Snecma

Safran Aircraft Engines

Safran

Richard Mathon

Antoine Phelippeau

Jean-François Durand

Dominique Michel Serge Magnaudeix

Olivier Patrigeon

Micah Gummel

Sylvain Corradini

Yann Marchal

Dominique Magnaudeix

Raoul Jaussaud

Bertrand Pierre Martin Leroyer

Matthieu Arnaud Gimat

Franck Bernard Leon Varin

Olivier Foussard

Louis Bettega

Claire Rousseau

Franck Bernard Léon Varin

Erwan Camus

Noemie Souhaite

Franck Bernard Varin

Matthieu Gimat

Dominique Michel Magnaudeix

Jean-Francois Durand

Noémie Souhaite

A guiding device for guiding a fiber texture on an impregnation mandrel of a winding machine, the device including a first radial spacer for placing facing a first cheekplate of the impregnation mandrel, a second radial spacer for placing facing a second cheekplate of the impregnation mandrel, and a cross-member suitable for supporting the first and second spacers, the cross-member including an adjustment system for adjusting the positions of the first and second spacers and suitable for positioning the first and second spacers apart respectively from the first and second cheekplates of the impregnation mandrel so as to hold a first portion of fiber texture that extends along the first cheekplate pressed against the first cheekplate, and a second portion fiber texture that extends along the second cheekplate pressed against the second cheekplate, without blocking rotation of the impregnation mandrel.

Device for guiding a fiber texture on an impregnation mandrel, and an associated impregnation mandrel and winding machine

A device for applying abradable material to a surface of an annular casing of a turbine engine, wherein the casing extends along a longitudinal axis, comprises a support equipped with first guiding means capable of guiding the support in relation to the casing in a radial direction in relation to the axis of the casing. The support is equipped with second guiding means capable of guiding the support in relation to the casing in an axial direction. The device further includes an application roller pivotally mounted in relation to the support in the axial direction and adjustment means allowing adjustment of the position of the roller in relation to the first guiding means, in the radial direction.

Device for applying abradable material to a surface of a turbine engine casing

Jacquard loom for producing a woven preform from several warp yarns and several weft yarns, the loom including a device for taking up the preform when it is being produced, in order to move it along an axis (X) as it is being formed, which axis is substantially parallel to a production direction for the preform, characterised in that the loom also includes a control for rotating the preform, substantially about the axis.

Preform take-up in a jacquard loom

A method of shaping the profile of a fan casing having an inside surface, the method including placing the casing around a surface of revolution of a drum of shaping tooling; interposing at least one bladder that is inflatable under the action of a fluid under pressure between a portion of the inside surface of the casing and the drum, the bladder extending over all or part of the surface of revolution of the drum; stoving the assembly including the casing, the tooling, and the at least one bladder at a predetermined temperature; and during the stoving, applying isostatic pressure via the at least one bladder so as to impart a cylindrical profile to the portion of the inside surface of the casing facing the at least one bladder.

Method and tooling for shaping a fan casing

A mold for use in fabricating a gas turbine fan casing out of composite material includes a mandrel for having wound thereon a fiber preform of a fan casing and an annular wall with an outside surface of profile corresponding to the profile of the inside surface of the casing that is to be fabricated and of two lateral rims of profiles corresponding to the profiles of outer flanges of the casing that is to be fabricated; a plurality of mold cover angular sectors that are assembled in leaktight manner on the mandrel and that are to close the mold and to compact the fiber preform wound on the mandrel; and a plurality of locking keys configured to lock together in leaktight manner neighboring mold cover sectors. A method of closing such a mold, and a method of fabricating a fan casing are included.

Mold for fabricating a turbine fan casing out of composite material, and a method of closing such a mold

A method of measuring the thickness of a fiber texture wound on an impregnation mandrel for fabricating an annular structural part of a turbine engine out of composite material, the method including, prior to winding the fiber texture, acquiring a reference distance between an outside surface of the impregnation mandrel and a distance sensor positioned facing the outside surface of the impregnation mandrel, while winding the fiber texture, acquiring at least one real distance between the distance sensor and the outside surface of the fiber texture wound on the impregnation mandrel, and calculating the real thickness of the fiber texture wound on the impregnation mandrel by subtracting the real distance from the reference distance.

Method of measuring the thickness of a fiber texture wound onto an impregnation mandrel, and a winder machine implementing such a method

A cutting table for cutting out a fiber preform obtained by three-dimensional weaving and having two portions that are connected together by at least one zone of non-interlinking and that present outlines of different shapes, includes a tabletop provided with a recess for receiving one of the portions of the fiber preform to be cut out. The fiber preform is capable of laying flat in the access. The cutting table further includes sacrificial plates for interposing between the portions of the fiber preform for cutting out and for being fastened to the tabletop. The sacrificial plates are capable of covering partially the recess of the tabletop while being fastened to the tabletop. The cutting table also includes a cutting template configured to be pressed against a portion of the fiber preform that is positioned outside of the recess, and a device for applying compacting pressure against the cutting template.

Cutting table for cutting a fiber preform obtained by three-dimensional weaving, and a cutting method using such a table

A method for forming a preform for a hollow turbomachine component is provided. The method includes positioning a sheet made of woven fibers on a base equipped with a longitudinal impression; positioning a mandrel in the longitudinal impression to clamp the sheet between the base and the mandrel, the mandrel having a thickness that increases between a proximal end and a distal end; locking the distal end of the mandrel into position; placing a proximal block resting on the base; forming two flaps of the sheet around the flanks of the mandrel; resting two lateral blocks on the base on either side of the mandrel; locking the lateral blocks into position to form an assembly; drying the assembly to form a preform including a flat base, from which two flaps extend perpendicularly; and adjusting the flaps to the dimensions of the mandrel by trimming excess material.

Method for producing preforms

A device for holding a fiber texture on an impregnation mandrel of a winding machine, the device including a cross-member forming a support having each of its ends for fastening on one of cheekplates of the mandrel, a central pad carrier mounted on the cross-member and including a pad for pressing against a fiber texture layer wound on the mandrel, two lateral pad carriers mounted on the cross-member and each including a main pad for pressing against the fiber texture layer wound on the mandrel and a lateral pad for pressing against a lateral margin of the fiber texture layer wound on the mandrel, and a mechanism exerting a clamping force urging the pads against the fiber texture layer wound on the mandrel.

Device for holding a fiber texture on an impregnation mandrel of a winding machine

A method of placing a fastener plate on a structure made of composite material, the structure being obtained by a technique of injecting resin under a vacuum, the technique including placing a fiber preform in a closed mold, injecting a thermosetting resin into the mold, and polymerizing the resin prior to cooling. The method includes mounting a metal fastener plate against a wall of the mold before putting the fiber preform into place, the fastener plate coming into contact with one of faces of the fiber preform while the fiber preform is being put into place in the mold, and the resin becoming deposited between the fastener plate and the fiber preform while the resin is being injected into the mold. The method may be used in particular for fastening equipment on a composite material fan casing of a gas turbine for an aeroengine.

Method and system for attaching a piece of equipment to a structure made from composite material

A machine for weaving or winding a fiber preform on a mandrel having an axis of rotation that is substantially horizontal and that serves to receive the preform, the machine having a plurality of cameras pointing towards the underside of the fiber preform in order to scan the hidden face of the fiber preform and acquire images of the hidden face; an image analysis module for processing these images of the hidden face of the fiber preform in a plurality of adjacent scan windows, and for extracting weaving patterns therefrom and comparing them with reference weaving patterns previously stored in the module; a motor for driving the mandrel in rotation about its axis of rotation; and a control unit for stopping rotation of the mandrel if the result of the comparison reveals a difference of appearance between the two weaving patterns.

Machine for weaving or winding a fiber texture and enabling anomalies to be inspected by image analysis

A pressure-maintenance device for a resin injection system including an injection network connected to an injection mould, includes a pressurisation device adapted to inject a pressurised gas into a channelling; a first connector adapted to be connected to the resin injection network and adapted to be connected to the channelling; a second connector adapted to be connected to the injection mould of the injection system; the first connector being connected to the second connector by a pressure-maintenance channelling adapted to receive the gas injected under pressure.

Pressure-maintenance device for producing composite parts by resin injection and associated method

A method for manufacturing a thick turbine engine part in a composite material by injection of resin under pressure. A fiber preform is positioned in a mold, a resin composition is injected into the mold, the resin composition is polymerized in the mold so as to obtain the part, and the part is removed from the mold. Prior to the injection of the resin composition, a mold release shim is inserted between the fibrous preform and a wall of the mold, and between the polymerization of the resin composition and the removal of the part from the mold, the mold release shim is extracted.

Method for manufacturing a turbine engine part by injection of resin under pressure

A propeller blade, which can belong to a fan without covering by an external casing, includes two portions fitted into one another and of different materials, generally composite, to resist various stresses, heating coming from a rotor or impacts of solid bodies. An internal portion includes a blade core, a blade shank and possibly a foam lining, and a preform of an outside portion is assembled to it by surrounding it closely before being completely formed by receiving its resin, which is placed into polymerization. A method for producing the propeller blade guarantees good assembly of the portions without defects of form, damage or deformation of a fiber weave.

Method for producing a propeller blade from a composite material

An impregnation mandrel for production of gas turbine casings made from composite material, the mandrel including: an annular wall with a profile of an outer surface that corresponds to that of an internal surface of the casing to be produced; two side plates, with profiles that correspond to those of external casing flanges to be produced; and a removable device for clamping a layer having a fibrous texture, which is wound around the mandrel.

Growing community of inventors

Brunoy, France

Richard Mathon