US 12,435,729 B2
Method for manufacturing a compressor impeller for a turbomachine
Rainer Thomas, Moissy-Cramayel (FR); Laurent Pierre Tarnowski, Moissy-Cramayel (FR); Mathieu Laurent Herran, Moissy-Cramayel (FR); and Ludovic André Joël Naudot, Moissy-Cramayel (FR)
Assigned to SAFRAN HELICOPTER ENGINES, Bordes (FR)
Appl. No. 17/432,382
Filed by SAFRAN HELICOPTER ENGINES, Bordes (FR)
PCT Filed Feb. 18, 2020, PCT No. PCT/FR2020/050295
§ 371(c)(1), (2) Date Aug. 19, 2021,
PCT Pub. No. WO2020/169918, PCT Pub. Date Aug. 27, 2020.
Claims priority of application No. 19 01794 (FR), filed on Feb. 22, 2019.
Prior Publication US 2022/0134426 A1, May 5, 2022
Int. Cl. F04D 29/28 (2006.01); B22F 5/04 (2006.01); B22F 7/08 (2006.01); B22F 10/25 (2021.01); B22F 10/50 (2021.01); B22F 12/53 (2021.01); B23K 26/342 (2014.01); B23K 101/00 (2006.01); B33Y 10/00 (2015.01); B33Y 80/00 (2015.01)
CPC F04D 29/284 (2013.01) [B22F 5/04 (2013.01); B22F 7/08 (2013.01); B22F 10/25 (2021.01); B22F 10/50 (2021.01); B22F 12/53 (2021.01); B23K 26/342 (2015.10); B23K 2101/001 (2018.08); B33Y 10/00 (2014.12); B33Y 80/00 (2014.12); F05D 2230/22 (2013.01); F05D 2230/31 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for manufacturing a centrifugal or mixed impeller, or an axial wheel of a compressor comprising a hub carrying blades, comprising:
providing a hub devoid of blades or comprising blade bases;
performing a first localised material addition with a nozzle according to a direct metal deposition (DMD) additive manufacturing process to form at least a portion of a first blade on the hub;
performing at least one relative rotation of the hub relative to the nozzle;
performing a second localised material addition with the DMD additive manufacturing process to form at least a portion of a second blade on the hub; and
performing at least one of machining and polishing between the performing the first localised material addition and the performing the second localised material addition,
wherein at least one of the performing the first localised material addition and the second localised material addition includes adding material to at least one of the first blade and the second blade which differs from a constituent material of the at least one of the first blade and the second blade, and
wherein at least one of the performing the first localised material addition and the second localised material addition includes adding material at a leading edge of at least one of the first blade and the second blade that is harder than the constituent material of the at least one of the first blade and the second blade.