Method and apparatus for removing one or more vanes from a gas t

Details Method and apparatus for removing one or more vanes from a gas t Method and apparatus for removing one or more vanes from a gas t

1977-08-29

1979-02-27

Mehr, Milton S.

Metal working

Method of mechanical manufacture

Shaping mating parts for reassembly in different positions

291564R, 29252, 83188, B23P 1904, B23P 700

Patent

active

041411242

ABSTRACT:
Disclosed is an improved method and apparatus for removing damaged or worn vanes which are brazed or otherwise metallurgically attached between the concentric inner and outer shroud members of a gas turbine compressor stator. The method involves punching one of the attached vane ends in the radial direction relative to the concentric shroud members with sufficient force to shear the metallurgical joints holding the vane in the shroud slots. During punching, the shroud members are rigidly supported against deformation in the vicinity of the attached vane ends and the vane itself is supported laterally to prevent buckling thereof. With the invention, a stator can be repaired with no diminution in structural strength as compared to a new part. A punch and die assembly for use in removing a damaged vane is also disclosed.

REFERENCES:
patent: 3698273 (1972-10-01), Richard et al.
patent: 3802046 (1974-04-01), Wachtell et al.
patent: 3909157 (1975-09-01), Wachtell et al.

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