US 11,850,661 B2
Method of segmenting object to be manufactured by energy input parameter and passing energy beam across segments
Michael Göth, Munich (DE); Ludger Hümmeler, Gauting (DE); and Alexander Bockstaller, Stockdorf (DE)
Assigned to EOS GmbH Electro Optical Systems, Krailling (DE)
Appl. No. 16/636,699
Filed by EOS GmbH Electro Optical Systems, Krailling (DE)
PCT Filed Aug. 2, 2018, PCT No. PCT/EP2018/071079
§ 371(c)(1), (2) Date Feb. 5, 2020,
PCT Pub. No. WO2019/030127, PCT Pub. Date Feb. 14, 2019.
Claims priority of application No. 102017213720.7 (DE), filed on Aug. 7, 2017.
Prior Publication US 2020/0164437 A1, May 28, 2020
Int. Cl. B22F 10/85 (2021.01); B33Y 50/02 (2015.01); B22F 10/36 (2021.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); G06F 30/17 (2020.01); B22F 10/38 (2021.01); B22F 10/28 (2021.01)
CPC B22F 10/85 (2021.01) [B22F 10/36 (2021.01); B22F 10/38 (2021.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12); G06F 30/17 (2020.01); B22F 10/28 (2021.01)] 12 Claims
OG exemplary drawing
 
1. A computer-based method of providing control data for an additive manufacturing apparatus for manufacturing a three-dimensional object, the additive manufacturing apparatus being capable of manufacturing the object by applying a building material in layers and solidifying the building material by supplying radiant energy in each of the layers at positions that are assigned to a cross-section of the object in the layer, wherein an energy input unit scans the positions with an energy beam so that energy is input into the building material according to a set of energy input parameters, wherein the method comprises:
a first step of accessing computer-based model data of at least one portion of the object to be manufactured;
a second step of determining a first partial region and a second partial region inside of the at least one object portion, the first partial region and second partial region abutting each other at a border;
a third step of generating a data model of a region of a building material layer to be selectively solidified by scanning the positions in the region with the energy beam in order to manufacture the at least one object portion, the data model comprising in which a first partial region cross-section is cutting the first partial region and a second partial region cross-section is cutting the second partial region,
wherein it is specified in the data model that:
in the first partial region cross-section at least one of the energy input parameters on average has a first value, and in the second partial region cross-section at least one of the energy input parameters has a second value different than the first value, the positions of the first and second partial cross-sections being scanned with the same energy beam; and
the energy beam is moved across the border at least once while inputting energy into the building material by the energy beam; such that the value of the at least one energy input parameter is changed inside of a border region, the border region being a region on at least one side of the border in the building material layer described by the data model; and
a fourth step of providing control data for the generation of a control dataset for the additive manufacturing apparatus, the control data corresponding to the data model generated in the third step.