Method for dimensional compensation of a 3D object to be formed by an additive manufacturing apparatus

A method for dimensional compensation of a 3D object to be formed by an apparatus for the layerwise manufacture of objects from build material comprises receiving an object model to form a corresponding object in an apparatus for the manufacture of objects, positioning the model in a virtual build v...

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Bibliographische Detailangaben
Hauptverfasser:	Christopher Pleass, Robert May, Anders Hartmann, Alexander Roy McArthur, Torben Lange
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 AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING IMAGE DATA PROCESSING OR GENERATION, IN GENERAL PERFORMING OPERATIONS PHYSICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A method for dimensional compensation of a 3D object to be formed by an apparatus for the layerwise manufacture of objects from build material comprises receiving an object model to form a corresponding object in an apparatus for the manufacture of objects, positioning the model in a virtual build volume representing an actual build volume of the apparatus in which the object is to be formed, and determining a reference point for the object model, such as a centre of mass/gravity, to determine a location within the volume. A scaling factor corresponding to the model location is selected from a scaling factor map 30 comprising a plurality of predetermined scaling factors 40 corresponding to a plurality of location within the volume, and the factor is then applied to the object model. This allows for compensation for differential shrinkage within a build volume during additive manufacturing, such as powder bed fusion.