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Proceedings Paper

Experiments for practical education in process parameter optimization for selective laser sintering to increase workpiece quality
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Paper Abstract

Selective Laser Sintering (SLS) is considered as one of the most important additive manufacturing processes due to component stability and its broad range of usable materials. However the influence of the different process parameters on mechanical workpiece properties is still poorly studied, leading to the fact that further optimization is necessary to increase workpiece quality. In order to investigate the impact of various process parameters, laboratory experiments are implemented to improve the understanding of the SLS limitations and advantages on an educational level. Experiments are based on two different workstations, used to teach students the fundamentals of SLS. First of all a 50 W CO2 laser workstation is used to investigate the interaction of the laser beam with the used material in accordance with varied process parameters to analyze a single-layered test piece. Second of all the FORMIGA P110 laser sintering system from EOS is used to print different 3D test pieces in dependence on various process parameters. Finally quality attributes are tested including warpage, dimension accuracy or tensile strength. For dimension measurements and evaluation of the surface structure a telecentric lens in combination with a camera is used. A tensile test machine allows testing of the tensile strength and the interpreting of stress-strain curves. The developed laboratory experiments are suitable to teach students the influence of processing parameters. In this context they will be able to optimize the input parameters depending on the component which has to be manufactured and to increase the overall quality of the final workpiece.

Paper Details

Date Published: 6 April 2016
PDF: 9 pages
Proc. SPIE 9738, Laser 3D Manufacturing III, 973817 (6 April 2016); doi: 10.1117/12.2209562
Show Author Affiliations
Bernd Reutterer, Fachhochschule Technikum Wien (Austria)
Lukas Traxler, Fachhochschule Technikum Wien (Austria)
Natascha Bayer, Fachhochschule Technikum Wien (Austria)
Andreas Drauschke, Fachhochschule Technikum Wien (Austria)

Published in SPIE Proceedings Vol. 9738:
Laser 3D Manufacturing III
Bo Gu; Henry Helvajian; Alberto Piqué, Editor(s)

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