FR3046565A1 - - Google Patents

Abstract

A method and apparatus for manufacturing a fiber gusset (34) for occupying hollow areas (35) in the manufacture of T-shaped segments of segments. Fiber strands are passed through (32) through a gusset matrix (20, 33) whose inner cross-section forms the negative of the outer shape of the fiber gusset (34) to be manufactured, and compresses the fiber strands (32) while placing them in temperature to freeze the shape of the fiber gusset (34).

Description

The invention relates to a method and a device for the manufacture of a fiber gusset as well as to a method and an apparatus for manufacturing a T-shaped part segment comprising a fiber gusset. Fiber gusset for occupying hollow areas in the manufacture of T-shaped part segments of a fiber reinforced composite material. The invention also relates to a method and an installation for manufacturing a T-shaped workpiece segment of a fiber-reinforced composite material, a previously-manufactured fiber gusset being used to occupy hollow areas.

Because of the particularly advantageous property of having, for a relatively low weight, a very high rigidity and resistance in at least one direction, the fiber reinforced composite parts are particularly well suited for a large number of applications. Thus, such fiber reinforced composite parts are increasingly used even for load-bearing structures in the field of automotive and aeronautic construction, for example to save fuel by reducing the total weight.

In a conventional injection process, a matrix material is injected into a fiber-based material and the matrix material is then cured to thereby obtain an integral piece form of the matrix material and the fiber-based material. The matrix material may for example be a resin as conventionally used for the manufacture of composite fiber reinforced parts. As regards the fiber-based material, it is possible, for example, to envisage carbon fibers, aramid fibers or glass fibers. The above-mentioned advantage concerning the stiffness and the direction-specific resistance of a fiber-reinforced composite part made of a fiber-reinforced composite material is also disadvantageous because, outside of said fiber direction, for example perpendicularly to fiber direction, strength and stiffness decrease considerably. Unlike isotropic materials, which have the same mechanical properties in almost all directions, it is necessary, with anisotropic materials, such as for example composite materials reinforced with fibers, particularly in the case of flat parts of large area to bring additional reinforcement elements, to be able to guarantee the necessary stability inside the plane of the flat piece of large surface, over the entire length.

Thus, for example in the manufacture of wing hulls for airliners, they are stiffened using stiffeners, so as to give the piece a stable shape over the entire span. Regarding the stiffeners, it is here reinforcing elements projecting from the plane of the part, which allows to expand the plane of the direction of the fibers.

Such stiffeners or stiffening elements are generally formed of two L-shaped workpiece elements, which are joined together by one of their respective wings. The other two bent L-shaped wings then form a common joint surface, so that such a stiffening element can then be assembled with these wings forming assembly surface to the surface to be rigidified.

For example, DE 10 2012 101 706 A1 discloses an installation which continuously deforms and shears a fiber-based or semi-finished material based on flat fibers so as to be able to manufacture chords or stiffeners for stiffening. hulls of wings.

In cross-section, the L-shaped stiffening elements joined to a large-area flat part, form a T-shaped part segment. However, since the L-shaped reinforcing elements can not be bent without any curvature, a corresponding radius of curvature appears in the bend zone which ultimately leads to a hollow zone or hollow space. This hollow space is here defined by the curvature of the first L-shaped reinforcing element, the curvature of the second L-shaped reinforcing element and the large-area flat element to be stiffened. This hollow zone thus formed, whose cross section varies with the wall thickness as well as with the radius of curvature of the stiffening elements, must be filled to ensure the necessary stability of the entire construction.

In practice, gussets are used for this purpose to seal the hollow areas in the assembled preform, so that it can not form resin accumulations, which would represent a zone of weakness in the composite part fiber reinforced. DE 10 2012 109 737 A1 discloses, for example, a gusset which can be introduced into the hollow space which is formed during the arrangement of stiffeners and ribs on large-sized piece shapes, and comprising furthermore an elastomeric material, so that the gusset is able to adapt to the shape of the hollow space or the cross section of the hollow space, due to its elastomeric material.

However, this has the disadvantage of introducing, with the elastomeric material, another property of material throughout the system. In addition, the elastomeric material does not fully compensate for all cross-sectional variations. From EP 2,006,074 A1 there is known a method and a device for the manufacture of shaped fiber-reinforced composite parts. A flat fiber material is at least partially bent. In this case, a gusset of fibers made of a fiber-based material having a fixed outer cross-section is manufactured using a gusset matrix. DE 10 2007 029 762 A1 discloses a method and a device for connecting a dry fiber web to a skein of dry fibers, a fiber web being unrolled from a web and being applied by a flat side. on a fiber-based material.

