EP2949864A1 - Component with sensor and sensor installation method - Google Patents
Component with sensor and sensor installation method Download PDFInfo
- Publication number
- EP2949864A1 EP2949864A1 EP14170188.8A EP14170188A EP2949864A1 EP 2949864 A1 EP2949864 A1 EP 2949864A1 EP 14170188 A EP14170188 A EP 14170188A EP 2949864 A1 EP2949864 A1 EP 2949864A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- sensor
- coupon
- cavity
- joining
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 15
- 238000009434 installation Methods 0.000 title description 3
- 238000005259 measurement Methods 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 238000005304 joining Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000012720 thermal barrier coating Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000009420 retrofitting Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Images
Classifications
-
- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/02—Arrangement of sensing elements
-
- 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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
-
- 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
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/20—Specially-shaped blade tips to seal space between tips and stator
-
- 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
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/288—Protective coatings for blades
-
- 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
- F05D2230/234—Laser 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
- F05D2230/90—Coating; Surface treatment
-
- 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
- F05D2260/00—Function
- F05D2260/80—Diagnostics
-
- 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
- F05D2260/00—Function
- F05D2260/83—Testing, e.g. methods, components or tools therefor
-
- 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
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
-
- 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
- F05D2270/00—Control
- F05D2270/80—Devices generating input signals, e.g. transducers, sensors, cameras or strain gauges
-
- 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
- F05D2270/00—Control
- F05D2270/80—Devices generating input signals, e.g. transducers, sensors, cameras or strain gauges
- F05D2270/808—Strain gauges; Load cells
Definitions
- the present disclosure relates generally to monitoring parameters of component located in a working fluid and particularly to the installation of measurement devices in a gas turbine steam turbine, HRSG, or boilers.
- a direct measurement solution is discussed in US patent application 2006/0056959 A1 .
- the solution involves providing a component for use in a combustion turbine having a substrate with a micro-electromechanical system (MEMS) device affixed to the substrate. At least one deposited connector is in electrical communication with the MEMS device and is used to route a data signal from the MEMs device to a termination location.
- the MEMS device is deposited in a number of trenches in a thermal barrier coating of the component.
- a component and a simplified method for retrofitting a component with a sensor are provided.
- the disclosure is generally based on fixing a coupon embedded with a sensor to a working fluid exposed component.
- coupons are a known to be used to repairing components the solution provides a simple means of retrofitting components with sensors, in particularly during component repair.
- a Component that is configured to be exposed to the working fluid of a turbine such as a turbine blade, comprises a coupon that is fitted, such as by welding, in or located on the component and a measurement sensor embedded in and/or located on the coupon.
- the sensor may be configured to measure one or more of a selection of temperature, pressure and strain.
- the sensor is a self-powered, wireless sensor which may include an antenna.
- a coating such as a thermal barrier coating covers an outer layer of the sensor and at least part of an outer surface of the coupon.
- the component includes a measurement channel with a first opening through a surface of the component and a second opening fluidly connected to the sensor.
- An aspect includes a method of fitting and joining a sensor to a turbine blade, comprising the steps of forming a cavity in the turbine blade, forming a coupon fittable within the cavity, embedding a sensor in or on the coupon and fitting and joining the coupon, with the sensor, in the cavity.
- the method includes the step of coating the coupon with a thermal barrier coating after the step of fitting and joining of the coupon.
- a component has a cavity 6 in which a coupon 8 having an embedded sensor 14 may be fixed.
- a surface of the sensor 14 and at least part of a surface of the coupon 8 is covered with a coating 12, such as a thermal barrier coating, to protect the sensor 14 and the coupon 8.
- the coating 12 may also extend over the component 2.
- the sensor may be any type of MEMs sensor including self-powered wireless sensors configured to measure temperature, pressure and/or strain.
- the coupon 8 may be fixed within the cavity 6 using any known method of fixing coupons to components as part of component repair methods.
- the fixing/joining may therefore include, brazing and/or welding, including laser welding.
- coupon 8 may be part of a turbine blade 4.
- the embedded sensor 14 may further include an antenna 16, also embedded in the coupon 8, to embedded wireless communication with the sensor 14.
- the coupon itself may take any shape including curved straight, flat or any other shape.
- it may be formed by any known method or technology including selective laser melting.
