Due to the nature of Selective Laser Melting process, the built parts suffer from high chances of defects formation. Powders quality have a significant impact on the final attributes of SLM-manufactured items. From a processing standpoint, it is critical to ensure proper powder distribution and compaction in each layer of the powder bed, which is impacted by particle size distribution, packing density, flowability, and sphericity of the powder particles. Layer-by-layer study of the process can provide better understanding of the effect of powder bed on the final part quality. Image-based processing technique could be used to examine the quality of parts fabricated by Selective Laser Melting through layerwise monitoring and to evaluate the results achieved by other techniques. In this paper, a not supervised methodology based on Digital Image Processing through the build-inmachine camera is proposed. Since the limitation of the optical system in terms of resolution, positioning, lighting, field-of-view, many efforts were paid to the calibration and to the data processing. Its capability to individuate possible defects on SLM parts was evaluated by a Computer Tomography results verification.

Powder bed monitoring via digital image analysis in additive manufacturing / Boschetto, A.; Bottini, L.; Vatanparast, S.. - In: JOURNAL OF INTELLIGENT MANUFACTURING. - ISSN 0956-5515. - (2023). [10.1007/s10845-023-02091-7]

Powder bed monitoring via digital image analysis in additive manufacturing

Boschetto, A.;Bottini, L.;Vatanparast, S.
2023

Abstract

Due to the nature of Selective Laser Melting process, the built parts suffer from high chances of defects formation. Powders quality have a significant impact on the final attributes of SLM-manufactured items. From a processing standpoint, it is critical to ensure proper powder distribution and compaction in each layer of the powder bed, which is impacted by particle size distribution, packing density, flowability, and sphericity of the powder particles. Layer-by-layer study of the process can provide better understanding of the effect of powder bed on the final part quality. Image-based processing technique could be used to examine the quality of parts fabricated by Selective Laser Melting through layerwise monitoring and to evaluate the results achieved by other techniques. In this paper, a not supervised methodology based on Digital Image Processing through the build-inmachine camera is proposed. Since the limitation of the optical system in terms of resolution, positioning, lighting, field-of-view, many efforts were paid to the calibration and to the data processing. Its capability to individuate possible defects on SLM parts was evaluated by a Computer Tomography results verification.
2023
additive manufacturing; selective laser melting; powder bed monitoring; digital image processing
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Powder bed monitoring via digital image analysis in additive manufacturing / Boschetto, A.; Bottini, L.; Vatanparast, S.. - In: JOURNAL OF INTELLIGENT MANUFACTURING. - ISSN 0956-5515. - (2023). [10.1007/s10845-023-02091-7]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1672692
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