Method and system for producing a fiber preform and method for producing a fiber composite component

Abstract

Method for producing a fiber preform (1) from a fiber material of a fiber composite material, wherein a fiber composite component is to be produced from the fiber preform (1) by curing a matrix material of the fiber composite material embedding the fiber material of the fiber preform (1), wherein the method comprises the following steps: - depositing a plurality of fiber webs (3) onto a tool by means of a fiber laying head of a fiber laying system, wherein a single fiber web (3) is formed by one or more web- or strip-shaped fiber semi-finished products which can be deposited by means of the fiber laying head, - wherein the fiber webs (3) are laid in layers on top of each other and next to each other in a fiber layer (2), - wherein in at least one predetermined reinforcement region (4) of the fiber preform (1) several additional fiber layers (5) are formed by laying down additional fiber webs (6), - wherein the additional fiber layers (5) are laid down in the reinforcement region (4) by means of the fiber laying head in such a way that the extent of at least one additional fiber layer (5) orthogonal to the fiber direction of the fiber semi-finished products corresponds to a multiple of the fiber web width of the fiber webs (6) of the respective additional fiber layer (5), characterized in that - in an edge region of the at least one reinforcement region (4), the semi-finished fiber products of at least one additional fiber layer (5) are deposited beyond the reinforcement region (4) without these semi-finished fiber products deposited beyond the reinforcement region (4) being cut in the edge region in the longitudinal direction, and - wherein a first additional fiber layer (5) which was laid down in front of a second additional fiber layer (5) with the same fiber direction has a larger or smaller extent orthogonal to the fiber direction than the second additional fiber layer (5) and / or - wherein a second additional fiber layer (5), which was laid down after a first additional fiber layer (5), is laid offset with respect to the first additional fiber layer (5), so that the second additional fiber layer (5) projects at least partially beyond a layer edge of the first additional fiber layer (5).

