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 |
Effect of Additive and Subtractive Sequence on Distortion During Hybrid Directed Energy Deposition |
Author(s) |
Guru Charan Reddy Madireddy, Yousub Lee, Rangasayee Kannan, Kyle Saleeby, Eric MacDonald, Thomas Feldhausen |
On-Site Speaker (Planned) |
Guru Charan Reddy Madireddy |
Abstract Scope |
Hybrid additive manufacturing combines additive manufacturing and subtractive processing intertwined during fabrication for the simultaneous benefits of both additive manufacturing (complex geometries and mass customization) and traditional processes (improved surface finish and dimensional accuracies). However, two processes that are otherwise identical except for the sequencing of additive and subtractive steps can lead to different results as differences in distortion can result in process-to-process registration. In this work, a single identical geometry was fabricated with two hybrid process orderings and the resulting geometric compliance is compared both experimentally and through finite element modeling. By fabricating support features first before machining and tool change-out cooling, subsequent geometric features can be successfully printed which would otherwise be susceptible to excessive distortion. The study found that final distortion in geometry is dependent on additive and subtractive process sequencing in hybrid additive manufacturing and the FE model was validated for distortion prediction. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |