Method for machining rotors

Details Method for machining rotors Method for machining rotors

1990-11-14

1992-04-07

Cuda, Irene

Metal working

Method of mechanical manufacture

Impeller making

7988921, 409132, 409178, B23B 524

Patent

active

051015579

ABSTRACT:
A method of using a rotor mountable fixture for guiding a cutting tool powered by a hand held air motor to machine a gas turbine engine rotor without removing the rotor from its mountings in the engine is provided. In one particular embodiment the fixture includes a root having the same contour as a blade root slot of a rotor, a base having a platform attached to the root, and a machining guide in the form of a bushing restrained in a guide slot operable to receive a guide a hand held air motor powered cutting tool for machining the rotor. The present invention provides an accurate means to machine a gas turbine engine rotor without removing the rotor from its mounting. In one particular embodiment a method for machining the rotor in the field is provided using a hand held air motor to power a machining tool to cut a blade damper pocket in the dovetail slot of a pressure compressor rotor.

REFERENCES:
patent: 2390994 (1945-12-01), Vlug
patent: 3195412 (1965-07-01), Phillips
patent: 3289501 (1966-12-01), Dubrovin
patent: 4664609 (1987-05-01), Kaneda et al.
patent: 4770574 (1988-09-01), Lotz
patent: 4775270 (1988-10-01), Katayama et al.
patent: 4805282 (1989-02-01), Reaves et al.
patent: 4911043 (1990-03-01), Hoffman

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