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Acoustic emissions ...
Acoustic emissions in directed energy deposition processes
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- Hauser, Tobias (författare)
- Luleå tekniska universitet,Produkt- och produktionsutveckling,Technology Department, Siemens AG, 81739 Munich, Germany
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- Reisch, Raven T. (författare)
- Chair of Robotics, Artificial Intelligence and Real-Time Systems, Technical University of Munich, 80333, Munich, Germany; Technology Department, Siemens AG, 81739, Munich, Germany
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- Kamps, Tobias (författare)
- Technology department, Siemens AG, D-81739 Munich, Germany
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- Kaplan, Alexander F.H. (författare)
- Luleå tekniska universitet,Produkt- och produktionsutveckling
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- Volpp, Joerg (författare)
- Luleå tekniska universitet,Produkt- och produktionsutveckling
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(creator_code:org_t)
- 2022-01-07
- 2022
- Engelska.
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Ingår i: The International Journal of Advanced Manufacturing Technology. - : Springer. - 0268-3768 .- 1433-3015. ; 119:5-6, s. 3517-3532
- Relaterad länk:
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https://doi.org/10.1...
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https://link.springe...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Acoustic emissions in directed energy deposition processes such as wire arc additive manufacturing and directed energy deposition with laser beam/metal are investigated within this work, as many insights about the process can be gained from this. In both processes, experienced operators can hear whether a process is running stable or not. Therefore, different experiments for stable and unstable processes with common process anomalies were carried out, and the acoustic emissions as well as process camera images were captured. Thereby, it was found that stable processes show a consistent mean intensity in the acoustic emissions for both processes. For wire arc additive manufacturing, it was found that by the Mel spectrum, a specific spectrum adapted to human hearing, the occurrence of different process anomalies can be detected. The main acoustic source in wire arc additive manufacturing is the plasma expansion of the arc. The acoustic emissions and the occurring process anomalies are mainly correlating with the size of the arc because that is essentially the ionized volume leading to the air pressure which causes the acoustic emissions. For directed energy deposition with laser beam/metal, it was found that by the Mel spectrum, the occurrence of an unstable process can also be detected. The main acoustic emissions are created by the interaction between the powder and the laser beam because the powder particles create an air pressure through the expansion of the particles from the solid state to the liquid state when these particles are melted. These findings can be used to achieve an in situ quality assurance by an in-process analysis of the acoustic emissions.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
Nyckelord
- Wire arc additive manufacturing
- Laser metal deposition
- WAAM
- LMD
- In situ monitoring
- Airborne acoustic emissions
- Produktionsutveckling
- Manufacturing Systems Engineering
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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