POWDER REMOVAL FROM A PRINTED WORKPIECE

Disclosed is a system (100) for depowdering a workpiece formed from a reactive powder by an additive manufacturing process. The system includes a powder removal enclosure (119), an inert gas source (121), a sealed ultrasonic transducer (110), an oxygen sensor (128), and a controller (127) coupled to...

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Bibliographische Detailangaben
Hauptverfasser:	MORGANSON, David W, GUSTAFSON, Brendan T
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADDITIVE MANUFACTURING TECHNOLOGY ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CASTING MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER PERFORMING OPERATIONS POWDER METALLURGY SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING METALLIC POWDER WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Disclosed is a system (100) for depowdering a workpiece formed from a reactive powder by an additive manufacturing process. The system includes a powder removal enclosure (119), an inert gas source (121), a sealed ultrasonic transducer (110), an oxygen sensor (128), and a controller (127) coupled to the sealed ultrasonic transducer (110) and the oxygen sensor (128). The controller (127) is configured to perform a plurality of operations including monitoring the oxygen sensor (128) to observe an oxygen level within the powder removal enclosure (119) as an inert gas from the inert gas source (121) displaces a gas environment within the powder removal enclosure (119), and applying electrical power to the sealed ultrasonic transducer (110) within the powder removal enclosure (119) to ultrasonically remove a residual amount of the reactive powder from the workpiece based on determining that the oxygen level within the powder removal enclosure (119) is below a minimum oxygen level threshold.