EP2262634A2

EP2262634A2 - Method and device for producing a curved section made from composite material and resulting section

Info

Publication number: EP2262634A2
Application number: EP09722505A
Authority: EP
Inventors: Gilles Duqueine; Jérôme Aubry
Original assignee: Airbus SAS
Current assignee: Airbus SAS
Priority date: 2008-03-07
Filing date: 2009-03-05
Publication date: 2010-12-22
Also published as: WO2009115734A3; FR2928294A1; WO2009115734A2; CN102006986B; FR2928294B1; US20110086199A1; CN102006986A

Abstract

The invention relates to a method and device for producing a curved section made from composite material and to the resulting section (63), in which the section is made from at least one composite band (11) extending along a longitudinal axis. The band is formed by stacking at least two laps of unidirectional reinforcing fibres (4, 5, 6) disposed along particular orientations. The band is draped over a jig (34, 73) having an essentially elongated planar or substantially planar application face (36) with a determined configuration corresponding to that of the desired section and extending about a reference line, and the band is applied progressively and deformed simultaneously along the reference line, so that, in the part(s) having a non-zero radius of curvature, the fibres fan out progressively in the application plane.

Description

METHOD AND DEVICE FOR PRODUCING A CURVED PROFILE OF COMPOSITE MATERIAL, AND CORRESPONDING PROFILE

The present invention relates to a method for producing a profile of composite material having a configuration having at least a first portion having a non-zero radius of curvature, from at least one composite strip extending along a longitudinal axis.

It also relates to a device implementing such a method, and a corresponding composite material profile. It finds a particularly important but non-exclusive application in the field of manufacturing curved parts of high strength, for example in the field of aeronautics for the manufacture of aircraft cabin frames. But it can also be used in other areas that require great resistance to efforts, such as recreational and competitive sports.

Devices and methods for producing a curved profile made of composite material formed of impregnated reinforcing fibers, using wire-to-wire lay-up from robots which make it possible to obtain an adequate orientation of the fibers in order to optimize the resistance characteristics, are already known. Such wire-to-wire lay-up requires the use of complex machines such as wire placement machines, and thus has significant disadvantages related to the need for a very high accuracy and a high cost of manufacturing equipment. This results in expensive investments for low productivity and a result in the opening of the fan fibers during their placement which unfortunately does not allow a good homogeneity.

The present invention aims to provide a method, a device and a profile that better than those previously known to the requirements of the practice, in particular in that it makes it possible to obtain a profile made of composite material whose lay-up of unidirectional prepreg plies is perfectly homogeneous, at a low cost, and this through the realization of a preliminary band, not yet deformed, but which will then, once extended by curving, increase the mechanical performance of the final product significantly.

For this purpose the invention essentially proposes a method for producing a composite material profile having a configuration having at least a first portion having a non-zero radius of curvature, from at least one composite strip extending the along a longitudinal axis, characterized in that, the strip being formed by the stack of at least two layers of unidirectional reinforcing fibers arranged in orientations different from that of the longitudinal axis of the strip and between them, the plies being pre-impregnated with resin and pre-compacted with each other at a determined pressure and temperature, the strip is draped over a jig having a planar or substantially flat application face of generally elongate shape, of determined configuration corresponding to that of the desired profile and extending around a reference line, progressively applying the band and simultaneously deforming it along said reference line, so that one carries out on the part or parts having a radius of curvature not zero progressive blooming of the fibers in the plan of application.

This progressive expansion corresponds to an enlargement of the space separating two fibers of the same ply, in the transverse direction of the strip, the progressive deformation of the angular opening existing between two fibers being carried out homogeneously. and regular on the part having a non-zero radius of curvature of the strip.

By reference line is meant the general line followed by the longitudinal axis around which the template extends and therefore the corresponding profile in the plane.

Thanks to the combination, on the one hand, of the stack of webs with pre-impregnated cross-fibers and, on the other hand, of this progressive application while respecting the reference line, one obtains repetitively, reliably and practically Automatic or semi-automatic, this exceptional development that is favorable to the strength of the room once the latter solidified.

