US 12,263,526 B2
Method for the generative production of a three-dimensional component
Pierre Foret, Munich (DE)
Assigned to Messer Industries USA, Inc., New Castle, DE (US)
Filed by Messer Industries USA, Inc., Bridgewater, NJ (US)
Filed on Oct. 6, 2017, as Appl. No. 15/726,468.
Claims priority of application No. 10 2016 012 116.5 (DE), filed on Oct. 10, 2016.
Prior Publication US 2018/0128803 A1, May 10, 2018
Int. Cl. B22F 10/28 (2021.01); B22F 10/32 (2021.01); B22F 12/90 (2021.01); B23K 26/12 (2014.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 40/00 (2020.01); G01N 33/00 (2006.01)
CPC B22F 10/28 (2021.01) [B22F 10/32 (2021.01); B22F 12/90 (2021.01); B23K 26/125 (2013.01); B33Y 40/00 (2014.12); G01N 33/0075 (2013.01); B22F 2201/11 (2013.01); B22F 2999/00 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); Y02P 10/25 (2015.11)] 8 Claims
OG exemplary drawing
 
1. A method for the generative production of a three-dimensional component in a processing chamber, comprising:
providing a metal starting material in the processing chamber;
melting the metal starting material by inputting energy from a laser to the metal starting material;
providing a process gas stream in the processing chamber;
extracting a portion of the process gas stream from the processing chamber at a location in the processing chamber of the melting and level with a plane on which a most recently deposited one of the metal starting material is located for at least a portion of the process gas stream flowing through the metal starting material and past where the metal starting material is melted;
generating a constant atmosphere during the generative production on a top layer of the three-dimensional component with the process gas stream;
determining an oxygen content of the portion from the extracting of the process gas stream by providing a first oxygen sensor and a second oxygen sensor, the first oxygen sensor having a faster response time to the oxygen content of the portion of the process gas stream extracted from the location depending on the three-dimensional component to be produced, wherein the oxygen content of the process gas stream determined with the second oxygen sensor is unaffected by and independent of other constituents of the process gas stream and returning the portion extracted of the process gas stream to the processing chamber and diverting another portion of the portion to not return to the processing chamber.