US 5,284,406 A · Fixture and method for machining rotors

Abstract

The present invention provides a method and apparatus including 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. 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 and 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.

Claims3

Dependent claims

A fixture for machining a gas turbine rotor having rotor blade slots and a rim having a forward face, said fixture comprising:

a root removably insertable into the blade slots, said root shaped to conform to the rotor blade slot, said root further including a tang to butt up against the forward face of the rim, thereby axially fixing the position of the root;
a base attached to said root;
a machining guide connected to said base;
a C-shaped tool guide slot extending through said machining guide, said base and said root;
and
a means to removably mount said root to the rotor in a fixed position relative to the rotor.

3 more elements

Dependencies are inferred from the claim text.

Fixture and method for machining rotors

Life of this patent

Fixture and method for machining rotors

Life of this patent

Abstract

Claims3