POWDER BED FUSION ADDITIVE MANUFACTURING METHODS AND APPARATUS

This invention concerns a powder bed fusion additive manufacturing method comprising forming layers, L1, L2, of powder of a powder bed and exposing the layers, L1, L2, to one or more energy beams to melt the powder to form an object. The exposure of each layer, L1, L2, to the or each energy beam for...

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Bibliographische Detailangaben
Hauptverfasser:	WANG, Xianglong, BROCHU, Mathieu, SHANDIZ, Mohammad, Attarian, LERMA, Jose, Alberto, Muniz, MATA, Oscar, Sanchez
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 CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS POWDER METALLURGY SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM WORKING METALLIC POWDER WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	This invention concerns a powder bed fusion additive manufacturing method comprising forming layers, L1, L2, of powder of a powder bed and exposing the layers, L1, L2, to one or more energy beams to melt the powder to form an object. The exposure of each layer, L1, L2, to the or each energy beam forms melt pools 300a to 300i in a conduction or transition mode with an exposure distance, PD, between adjacent exposures within the layer, L1, L2, being 40% to 60% of a width of the melt pools 300a to 300i generated by the exposures and an offset, OD, of exposures between successively melted layers, L1, L2, in a direction in which the exposure distance. PD, is measured, being 40% to 60% of the exposure distance OD.