- the component 2 is a turbine blade 4 that includes a measurement channel 18 fluidly connected to a fitted coupon 8 and sensor 14.
- a property of the working fluid such as pressure
- the measurement channel 18 with a first end opening to the working fluid and a second end in fluid contact with the sensor 14 may be formed prior to the installation of the coupon 8, for example during manufacture of the blade using a techniques including but not limited to Selective Laser Melting, casting, and drilling.
- the cavity 6 for fitting and joining the coupon 8 is first formed in the component 2.
- Methods for forming the cavity include machining, electro-chemical processes such as milling, die sinking, or direct build-up by additive manufacturing of the coupon with cavity,..
- a cavity 6 is formed in a component 2, a coupon10, fittable within the cavity 6 is formed, a sensor 14 is embedded in or on the coupon 8 and the coupon 8 is fixed into the cavity.
- the order which the cavity 6 and coupon 8 are formed is not significant.
- At least part of a surface of the coupon 8 and a surface of the sensor 14 is covered by a coating 12.
Abstract
Description
- The present disclosure relates generally to monitoring parameters of component located in a working fluid and particularly to the installation of measurement devices in a gas turbine steam turbine, HRSG, or boilers.
- In order to obtain information regarding the internal status and condition of a gas turbine engine, there is a need to measure or at least estimate conditions. While it may be possible to estimate conditions using numerical methods it is preferably to obtain data by direct measurement.
- A direct measurement solution is discussed in
US patent application 2006/0056959 A1 . The solution involves providing a component for use in a combustion turbine having a substrate with a micro-electromechanical system (MEMS) device affixed to the substrate. At least one deposited connector is in electrical communication with the MEMS device and is used to route a data signal from the MEMs device to a termination location. The MEMS device is deposited in a number of trenches in a thermal barrier coating of the component. - The requirement for trenches and routing of connections to distal locations of the component increases the difficulty in retrofitting such solution to existing components.
- Provided is a component and a simplified method for retrofitting a component with a sensor.
- It attempts to address this problem by means of the subject matters of the independent claims. Advantageous embodiments are given in the dependent claims.
- The disclosure is generally based on fixing a coupon embedded with a sensor to a working fluid exposed component. As coupons are a known to be used to repairing components the solution provides a simple means of retrofitting components with sensors, in particularly during component repair.
- In an aspect a Component, that is configured to be exposed to the working fluid of a turbine such as a turbine blade, comprises a coupon that is fitted, such as by welding, in or located on the component and a measurement sensor embedded in and/or located on the coupon. The sensor may be configured to measure one or more of a selection of temperature, pressure and strain. In a further aspect the sensor is a self-powered, wireless sensor which may include an antenna.
- In a further aspect a coating, such as a thermal barrier coating covers an outer layer of the sensor and at least part of an outer surface of the coupon.
- In a further aspect the component includes a measurement channel with a first opening through a surface of the component and a second opening fluidly connected to the sensor.
- An aspect includes a method of fitting and joining a sensor to a turbine blade, comprising the steps of forming a cavity in the turbine blade, forming a coupon fittable within the cavity, embedding a sensor in or on the coupon and fitting and joining the coupon, with the sensor, in the cavity.
- In a further aspect the method includes the step of coating the coupon with a thermal barrier coating after the step of fitting and joining of the coupon.
- It is a further object of the invention to overcome or at least ameliorate the disadvantages and shortcomings of the prior art or provide a useful alternative.
- Other aspects and advantages of the present disclosure will become apparent from the following description, taken in connection with the accompanying drawings which by way of example illustrate exemplary embodiments of the present invention.
- By way of example, an embodiment of the present disclosure is described more fully hereinafter with reference to the accompanying drawings, in which:
-
Figure 1 is a side cut view of a component with a cavity not fitted coupon that has an embedded sensor according to an exemplary embodiment of the disclosure; -
Figure 2 is a perspective of another exemplary embodiment wherein the component is a turbine blade; and -
Figure 3 is a perspective of another exemplary embodiment wherein the sensor is fitted to the component and the component includes a measurement channel in fluid contact with the embedded sensor. - Exemplary embodiments of the present disclosure are now described with references to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth to provide a thorough understanding of the disclosure. However, the present disclosure may be practiced without these specific details, and is not limited to the exemplary embodiment disclosed herein.