Accordingly, the object of the present invention is to provide a method and apparatus for manufacturing a gusset, which is preferably made of the same fiber-based material as the fiber-reinforced composite part, the method and the further preferably providing the possibility of varying the cross section of the gusset so as to be able to respond to corresponding cross-sectional variations of the hollow space, which arise from variations in the thickness of the workpiece.

This object is achieved by a method for producing a fiber gusset for occupying hollow areas during the manufacture of fiber reinforced composite parts made of a fiber reinforced composite material, the method comprising the following steps: preparing and supplying a plurality of unidirectional fiber strands, provided with a thermally activatable binder material; b) passing the unidirectional fiber strands through a gusset matrix, the inner cross-section of which forms the negative of the outer shape of the fiber gusset to be manufactured, and compressing, by means of the gusset matrix, the unidirectional fiber strands guided through the gusset matrix, and c) heating the fiber strands to thermally activate the binder material, in order to to freeze the outer shape of the fiber gusset, characterized in that during the manufacture of the fiber gusset, it is necessary to t vary the outer cross section of the fiber gusset by varying the inner cross section of the gusset matrix.

The goal is also achieved by means of a device for manufacturing a fiber gusset for occupying hollow areas during the manufacture of fiber-reinforced composite parts made of a fiber-reinforced composite material, the device having a system of preparation and supply, which is configured to prepare and deliver unidirectional fiber strands, and also having a gusset matrix whose inner cross section forms the negative of the outer shape of the fiber gusset to be manufactured, and cooperates with the preparation and supply so that the unidirectional fiber strands having been prepared can pass through the gusset matrix, the gusset matrix being configured to compress the unidirectional fiber strands passed therethrough, and the device having a heating element, configured for heating the fiber strands p for the thermal activation of a binder material of the fiber strands, for the purpose of freezing the outer shape of the fiber gusset, characterized in that the gusset matrix is designed so as to be able to vary its internal cross section when the manufacture of the fiber gusset.

Furthermore, the aim is also achieved by a method for manufacturing a T-shaped part segment made of a fiber-reinforced composite material, according to which a fiber gusset is placed in the space hollow formed in the bending zone of two L-shaped construction elements applied against each other, characterized in that a fiber gusset is continuously manufactured using the method according to one or several of the aforementioned developments of the process and is put in place, continuously, in the hollow space.

In addition, the aim is also achieved by an installation for the manufacture of a T-shaped part segment made of a fiber-reinforced composite material, characterized in that the installation comprises a device according to one or more the aforementioned developments of the device, and is configured to insert the fiber gusset made continuously into the hollow space formed in the curvature zone of two L-shaped building elements applied against each other.

According to the invention, there is claimed a method for producing a fiber gusset for occupying hollow areas during the manufacture of fiber-reinforced composite parts made of a fiber-reinforced composite material, in particular part-in-part segments. T-shaped as fiber reinforced composite parts. For this purpose, firstly, several strands of unidirectional fibers which are provided with a thermally activated binder material, or may be provided with them during the preparation, are prepared and supplied. Such unidirectional fiber strands may for example be wicks or rovings consisting of a large number of individual fibers, namely filaments. Now, it is intended to pass the unidirectional fiber strands through a gusset matrix, the inner cross section of the gusset matrix forming the negative of the outer shape of the fiber gusset to be manufactured. During the passage of the fiber strands through the gusset matrix, the fiber strands are on this occasion compressed by the gusset matrix and brought to a corresponding external shape, which corresponds to the internal cross section of the gusset matrix.

The fiber strands are on this occasion warmed up, so as to produce the thermal activation of the thermally activatable binder material, thereby freezing the outer shape of the gusset which has just been manufactured, when the material forming thermally activatable binder cools again. The heating of the fiber strands by means of a heating element can here be carried out before the gusset matrix with reference to the direction of transport, in the gusset matrix itself or after the gusset matrix, and it has been found to be advantageous for the heating element to be integrated in the gusset matrix, whereby the fiber strands are brought to temperature by the gusset matrix, by means of the heating element, when passing through the matrix of gusset. gusset.

Thus, fiber gussets having the appropriate shape of the hollow area to be filled can be manufactured directly from fiber-based materials used for the manufacture of fiber-reinforced composite parts, thus being exactly adapted to the concrete conditions. In addition, the method according to the invention allows the implementation directly during the manufacture of the fiber reinforced composite part, because the fiber gusset can be manufactured continuously and can thus, during the production of the piece fiber-reinforced composite, particularly in the forming and preforming stages, be integrated into the part, being manufactured on demand.