In advantageous embodiments, one and / or the other of the following provisions taken alone or in combination:

- The profile comprises at least a second portion having a non-zero radius of curvature; the first and second parts have different radii of curvature; the strip being wound on an unwinding roll, the strip is draped by unrolling said roll on the template while guiding it during its longitudinal displacement by guiding means with the same reference line as the template; a strip is draped in which the unidirectional fibers of at least two of the plies are symmetrical with respect to the axis of the strip;

the composite strip is formed from three superposed sheets and agglomerated by compacting one to the other; the parallel fibers of each of the plies form an angle with the axis of the band respectively of value: 90-a °, 90 °, 90 ° + a °; the respective angles are 90 ° -a and / or 90 ° -b and / or 90 ° + a and / or 90 ° + b;

- a and / or b is such that: 10 ° <a <80 °; the fibers are made of carbon and the resin an epoxy resin; the template has a cavity, to then form a profile of complementary shape, after punching of the band in the cavity, and before solidification;

the jig is in the form of a beam of rectangular or trapezoidal section, to form a profile in the form of a U-shaped beam after folding the edges of the strip on the lateral faces of the jig, and before solidification; at least two successive layers of said composite strips are produced; is superimposed and / or intercalated between two layers, in the longitudinal direction, at least one reinforcement ply of complementary unidirectional composite material whose reinforcing fibers are parallel to the axis.

The invention also proposes a device implementing the method as described above.

It also proposes a device for producing a composite material profile having a configuration having at least a first portion having a non-zero radius of curvature, from at least one composite strip extending along an axis. longitudinal, characterized in that the strip being formed of at least two layers of unidirectional reinforcing fibers arranged in orientations different from that of the longitudinal axis of the strip and between them, the sheets being pre-impregnated with resin and pre-compacted with one another at a determined pressure and temperature, the device comprises at least one composite web support, a template having a planar or substantially flat application face of generally elongated shape, of determined configuration corresponding to that of the desired profile and extending around a reference line, means of progressive draping of the strip on the template comprising means for gripping the support and for moving said support along said jig, means for pressurizing the lap by the support on the application face of the jig, means for guiding said support to generate a draping of the strip on the application face along said reference line, so that, on the part or parts having a non-zero radius of curvature, progressive blooming of the fibers in the plan of application.

In advantageous embodiments the profile has at least a second portion having a non-zero radius of curvature. Advantageously, the first and second parts have different radii of curvature.

Also advantageously the support comprises at least one unwinding roll and the guide means comprise two rails, flanges or guide grooves disposed on either side of the template, of the same reference line as the template.

In an advantageous embodiment, the device further comprises means for forming the composite strip comprising means for progressively applying said layers to one another, giving the parallel fibers of each of said layers a different orientation by relative to the radius (s) of curvature of the profile to be obtained and means of compaction with each other to ensure cohesion at a given pressure and temperature.

Advantageously, the pressure is between 0.5 and 5 bars absolute and the temperature is between 15 ° C. and 80 ^° C., for example 0.9 bar and 40 ^° C. Also advantageously, the means for forming the composite strip comprise more means for superposition of a third layer and progressive application of said third layer to agglomerate it by compacting with the others, the parallel fibers of each of said plies for example forming an angle with the axis of the band respectively of value: 90 ° -a °, 90 °, 90 ° + a °. In another advantageous embodiment the template is in the form of a cavity, and the device comprises means for punching the strip in the cavity to then form a complementary shape profile before solidification. Also advantageously the template is in the form of a rectangular or trapezoidal section beam, and the device comprises means for folding the edges of the strip on the lateral faces of the template to form a U-shaped beam profile before solidification.

The invention also provides a profile obtained with the method described above.

It also proposes a composite material profile having a configuration having a first portion having a non-zero radius of curvature, comprising at least one composite strip extending along a longitudinal axis, characterized in that the strip is formed by the stacking of at least two plies of unidirectional reinforcing fibers arranged in orientations different from that of the longitudinal axis of the strip and between them, the plies being pre-impregnated with resin and pre-compacted with each other at a determined pressure and temperature, the band being deformed according to said configuration, and having a progressive development of the fibers in the application plane by regular deformation of angular aperture obtained over the width of the strip.

Advantageously, the profile has at least a second portion having a non-zero radius of curvature.

Also advantageously the unidirectional fibers of two of the plies are symmetrical with respect to the axis of the strip for example with angles with respect to the axis of the strip of 90 ° -a and 90 ° + a, with a between 0 And 80 °, preferably 45 ° or 60 °.

The invention also relates to an aircraft cabin part obtained from a profile made according to the method as described above. The invention will be better understood on reading the embodiments described below by way of non-limiting examples.

The description refers to the accompanying drawings in which: Figure 1 shows composite strips formed of one, two or three plies of parallel reinforcement fibers pre-impregnated with resin in an orientation d and usable according to the invention.

Figure 2 is a top view in perspective showing the placement of webs as described with reference to Figure 1, superimposed, before compacting to ensure cohesion.

FIG. 3 shows the cutting of strips obtained from the windings of FIG. 2, usable according to the invention.

FIGS. 4A and 4B show, in plan view, curved strips obtained with two or three sheets superposed corresponding to the plies shown in FIG.

FIG. 4C illustrates in plan view, the progressive unfolding of fibers (here perpendicular to the longitudinal axis) by regular and increasing deformation of the angular aperture obtained over the length of the strip, as obtained with the invention.

Figure 5 is a partial perspective view of an embodiment of a device implementing the method according to the invention.

FIG. 6 shows the result before coating of a strip obtained with the device of FIG.

5. Figures 7 and 8 show the following steps of obtaining the profile according to one embodiment of the invention, by emptying a space between a sheet or sheet of draping and the curved strip obtained with the invention. Figure 9 is a partial perspective view in section, after reversal and insertion of the profile in a mold for solidification of the profile in a manner known in itself by pressurizing and vacuum cooking. Figures 10 and 11 show in perspective embodiments of profile or contoured section portion obtained with the invention.

Figures 12 and 13 show in perspective another embodiment of a profile device according to the invention, wherein the U or C profile is obtained by punching the curved pre-stretched strip. FIG. 1 schematically shows three rectangular plies 1, 2, 3 made of reinforcing fibers 4, 5, 6 arranged in orientations different from those of the longitudinal axis 7, 8, 9 of the ply concerned.

Each of these plies is pre-impregnated with resin, for example of the epoxy type, and will make it possible to construct a band that can be used according to the invention.

But any type of thermoset or thermoplastic resin is of course usable.

Examples of such bands have been shown at 10 and 11 in Figure 1.

They are formed by the stacking of two layers (strip 10) or three layers (strip 11). More specifically, the strip 10 is formed by the stacking of the plies 2 and 3 whose unidirectional fibers form with their respective axis as shown in the figure, an angle of 15 °, which gives a lattice structure 12 (or nest of bee).

The band 11 is obtained by the superposition of three layers, namely a superposition of the layers 1, 2 and 3 giving a structure 13 denser. More precisely, each of the strips 10 and 11 is thus formed by stacking the corresponding sheets of unidirectional reinforcing thread, which are therefore arranged in orientations different from those of the longitudinal axis of the band concerned, said sheets being pre-impregnated of resin and pre-compacted with each other at a predetermined pressure and temperature. These will depend on both the resin used, the fibers used and the strength and strength of the desired profile after solidification.

Advantageously, the compaction pressure may for example be of the order of 0.8 bar absolute, for example obtained by evacuation and plating of the plies one on the other in a corresponding chamber, but may also be obtained by pressure external in a press, or through a pressure roller at pressures up to 3, 4 or even 5 bar.

The determined temperature used for this multi-tableclack preparation is advantageously the ambient temperature which allows a good flexibility of the materials without fast solidification of the resins. But a cooler and / or higher temperature for practical reasons within the reach of the skilled person, is also possible.

FIG. 2 shows a means for producing a band used with the method according to the invention.

For this purpose, three identical unidirectional pre-impregnated strips 17, whose fibers 18 are located in the longitudinal direction, are wound around a rectangular support 16 successively, giving them different coating angles around the rectangular support 16. for example and as shown in the figure, angles of 30 °, 90 ° and 120 respectively. There is thus formed a ribbon of three superimposed sheets whose fiber angles are therefore arranged in orientations different from those of the axis of the support and who will be able to be compacted with each other, so as to obtain the ribbon 20 as shown in Figure 3, and which corresponds to one of the faces of the support 16.

From this ribbon it is possible to cut the strips 21 of multidirectional sheets of the type of the band 11 shown in FIG.

From the strips 10, 11, 21, thus comprising unidirectional reinforcing fibers arranged in orientations different from those of the longitudinal axis of the strip and between them, the strip is draped over a template as will be described hereinafter. after referring to Figures 5 or 12.

FIGS. 4A and 4B show the deformed strips 22 and 23 obtained according to the invention, the curved parts of the profile having progressive blooming of the fibers, as represented by way of illustration in FIG. 4C applied to a single ply 1 whose fibers are perpendicular to the axis 7 of the web in the application plane.

Thus, according to the invention, a regular or substantially regular deformation of the spacing separating two adjacent fibers, which progressively changes from a small value d, to a larger value d / _ on a flat surface, is observed.

The angle between two fibers, in particular adjacent ones, is conserved or substantially preserved, on the width of the strip, taking into account the blooming carried out in a regular manner as described above. If the curved part of the strip always has an identical radius of curvature (case of a circle) the distortion of the distances along the same line parallel to the reference line will be identical between two fibers initially separated, before curvature, of the same width.

If, on the other hand, the radius of curvature is variable, the deformation will then be variable in a mathematically homogeneous manner as a function of the variations of said radius of curvature on the corresponding parts.

Subsequently, the same reference numbers will be used to designate identical or similar elements.

FIG. 5 shows a device 30 according to a first embodiment of the invention, arranged to produce a U-shaped composite material profile having a curved shape with a non-zero radius of curvature, from a composite strip, for example the strip 11 formed of three superimposed 1,2,3 prepreg plies, which extends along its longitudinal axis 15 to obtain the curved strip 23. The device 30 comprises a support 31 of composite strip provided with a cylinder 32 , unwinder, on which was wound the strip 11 and perpendicular axis 33 to the longitudinal axis 15 of said strip. Motor means (not shown) allow the smooth running of this cylinder.

Furthermore, the device 30 comprises a template 34 formed of a curved parallelepipedic block 35 of complementary shape to the inner part of the U-shaped profile that one wishes to produce, said template having an application face 36, flat or substantially flat, of elongated general shape of determined configuration corresponding to that of the profile to be obtained. The device 30 further comprises means 37 for progressive draping of the strip on the template. These means comprise means 38 for gripping the support, for example constituted by an axis 39 supported on either side of the cylinder by two symmetrical, movable gantries 40, whose posts 41 comprise feet mounted on wheels 42 arranged to follow the curvature means 43 for guiding the support, which will be described below. The draping means 37 also comprise motor means, which may be identical to those mentioned above, allowing the roller to move along the template, and means 44 for pressurizing the sheet by the support on the face of the sheet. application 36, for example formed of a system with vertical springs to compensate for the gradual loss of thickness of the roll following the deposition of the strip on said face of the support.

The pressurizing means may also be a device allowing easy sliding of the horizontal portion of the frames 40, for example formed of soft friction rings on integral and parallel axes located along the poles

41 of support, because of the weight of the roll itself. It is thus exerted during the application of the strip on the template a pressure for example between 200g and 3kg, and advantageously 1kg, which will allow a good progressive blooming of the fibers in the application plane. The means 43 for guiding the support to generate the draping of the strip, comprise two rails and / or guide edges 45 adapted to cooperate with the wheels

42 feet of the roller support gantries, and presenting the same reference line as that of the template and / or profile.

In FIG. 5 as shown, the rails therefore have the same radii of curvature (fixed or variable) as the radius of curvature of the profile to be produced.

Other guide means can of course be used.

FIG. 6 shows the first phase of embodiment of the embodiment of the profile more particularly described here, the draping means having been removed after production thereof.

The strip 23 thus produced rests on the upper face 36 of the template 34, the edges 50 of the strip protruding laterally from this face, and will be brought to come down on the lateral faces 51 of the template.

To do this it is provided in the device more particularly described here, that the template and the guide means are based on a table 52 provided on its periphery 53 sealing means.

The device for configuring the desired definitive profile, in U, from the intermediate profile 23 above is more specifically described with reference to FIGS. 7 and 8.

