US20150231690A1 - Method for producing a turbine rotor - Google Patents
Method for producing a turbine rotor Download PDFInfo
- Publication number
- US20150231690A1 US20150231690A1 US14/181,878 US201414181878A US2015231690A1 US 20150231690 A1 US20150231690 A1 US 20150231690A1 US 201414181878 A US201414181878 A US 201414181878A US 2015231690 A1 US2015231690 A1 US 2015231690A1
- Authority
- US
- United States
- Prior art keywords
- rotor
- existing
- intended
- steam turbine
- machined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K3/00—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
- F01D5/063—Welded rotors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/006—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
- B23P6/002—Repairing turbine components, e.g. moving or stationary blades, rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/005—Repairing methods or devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/026—Shaft to shaft connections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/001—Turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/31—Application in turbines in steam turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/10—Manufacture by removing material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
- F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/30—Manufacture with deposition of material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49316—Impeller making
- Y10T29/4932—Turbomachine making
- Y10T29/49321—Assembling individual fluid flow interacting members, e.g., blades, vanes, buckets, on rotary support member
Definitions
- the claimed invention refers to a method for producing a turbine rotor, in particular a steam turbine rotor.
- Steam turbine rotors are large components manufactured from forged steel ingots.
- the size and mechanical properties required of the forging for satisfactory operation require specialized processing that only a few vendors in the world can provide.
- In order to obtain a new forging from one of the suppliers often takes in excess of a year or more. Accordingly the production of a new turbine rotor is very costly not only in financial terms but also in terms of time.
- the damaged rotor may be replaced by a spare rotor. Due to the fact, that the waiting period for a forging necessary to produce a new rotor is very long, as already mentioned above, customers often store a spare rotor in order to ensure that they can resume power generation as quickly as possible in case of an unrepairable rotor. However, the stocking of a new replacement rotor is accompanied by large expense.
- a method for producing a turbine rotor, in particular a steam turbine rotor comprising the steps of:
- a new rotor is produced on the basis of at least one existing rotor, which may be provided in form of a salvaged or spare rotor having predominantly larger dimensions as the dimensions of the intended rotor to be produced.
- the intended rotor is fitted in the at least one existing rotor by means of a comparison of the form of the at least one existing rotor with the form of the intended rotor in order to choose a favorable position of the intended rotor within said at least one existing rotor, wherein the fitting may be supported by a corresponding computer program.
- the choice of the position of the intended rotor within said at least one existing rotor in step b) is made taking into consideration production-orientated aspects, in particular the amount of material to be applied in step c) and/or the amount of material to be machined in step d).
- the machining in step d) is performed by means of turning and/or milling and/or grinding.
- At least two forged and machined existing steam turbine rotors are provided and joined to each other in step a), in particular by means of welding. Accordingly, the new rotor is produced on the basis of two existing rotors, which may be provided in the form of salvaged or spare rotors.
- one or both of said at least two forged and machined existing steam turbine rotors are shortened prior to their joining in order to create a favorable basis for the production of the new rotor.
- the drawing schematically shows a steam turbine rotor 1 , which is intended to be produced by the claimed method, and an existing steam turbine rotor 2 having predominantly larger dimensions as the dimensions of the intended rotor 1 .
- the existing steam turbine rotor 2 is provided.
- the existing rotor 2 may be a salvaged or a spare rotor being in stock.
- the existing rotor 2 may also be assembled of two or more existing steam turbine rotors, which are joined to each other in order to form the existing rotor 2 , e.g. by means of welding, wherein the existing steam turbine rotors may be shortened prior to their joining
- a second step b) the form of the existing rotor 2 is compared with the form of the intended rotor 1 and a position of the intended rotor 1 is chosen within the existing rotor 2 taking into consideration production-oriented aspects, in particular the amount of material to be applied in step c) and/or the amount of material to be machined in step d).
- the comparison of the forms of the existing rotor 2 and the intended rotor 1 as well as the choice of the position of the intended rotor 1 within the existing rotor 2 may be supported by a suitable computer program, by means of which the intended rotor 1 can be fitted in the existing rotor 2 as indicated in the figure.
- the intended rotor 1 is produced at the chosen position by machining the existing rotor 2 , in particular by means of turning and/or milling and/or grinding.
