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 |
Experimental Analysis and Optimization of Gas Flow in an Open-Architecture Metal L-PBF System |
Author(s) |
Magnus Bolt, Moritz Reinhard Ludwig Zwicker, Venkata Karthik Nadimpalli, Sebastian Aagaard Andersen, David Bue Pedersen |
On-Site Speaker (Planned) |
Magnus Bolt |
Abstract Scope |
The crossflow is a crucial subsystem in the metal laser powder bed fusion process. It ensures process stability and minimizes contamination of the finished component. The flow removes spatter and condensate from the process area - and it removes the plume that otherwise clouds the laser leading to a decrease in the laser power leading to a non-uniform energy density. The flow is measured in-situ in 3D space using an XYZ gantry inside a custom-built L-PBF machine. The effect of the gas inlet geometry, as well as the impact of the in-line filter, are studied. The clogging of the filter over time necessitates closed-loop control of the main blower while the process is running. The main blower is controlled by the central control unit via a variable frequency drive. The control input comes from the thin-film anemometer which is also used to measure the flow field. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |