High-quality net shape geometries from additively manufactured parts using closed-loop controlled ablation with ultrashort laser pulses
High-quality net shape geometries from additively manufactured parts using closed-loop controlled...
Holder, Daniel; Leis, Artur; Buser, Matthias; Weber, Rudolf; Graf, Thomas
2020-02-25 00:00:00
AbstractAdditively manufactured parts typically deviate to some extent from the targeted net shape and exhibit high surface roughness due to the size of the powder grains that determines the minimum thickness of the individual slices and due to partially molten powder grains adhering on the surface. Optical coherence tomography (OCT)-based measurements and closed-loop controlled ablation with ultrashort laser pulses were utilized for the precise positioning of the LPBF-generated aluminum parts and for post-processing by selective laser ablation of the excessive material. As a result, high-quality net shape geometries were achieved with surface roughness, and deviation from the targeted net shape geometry reduced by 67% and 63%, respectively.
http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.pngAdvanced Optical Technologiesde Gruyterhttp://www.deepdyve.com/lp/de-gruyter/high-quality-net-shape-geometries-from-additively-manufactured-parts-31GaK28H4S
High-quality net shape geometries from additively manufactured parts using closed-loop controlled ablation with ultrashort laser pulses
AbstractAdditively manufactured parts typically deviate to some extent from the targeted net shape and exhibit high surface roughness due to the size of the powder grains that determines the minimum thickness of the individual slices and due to partially molten powder grains adhering on the surface. Optical coherence tomography (OCT)-based measurements and closed-loop controlled ablation with ultrashort laser pulses were utilized for the precise positioning of the LPBF-generated aluminum parts and for post-processing by selective laser ablation of the excessive material. As a result, high-quality net shape geometries were achieved with surface roughness, and deviation from the targeted net shape geometry reduced by 67% and 63%, respectively.
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