For the purposes of the present invention, the fiber gusset denotes, in particular, an elongated element intended to occupy hollow zones inside a fiber-reinforced composite part, and adapted to the corresponding cross-sectional shape of the hollow zone. For the purposes of the present invention, a fiber gusset is in particular an elongated element having a cross section of at least triangular shape. This concerns in particular an element used to occupy hollow areas during the manufacture of T-shaped part segments, to occupy in a controlled manner, in particular the hollow zone, most often of triangular cross-section, forming in the intersection zone. of the T-shaped workpiece segment to thereby prevent, during manufacture of such a T-shaped workpiece segment, resin buildup that can lead to areas of weakness in the composite workpiece fiber reinforced.

A thermally activatable binder material is here a material which is applied for example in powder form to the unidirectional fiber strands and is thermally activated by heating, thus releasing a binder property, by virtue of which the fiber-based material can be fixed in its shape. This happens for example by melting a plastic material, which upon cooling solidifies and then freezes the fiber gusset in its shape. According to an advantageous embodiment, the unidirectional fiber strands are prepared by applying a binder material to the fiber strands before passing them through the gusset matrix. It is advantageous here that the amount of the binder material applied to the fiber strands is selected so that the fiber gusset, after thermal activation of the binder material and then cooling of the binder material to freeze the shape of the gussets fiber, has an elastomeric property, so as to compensate for small flatness defects or deviations from an ideal shape in the hollow area. The fiber gusset has been fixed in its form by the thermally activated binder material, but is still, to a certain degree, deformable.

According to the invention, during manufacture of the fiber gusset, the outer cross-section of the fiber gusset is varied by varying the inner cross-section of the gusset matrix, thereby providing a cross section, i.e. an outer shape, varying over the entire length of the fiber gusset. This is particularly advantageous when the fiber-reinforced composite part to be manufactured, in particular the T-shaped part-segment, has, due to different room thicknesses, also variable hollow zones in cross-section, which must, however, be completely filled. by fiber-based material. By varying the inner cross section of the gusset matrix, the outer cross-section or outer shape of the fiber gusset can be enlarged or reduced, so that the fiber gusset can be exactly adapted to locally prevailing conditions. Here it is particularly advantageous that during manufacture of the fiber gusset, one or a portion of the fiber strands are cut before passing through the gusset matrix, by means of a cutting device, and that the transporting the severed fiber strands is stopped, so as to reduce the number of fiber strands that are passed through the gusset matrix, when decreasing the outer cross section of the fiber gusset by varying the cross-section interior of the gusset matrix. Prior to the gusset matrix, with reference to the transport direction, there is thus provided a cutting device, which cuts off a strand or a portion of the fiber strands which is passed through the gusset matrix, prior to the gusset matrix, so that the number of fiber strands passing through the gusset matrix is reduced. This makes it possible to reduce the size of the outer cross section or the outer shape of the fiber gusset, without increasing the fiber volume content by higher compaction.

In this measure it is particularly advantageous that during the manufacture of the fiber gusset, the transport of one or more strands of fibers which have been cut is restarted, and the strands are again passed through the gusset matrix. of restarted fibers, so as to increase the number of fiber strands passed through the gusset matrix when increasing the outer cross section of the fiber gusset by varying the inner cross section of the gusset matrix . This makes it possible to enlarge the size of the outer cross section or the external shape of the fiber gusset, while maintaining the same fiber content.

Moreover, the aim is also achieved by means of the device mentioned above, for the manufacture of a fiber gusset for occupying hollow areas during the manufacture of fiber-reinforced composite parts made of a fiber reinforced composite material. . The device includes a preparation and delivery system configured to prepare and provide unidirectional fiber strands. Furthermore, the device comprises a gusset matrix whose inner cross section forms the negative of the outer shape of the fiber gusset to be manufactured, and cooperates with the preparation and delivery system so as to be able to pass through the matrix of gusset the unidirectional fiber strands having been prepared. The gusset matrix is further configured to compress the unidirectional fiber strands passed therethrough to correspondingly form the fiber gusset. In addition, the device comprises a heating element configured to heat the fiber strands for the thermal activation of a fiber strand binder material, thereby freezing the outer shape of the fiber gusset.

