METHOD, DEVICE AND APPARATUS FOR CONTROLLING AN IRRADIATION BEAM

We describe a method for controlling an irradiation beam for irradiating a layer of raw material powder in an additive layer manufacturing process for producing a three-dimensional work piece, wherein the method comprises: depositing, with a layer depositing mechanism, a said layer of raw material p...

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Bibliographische Detailangaben
1. Verfasser:	WILKES, Jan
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:	We describe a method for controlling an irradiation beam for irradiating a layer of raw material powder in an additive layer manufacturing process for producing a three-dimensional work piece, wherein the method comprises: depositing, with a layer depositing mechanism, a said layer of raw material powder on top of a carrier and/or on top of a preceding material layer on top of the carrier; and controlling the irradiation beam to irradiate at least a portion of the layer of raw material powder in an irradiation area when a distance between the irradiation area and the layer depositing mechanism is above a threshold distance, and wherein the threshold distance is dependent on (i) a speed of movement of the layer depositing mechanism, and (ii) a speed, vg, of a gas flow over the layer of raw material powder.