US 11,914,341 B2
Exposure strategy in multiple-beam am systems
Martin Schade, Munich (DE); Albert Fruth, Germering (DE); Robert Achim Domröse, Germering (DE); Maximilian Mittermüller, Munich (DE); Michael Göth, Munich (DE); Markus Kuchenbaur, Munich (DE); and Michael Kowal, Munich (DE)
Assigned to EOS GmbH Electro Optical Systems, Krailling (DE)
Appl. No. 16/496,594
Filed by EOS GmbH Electro Optical Systems, Krailling (DE)
PCT Filed Mar. 7, 2018, PCT No. PCT/EP2018/055626
§ 371(c)(1), (2) Date Sep. 23, 2019,
PCT Pub. No. WO2018/172080, PCT Pub. Date Sep. 27, 2018.
Claims priority of application No. 102017205053.5 (DE), filed on Mar. 24, 2017.
Prior Publication US 2021/0114111 A1, Apr. 22, 2021
Int. Cl. B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01); B23K 26/342 (2014.01); B29C 64/153 (2017.01); B22F 10/36 (2021.01); B29C 64/386 (2017.01); B33Y 50/00 (2015.01); B22F 10/80 (2021.01); B22F 10/85 (2021.01); B22F 10/28 (2021.01); B22F 12/13 (2021.01); B22F 12/41 (2021.01); B22F 12/45 (2021.01); B22F 10/366 (2021.01); G05B 19/4099 (2006.01)
CPC G05B 19/4099 (2013.01) [B22F 10/36 (2021.01); B22F 10/80 (2021.01); B23K 26/342 (2015.10); B29C 64/153 (2017.08); B29C 64/386 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/00 (2014.12); B33Y 50/02 (2014.12); B22F 10/28 (2021.01); B22F 10/366 (2021.01); B22F 10/85 (2021.01); B22F 12/13 (2021.01); B22F 12/41 (2021.01); B22F 12/45 (2021.01); G05B 2219/49013 (2013.01); G05B 2219/49018 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A computer-based method of generating a control dataset for a layer-wise additive manufacturing apparatus for manufacturing a three-dimensional object, wherein the additive manufacturing apparatus manufactures the three dimensional object layer by layer by directing a plurality of beams onto areas of a layer of building material that correspond to an object cross-section, an input device configured to direct the plurality of beams to different regions of the layer, each of the beams acting on the building material where the beam impinges on the layer,
wherein the method of generating theft control dataset comprises:
a first step of accessing a layer dataset containing a data model of the layer to be selectively solidified, wherein in the data model positions corresponding to the object cross-section are marked as positions at which a solidification of the building material will be carried out;
a second step of modifying the layer dataset to specify the number of beams to solidify the building material within the portion depending on specifications for a homogeneity of the portion or a homogeneity of the manufactured three-dimensional object and/or on a manufacturing time for the three-dimensional object, wherein the number of beams used is decreased to achieve a larger homogeneity of the portion of the three-dimensional object, and the number of beams used is increased to lower the manufacturing time for the three-dimensional object; and
a third step of providing the modified layer dataset as the control dataset for the additive manufacturing apparatus.