According to the invention, the gusset matrix is designed so that its inner cross section can be varied during the manufacture of the fiber gusset. Advantageously, the gusset matrix has at least three frame members, which together form the inner cross section of the gusset matrix as a negative of the outer shape of the fiber gusset to be manufactured and the frame members are mounted, each with a front side adjacent to a neighboring frame member and slidable in the plane of the cross-section relative to the respectively adjacent frame member, for varying, ie enlarging or decreasing, the section; inner transverse of the gusset matrix.

Advantageously, there is provided a binder application system configured to apply a binder material to fiber strands prior to passing them through the gusset matrix.

In one embodiment, the heating element is part of the gusset matrix, for setting the fiber strands to temperature as they pass through the gusset matrix.

Advantageously, there is provided between the preparation and supply system and the gusset matrix a cutting device configured to cut off one or a portion of the fiber strands, the preparation and delivery system being configured to stop the transport of the fiber. or severed fiber strands to reduce the number of fiber strands passed through the gusset matrix when decreasing the outer cross section of the fiber gusset by varying the inner cross-section of the fiber gusset. gusset matrix. According to one embodiment, the preparation and delivery system is configured to start the transport of one or more strands of cut fibers, in order to increase the number of fiber strands passed through. through the gusset matrix when increasing the outer cross section of the fiber gusset by varying the inner cross section of the gusset matrix.

Furthermore, there is provided a method for manufacturing a T-shaped workpiece segment of a fiber-reinforced composite material, according to which a fiber gusset is set up in the hollow space formed in the area. curvature of two L-shaped elements applied against each other. In accordance with the invention, the fiber gusset is continuously manufactured in accordance with the aforementioned embodiments, and is placed in a continuous manner in the hollow space. The invention will be explained in more detail, by way of example, with reference to the appended figures. These show:

Figure 1 schematic representation of a T-shaped part segment;

Figure 2 schematic representation of a gusset matrix;

Figure 3 schematic representation of an installation for the manufacture of a fiber reinforced composite part.

Figure 1 shows a T-shaped part segment 10, which may for example be a reinforcement of flat parts. The T-shaped part segment 10 here comprises a flat base part 11 to which two L-shaped elements 12 and 13 are joined. The two L-shaped elements 12 and 13 are assembled together. respectively by one 14a and 15a of their wings, so that the L-shaped projection wings 14b of the first L-shaped member, and 15b of the second L-shaped member, provide a continuous joining surface, through which the two L-shaped elements 12 and 13 can then be connected to the flat base part 11.

Between the bend zone 14c of the first L-shaped element, the bend zone 15c of the second L-shaped element 13, and the flat base part 11, it appears, due to the curvature of the elements in the form of L 12 and 13, a hollow zone 16 whose cross section, in particular the size thereof, depends on the workpiece thickness of the L-shaped elements 12 and 13. The greater the workpiece thickness of the elements in the form of L 12 and 13 is important, the larger is also the hollow zone 16 which results.

In the manufacture of fiber-reinforced composite parts, this hollow zone 16 must be filled with a material, to avoid resin accumulations in the hollow zone 16, which could then lead to weak spots in the fiber-reinforced composite part 10.

FIG. 2 schematically shows a gusset matrix 20 making it possible, according to the invention, to fabricate a fiber gusset by passing fiber strands through the gusset matrix 20. FIG. 2 shows the gusset matrix 20 in FIG. front view, that is to say that the passage of fiber strands is effected out of the observation plane of the figure.

The gusset matrix 20 has an inner cross-section 21, which forms the negative of the outer shape of the fiber gusset to be manufactured. In the embodiment of Figure 2, the inner cross section 21 is triangular, which allows to manufacture a triangular fiber gusset. This inner cross-section 21, which in the first place is configured as a passageway through which the fiber strands can be passed, is formed by three frame members 22, 23 and 24, which are adjacent, each by one of its front sides. to a neighboring frame member and are respectively mounted thereon.

According to the invention, the gusset matrix is configured so that the first frame member 22 is supported by one of its front sides 22a against the second adjacent frame member 23, while the front side 23a of the second frame member frame member 23 bears against the third frame member 24 whose front side 24a in turn rests against the first frame member 22. This results in a closed ring of frame members, mutually connected and in contact with each other. reciprocal via a front side of each of them, so that a hollow space is formed therein which forms the passage of the gusset matrix 20 thereby defining the inner cross-section 21 .

