Abstract: A process for manufacturing a blade made of composite material for a turbomachine is provided. The blade includes an airfoil having a pressure side and a suction side which extend from a leading edge to a trailing edge of the airfoil. The blade further includes a metal sheath that extends along the leading edge of the airfoil. The process includes the steps of: a) placing a preform, made by three-dimensionally weaving fibers, in a mold, a polymerizable adhesive being inserted between the sheath and the edge of the preform; and b) injecting polymerizable resin into the mold to impregnate the preform so as to form the airfoil after solidifying, wherein the resin is injected within a time interval during which the adhesive reaches a freezing point.

Abstract: An optical device that is intended for laser treatment of internal surfaces of a covering part of the leading-edge type, including a collimator that is intended to be connected to a laser source via an optical fibre to produce a laser beam having a collimated and flat spatial pulse profile, a cylindrical lens that is configured to focus the laser beam along a spatial line that is transverse to the propagation of the laser beam thus forming a line-laser-beam, a reflecting optical component that is configured to be able to be introduced into the interior of the covering part and to uniformly reflect the line-laser-beam onto at least one internal surface of the covering part and in directions of incidence that are almost normal to at least one internal surface.

Abstract: A method for manufacturing a part made from composite material includes the steps of: applying, to a tool, layers of prepreg composite material for constituting a preform; installing a cover on the preform and sealingly connecting this cover to the tool with sealant; applying a vacuum to the enclosure delimited by the cover and the tool containing the preform; and heating the assembly to a given temperature for a predetermined time period in order to polymerise the layers of prepreg composite material. Also, a step of applying at least one silicone patch to geometrically complex zones of the tool and/or the preform may be performed before installing the cover. The cover may include at least one polyimide and/or at least one compound from the phthalonitrile family.

Abstract: An optical device that is intended for laser treatment of internal surfaces of a covering part of the leading-edge type, including a collimator that is intended to be connected to a laser source via an optical fibre to produce a laser beam having a collimated and flat spatial pulse profile, a cylindrical lens that is configured to focus the laser beam along a spatial line that is transverse to the propagation of the laser beam thus forming a line-laser-beam, a reflecting optical component that is configured to be able to be introduced into the interior of the covering part and to uniformly reflect the line-laser-beam onto at least one internal surface of the covering part and in directions of incidence that are almost normal to at least one internal surface.