US4873751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabrication or repair technique for integrally bladed rotor assembly
Assignee: RTX Corp
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Filing: 1988-12-27
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Granted: 1989-10-17
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Expires: 2008-12-27
Abstract
Abstract Techniques for fabricating or repairing integrally bladed rotors are developed. A new or replacement blade is bonded to a projecting stub. The new blade has a collar through which bonding forces are transmitted. After bonding with heat and pressure, final machining and heat treatment operations are performed.
Inventors
- 👤 Raymond M. Walker
- 👤 Donald P. Achor
- 👤 Robert W. Baumgarten
- 👤 Ralph B. Bogard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:35
CPC Classifications
B; B23; B23P; B23P6/00; B23P6/002; B23P6/005; B23P15/00; B23P15/006; F; F01; F01D; F01D25/00; F01D25/28; F01D25/285; F05; F05D; F05D2230/00; F05D2230/60; F05D2230/68; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49318; Y10T29/49718; Y10T29/49732; Y10T29/49734; Y10T29/49737
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A method for replacing a blade on an integrally bladed rotor, which comprises a disk having a plurality of integral blades projecting from the rim of the disk, including the steps of: (a) removing a preexisting blade, leaving a stub, a portion of said preexisting blade, projecting from the disk rim, said blade stub having a face which constitutes a surface to which a replacement blade will be bonded; (b) positioning a replacement blade adjacent to said stub, said replacement blade having a circumferential collar about its periphery adjacent the proposed bond with the adjacent surfaces of said stub and said replacement comprising an intended bond; (c) applying a force between said stub and said replacement blade, with said force being applied to the replacement blade through said collar; (d) locally heating said intended bond, between said stud and said replacement blade, to a temperature which causes softening, metal flow and bonding; (e) removing said collar from said replacement blade by machining.
Claim 2
Independent Claim
162 words
A method for replacing a blade on an integrally bladed rotor, which comprises a disk having a plurality of integral blades projecting from the rim of the disk, including the steps of: (a) removing a preexisting blade, leaving a stub, a portion of said preexisting blade, projecting from the disk rim, said blade stub having a face which constitutes a surface to which a replacement blade will be bonded; (b) positioning a replacement blade adjacent to said stub, said replacement blade having a circumferential collar about its periphery adjacent the proposed bond with the adjacent surfaces of said stub and said replacement comprising an intended bond; (c) applying a force between said stub and said replacement blade, with said force being applied to the replacement blade through said collar; (d) locally heating said intended bond, between said stud and said replacement blade, to a temperature which causes softening, metal flow and bonding; (e) removing said collar from said replacement blade by machining.
Claim 3
Independent Claim
142 words
A method for fabricating an integrally bladed rotor, which comprises a disk having a plurality of integral blades projecting from the rim of the disk, including the steps of: (a) providing a disk having a plurality of projecting stubs; (b) providing a plurality of blade preforms, each preform having a circumferential collar about its periphery and orienting said blade preform adjacent a stub; (c) applying a force between said stub and said blade preform, with said force being applied to the blade preform through said collar; (d) locally heating said intended bond, between said stub and said blade preform, to a temperature which causes softening, metal flow and bonding to cause bonding and then allowing the bond to cool; (e) removing said collar from the blade by machining; (f) repeating steps "c" "d"0 and "e" until all stubs have blades attached thereto.
Claim 4
Independent Claim
142 words
A method for fabricating an integrally bladed rotor, which comprises a disk having a plurality of integral blades projecting from the rim of the disk, including the steps of: (a) providing a disk having a plurality of projecting stubs; (b) providing a plurality of blade preforms, each preform having a circumferential collar about its periphery and orienting said blade preform adjacent a stub; (c) applying a force between said stub and said blade preform, with said force being applied to the blade preform through said collar; (d) locally heating said intended bond, between said stub and said blade preform, to a temperature which causes softening, metal flow and bonding to cause bonding and then allowing the bond to cool; (e) removing said collar from the blade by machining; (f) repeating steps "c" "d"0 and "e" until all stubs have blades attached thereto.
Claim 5
Dependent Claim
23 words
A method as in claim 2 wherein step "e" is performed to multiple blades after said multiple blades have been bonded to stubs.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |