About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Presentation Title |
Using Acoustic Signals For Torch-to-Bead Distance Estimation and Closed-Loop Control in Wire Arc Additive Manufacturing |
Author(s) |
Jinhan Ren, Rene Mai, Ashlynn Allison, Johnson Samuel, Sandipan Mishra |
On-Site Speaker (Planned) |
Jinhan Ren |
Abstract Scope |
Wire Arc Additive Manufacturing is a Direct Energy Deposition process in Additive Manufacturing where metal wires are melted and deposited layer-by-layer to fabricate 3-dimensional objects. One of the important challenges is variation in torch-to-bead distance, caused by uneven bead height and width. We propose a method for closed-loop control of welding parameters using microphones to monitor and predict the weld torch-to-bead distance. Specifically, using a set of acoustic features corresponding to a known height profile as nominal characteristics allows comparison with input acoustic features corresponding to an unknown height profile. The difference between the nominal acoustic features and the unknown height profile's acoustic features allows us to build a model from the input acoustic signal to the resulting prediction of the bead height, which can be used for closed-loop control in the WAAM process to maintain consistent torch heights and even prints. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |