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High-Speed Cameras Used to Monitor 3D Printing Process https://ift.tt/2NB0rm5 3D printing, particulalry laser-powder bed fusion or L-PBF, requires a great deal of monitoring to avoid defects and flaws in the final parts. In a thesis entitled “Process Monitoring for Temporal-Spatial Modeling of Laser Powder Bed Fusion,” a student named Animek Shaurya studies the use of high-speed video cameras for in-situ monitoring of the 3D printing process of nickel alloy 625 to detect meltpool, splatter, and over melting regions to improve the quality of the print.
Another objective of the research is to study meltpool locations and the types being generated during over melting, normal melting and under melting. There are two main types of meltpool: Type One, in which the meltpool area being processed is still within the heat-affected zone of the previous hatch scanning (or track processing); and Type Two, in which the meltpool area being processed is no longer affected by the heat from laser scanning of the previous track or hatch. For the study, an EOS Direct Metal Laser Sintering Machine was used to 3D print nickel cubes. Experiments were designed to establish It was shown that over melting occurs more frequently in the processing of Type One tracks than in Type Two tracks.
Spattering happens more in Type One tracks than in Type Two as well, the video evidence concluded.
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Printing via 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing https://3dprint.com September 25, 2018 at 03:30PM
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