- One main advantage of the method is that it is superior to purchasing a new forging from both a cost and schedule perspective. It is also preferable to performing large-scale weld repairs where a significant percentage of the forging would have to be restored.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Forging (AREA)
Abstract
Description
- The claimed invention refers to a method for producing a turbine rotor, in particular a steam turbine rotor.
- Steam turbine rotors are large components manufactured from forged steel ingots. The size and mechanical properties required of the forging for satisfactory operation require specialized processing that only a few vendors in the world can provide. In order to obtain a new forging from one of the suppliers often takes in excess of a year or more. Accordingly the production of a new turbine rotor is very costly not only in financial terms but also in terms of time.
- Steam turbine rotors wear out during their operation. Accordingly, it is necessary to repair worn steam turbine rotors and to return them to service. Rotors can be repaired mechanically. Such mechanical repairs include machining away damaged areas, modifying integral rotors to include separate components, or stress relieving to remove excessive hardness or distortion. In addition, rotors can be repaired by means of build-up welding and subsequent machining Build-up welding introduces the ability to restore a rotor to its original configuration with little to no detriment to performance or reliability. However, rotor welding can be a slow and expensive process, which can make large repairs difficult financially.
- If a repair of a steam turbine rotor is not profitable due to excessive damages, the damaged rotor may be replaced by a spare rotor. Due to the fact, that the waiting period for a forging necessary to produce a new rotor is very long, as already mentioned above, customers often store a spare rotor in order to ensure that they can resume power generation as quickly as possible in case of an unrepairable rotor. However, the stocking of a new replacement rotor is accompanied by large expense.
- It is an object to provide an alternative method for producing a turbine rotor of the above-mentioned kind, which is favorable in terms of time and expense.
- In order to solve this object, a method for producing a turbine rotor, in particular a steam turbine rotor is provided, said method comprising the steps of:
- a) Providing at least one forged and machined existing steam turbine rotor having partially larger dimensions as the dimensions of the intended rotor to be produced;
- b) Comparing the form of said at least one existing rotor with the form of the intended rotor and choosing a position of the intended rotor within said at least one existing rotor;
- c) Applying material by means of build-up welding on portions of said at least one existing rotor, where not enough material is present for machining the intended rotor at the chosen position; and
- d) Producing the intended rotor at the chosen position by machining the existing rotor.
- Thus, according to the method of the claimed invention a new rotor is produced on the basis of at least one existing rotor, which may be provided in form of a salvaged or spare rotor having predominantly larger dimensions as the dimensions of the intended rotor to be produced. The intended rotor is fitted in the at least one existing rotor by means of a comparison of the form of the at least one existing rotor with the form of the intended rotor in order to choose a favorable position of the intended rotor within said at least one existing rotor, wherein the fitting may be supported by a corresponding computer program. At positions, where not enough material is present for producing the intended rotor at the chosen position by means of machining, additional material is applied by means of build-up welding on the respective portions of the at least one existing rotor. Subsequently, the intended rotor is produced at the chosen position by machining the existing rotor.
- Preferably, the choice of the position of the intended rotor within said at least one existing rotor in step b) is made taking into consideration production-orientated aspects, in particular the amount of material to be applied in step c) and/or the amount of material to be machined in step d).
- For example, the machining in step d) is performed by means of turning and/or milling and/or grinding.
- According to one embodiment, at least two forged and machined existing steam turbine rotors are provided and joined to each other in step a), in particular by means of welding. Accordingly, the new rotor is produced on the basis of two existing rotors, which may be provided in the form of salvaged or spare rotors.
- According to another embodiment, one or both of said at least two forged and machined existing steam turbine rotors are shortened prior to their joining in order to create a favorable basis for the production of the new rotor.
- Further features and aspects of the claimed invention become apparent by means of the following description of a method for producing a turbine rotor with reference to the accompanying drawing.
- The drawing schematically shows a
steam turbine rotor 1, which is intended to be produced by the claimed method, and an existingsteam turbine rotor 2 having predominantly larger dimensions as the dimensions of the intendedrotor 1. - In a first step a) of the method, the existing
steam turbine rotor 2 is provided. The existingrotor 2 may be a salvaged or a spare rotor being in stock. According to an alternative embodiment of the method, the existingrotor 2 may also be assembled of two or more existing steam turbine rotors, which are joined to each other in order to form the existingrotor 2, e.g. by means of welding, wherein the existing steam turbine rotors may be shortened prior to their joining - In a second step b) the form of the existing
rotor 2 is compared with the form of the intendedrotor 1 and a position of the intendedrotor 1 is chosen within the existingrotor 2 taking into consideration production-oriented aspects, in particular the amount of material to be applied in step c) and/or the amount of material to be machined in step d). The comparison of the forms of the existingrotor 2 and the intendedrotor 1 as well as the choice of the position of the intendedrotor 1 within the existingrotor 2 may be supported by a suitable computer program, by means of which the intendedrotor 1 can be fitted in the existingrotor 2 as indicated in the figure. - At portions A and B, where not enough material is present for machining the intended
rotor 1 at the chosen position, it is necessary to augment the dimensions of the existingrotor 2 with a corresponding amount of weld material in an additional step c) by means of a build-up welding. - In a further step d) the intended
rotor 1 is produced at the chosen position by machining the existingrotor 2, in particular by means of turning and/or milling and/or grinding. - One main advantage of the method is that it is superior to purchasing a new forging from both a cost and schedule perspective. It is also preferable to performing large-scale weld repairs where a significant percentage of the forging would have to be restored.
- While specific embodiments have been described in detail, those with ordinary skill in the art will appreciate that various modifications and alternative to those details could be developed in light of the overall teachings of the disclosure. For example, elements described in association with different embodiments may be combined. Accordingly, the particular arrangements disclosed are meant to be illustrative only and should not be construed as limiting the scope of the claims or disclosure, which are to be given the full breadth of the appended claims, and any and all equivalents thereof It should be noted that the term “comprising” does not exclude other elements or steps and the use of articles “a” or “an” does not exclude a plurality.
Claims (7)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/181,878 US20150231690A1 (en) | 2014-02-17 | 2014-02-17 | Method for producing a turbine rotor |
EP15700388.0A EP3071365A1 (en) | 2014-02-17 | 2015-01-15 | Method for producing a turbine rotor |
PCT/EP2015/050624 WO2015121016A1 (en) | 2014-02-17 | 2015-01-15 | Method for producing a turbine rotor |
RU2016133502A RU2016133502A (en) | 2014-02-17 | 2015-01-15 | METHOD FOR PRODUCING A TURBINE ROTOR |
US15/358,101 US20170074105A1 (en) | 2014-02-17 | 2016-11-21 | Method for producing a turbine rotor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/181,878 US20150231690A1 (en) | 2014-02-17 | 2014-02-17 | Method for producing a turbine rotor |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/358,101 Continuation US20170074105A1 (en) | 2014-02-17 | 2016-11-21 | Method for producing a turbine rotor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150231690A1 true US20150231690A1 (en) | 2015-08-20 |
Family
ID=52350123
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/181,878 Abandoned US20150231690A1 (en) | 2014-02-17 | 2014-02-17 | Method for producing a turbine rotor |
US15/358,101 Abandoned US20170074105A1 (en) | 2014-02-17 | 2016-11-21 | Method for producing a turbine rotor |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/358,101 Abandoned US20170074105A1 (en) | 2014-02-17 | 2016-11-21 | Method for producing a turbine rotor |
Country Status (4)
Country | Link |
---|---|
US (2) | US20150231690A1 (en) |
EP (1) | EP3071365A1 (en) |
RU (1) | RU2016133502A (en) |
WO (1) | WO2015121016A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019154957A1 (en) * | 2018-02-09 | 2019-08-15 | Otto Fuchs - Kommanditgesellschaft | Method for producing a structural component from a high-strength alloy material |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3521664A1 (en) * | 1985-06-18 | 1986-12-18 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | METHOD FOR FASTENING BLADES ON THE CIRCUMFERENCE OF THE ROTOR BODY OF A STEAM TURBINE |
US4893388A (en) * | 1988-12-08 | 1990-01-16 | Westinghouse Electric Corp. | Method of modifying turbine rotor discs |
US5172475A (en) * | 1991-12-02 | 1992-12-22 | Westinghouse Electric Corp. | Method for repairing a rotor |
US6749518B2 (en) * | 2002-04-08 | 2004-06-15 | General Electric Company | Inertia welded shaft and method therefor |
US20080011812A1 (en) * | 2005-11-04 | 2008-01-17 | General Electric Company | Integral backing ring for stub shaft weld repairs of rotating equipment and related method |
US7507933B2 (en) * | 2005-11-23 | 2009-03-24 | General Electric Company | Method for fabricating a rotor shaft |
US8961144B2 (en) * | 2011-06-30 | 2015-02-24 | General Electric Company | Turbine disk preform, welded turbine rotor made therewith and methods of making the same |
-
2014
- 2014-02-17 US US14/181,878 patent/US20150231690A1/en not_active Abandoned
-
2015
- 2015-01-15 WO PCT/EP2015/050624 patent/WO2015121016A1/en active Application Filing
- 2015-01-15 RU RU2016133502A patent/RU2016133502A/en unknown
- 2015-01-15 EP EP15700388.0A patent/EP3071365A1/en not_active Withdrawn
-
2016
- 2016-11-21 US US15/358,101 patent/US20170074105A1/en not_active Abandoned
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019154957A1 (en) * | 2018-02-09 | 2019-08-15 | Otto Fuchs - Kommanditgesellschaft | Method for producing a structural component from a high-strength alloy material |
EP3658328B1 (en) | 2018-02-09 | 2020-12-30 | Otto Fuchs - Kommanditgesellschaft - | Method for producing a structural component from a high-strength alloy material |
Also Published As
Publication number | Publication date |
---|---|
RU2016133502A (en) | 2018-03-22 |
EP3071365A1 (en) | 2016-09-28 |
US20170074105A1 (en) | 2017-03-16 |
RU2016133502A3 (en) | 2018-03-22 |
WO2015121016A1 (en) | 2015-08-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102828782B (en) | In order to repair the method and apparatus of turbine rotor wheel | |
EP1605068A2 (en) | Homogeneous welding via pre-heating for high strength superalloy joining and material deposition | |
US9163511B2 (en) | Steam turbine bucket tenon restoration through solid state bonding process | |
EP4234894A3 (en) | Turbine assembly maintenance methods | |
US10722989B2 (en) | Turbine rotor disc repairing method | |
US9500080B2 (en) | Method of replacing damaged aerofoil | |
KR20190042051A (en) | Manufacturing method of turbomachine impeller | |
CN104972276A (en) | Process for processing inner ring and outer ring of wind power bearing | |
US20150231690A1 (en) | Method for producing a turbine rotor | |
CA2823519C (en) | Method for repairing compressor or turbine drums | |
CN103728111B (en) | Balancing weight connection structure capable of reducing blade high-cycle fatigue test article frequency | |
CN100548566C (en) | A kind of renovation technique of main drive gear of producing oxygen air compressor | |
CN105081672A (en) | Method for repairing fractured transmission shaft | |
RU2010144486A (en) | METHOD FOR MANUFACTURING A MONOBLOCK SHOVEL DISC WITH RING FOR TEMPORARY HOLDING OF SHOVELS REMOVED BEFORE THE MILLING STEP | |
CN105414889A (en) | Machining and edge-removing method for holes of rotor alloy disc assembly | |
CN101890609A (en) | Method for repairing lining plate-free flat-head cap of spindle of rolling mill | |
US20130294904A1 (en) | Method of repairing a turbine component | |
CN103990935A (en) | Roll shaft repairing method of fast wire mill | |
CN109477387B (en) | Rotor shaft and method for producing a rotor shaft | |
CN104084451B (en) | The method that machine components plastic deformation is corrected | |
JP5853451B2 (en) | Turbine blade forging method | |
US20090320287A1 (en) | Compressor blade flow form technique for repair | |
CN104384815A (en) | Method for repairing corner of locating pin of bearing case | |
CN106460536B (en) | For create and repair turbine assembly method and relevant turbine assembly | |
RU2612108C1 (en) | Method to manufacture bladed integrated disk of gas turbine engine from blank with defects detected during its machining |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SIEMENS ENERGY, INC.;REEL/FRAME:033989/0024 Effective date: 20140708 Owner name: SIEMENS ENERGY, INC., FLORIDA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GRIFFIN, GARY;MARSHALL, JEREMY;SIGNING DATES FROM 20140326 TO 20140707;REEL/FRAME:033988/0979 Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BELL, RALF;REEL/FRAME:033988/0933 Effective date: 20140303 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |