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1. (WO2018161994) METHOD FOR ADDITIVE MANUFACTURE OF A THREE-DIMENSIONAL OBJECT

Pub. No.:    WO/2018/161994    International Application No.:    PCT/DE2018/100123
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Wed Feb 14 00:59:59 CET 2018
IPC: B33Y 50/02
B29C 64/393
B29C 64/118
Applicants: RUHR-UNIVERSITÄT BOCHUM
Inventors: RIEGER, Michael
JOHNEN, Benjamin
KUHLENKÖTTER, Bernd
Title: METHOD FOR ADDITIVE MANUFACTURE OF A THREE-DIMENSIONAL OBJECT
Abstract:
The invention relates to a method for additive manufacture of a three-dimensional object, which method is based on a digital model, in which at least one starting area is defined on a surface of the digital model and, beginning on said at least one starting area, a layered sub-division of the model takes place. The layers are successively built up additively to produce the three-dimensional object. The positioning and arrangement of the layers based on the at least one starting area takes place on the basis of the calculation of a distance field, which assigns to each point of the model volume the shortest distance within the volume to the nearest starting area. For each discrete point of a layer defined by a distance field an orientation of a processing head is determined, wherein in particular either the surface normal of the layer is calculated or the gradient vectors of the distance field are calculated, which show the direction of the steepest rise in the distances for the discrete point. The shape and distribution of the layers is adapted to the shape of the digital model. The sequence for the adaptive construction results from the assignment of the layers to distance values, beginning with the lowest distance value in ascending order.