About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Monitoring and Flaw Detection during Wire-based Directed Energy Deposition using In-situ Acoustic Sensing and Wavelet Graph Signal Analysis |
Author(s) |
Benjamin D. Bevans, André Ramalho, Ziyad Smoqi, Aniruddha Gaikwad, Telmo Santos, Prahalada Rao, J.P. Oliveira |
On-Site Speaker (Planned) |
Benjamin D. Bevans |
Abstract Scope |
The goal of this work is to detect flaw formation in the wire-based directed energy deposition (W-DED) process using in-situ sensor data. The W-DED studied in this work uses an electric arc to melt the wire; known as wire arc additive manufacturing (WAAM). The adoption of WAAM in industry is limited in industry due to the lack of process consistency. The process is susceptible to stochastic and environmental disturbances that cause arc instabilities, leading to the formation of porosity and suboptimal geometric integrity. Accordingly, the objective of this work is to detect flaw formation in WAAM using data acquired from an acoustic sensor installed near the electric arc. We develop an approach that extracts a single graph feature (Fiedler number) from the acoustic sensor data, which is subsequently tracked in a control chart. Using this approach, flaw formations are detected with a false alarm rate less-than 2%. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |