high temperature and pressure to diffusion bond the sheets together at selected points. The assembly then subjected to internal pressure at high temperature in order to inflate and superplastically deform the assembly to the desired shape. Excess material is machined off after the inflation step.
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Kelley John R.
LeMonds Jeffrey
Martini Gary T.
McConnelee James E.
Wiggs Gene E.
Cuda Irene
General Electric Company
Scanlon Patrick R.
Webb II Paul R.
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