- In an exemplar embodiment shown in
Fig 1 a component, has acavity 6 in which acoupon 8 having an embeddedsensor 14 may be fixed. In an exemplary embodiment a surface of thesensor 14 and at least part of a surface of thecoupon 8 is covered with acoating 12, such as a thermal barrier coating, to protect thesensor 14 and thecoupon 8. Thecoating 12 may also extend over thecomponent 2. - The sensor may be any type of MEMs sensor including self-powered wireless sensors configured to measure temperature, pressure and/or strain.
- The
coupon 8 may be fixed within thecavity 6 using any known method of fixing coupons to components as part of component repair methods. The fixing/joining may therefore include, brazing and/or welding, including laser welding. - In an exemplary embodiment shown in
Fig. 2 coupon 8 may be part of aturbine blade 4. In addition, the embeddedsensor 14 may further include anantenna 16, also embedded in thecoupon 8, to embedded wireless communication with thesensor 14. - The coupon itself may take any shape including curved straight, flat or any other shape. In addition it may be formed by any known method or technology including selective laser melting.
- In an exemplary embodiment shown in
Fig. 3 thecomponent 2 is aturbine blade 4 that includes ameasurement channel 18 fluidly connected to a fittedcoupon 8 andsensor 14. In this embodiment direct measurement of a property of the working fluid, such as pressure, is enabled. Themeasurement channel 18 with a first end opening to the working fluid and a second end in fluid contact with thesensor 14 may be formed prior to the installation of thecoupon 8, for example during manufacture of the blade using a techniques including but not limited to Selective Laser Melting, casting, and drilling. - In an exemplary embodiment where the
coupon 8 with embeddedsensor 14 is retrofitted to a component as part of a component repair, thecavity 6 for fitting and joining thecoupon 8 is first formed in thecomponent 2. Methods for forming the cavity include machining, electro-chemical processes such as milling, die sinking, or direct build-up by additive manufacturing of the coupon with cavity,.. - In an exemplary method, a
cavity 6 is formed in acomponent 2, a coupon10, fittable within thecavity 6 is formed, asensor 14 is embedded in or on thecoupon 8 and thecoupon 8 is fixed into the cavity. The order which thecavity 6 andcoupon 8 are formed is not significant. - In a further exemplary method, at least part of a surface of the
coupon 8 and a surface of thesensor 14 is covered by acoating 12. - Although the disclosure has been herein shown and described in what is conceived to be the most practical exemplary embodiment, it will be appreciated by those skilled in the art that the present disclosure can be embodied in other specific forms. The presently disclosed embodiments are therefore considered in all respects to be illustrative and not restricted. The scope of the disclosure is indicated by the appended claims rather that the foregoing description and all changes that come within the meaning and range and equivalences thereof are intended to be embraced therein.
-
- 2
- Component
- 4
- Turbine blade
- 6
- Cavity
- 8
- Coupon
- 12
- Coating
- 14
- Sensor
- 16
- Antenna
- 18
- Measurement channel
Claims (10)
- A component (2) configured to be exposed to a working fluid, the component (2) comprising:a coupon (8) fitted in or located on the component (2); anda measurement sensor (14) embedded in and/or located on the coupon (8).
- The component (2) of claim 1 wherein the component (2) is a turbine blade (4).
- The component (2) of claim 1 or 2 wherein the measurement sensor (14) is configured to measure one or more of a selection of temperature, pressure and strain.
- The component (2) of claim 1 or 2 wherein a coating (12) covers an outer layer of the sensor (14) and at least part of an outer surface of the coupon (10).
- The component (2) of claim 1 or 2 wherein the sensor (14) is a self-powered, wireless sensor (14).
- The component (2) of claim 1 or 2 further including a measurement channel (18) with a first opening through a surface of the component (2) and a second opening fluidly connected to the sensor (14).
- The component (2) of any one of claims 1 to 6 wherein the sensor (14) includes an antenna (16) for wireless communication from the sensor (14).
- A method of fitting and joining a sensor (14) to a turbine blade (4), comprising the steps of:forming a cavity (6) in the turbine blade (4);forming a coupon (8) fittable within the cavity (6);embedding the sensor (14) in or on the coupon (8, 10); andfitting and joining the coupon (8, in the cavity (6).