FIG. 7 shows in perspective the strip 23 which rests on the template 34, itself integral with the table 52 whose edges 53 comprise grooves 54 provided with joints 55, which will make it possible to ensure a good watertightness of the fabric or waterproof tarpaulin 56,

(secured to a support frame 56) arranged to cover the table and the entire profile. FIG. 8 more particularly shows the plating of the lateral edges 50 of the profile by means of the vacuum drawing of the volume existing between the surface of the table 57 and the fabric 56.

Via a vacuum pump 58 connected to the surface of the table 59, is sucked so that little by little the fabric 56 comes to press the edges 50 of the profile on the template. Once the profile in its final formal configuration, it is then polymerized under pressure at high temperature in a known manner in itself.

To do this and for example, the profile is placed on a hollow template in a metal counter-mold having a silicone sheet, which is pressurized.

Inside the hollow template is then carried a water circulation at high temperature which, coordinated with the pressures exerted, allows to respect the previously defined cooking cycles.

Then at the end of the molding and baking phases, the part is switched to trimming and ultrasonic testing, to obtain the final profile 63 (see Figure 10) which will, for example, be used for the frame of a cabin aircraft.

FIG. 9 shows another embodiment envisaged to complete the fabrication of the definitive profile.

To do this the not yet solidified profile 60 is introduced into the counter mold 61 of complementary shape. A silicone core 62 is then placed in the profile, also of complementary shape to the desired profile, for example wood and then pressurized, for example by evacuating or by inflation of the core. Then the block 62 is removed (or not) before cooking under vacuum and under pressure as described above.

Here again a system integrated in the mold for heating, vacuum and pressure (not shown) is provided and known in itself.

According to one embodiment of the invention, it is possible to produce a second band, a third band, etc., which is superimposed on the first band before cooking, with the device described for dropping the first band possibly adjusted a little differently.

It is also possible, as shown in FIG. 11, to add unidirectional reinforcement strips 64 positioned on the lateral faces 65 or on the main face 66 of the U or parallelepiped profile, here again with a possible pre-compaction, followed by molding and baking.

Such reinforcing means are determined as a function of the stresses and resistances sought in the context of the use of the profile concerned and are deposited so as to be within the abilities of those skilled in the art, by lateral unwinding of ribbons for example from unidirectional coil of steering fiber parallel or not parallel to the reference line, adequate width, automatically or semi-automatically, the tapes being for example compressed by axis rollers vertical in the case of a deposit on the lateral edges of the U.

FIG. 12 and 13 show (partially) another embodiment of a device 70 according to the invention. It comprises means 71 for draping the band 72 of the type described with reference to FIG. 5, but this time on a female mold 73 provided with a recess 74 corresponding to the configuration of the desired profile, the template being in fact in the form of a cavity.

The device furthermore comprises (see FIG. 13) punching means 75 comprising a core 76, for example of semi-rigid material, of non-deformable section, or other, of a shape complementary to that of the recess 74, which when it will be applied on the band 72 will allow to obtain by punching the configuration of the U-shaped template before solidification.

We will now describe the realization of a U-shaped profile according to the embodiment of the invention more particularly described with reference to Figures 1 to 11.

From three unidirectional epoxy carbon sheets whose fibers are directed in the direction of the longitudinal axis of the strip, a semi-finished product is produced as indicated with reference to FIG. bands 21.

The orientations of the fibers are for example minus 45 °, (or minus 30 °), 90 °, (plus 30 ° or) plus 45 °.

The operation can be made from rolls comprising unidirectional sheets pre-impregnated semi-automated or automated. Pre-compaction before cutting strips to ensure cohesion and cutting to the desired widths, for example 150mm, is then performed (see Figure 3). The band 21 thus obtained is for example wound on the roll 32.

As indicated above, the principle is to achieve balanced progressive blooming without dissociation of the fibers with each other, which makes it possible to obtain performances, especially in resistance, which are particularly important on templates which, traditionally, being curved, required complex assemblies.

With reference to FIGS. 5, 6 and following, the roll 11 is then put in place on the unwinding device (support means and motors) of the strip.

21.