The frame members 22, 23 and 24 are slidably mounted, each with its front side 22a, 23a and 24a, on the respective adjacent frame member, which is shown by the arrows of the gusset die on the side. left of the figure. The frame members are here slidably mounted in the plane of the inner cross-section 21, so that sliding of the frame members 22, 23 and 24 makes it possible to vary the inner cross-section 21.

In FIG. 2 is shown, on the right side, a gusset matrix 20 for which the frame members 22, 23 and 24 have each been slidably displaced relative to their adjacent frame member, which has led to a larger surface area. of the inner cross-section 21. If the frame members 22, 23 and 24 are slid inwardly towards the inner cross-section 21, the surface of the inner cross-section 21 decreases.

It thus becomes possible to manufacture a gusset of fibers with a variable cross section, which makes it possible to fill, by complementarity of shapes, hollow zones of variable cross section. Such variable hollow zones appear, for example, when T-shaped part segments are manufactured, in which the thickness of the part varies over the entire length, which also varies the inside diameter of the inscribed circle of the hollow zone. . Using the variable gusset matrix, the fiber gusset may be fabricated so that the outer shape of the gusset of fibers varies correspondingly to the variation of the inscribed circle inner diameter of the hollow zone.

Figure 3 shows an installation 30 which has a preparation and delivery system 31 with which unidirectional fiber strands 32 are prepared and supplied. The unidirectional fiber strands are then fed to the gusset matrix 33, configured for example as shown in FIG. 2. The passage of the fiber strands 32 through the gusset matrix 33 leads to the manufacture of a fiber gusset 34 of stable shape, which is then introduced continuously, in the hollow zone 35 formed between two L-shaped piece segments 36. With the aid of a pressure roller 37, the fiber gusset 34 can be pressed within the hollow zone 35 of the L-shaped part segments 36.

In order to vary the outer shape of the fiber gusset 34 by varying the inner cross-section of the gusset matrix 33, a cutting device 38 is provided before the gusset matrix 33, with reference to the direction of transport. which, in the event of a decrease in the inner cross-section of the gusset matrix 33, appropriately cuts fiber strands 32, and their transport towards the gusset matrix 33 is then stopped. The number of fiber strands that are fed to the gusset matrix 33 is thus reduced, thereby causing the volume of fibers in the fiber gusset to adjust to the decreased interior cross-section.

The gusset matrix 33 finally comprises a heating element 39 by means of which the fiber strands are put in temperature as they pass through the gusset matrix 33, which produces the activation of a binder material which can be activated thermally, so as to freeze the shape of the fiber gusset 34 manufactured.

Thus, not only can the L-shaped part segments 36 be manufactured continuously, but also during the same process step, simultaneously manufacture the fiber gusset, adapting it to the corresponding shape of the zone. hollow formed by the two L-shaped part segments 36, and simultaneously, during the same process step, inserting it into said hollow zone, thus allowing, especially during the mass production of such part segments , significantly increase efficiency. The production times of an element can thus be significantly reduced.

Nomenclature of landmarks:

10 T-shaped Part Segment 11 Flat Base Part

12 first L-shaped element

13 second L-shaped element 14a, 15a first wing of the L-shaped elements 14b, 15b second wing of the L-shaped elements 14c, 15c bending zone of the L-shaped elements 16 hollow zone 20 gusset matrix 21 section internal cross-section of the gusset matrix 22,23,24 gusset matrix frame members 22a, 23a, 24a front sides of the frame members, support 30 installation 31 preparation and supply system 32 fiber strands 33 gusset 34 fiber gusset 35 hollow area

36 L-shaped workpiece segments 37 pressure roller 38 cutting device 39 heating element

Claims (13)

