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)
|
Presentation Title |
Molten Metal Droplet Watcher Through Optoelectronic Sensing |
Author(s) |
Daniel Cormier, Jacob Adkins, Kareem Tawil, Chris Chungbin, David Trauernicht, Zipeng Guo, Denis Cormier |
On-Site Speaker (Planned) |
Zipeng Guo |
Abstract Scope |
Consistent jetting of droplets is crucial in molten metal droplet AM where variations in temperature, pressure, and molten metal dynamics can affect drop size and velocity. These inconsistencies accumulate to produce defects in molten metal jetting (MMJ) parts. Conventional high-speed camera inspection methods have been used to capture droplet characteristics. However, the large quantity of video data generated with multi-nozzle jetting requires offline data processing and open-loop adjustments, which is cost-intensive and time-consuming. This work presents a high speed optoelectronic sensing approach for measuring drop size and velocity that is suitable for real-time monitoring and closed-loop control. A 650 nm laser source coupled with a silicon photodiode serves as the drop watcher sensing device. Preliminary results show that the drop watcher successfully captures drop size and velocity in real time, and can even detect satellite drops. This talk will share insights from both process development and data processing perspectives. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |