Friction welding rotor blades to a rotor disk

Patent metadata

Field	Value
Publication number	US-9551230-B2
Application number	US-201514622344-A
Country	US
Kind code	B2
Filing date	Feb 13, 2015
Priority date	Feb 13, 2015
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

Systems and methods are provided related to manufacturing, repairing or otherwise providing an integrally bladed rotor. In one method, a set of preform rotor blades are arranged relative to a rotor disk. The preform rotor blades are concurrently bonded to the rotor disk.

First claim

What is claimed is:

1. A method for providing an integrally bladed rotor, comprising:
arranging a set of preform rotor blades relative to a rotor disk; and
concurrently welding the preform rotor blades to the rotor disk;
wherein the preform rotor blades are interconnected by at least one collar, and each of the preform rotor blades is integrally connected to the at least one collar.

2. The method of claim 1 , wherein the welding comprises linear friction welding.

3. The method of claim 1 , wherein a weld plane between preform rotor blades and the rotor disk is planar.

4. The method of claim 1 , wherein a weld plane between the preform rotor blades and the rotor disk is parti-cylindrical.

5. The method of claim 1 , wherein the at least one collar is a collar that is formed as a unitary, monolithic body with the preform rotor blades.

6. A method for providing an integrally bladed rotor, comprising:
arranging a set of preform rotor blades relative to a rotor disk; and
concurrently welding the preform rotor blades to the rotor disk;
wherein the preform rotor blades are interconnected by a collar; and
wherein the collar includes a plurality of collar segments, each of the collar segments is formed as a unitary body with a respective one of the preform rotor blades, and an adjacent pair of the collar segments are bonded together.

7. A method for providing an integrally bladed rotor, comprising:
arranging a set of preform rotor blades relative to a rotor disk; and
concurrently welding the preform rotor blades to the rotor disk;
wherein the preform rotor blades are interconnected by a collar; and
wherein the collar includes a plurality of collar segments, each of the collar segments is formed as a unitary body with a respective one of the preform rotor blades, and an adjacent pair of the collar segments are mechanically joined together.

8. The method of claim 1 , wherein the collar includes at least one gripping feature.

9. The method of claim 1 , wherein the at least one collar comprises a plurality of collars, each of the preform rotor blades is formed integral with a respective one of the collars, and the collars are interconnected by a fixture used to hold and move the preform rotor blades during the welding.

10. The method of claim 1 , wherein the rotor disk includes a set of preform rotor blade bases to which the preform rotor blades are respectively welded.

11. The method of claim 1 , wherein the welding comprises
holding the rotor disk stationary;
oscillating the preform in rotor blades along a weld plane; and
pressing the oscillating preform rotor blades against the stationary rotor disk.

12. The method of claim 1 , further comprising machining excess material from at least the welded preform rotor blades to respectively fowl a set of rotor blades.

13. The method of claim 12 , wherein the rotor blades comprise compressor blades for a turbine engine.

14. The method of claim 12 , wherein the rotor blades comprise turbine blades for a turbine engine.

15. The method of claim 12 , wherein the rotor blades comprise fan blades for a turbine engine.

16. A method for providing an integrally bladed rotor for a turbine engine, comprising:
arranging a set of preform rotor blades relative to a rotor disk, wherein the preform rotor blades are interconnected by at least one collar, and wherein the preform rotor blades are cast, forged and/or machined integral with the at least one collar;
concurrently bonding the preform rotor blades to the rotor disk; and
machining excess material from at least the bonded preform rotor blades to respectively form a set of blades for the turbine engine.

Assignees

• United Technologies Corp

Inventors

• Franklin Jordan J

Classifications

• F04D29/644

  especially adapted for elastic fluid pumps · CPC title

• F01D5/005

  Repairing methods or devices · CPC title

• F05D2240/30

  Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor · CPC title

• F01D5/34

  Rotor-blade aggregates of unitary construction {, e.g. formed of sheet laminae; (discs formed of sheet laminae F01D5/028; ceramic materials F01D5/284, composite materials F01D5/282)} · CPC title

• B23K20/129

  specially adapted for particular articles or work · CPC title