US 11,911,852 B2
Analysis of laser beams in systems for a generative manufacturing process
Reinhard Kramer, Pfungstadt (DE); Otto Märten, Dreieich (DE); Stefan Wolf, Groß-Gerau (DE); and Roman Niedrig, Berlin (DE)
Assigned to Primes GmbH Meßtechnik für die Produktion mit Laserstrahlung, Pfungstadt (DE)
Appl. No. 16/306,430
Filed by Primes GmbH Meßtechnik für die Produktion mit Laserstrahlung, Pfungstadt (DE)
PCT Filed Jan. 25, 2017, PCT No. PCT/DE2017/000011
§ 371(c)(1), (2) Date Nov. 30, 2018,
PCT Pub. No. WO2017/137022, PCT Pub. Date Aug. 17, 2017.
Claims priority of application No. 102016001355.9 (DE), filed on Feb. 8, 2016.
Prior Publication US 2019/0217422 A1, Jul. 18, 2019
Int. Cl. B23K 26/70 (2014.01); B23K 26/042 (2014.01); B29C 64/135 (2017.01); B29C 64/386 (2017.01); B23K 26/082 (2014.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B29C 64/153 (2017.01); G01J 1/42 (2006.01); B29C 64/268 (2017.01); G01J 1/04 (2006.01); B23K 26/03 (2006.01); B23K 26/342 (2014.01); B23K 26/06 (2014.01); B29C 67/00 (2017.01); G02B 26/10 (2006.01); G01J 1/02 (2006.01); B22F 10/28 (2021.01); B22F 12/44 (2021.01); B22F 12/49 (2021.01); B22F 12/90 (2021.01); B22F 10/31 (2021.01)
CPC B23K 26/705 (2015.10) [B22F 10/28 (2021.01); B22F 10/31 (2021.01); B22F 12/44 (2021.01); B22F 12/49 (2021.01); B22F 12/90 (2021.01); B23K 26/032 (2013.01); B23K 26/042 (2015.10); B23K 26/0648 (2013.01); B23K 26/082 (2015.10); B23K 26/342 (2015.10); B29C 64/135 (2017.08); B29C 64/153 (2017.08); B29C 64/268 (2017.08); B29C 64/386 (2017.08); B29C 67/00 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); G01J 1/0266 (2013.01); G01J 1/0411 (2013.01); G01J 1/0414 (2013.01); G01J 1/4228 (2013.01); G01J 1/4257 (2013.01); G02B 26/101 (2013.01); B22F 2999/00 (2013.01); G01J 2001/4261 (2013.01); Y02P 10/25 (2015.11)] 17 Claims
OG exemplary drawing
 
1. A method for measuring at least one beam datum in a system for the additive manufacturing of components by layered solidification of a powdery construction material with an energy beam, the system comprising a beam deflecting device including at least one scan mirror, a layer applicator, a component platform, and a processing plane with processing coordinates, the processing coordinates being locations of the powdery construction material to which the beam deflecting device can direct the beam for forming a beam focus for selective local solidification of the powdery construction material,
the method comprising the following step during the additive manufacturing process of a single component by selective laser melting:
a) applying, by means of the layer applicator, a new layer of the powdery construction material to the component platform on top of a previous layer of the powdery construction material, which has been previously applied onto the component platform and selectively solidified by means of the beam forming a beam focus in the processing plane,
wherein the method further comprises performing the following steps during the additive manufacturing process of the single component for a plurality of different selected ones of the processing coordinates:
b) positioning a beam barrier in a beam path between the beam deflecting device and at least a respective one of the plurality of different selected ones of the processing coordinates,
c) positioning a beam sampling module in the beam path between the beam deflecting device and at least the respective one of the plurality of different selected ones of the processing coordinates,
d) aligning the beam deflecting device with the respective one of the plurality of different selected ones of the processing coordinates,
e) turning on the beam for a limited period of time,
f) directing at least a portion of the beam aligned by the beam deflecting device in the direction of the respective one of the plurality of different selected ones of the processing coordinates to a measuring device with a radiation detector,
g) determining at least one respective beam datum by means of the measuring device, wherein the at least one respective beam datum is a deviation of the beam position within the processing plane from the respective one of the plurality of different selected ones of the processing coordinates,
wherein the positioning of the beam barrier and the positioning of the beam sampling module are coupled to the movement of the layer applicator,
wherein the beam barrier and the beam sampling module remain positioned, at least during steps e) and f) that are performed during step a), in accordance with steps b) and c) above the processing plane at a distance from the processing plane as well as in the beam path between the beam deflecting device and at least the respective one of the plurality of selected ones of the processing coordinates in the processing plane at the same time, the beam barrier preventing the beam from striking the processing plane, and
wherein the steps b) to g) are carried out during the additive manufacturing process of the single component in a period of time after the solidification of the previous layer of the component, such that during performing step a), and before solidification of the new layer, wherein the beam is sequentially aligned, by means of the beam deflecting device, with each of the plurality of different selected ones of the processing coordinates and the at least one respective beam datum is recorded at each of the plurality of different selected ones of the processing coordinates,
such that the at least one respective beam datum is individually measured for each of the plurality of different selected ones of the processing coordinates in the same period of time after the solidification of the previous layer of the component, and before solidification of the new layer.