US 11,872,617 B2
Manufacture of annular sectors for producing an air intake lip
Fabienne Quenu, Moissy-Cramayel (FR); Vincent Dutot, Moissy-Cramayel (FR); Bertrand Pierre Martin Leroyer, Moissy-Cramayel (FR); and François Taillard, Moissy-Cramayel (FR)
Assigned to SAFRAN NACELLES, Gonfreville l'Orcher (FR)
Appl. No. 18/248,814
Filed by SAFRAN NACELLES, Gonfreville l'Orcher (FR)
PCT Filed Oct. 20, 2021, PCT No. PCT/FR2021/051832
§ 371(c)(1), (2) Date Apr. 12, 2023,
PCT Pub. No. WO2022/084628, PCT Pub. Date Apr. 28, 2022.
Claims priority of application No. 2010781 (FR), filed on Oct. 21, 2020.
Prior Publication US 2023/0302520 A1, Sep. 28, 2023
Int. Cl. B21D 26/033 (2011.01); B21D 51/10 (2006.01); F02C 7/04 (2006.01); B23P 11/00 (2006.01); B21D 26/047 (2011.01); B21D 53/92 (2006.01)
CPC B21D 26/033 (2013.01) [B21D 26/047 (2013.01); B21D 51/10 (2013.01); B21D 53/92 (2013.01); B23P 11/00 (2013.01); F02C 7/04 (2013.01); B23P 2700/01 (2013.01); F05D 2230/60 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for manufacturing annular sectors of an air intake lip comprising:
arranging a revolution-shaped blank facing a three-dimensional forming surface of a die of a hydroforming tool, the three-dimensional surface comprising at least two plunging cavities spaced from each other along a circumferential direction,
forming an air intake lip preform in one piece by hydroforming the revolution-shaped blank on the three-dimensional surface of the die, the air intake lip preform having in section a U-shape and comprising a plurality of crenellated portions each delimited by a respective one of the plunging cavities,
producing a plurality of cutouts in the air intake lip preform so as to divide said preform into a plurality of annular sectors, each cutout comprising removal of a sacrificial portion at a level of a respective one of the crenellated portions so as to form two adjacent assembly edges with one of the two adjacent assembly edges including a plunging.