Method and apparatus for repairing air-cooled airfoils
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B23H-009/14
B23H-005/00
B26F-003/00
출원번호
US-0250026
(2003-05-29)
발명자
/ 주소
Nimmons, Francis Edward
출원인 / 주소
General Electric Company
대리인 / 주소
Cusick Ernest
인용정보
피인용 횟수 :
9인용 특허 :
3
초록▼
Method and apparatus for repairing an article, such as an air-cooled component, during which at least a portion of the component must be removed and replaced. The method and apparatus make use of one or more workpiece holders adapted to secure and position an component on the apparatus, a multi-axis
Method and apparatus for repairing an article, such as an air-cooled component, during which at least a portion of the component must be removed and replaced. The method and apparatus make use of one or more workpiece holders adapted to secure and position an component on the apparatus, a multi-axis head adapted for movement relative to the workpiece holder, a nozzle mounted to the multi-axis head and operable to remove at least a portion of the component with a jet of fluid discharged therefrom, an electrical-discharge electrode mounted to the multi-axis head and operable to form surface holes in the component by electrical-discharge machining, and a system for controlling the movement of the multi-axis head so that the waterjet and electrical-discharge machining operations are performed to yield a repaired component that closely duplicates the original.
대표청구항▼
1. A method of repairing a component with surface holes, the method comprising the steps of:placing the component on an apparatus;operating a multi-axis head of the apparatus to remove at least a portion of the component by cutting the component with a jet of fluid discharged from a nozzle mounted t
1. A method of repairing a component with surface holes, the method comprising the steps of:placing the component on an apparatus;operating a multi-axis head of the apparatus to remove at least a portion of the component by cutting the component with a jet of fluid discharged from a nozzle mounted to the multi-axis head;removing the component from the apparatus; welding the component to form a replacement section that replaces the portion removed from the component; placing the component on a workpiece holder of the apparatus; and thenoperating the multi-axis head to form surface holes in the replacement section of the component by electrical-discharge machining the replacement section with an electrical-discharge electrode mounted to the multi-axis head. 2. The method according to claim 1, wherein the apparatus is a fluid jet cutting apparatus and the method comprises modifying the multi-axis head of the apparatus to carry the electrical-discharge electrode in addition to the nozzle. 3. The method according to claim 2, wherein the modifying step comprises securing an adapter plate to the multi-axis head and then mounting the electrical-discharge electrode to the adapter plate. 4. The method according to claim 2, wherein as a result of the modifying step the nozzle and the electrical-discharge electrode are supported on oppositely-disposed sides of the multi-axis head. 5. The method according to claim 1, wherein the step of operating the multi-axis head to form surface holes further comprises providing water as a dielectric medium between the replacement section and the electrical-discharge electrode. 6. The method according to claim 5, wherein the water is delivered to the component from a first tank positioned within a second tank containing the fluid for the nozzle. 7. The method according to claim 6, wherein the first tank is removable from the second tank and is absent from the second tank during cutting of the component with the jet of fluid discharged from the nozzle. 8. The method according to claim 1, wherein the component is a gas turbine airfoil component. 9. The method according to claim 8, wherein the surface holes formed in the replacement section of the component are trailing edge cooling holes. 10. A method of repairing an air-cooled airfoil component of a turbomachine, the method comprising the steps of: removing the component from the turbomachine;placing the component on a support of an apparatus; operating a multi-axis head of the apparatus to remove at least a trailing edge portion of the component by cutting the component with a jet of water discharged from a nozzlemounted to the multi-axis head;removing the component from the support;welding the component to form a replacement section that replaces the trailing edge portion removed from the component;placing the component on a workpiece holder of the apparatus; and thenoperating the multi-axis head to form trailing edge cooling holes in the replacement section of the component by electrical-discharge machining the replacement section with an electrical-discharge electrode mounted to the multi-axis head, the electrical-discharge machining being performed while water is present as a dielectric medium between the replacement section and the electrical-discharge electrode. 11. The method according to claim 10, wherein the apparatus is a waterjet cutting apparatus and the method comprises modifying the multi-axis head of the apparatus to carry the electrical-discharge electrode in addition to the nozzle. 12. The method according to claim 11, wherein the modifying step comprises securing an adapter plate to the multi-axis head and then mounting the electrical-discharge electrode to the adapter plate. 13. The method according to claim 12, wherein as a result of the modifying step the nozzle and the electrical-discharge electrode are supported on oppositely-disposed sides of the multi-axis head. 14. The method according to claim 10, wherein the water is deliver ed to the component from a first tank positioned within a second tank containing the water for the nozzle, the first tank is removable from the second tank, and the first tank is absent from the second tank during cutting of the component with the jet of water discharged from the nozzle. 