The unwinding system is in turn guided by the inner and outer guide rails 45, for example circular if the desired profile is in an arc.

The draping is then carried out progressively on the template for example wood or silicone of higher or lower hardness. The angular opening deformation of the multiaxial strip is then homogeneous, the unwinding taking place automatically or semi-automatically at a slow speed, for example 1 m per minute. A strip of the type shown in FIG. 4B is thus obtained with excellent expansion, which rests on the jig 34 (see FIG. 7). The frame 56 'provided with its expandable silicone sheet 56 is then placed in place to flatten the returns, ie the blanks 50 of the C or U profile on the template 34. With reference to FIG. creates the vacuum between the silicone cover 56 and the surface 57 of the table, which actually comes to press the edges 50 along the jig 34.

Then the draping having been correctly carried out, it is possible to add the unidirectional reinforcements on the edges and / or the top of the profile and the operations are optionally repeated to produce on the first profile obtained a second strip or a third strip so as to obtain a profile multi-band multi-axial composite with or without reinforcement.

The resulting profile, which is a semi-product is then solidified. To do this, it is placed in a mold provided with a cavity of complementary shape, (see FIG. 9), then a silicone core 62 is inserted into the product before putting all the pressure in order to press the profile against the walls. said mold pressurizing it, and then cooking under pressure or under vacuum in a manner known per se.

As goes without saying and as it follows from the foregoing, the present invention is not limited to the embodiments more particularly described. On the contrary, it embraces all the variants and in particular those in which the shape of the template, and therefore of the profile obtained, comprises several different radii of curvature, including in opposite directions.

Claims

A method for producing a composite material profile (63) having a configuration having at least a first portion having a non-zero radius of curvature from at least one composite strip (11) extending along of a longitudinal axis, characterized in that, the strip being formed by the stack of at least two layers of unidirectional reinforcing fibers (4, 5, 6) arranged in orientations different from that of the longitudinal axis of the web and between them, the webs being pre-impregnated with resin and pre-compacted with each other at a determined pressure and temperature, the web is draped over a template (34, 73) having an application face ( 36) of planar or substantially planar shape of elongated general shape, of determined configuration corresponding to that of the desired profile and extending around a reference line, progressively applying the band and deforming it simultaneously according to FIG. reference line, so that on the part or parts having a non-zero radius of curvature a progressive blooming of the fibers in the plane of application is achieved.

2. Method according to claim 1, characterized in that the profile comprises at least a second portion having a non-zero radius of curvature.

3. Method according to claim 2, characterized in that the first and the second parts have different radii of curvature.

4. Method according to any one of the preceding claims, characterized in that, the strip (11) being wound on a roll (32) unwinder, the strip is draped by unrolling said cylinder on the template (34) while guiding it during its longitudinal displacement by means (43) for guiding the same reference line as the template.

5. Method according to any one of the preceding claims, characterized in that one drapes a strip whose unidirectional fibers of at least two of the plies are symmetrical with respect to the axis of the strip.

6. Method according to claim 5, characterized in that the composite strip is formed from three superimposed sheets and agglomerated by compacting one to the other, the parallel fibers of each of the layers forming an angle with the axis of the band respectively of value: 90-a °, 90 °, 90 ° + a °.

7. Process according to claim 6, characterized in that a is such that: 10 ° <a <80 °.

8. Method according to any one of the preceding claims, characterized in that the fibers are carbon and the resin an epoxy resin.

9. Method according to any one of the preceding claims, characterized in that the template (73, 74) has a cavity (74), to then form a complementary shape profile, after punching the strip in the cavity, and before solidification.

10. Method according to any one of claims 1 to 8, characterized in that the template (34) is in the form of a rectangular section beam or trapezoidal, to form a U-shaped beam profile after folding the edges of the band on the lateral faces of the template, and before solidification.

11. A method according to any one of claims 9 and 10, characterized in that one carries out at least two successive layers of said composite strips.

12. Method according to any one of the preceding claims, characterized in that is superimposed and / or intercalated between two layers, in the longitudinal direction, at least one ply (64) of reinforcing complementary unidirectional composite material whose fibers of reinforcement are parallel to the axis.

Apparatus (30, 70) for producing a composite material profile having a configuration having at least a first portion having a non-zero radius of curvature from at least one composite strip (11) extending along a longitudinal axis (15), characterized in that the strip being formed of at least two plies (1, 2, 3) of unidirectional reinforcing fibers arranged in orientations different from that of the longitudinal axis of the web and between them, the webs being pre-impregnated with resin and pre-compacted with each other at a determined pressure and temperature, the device comprises at least one support (31) of composite web (11), a jig (34) having an application face

(36) planar or substantially planar of elongated general shape, of determined configuration corresponding to that of the desired profile and extending around a reference line, means (37) of progressive draping of the strip on the template comprising means (38) gripping the support and moving said support along said template, means (44) for pressurizing the sheet by the support on the application face of the template, means (43) for guiding said support to generate a draping of the strip on the application face according to said reference line, so that is achieved on the part or parts having a non-zero radius of curvature, a progressive blooming of the fibers in the application plane.

14. Device according to claim 13, characterized in that the template has at least a second portion having a non-zero radius of curvature.

15. Device according to claim 14, characterized in that the first and second parts have different radii of curvature.

16. Device according to any one of claims 13 to 15, characterized in that the support comprises at least one unwinding roll (32) and in that the guiding means comprise two rails, flanges or guide grooves (45) disposed of on both sides of the template, with the same reference line as the template.

17. Device according to any one of claims 13 to 16, characterized in that further comprises means for forming the composite strip comprising means for progressively applying said layers to one another giving the parallel fibers of each of said sheets a different orientation with respect to the radius (s) ) curvature of the profile to obtain and compaction means of one with the other to ensure cohesion at a pressure and a temperature determined.

18. Device according to claim 17, characterized in that the pressure is between 0.5 and 5 bar and the temperature is between 15 ° C and 80 ⁰ C.

19. Device according to any one of claims 13 to 18, characterized in that the means for forming the composite strip further comprise means for superposition of a third sheet and progressive application of said third sheet for the compacting with the others, the parallel fibers of each of said plies forming an angle with the axis of the band respectively value: 90 ° -a °, 90 °, 90 ° + a °.

20. Device according to any one of claims 13 to 19, characterized in that the template (73) is in the form of a cavity (74), and in that it comprises means for punching the strip in the cavity for then form a template of complementary shape, before solidification.

21. Device according to any one of claims 13 to 20, characterized in that the template (35) is in the form of a beam of rectangular or trapezoidal section, and in that it comprises means (56, 58, 59). folding of edges of the strip on the lateral faces of the template to form a profile in the form of a U-beam, before solidification.

22. Device according to any one of claims 13 to 20, characterized in that it comprises means for applying at least two successive layers of said composite strips on the template.

23. Device according to claim 22, characterized in that it comprises means for superposition on or between two layers of at least one band of unidirectional composite material complementary reinforcement.

24. Composite material profile having a configuration having a first portion having a non-zero radius of curvature, comprising at least one composite strip (11) extending along a longitudinal axis, characterized in that the strip is formed by stacking at least two plies (1, 2, 3) of unidirectional reinforcing fibers (4, 5, 6) arranged in orientations different from that of the longitudinal axis of the strip and between them, the plies being pre-impregnated with resin and pre-compacted with each other at a determined pressure and temperature, the band being deformed according to said configuration, and having a gradual development of the fibers in the application plane by regular deformation of the angular aperture obtained over the width of the strip.

25. Profile composite material according to claim 24, characterized in that the template has at least a second portion having a non-zero radius of curvature.

26. Profile according to any one of claims 24 and 25, characterized in that the unidirectional fibers of two of the plies are symmetrical with respect to the axis of the strip.

27. Profile according to any one of claims 24 to 26, characterized in that the composite strip comprises three layers superimposed and compacted by compacting one to the other, the parallel fibers of each of the layers forming an angle with the axis of the band respectively of value: 90 ° -a °, 90 °, 90 ° + a °.

28. Profile according to claim 27, characterized in that a is such that: 10 ° <a <80 °.

29. Profile according to any one of claims 24 to 28, characterized in that the fibers are carbon and the resin an epoxy resin.

Aircraft cabin part, characterized in that it is obtained from at least one profile made from the method according to any one of claims 1 to 12.