Abstract: The invention relates to a method for manufacturing an inlet lip skin part according to a nominal definition comprising dimensions of the lip skin and associated tolerances, the method comprising the steps of: a) obtaining at least one blank from at least one metal sheet; b) deforming the at least one blank into an intermediate part; and c) machining a first surface of the intermediate part with a first machining path, said first machining path being independent of the real dimensions of the intermediate part, and being based on the nominal definition of the lip skin part, so as to obtain a semi-machined part, and d) machining a second surface of the semi-machined part with a second machining path, said second machining path being based on real dimensions of the semi-machined part and the nominal definition of the lip skin part.

Abstract: The invention relates to a method for manufacturing an inlet lip skin part according to a nominal definition comprising dimensions of the lip skin and associated tolerances, the method comprising the steps of: a) obtaining at least one blank from at least one metal sheet; b) deforming the at least one blank into an intermediate part; and c) machining a first surface of the intermediate part with a first machining path, said first machining path being independent of the real dimensions of the intermediate part, and being based on the nominal definition of the lip skin part, so as to obtain a semi-machined part, and d) machining a second surface of the semi-machined part with a second machining path, said second machining path being based on real dimensions of the semi-machined part and the nominal definition of the lip skin part.

Abstract: A process for manufacturing a metal part (10), is described said part extending in a first direction (Y) and having a section comprising a central member (14) and at least a first side member (16) extending in a second direction. The process comprises the following steps: supply of a metal blank (30); removing material from the blank so as to form an intermediate part (32) comprising the central member (14), a junction zone (12) and at least first (116) and second (118) intermediate side members, with a space (34) between the first and second intermediate side members; and hot forming (104) the intermediate part, including spreading the first and second intermediate side members apart by inserting a first punch (212) between said members.

Abstract: An acoustic treatment structure related to a leading edge onto which an aerodynamic stream flows, in particular at an air intake of an aircraft nacelle, includes—from the outside to the inside—at least one acoustically resistive substructure (30), at least one alveolar substructure including strips (32) of cells, arranged in a direction that is essentially perpendicular to the direction of flow of the aerodynamic stream, and at least one reflective layer (34). Each strip (32) includes a first part that insulates the strips from one another, called a support, with a U-shaped cross-section in the longitudinal direction, whose open surface that is opposite to the bottom of the U shape is flattened against the acoustically resistive substructure (30), and at least a second part, called partitioning, making it possible to partition the space that is delimited by the support and the acoustically resistive substructure (30) into cells.

Abstract: An acoustic treatment structure related to a leading edge onto which an aerodynamic stream flows, in particular at an air intake of an aircraft nacelle, includes—from the outside to the inside—at least one acoustically resistive substructure (30), at least one alveolar substructure including strips (32) of cells, arranged in a direction that is essentially perpendicular to the direction of flow of the aerodynamic stream, and at least one reflective layer (34). Each strip (32) includes a first part that insulates the strips from one another, called a support, with a U-shaped cross-section in the longitudinal direction, whose open surface that is opposite to the bottom of the U shape is flattened against the acoustically resistive substructure (30), and at least a second part, called partitioning, making it possible to partition the space that is delimited by the support and the acoustically resistive substructure (30) into cells.