US 11,925,986 B2
Method for manufacturing a blade comprising a bathtub tip integrating a small wall
Matthieu Jean Luc Vollebregt, Asnieres sur Seine (FR); Coralie Guerard, Colombes (FR); and Patrick Emilien Paul Emile Huchin, Tessancourt sur Aubette (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 15/741,146
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Jun. 27, 2016, PCT No. PCT/FR2016/051580
§ 371(c)(1), (2) Date Dec. 29, 2017,
PCT Pub. No. WO2017/001751, PCT Pub. Date Jan. 5, 2017.
Claims priority of application No. 15 56065 (FR), filed on Jun. 29, 2015.
Prior Publication US 2018/0193920 A1, Jul. 12, 2018
Int. Cl. B22F 5/04 (2006.01); B22F 3/24 (2006.01); B22F 5/00 (2006.01); B22F 10/25 (2021.01); B22F 10/66 (2021.01); B23H 9/10 (2006.01); B23P 15/02 (2006.01); B29C 64/153 (2017.01); B33Y 10/00 (2015.01); B33Y 80/00 (2015.01); F01D 5/20 (2006.01)
CPC B22F 5/04 (2013.01) [B22F 10/25 (2021.01); B22F 10/66 (2021.01); B23P 15/02 (2013.01); B29C 64/153 (2017.08); F01D 5/20 (2013.01); B22F 2003/247 (2013.01); B22F 2005/005 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); B23H 9/10 (2013.01); B33Y 10/00 (2014.12); B33Y 80/00 (2014.12); F05D 2230/31 (2013.01); F05D 2240/307 (2013.01); Y02P 10/25 (2015.11); Y02T 50/60 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for manufacturing a turbine engine blade, the turbine engine blade extending along a spanwise direction and including a bathtub tip portion having an active-surface wall, a passive-surface wall spaced from the active-surface wall, and a closing wall grouping together the active-surface wall and passive-surface wall, the active- and passive-surface walls each extending beyond the closing wall to respective top edges, the bathtub tip portion having a bathtub tip shape, the method comprising:
a moulding step implementing a removable core, the removeable core defining after removal a full extent of the bathtub tip portion, including the respective top edges of the active- and passive-surface walls,
after moulding of the bathtub tip portion, a step of adding metal to the closing wall at the bottom of the bathtub tip portion with an additive manufacturing method adding metal, by depositing metal powder on the closing wall, to form an inner partition supported by the closing wall, the inner partition having an extremity joining the top edge of the active-surface wall and another extremity joining the top edge of the passive-surface wall, and
a machining step, for machining the deposited metal powder to carryout shape finishing of the inner partition, the machining step occurring after the step of adding metal.