- The method of claim 8 further including the step of coating (12) the coupon (8) with a thermal barrier coating (12) after the step of fitting and joining the coupon (8).
- The method of claim 8 wherein fitting and joining the coupon (8) in the cavity (6) includes laser welding the coupon (8) to the component (2).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14170188.8A EP2949864B1 (en) | 2014-05-28 | 2014-05-28 | Component with sensor and sensor installation method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14170188.8A EP2949864B1 (en) | 2014-05-28 | 2014-05-28 | Component with sensor and sensor installation method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2949864A1 true EP2949864A1 (en) | 2015-12-02 |
EP2949864B1 EP2949864B1 (en) | 2017-07-05 |
Family
ID=50884238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14170188.8A Active EP2949864B1 (en) | 2014-05-28 | 2014-05-28 | Component with sensor and sensor installation method |
Country Status (1)
Country | Link |
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EP (1) | EP2949864B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017208645A1 (en) * | 2017-05-22 | 2018-11-22 | Siemens Aktiengesellschaft | Probe head |
EP3627254A1 (en) * | 2018-09-18 | 2020-03-25 | Siemens Aktiengesellschaft | Product manufactured by additive manufacturing containing active component, method of manufacturing and machine |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060056959A1 (en) | 2002-09-23 | 2006-03-16 | Siemens Westinghouse Power Corporation | Apparatus and method of monitoring operating parameters of a gas turbine |
GB2452026A (en) * | 2007-07-27 | 2009-02-25 | Assystem | Aerofoil or instrumentation rake with integrally formed instrumentation elements |
US7604402B2 (en) * | 2006-03-20 | 2009-10-20 | Alstom Technology Ltd | Measuring device for measuring the temperature of a thermally loaded metallic base element, provided with a protective surface coating, and method for producing such a measuring device |
US20110100964A1 (en) * | 2008-04-10 | 2011-05-05 | Bernd Burbaum | Welding process with a controlled temperature profile and a device therefor |
US20110280279A1 (en) * | 2010-05-12 | 2011-11-17 | Gregory Otto J | Wireless temperature measurement system and methods of making and using same |
US20120128468A1 (en) * | 2010-11-22 | 2012-05-24 | Kurt Kramer Schleif | Sensor assembly for use with a turbomachine and methods of assembling same |
-
2014
- 2014-05-28 EP EP14170188.8A patent/EP2949864B1/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060056959A1 (en) | 2002-09-23 | 2006-03-16 | Siemens Westinghouse Power Corporation | Apparatus and method of monitoring operating parameters of a gas turbine |
US7604402B2 (en) * | 2006-03-20 | 2009-10-20 | Alstom Technology Ltd | Measuring device for measuring the temperature of a thermally loaded metallic base element, provided with a protective surface coating, and method for producing such a measuring device |
GB2452026A (en) * | 2007-07-27 | 2009-02-25 | Assystem | Aerofoil or instrumentation rake with integrally formed instrumentation elements |
US20110100964A1 (en) * | 2008-04-10 | 2011-05-05 | Bernd Burbaum | Welding process with a controlled temperature profile and a device therefor |
US20110280279A1 (en) * | 2010-05-12 | 2011-11-17 | Gregory Otto J | Wireless temperature measurement system and methods of making and using same |
US20120128468A1 (en) * | 2010-11-22 | 2012-05-24 | Kurt Kramer Schleif | Sensor assembly for use with a turbomachine and methods of assembling same |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017208645A1 (en) * | 2017-05-22 | 2018-11-22 | Siemens Aktiengesellschaft | Probe head |
EP3627254A1 (en) * | 2018-09-18 | 2020-03-25 | Siemens Aktiengesellschaft | Product manufactured by additive manufacturing containing active component, method of manufacturing and machine |
WO2020058181A1 (en) * | 2018-09-18 | 2020-03-26 | Siemens Aktiengesellschaft | Active am manufactured product, method of manufacturing and machine |
CN112771460A (en) * | 2018-09-18 | 2021-05-07 | 西门子能源环球有限责任两合公司 | Active additive manufacturing product, manufacturing method and machine |
Also Published As
Publication number | Publication date |
---|---|
EP2949864B1 (en) | 2017-07-05 |
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