US 12,465,976 B2
Method for operating a device for additive manufacturing of a three-dimensional object
Marc Gronle, Stuttgart (DE)
Assigned to TRUMPF LASER-UND SYSTEMTECHNIK GMBH, Ditzingen (DE)
Filed by TRUMPF Laser—und Systemtechnik GmbH, Ditzingen (DE)
Filed on Apr. 13, 2022, as Appl. No. 17/719,427.
Application 17/719,427 is a continuation of application No. PCT/EP2020/078840, filed on Oct. 14, 2020.
Claims priority of application No. 10 2019 127 952.6 (DE), filed on Oct. 16, 2019.
Prior Publication US 2022/0241861 A1, Aug. 4, 2022
Int. Cl. B22F 10/368 (2021.01); B22F 10/28 (2021.01); B22F 12/41 (2021.01); B22F 12/49 (2021.01); B22F 12/90 (2021.01); B33Y 10/00 (2015.01)
CPC B22F 10/368 (2021.01) [B22F 10/28 (2021.01); B22F 12/41 (2021.01); B22F 12/49 (2021.01); B22F 12/90 (2021.01); B33Y 10/00 (2014.12); B22F 2201/10 (2013.01); B22F 2203/11 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for operating a manufacturing device for additive manufacturing of a three-dimensional object, the method comprising:
irradiating a respective subregion of a plurality of subregions within a building zone in which a beam of a beam source is directed onto a build material by a scanning unit, wherein an amount of energy introduced is chosen such that the build material is solidified, so that a part of the three-dimensional object to be manufactured is formed in the subregion, and
for each respective point in the respective subregion being irradiated by the beam, controlling at least one irradiation parameter that characterizes the irradiation such that the irradiation parameter lies in a process window that changes location-dependently over an area of the building zone,
wherein a respective predefined process window is defined for each respective subregion of the plurality of subregions, the respective predefined process window presets a relationship between a sensor signal detected by a sensor unit and permissible values for the irradiation parameter, wherein the process window for the respective point corresponds to the respective predefined process window defined for the respective subregion or to two or more predefined process windows defined for subregions nearest to the respective point, and
wherein the predefined process window for each respective subregion is defined for a respective preset fixed point in the respective subregion, and the method further comprises, for the respective point that deviates from the preset fixed point, determining the process window for the respective point by linear interpolation of the two or more predefined process windows defined for the subregions nearest to the respective point.