US 11,746,705 B2
Method for manufacturing an acoustic element of a sound absorption structure from at least one sheet of material
Wolfgang Brochard, Carbonne (FR); Laurent Cazeaux, Toulouse (FR); and Claire Maffre, Lias (FR)
Assigned to Airbus Operations S.A.S.
Filed by Airbus Operations S.A.S., Toulouse (FR)
Filed on Nov. 13, 2019, as Appl. No. 16/682,271.
Claims priority of application No. 18 71984 (FR), filed on Nov. 28, 2018.
Prior Publication US 2020/0165975 A1, May 28, 2020
Int. Cl. F02C 7/24 (2006.01); B64D 29/00 (2006.01); G10K 11/168 (2006.01)
CPC F02C 7/24 (2013.01) [B64D 29/00 (2013.01); G10K 11/168 (2013.01); F05D 2260/96 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for manufacturing an acoustic element of a sound absorption structure comprising at least one chamber having a cylindrical, conical or truncated conical shape, wherein the method comprises:
cutting at least one preform out of a plate or sheet of material;
shaping the preform by rolling;
assembling two side edges of the preform to obtain the cylindrical, conical or truncated conical shape of the chamber; and
cutting at least one series of slits in the flat preform, before the shaping said preform.