DEVICE AND METHOD FOR MEASURING POWDER BED DENSITY IN 3D PRINTING / ADDITIVE MANUFACTURING OPERATIONS

A device for measuring powder bed density (PBD) (powder density for a layer) in additive manufacturing (AM) during operation. The device comprises means for determining a mass of the powder and means for determining a volume of the powder during spreading, thereby allowing determination of the powde...

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Bibliographische Detailangaben
Hauptverfasser:	MUNIZ LERMA, Jose Alberto, BROCHU, Mathieu, KUMAR, Amit, RAMAKRISHNAN, Tejas, DING, Yao Yao
Format:	Patent
Sprache:	eng ; fre
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 INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS PERFORMING OPERATIONS PHYSICS TESTING TRANSPORTING WEIGHING
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Beschreibung
Zusammenfassung:	A device for measuring powder bed density (PBD) (powder density for a layer) in additive manufacturing (AM) during operation. The device comprises means for determining a mass of the powder and means for determining a volume of the powder during spreading, thereby allowing determination of the powder bed density (powder density for the layer). The means for determining a volume of the powder comprises a laser assembly adapted to move a laser across a powder layer surface in both left and right directions for scanning. The device further allows for the determination of the layer surface profile as well as static and dynamic powder characteristics of the processes involved in the AM operation. L'invention concerne un dispositif pour mesurer la densité de lit de poudre (PBD) (densité de poudre pour une couche) dans la fabrication additive (AM) pendant le fonctionnement. Le dispositif comprend des moyens servant à déterminer une masse de la poudre et des moyens servant à déterminer un volume de la poudre pendant l'étalement, ce qui permet de déterminer la densité de lit de poudre (densité de poudre pour la couche). Les moyens servant à déterminer un volume de la poudre comprennent un ensemble laser conçu pour déplacer un laser à travers une surface de couche de poudre dans les directions gauche et droite en vue du balayage. Le dispositif permet en outre de déterminer le profil de surface de la couche ainsi que les caractéristiques de poudre statiques et dynamiques des processus impliqués dans l'opération d'AM.