Metal working – Method of mechanical manufacture – Impeller making
Patent
1994-06-30
1996-06-04
Cuda, Irene
Metal working
Method of mechanical manufacture
Impeller making
2940208, 2940213, B23P 1500
Patent
active
055221343
ABSTRACT:
A method for refurbishing or restoring a turbine vane or other airfoil to restore a desired flow area includes the steps of: providing a plate to be used to restore the flow area on the airfoil; cutting the plate into a desired shape; machining a series of tapers into the cut plate so that the cut plate has a single region with a substantially uniform thickness; overlaying a surface of the airfoil with the pre-cut, pre-shaped plate so that the substantially uniform thickness region is positioned over that part of the airfoil where the flow area is to be restored; and attaching the pre-cut, pre-shaped plate to the airfoil. The refurbishment or restoration method further includes heat treating the pre-cut, pre-shaped plate so that the plate softens and conforms to the shape of the airfoil surface.
REFERENCES:
patent: 4832252 (1989-05-01), Fraser
patent: 5033938 (1991-07-01), Fraser et al.
patent: 5156321 (1992-10-01), Liburdi et al.
patent: 5253978 (1993-10-01), Fraser
patent: 5351395 (1994-10-01), Crawmer et al.
Pawlaczyk Richard J.
Pietruska Norman
Rowe Jon G.
Wilcox Gilbert B.
Cuda Irene
Kelmachter Barry L.
United Technologies Corporation
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