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 |
NEW TIME (was 8:20 am) Intelligent Scan Sequence Generation for Reduced Hot Spots, Residual Stress and Distortion in Multi-laser PBF |
Author(s) |
Chuan He, Chinedum E. Okwudire |
On-Site Speaker (Planned) |
Chinedum E. Okwudire |
Abstract Scope |
Multi-laser powder bed fusion (PBF) machines are gaining attention for improving the productivity and quality of metallic parts produced by additive manufacturing (AM). Recent research by the authors has presented SmartScan, an intelligent scan sequence generation approach that is model-based and optimization-driven. Compared to existing methods, SmartScan has demonstrated up to 41% improvement in thermal uniformity and 47% reduction part deformation in experiments on a single-laser PBF system. This work extends SmartScan to multi-laser PBF systems. A major challenge addressed is the combinatorial nature of optimizing scan sequence for multi-laser systems. A master-slave approximation is proposed to simplify the optimization. Simulation results on a two-laser PBF system demonstrate that the proposed master-slave approximation is 6.3 times faster in computation than the exact solution, at the expense of only 2.6% in optimality. Experiments are planned for the final manuscript submission and oral presentation. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |