CALIBRATING MULTIPLE LASER BEAMS FOR ADDITIVE MANUFACTURING

A method of automated alignment of scanning optics includes the steps of irradiating an object area of a layer of a powdered material provided on a building platform with at least one irradiation beam and irradiating a calibration area of the layer with at least one irradiation beam. A first irradia...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Krauter, Johann, Mantoan, Elia, Blickle, Valentin, Sailer, Christof, Cavalcabo, Guglielmo
Format:	Patent
Sprache:	eng
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 CASTING MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	A method of automated alignment of scanning optics includes the steps of irradiating an object area of a layer of a powdered material provided on a building platform with at least one irradiation beam and irradiating a calibration area of the layer with at least one irradiation beam. A first irradiation beam is guided with a first scanning optic over an intermediate top face thereby melting a first calibration pattern into the intermediate top face and a second irradiation beam is guided with a second scanning optic over the intermediate top face thereby melting a second calibration pattern into the intermediate top face. At least one image is acquired of the intermediate top face and image points related to the geometrical features of the calibration patterns are identified so that a spatial offset between the geometrical features can be derived. Based on the spatial offset, the scanning optics are aligned.