Claims: A method for manufacturing a fiber gusset (34) for occupying hollow areas (16, 35) in the manufacture of fiber reinforced composite parts made of a fiber reinforced composite material, the method comprising the following steps d) preparing and supplying a plurality of unidirectional fiber strands (32) provided with a thermally activatable binder material; e) passing the unidirectional fiber strands (32) through a gusset matrix (20, 33); ), whose inner cross-section (21) forms the negative of the outer shape of the fiber gusset (34) to be manufactured, and compressing, by means of the gusset matrix (20, 33), the fiber strands (32) unidirectional guided through the gusset matrix (20, 33), and f) heating the fiber strands (32) to thermally activate the binder material, to freeze the outer shape of the fiber gusset (34), characterized in that In the manufacture of the fiber gusset (34), the outer cross section of the fiber gusset (34) is varied by varying the inner cross section (21) of the gusset matrix (20, 33). Method according to claim 1, characterized in that the unidirectional fiber strands (32) are prepared by applying a binder material to the fiber strands (32) before passing them through the gusset matrix (20, 33). 3. Method according to claim 1 or claim 2, characterized in that the fiber strands (32) are heated by a heating element of the gusset matrix (20, 33), during the passage through the matrix of gusset (20, 33). 4. Method according to one of the preceding claims, characterized in that during manufacture of the fiber gusset (34), one or a portion of the fiber strands (32) are cut before passing through the gusset matrix (20, 33) by means of a cutting device (38), and the transport of the severed fiber strands (32) is stopped, in order to reduce the number of fiber strands (32) passed through through the gusset matrix (20, 33) when the outer cross section of the fiber gusset (34) is decreased by varying the inner cross-section (21) of the gusset matrix (20, 33). 5. Method according to claim 4, characterized in that during the manufacture of the fiber gusset (34), the transport of one or more strands of fibers (32) having been cut, is started to increase the number of fiber strands (32) passed through the gusset matrix (20, 33), when increasing the outer cross section of the fiber gusset (34) by varying the inner cross-section (21) ) of the gusset matrix (20, 33). A device for manufacturing a fiber gusset (34) for occupying hollow areas (16, 35) in the manufacture of fiber reinforced composite parts made of a fiber reinforced composite material, the device having a preparation and delivery device (31), which is configured to prepare and supply unidirectional fiber strands (32), and also having a gusset matrix (20, 33) whose inner cross-section (21) forms the negative of the shape outer surface of the fiber gusset (34) to be manufactured, and cooperates with the preparation and delivery system (31) so that the unidirectional fiber strands (32) having been prepared can pass through the gusset matrix (20, 33). ), the gusset matrix (20, 33) being configured to compress the unidirectional fiber strands (32) passed therethrough, and the device having a heating element (39) configured for tempering ature of the fiber strands (32) for the thermal activation of a binder material of the fiber strands (32), for the purpose of freezing the outer shape of the fiber gusset (34), characterized in that the gusset matrix (20, 33) is adapted to vary its inner cross-section (21) during manufacture of the fiber gusset (34). 7. Device according to claim 6, characterized in that there is provided a binder application system, configured to apply a binder material on the fiber strands (32) before passing them through the gusset matrix (20, 33). 8. Device according to claim 6 or 7, characterized in that the heating element (39) is part of the gusset matrix (20, 33) for heating the fiber strands (32) during their transition to through the gusset matrix (20, 33). 9. Device according to one of claims 6 to 8, characterized in that the gusset matrix (20, 33) has at least three frame members (22, 23, 24), which together form the inner cross-section (21). ) of the gusset matrix (20, 33) as a negative of the outer shape of the fiber gusset (34) to be manufactured, the frame members (22, 23, 24) being mounted, each with a front side (22a). , 23a, 24a) adjacent a neighboring frame member (22, 23, 24) and slidable in the plane of the cross-section relative to the respective adjacent frame member (22, 23, 24), for vary the inner cross section (21) of the gusset matrix (20, 33). 10. Device according to one of claims 6 to 9, characterized in that between the preparation and supply system (31) and the gusset matrix (20, 33) is provided a cutting device (38), configured for severing one or more strands of fibers (32), the preparation and delivery system (31) being configured to stop transporting the one or more cut fiber strands (32) to thereby reduce the number of fiber strands (32) being passed through the gusset matrix (20,33) when decreasing the outer cross section of the fiber gusset (34) by varying the inner cross-section (21) of the gusset matrix (20, 33). 11. Device according to claim 10, characterized in that the preparation and supply system (31) is configured to start the transport of a strand or several strands of fibers (32) sectioned, in order to increase the number of fiber strands (32) passed through the gusset matrix (20, 33) as the outer cross-section of the fiber gusset (34) is increased by varying the inner cross-section (21) of the gusset matrix (20, 33). A method for manufacturing a T-shaped workpiece segment (10) of a fiber-reinforced composite material, according to which a fiber gusset (34) is positioned in the hollow space formed in the curvature zone of two L-shaped building elements (12, 13) applied against each other, characterized in that a fiber gusset (34) is continuously manufactured using the method according to one of claims 1 to 5 and it is put in place, continuously, in the hollow space. 13. Installation (30) for manufacturing a T-shaped piece segment (10) of a fiber-reinforced composite material, characterized in that the installation (30) comprises a device according to one of the claims 6 11, and is configured to insert the continuously formed fiber gusset (34) into the hollow space formed in the bend zone of two L-shaped building members (12, 13) applied against each other. other.