Safran Aircraft Engines

Snecma

Sylvain Corradini

Richard Mathon

Jean-François Durand

Timothee Elisseeff

Hubert Jean Marie Fabre

Antoine Phelippeau

Jérémy Hellot

Bertrand Pierre Martin Leroyer

Sophie Essayan

Timothée Elisseeff

A fiber texture presents the shape of a strip extending in a longitudinal direction over a determined length between a proximal portion and a distal portion, and in a lateral direction over a determined width between first and second lateral edges. The fiber texture presents three-dimensional or multilayer weaving. The proximal portion of the fiber texture includes an end portion extending in the lateral direction so as to be set back from at least one of the first and second lateral edges and over a determined width that is less than the width of the fiber texture. The end portion projects in the longitudinal direction from at least one longitudinal edge of the fiber texture, the end portion extending in the longitudinal direction between a first end connected to the fiber texture and a free, second end opposite from the first end.

Fiber texture for fabricating an aeroengine casing

Method (S) for protecting against fire a fan casing () comprising a roughly cylindrical barrel () having a main direction extending along a longitudinal axis (X) and an upstream flange () extending radially with respect to the longitudinal axis (X) from an upstream end of the barrel (), the fan casing () being made of a composite comprising a fibrous reinforcement densified by a matrix, said matrix being polymerized, the protection method(S) comprising the following steps:&#x22c5;&#x2014;laying (SI) widths containing glass fibre pre-impregnated with a resin capable of affording the fan casing with thermal protection against fire on an upstream radial face () of the upstream flange (), and &#x22c5;&#x2014;polymerizing (S) the resin in order to obtain a protective layer ().

Fire protection of a fan casing made of composite

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 method for manufacturing a turbomachine casing from composite material including: creating a semi-rigid protective layer from dry glass fibers that protects against galvanic corrosion, arranging the protective layer on a profiled mandrel by applying the protective layer against the annular radial flange thereof, forming and densifying the fibrous reinforcement on the mandrel while covering the protective layer.

Method for manufacturing a turbomachine casing from a composite material and associated casing

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 winding machine for winding a fiber texture onto an impregnation mandrel, includes: a take-up mandrel for storing and unwinding a fiber texture, the take-up mandrel having a substantially horizontal axis of rotation; an impregnation mandrel for receiving superposed layers of the fiber texture unwound from the take-up mandrel, the impregnation mandrel having an axis of rotation that is substantially horizontal and parallel to the axis of rotation of the take-up mandrel; a camera directed towards the fiber texture and the impregnation mandrel to examine the passage of warp tracer yarns and weft tracer yarns present in the fiber texture; an image-analysis module for determining the positions of the intersections of warp tracer yarns with the successive weft tracer yarns and comparing these determined positions with corresponding positions for the intersections of reference warp and weft tracer yarns, and determining an offset value for the fiber texture for each of these intersections; electric motors for driving the mandrels in rotation about their respective axes of rotation; and a control unit for controlling the electric motors for driving rotation of the mandrels.

Growing community of inventors

Moissy-Cramayel, France

Sylvain Corradini