15. The method according to claim 10, wherein the step of operating the multi-axis head to remove the trailing edge portion of the component comprises controlling the movement of the multi-axis head so as to precisely position and move the nozzle relative to surface contours of the component, and the step of operating the multi-axis head to form the trailing edge cooling holes comprises controlling the movement of the multi-axis head so as to precisely position and move the electrical-discharge electrode relative to surface contours of the component. 16. The method according to claim 15, wherein the controlling steps are both performed by operating a single pendant control in communication with the apparatus. 17. The method according to claim 15, wherein at least the step of controlling the movement of the multi-axis head during forming of the trailing edge cooling holes is performed in reference to stored data that identify the surface contours of the component. 18. An apparatus for repairing a component with surface holes, the apparatus comprising:means for supporting the component on the apparatus;a multi-axis head adapted for movement relative to the component while supported on the apparatus;a nozzle mounted to the multi-axis head and operable to remove at least a portion of the component with a jet of fluid discharged therefrom;an electrical-discharge electrode mounted to the multi-axis head and operable to form surface holes in the component by electrical-discharge machining; andmeans for controlling the movement of the multi-axis head, the controlling means being operable to position and move the nozzle relative to surface contours of the component when removing the portion of the component and to position and move the electrical-discharge electrode relative to surface contours of the component when forming the surface holes in the component. 19. The apparatus according to claim 18, wherein the apparatus is a fluid jet cutting apparatus and the multi-axis head is modified to carry the electrical-discharge electrode in addition to the nozzle. 20. The apparatus according to claim 19, further comprising an adapter plate secured to the multi-axis head and to which the electrical-discharge electrode is mounted. 21. The apparatus according to claim 18, wherein the nozzle and the electrical-discharge electrode are supported on oppositely-disposed sides of the multi-axis head. 22. The apparatus according to claim 18, further comprising:means for providing a dielectric medium between the component and the electrical-discharge electrode;a first tank from which the dielectric medium is delivered to the component; anda second tank containing the fluid for the nozzle and in which the first tank is positioned. 23. The method according to claim 22, wherein the first tank is configured to be removable from the second tank so as to be absent from the second tank when removing the portion of the component with the jet of fluid discharged from the nozzle. 24. An apparatus for repairing an air-cooled airfoil component of a turbomachine, the apparatus comprising:means for supporting the component on the apparatus;a multi-axis head adapted for movement relative to the component while supported on the apparatus;a nozzle mounted to the multi-axis head and operable to remove at least a trailing edge portion of the component with a jet of water discharged therefrom;an electrical-discharge electrode mounted to the multi-axis head and operable to form trailing edge cooling holes in the component by electrical-discharge machining;means for providing partially deionized water as a dielectric medium between the component and the electrical-discharge electrode while electrical-discharge machining is being performed; andmeans for controlling the movement of the multi-axis head, the controlling means being operable to position and move the nozzle relative to surface contours of the component when removing the trailing edge portion of the component and to precisely position and move the electrical-discharge electrode relative to surface contours of the component when forming the trailing edge cooling holes in the component. 25. The apparatus according to claim 24, wherein the apparatus is a waterjet cutting apparatus and the multi-axis head is modified to carry the electrical-discharge electrode in addition to the nozzle. 26. The apparatus according to claim 24, further comprising an adapter plate secured to the multi-axis head and to which the electrical-discharge electrode is mounted. 27. The apparatus according to claim 24, wherein the nozzle and the electrical-discharge electrode are supported on oppositely-disposed sides of the multi-axis head. 28. The apparatus according to claim 24, further comprising a first tank from which the partially deionized water is delivered to the component, and a second tank containing the water for the nozzle and in which the first tank is positioned, the first tank being configured to be removable from the second tank so as to be absent from the second tank when removing the trailing edge portion of the component with the jet of water discharged from the nozzle. 29. The apparatus according to claim 24, wherein the controlling means comprises a pendant control that is operable to control the movement of the multi-axis head when removing the trailing edge portion of the component and when forming the trailing edge cooling holes in the component. 30. The apparatus according to claim 24, further comprising means for storing data that identify the surface contours of the component.
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이 특허에 인용된 특허 (3)
Watkins James R. (Bristol GB2) El-Menshawy Mohamed F. (Birmingham GB2), Combined EDM and ultrasonic drilling.
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Georgieva, Petya M.; Bhide, Harshawardhan S.; Silvey, Thomas N.; Munshi, Mrinal; Vance, Steven J., Method of servicing an airfoil assembly for use in a gas turbine engine.
Morris, Mark C.; Schwarz, Klaus Helmut; Godfrey, Donald G.; Szuromi, Andy, Methods and systems for manufacturing components from articles formed by additive-manufacturing processes.
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