Abstract: A vibration dampening device for the manufacture by rotational friction welding of a turbomachine rotor including a first disc and a second disc each having a hub with an internal surface is provided. The device includes a first clamping device configured to be positioned coaxially to the hub of the first disc and having a pair of radially opposite jaws suited to come into contact with the internal surface of the hub of the first disc.

Abstract: A belt including notches alternating with bushings on its inside surface is arranged around a disk, so as to encase it and to squeeze its periphery, the bushings penetrating into slot necks designed to house blade roots, so as to apply an elastic tightening force on the teeth and prevent fatigue cracks from forming during inertial friction welding of the disk with other parts of the rotor, these cracks possibly appearing at fillet connections of the teeth to the central part of the disk. The belt is made from elastic polymer with good internal viscosity, and damping properties.

Abstract: A belt including notches alternating with bushings on its inside surface is arranged around a disk, so as to encase it and to squeeze its periphery, the bushings penetrating into slot necks designed to house blade roots, so as to apply an elastic tightening force on the teeth and prevent fatigue cracks from forming during inertial friction welding of the disk with other parts of the rotor, these cracks possibly appearing at fillet connections of the teeth to the central part of the disk. The belt is made from elastic polymer with good internal viscosity, and damping properties.

Abstract: The invention relates to a vibration dampening device (1) for the manufacture by rotational friction welding of a turbomachine rotor, said rotor comprising at least one first disc (2a) and a second disc (2b) each comprising a hub (3a, 3b) having an internal surface (4a, 4b), with the device (1) comprising at least one first clamping device (10a) configured to be positioned coaxially to the hub (3a) of the first disc (2a), comprising a pair of radially opposite jaws (11a) suited to come into contact with the internal surface (4a) of said hub (3a) of the first disc (2a).

Abstract: A turbomachine blade includes a metal alloy airfoil having a cavity closed off by a cover on a hollowed side, the cover providing aerodynamic continuity of the hollowed side and being bonded via an edge thereof to the rest of the airfoil by a weld bead. The weld bead emerges on the hollowed side and penetrates into the airfoil to a depth P at least equal to the thickness EC of the edge of the cover so as to provide continuity of material between the edge of the cover and the rest of the airfoil over a depth at least equal to the thickness EC of the edge of the cover. A process for manufacturing such a blade is also disclosed.

Abstract: A turbomachine blade includes a metal alloy airfoil having a cavity closed off by a cover on a hollowed side, the cover providing aerodynamic continuity of the hollowed side and being bonded via an edge thereof to the rest of the airfoil by a weld bead. The weld bead emerges on the hollowed side and penetrates into the airfoil to a depth P at least equal to the thickness EC of the edge of the cover so as to provide continuity of material between the edge of the cover and the rest of the airfoil over a depth at least equal to the thickness EC of the edge of the cover. A process for manufacturing such a blade is also disclosed.

Abstract: The invention provides a process for checking the bonding of the cellular core of a honeycomb to a skin, said process comprising the steps of: using a light source to illuminate a so-called illuminated zone on the free surface of the honeycomb so as to illuminate the interior of the cells opening out into said illuminated zone, and detecting the emergent light exiting the cells in a so-called observed zone. The minimum distance between said illuminated zone and said observed zone is denoted E and defines a direction D, the distance E being at least equal to the width L1 of the cell mouths measured in the direction D, so as to make it impossible for the illuminated zone and the observed zone to be simultaneously above the mouth of one and the same cell. The invention also provides an instrument for implementing the process.