US 12,257,626 B2
Devices, systems, and methods for calibrating and maintaining a temperature of materials in an additive manufacturing build chamber
Tomas Lock, Laholm (SE); and Björn Löfving, Kärna (SE)
Assigned to Arcam AB, Mölnlycke (SE)
Filed by ARCAM AB, Mölnlycke (SE)
Filed on Jun. 15, 2021, as Appl. No. 17/348,312.
Prior Publication US 2022/0395904 A1, Dec. 15, 2022
Int. Cl. B22F 10/31 (2021.01); B22F 10/80 (2021.01); B22F 12/41 (2021.01); B23K 15/00 (2006.01); B33Y 30/00 (2015.01); B33Y 50/00 (2015.01); G01J 5/00 (2022.01); G01J 5/20 (2006.01); G01N 25/02 (2006.01); G01N 25/04 (2006.01); G01N 25/72 (2006.01)
CPC B22F 10/31 (2021.01) [B22F 10/80 (2021.01); B22F 12/41 (2021.01); B23K 15/0013 (2013.01); B23K 15/0026 (2013.01); B23K 15/0086 (2013.01); B33Y 30/00 (2014.12); B33Y 50/00 (2014.12); G01J 5/0003 (2013.01); G01J 5/20 (2013.01); G01N 25/02 (2013.01); G01N 25/04 (2013.01); G01N 25/72 (2013.01); G01J 2005/202 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A calibration system for an electron beam additive manufacturing system comprising one or more electron beam guns, the calibration system comprising:
an optical pyrometer positioned to capture thermal radiation emitted from raw material disposed on a surface within a build chamber of the electron beam additive manufacturing system; and
an analysis component communicatively coupled to the optical pyrometer and programmed to:
receive first thermal data corresponding to the thermal radiation of a first target area of raw material after the first target area has been heated to a predetermined melting temperature associated with the raw material and at least until the first target area solidifies at a predetermined phase transition temperature associated with the raw material,
determine one or more calibration parameters from the first thermal data and the predetermined phase transition temperature,
transmit one or more instructions to the optical pyrometer in accordance with the one or more calibration parameters, and
identify foreign material within the raw material based on the first thermal data indicating that the at least one of a melting temperature or a phase transition temperature deviates a threshold amount from at least one of the predetermined melting temperature or the predetermined phase transition temperature.