Description

The invention relates to a method for producing a fiber preform from a fiber material of a fiber composite material according to the preamble of claim 1. The invention also relates to the production of a fiber composite component from such a produced fiber preform by curing a matrix material embedding a fiber material of the fiber preform according to the preamble of claim 6.Due to their particular weight-specific strength and rigidity, fiber composite components are suitable in particular for lightweight construction. When producing such a fiber composite component from a fiber composite material, a matrix material embedding the fiber material of the fiber composite material is cured, so that the fiber material and the matrix material form an integral unit. As a result, the load-bearing fibers of the fiber material are forced in their desired and predetermined direction in order to be able to correspondingly remove the loads occurring.A fiber composite material in the sense of the present invention accordingly comprises a fiber material and a matrix material in order to produce the fiber composite component by curing the matrix material embedding the fiber material. It is conceivable that the fiber composite material is provided in such a way that before the production of the fiber preform, fiber material and matrix material are present separately and thus the fiber preform is produced from "dry" fiber material. However, it is also conceivable for the matrix material to be already prepregged into the fiber material (so-called prepregs), so that the fiber preform is then produced from such prepregs.Before the matrix material embedding the fiber material cures, a fiber preform is first produced with the aid of a tool, in that the fiber material is deposited on or in a tool. The tool has a shape which generally corresponds to the negative shape of at least one side of the component to be produced. The fiber preform in the sense of the present invention is thus a precursor of the component to be produced later, wherein the matrix material is not yet cured in this precursor. The fiber preform can be made of dry or prepreg fiber materials. If dry fiber materials have been used, after the production of the fiber preform, the matrix material is infused into the fiber material and subsequently cured usually under temperature and pressure.For the production of large fiber composite components, such as wing shells of commercial aircraft, it has been known for some time to automate the fiber placement on the tool. For this purpose, a fiber laying head is mounted as end effector on an automatic movement machine, for example a gantry installation or an articulated arm robot, to which semi-finished fiber products in the form of a web, band or strip can be fed continuously. With the aid of the automatic movement device, the fiber laying head is then moved with respect to the tool and in the process deposits the semi-finished fiber products on the tool in the form of a web. Such a system is known, for example, from DE 10 2010 015 027 B1.With the automated fiber placement, semi-finished fiber products in the form of webs or strips can be placed in such a way that individual fiber webs can be placed with the aid of the fiber placement head. In the case of the "Automated Fiber Placement" (AFP), a plurality of narrow fiber semi-finished strips are laid next to one another with the fiber laying head, these narrow fiber semi-finished strips also being called "Towns". These may be prepreg (prepreg) or dry fibers provided with a thermoplastic binder. As a rule, all the watches can be cut individually and individual watches can be switched on or off. It is thus possible to image predefined contours.In automated tape laying (ATL), a wide semi-finished fibre tape (tape) is laid down. Customary tape widths are 150 to 300 mm. Depending on the construction of the laying head, the tape can be cut either only perpendicularly to the laying direction or else up to a specific angle to the laying direction.A fiber web in the sense of the present invention is a web of fiber material of a fiber composite material, which can be laid or is laid in one process step without interruption, settling or stopping of the laying head (in one piece) with the aid of a fiber laying head. In the case of "automated fiber placement", a plurality of different towns are laid down simultaneously, depending on the fiber laying head, so that here a fiber web consists of a plurality of individual towns (semi-finished fiber products).If large fiber composite components, such as wing shells or the like, are now produced with the aid of the automated fiber placement, the fiber preform is built up in layers in the tool. Each fiber layer generally has a plurality of individual fiber webs which are laid one after the other with the aid of the fiber laying head. After the deposition of a fiber layer, the next fiber layer is then deposited onto the previously laid fiber layer, optionally by changing the fiber direction. The fiber directions differ here with respect to a reference direction usually by 0° fiber direction, 90° fiber direction and +45° and -45° fiber direction. However, the variation of the fiber angle of successive fiber layers cannot always be implemented in practice, since there is usually a higher proportion of a preferred fiber orientation in the main load direction, in which particularly many individual layers are proportionally situated.It does not rarely happen that at certain load application points or at special points which are exposed to a particularly high load, thickenings of the fiber preform are necessary, within which the number of fiber layers which are laid one above the other is increased, in contrast to the rest of the fiber preform. For example, in the case of a manufactured leafshell fiber preform having a size of about 15 m 2 and a length of 8 m, the base laminate is produced from 58 continuous individual fiber plies. By inserting additional reinforcement layers, regions with up to 159 individual layers are produced, wherein the transitions between the different laminate regions are configured in a ramp-like manner. The ramp-like formation of the transitions from the base laminate to the reinforcing regions is necessary in this case because the fiber laying head requires a corresponding angle when depositing the fiber webs in order to deposit beyond the reinforcing region. Moreover, the ramps are also required from a structural point of view in order to avoid abrupt jumps in rigidity in the component.Although this allows very targeted reinforcement of those regions in which increased load input is also to be expected later without configuring the entire component as such to be oversized. This saves material and manufacturing costs. However, the reinforcing regions in which the number of fiber layers is increased by additional fiber layers must be designed with very precise contours in order to form the corresponding ramp. As a result, in practice it is very often necessary to shut off individual towns in the edge regions of the reinforcement regions during laying and thus to vary the fiber web width or, if appropriate, to cut the semi-finished fiber products, which is time-consuming. This is because the fiber laying head must be stopped for this purpose, the semi-finished fiber product must be cut and the fiber laying head then re-fitted, whereby the production time and thus the costs in the production of such components are increased. The usual ramp geometry thus leads, for the reasons mentioned, to the situation in which the technically possible deposition rate of automated fiber laying technologies cannot be exploited.EP 3 272 488 A1 discloses a method and a device for producing a fiber composite component which has additional fiber material in an edge region or in which dense fiber strands are used for reinforcement.EP 1 977 882 A1 describes a method for producing fiber composite components, wherein the individual rovings can be laid running parallel, convergently or divergently with respect to one another.WO 2016 / 092438 A1 discloses the production of a fiber composite component with reinforcement regions in which the fiber material is deposited directly one above the other.WO 2016 / 087806 A1 likewise discloses the production of a fiber composite component in which the reinforcement fiber strips are arranged locally on a component one above the other.DE 10 2016 210 835 A1 discloses the use of additional fiber material layers in the production of a fiber composite component, wherein the additional fiber material layers are arranged one above the other.It is therefore the object of the present invention to specify an improved method and a device for producing a fiber preform from semi-finished fiber products which can be deposited in web or strip form in order nevertheless to enable rapid and cost-effective fiber deposition despite thickening regions or reinforcing regions within the fiber preform.The object is achieved according to the invention by the method for producing a fiber preform according to claim 1, a method for producing a fiber composite component from such a fiber preform according to claim 6 and a fiber laying plant according to claim 7.Claim 1 proposes a method for producing a fiber preform from a fiber material of a fiber composite material, wherein a fiber composite material is to be produced on the fiber preform by curing a matrix material of the fiber composite material embedding the fiber material of the fiber preform. The fiber preform is accordingly formed generically from a fiber material of a fiber composite material, wherein the fiber material can be dry fiber material or already preimpregnated fiber material (prepregs). The fiber preform is produced according to the invention in such a way that the fiber material is introduced into a mold or deposited there, so that it receives its later component geometry at least in parts by the mold.In the proposed method according to the invention, a plurality of fiber webs are now laid on a tool by means of a fiber laying head of a fiber laying installation, wherein individual fiber webs are formed by one or more web- or strip-shaped fiber semi-finished products which can be laid parallel and simultaneously with the aid of the fiber laying head of the fiber laying installation. With the aid of the fiber laying head of the fiber laying installation, fiber webs of Towns or tapes can thus be laid in the tool in an automated manner.In order to build up the fiber preform, the fiber webs are laid layer by layer one above the other and next to one another in a fiber layer, so that a fiber layer is formed from a plurality of fiber webs, wherein, depending on the semi-finished fiber product, a fiber web can be formed from a plurality of semi-finished fiber products. If a fiber layer is laid down by laying down a plurality of parallel fiber webs, the next fiber layer can be formed by laying down fiber webs onto the already laid-down fiber webs or onto the already laid-down fiber layer. It is advantageous if a first fiber layer is formed by semi-finished fiber products having a first fiber direction or fiber orientation, while a second fiber layer lying above it, i.e. laid directly onto the first fiber layer, is formed from semi-finished fiber products having a second fiber direction or fiber orientation, wherein the first fiber direction is different from the second fiber direction. Preferably, the directions differ between 45° and 90°, wherein fiber orientations of 0°, 90° and +45° and -45° are most frequently found in practice with respect to an absolute system (with respect to the mold tool). However, a fiber orientation change cannot always be realized.Furthermore, in at least one predefined thickening section or reinforcing section or reinforcing region of the fiber preform, a plurality of additional fiber layers are formed by depositing additional fiber webs whose semi-finished fibers do not extend over the entire fiber preform in the fiber direction. These additional fiber layers of the reinforcing region thus have a locally limited extent which is predetermined by the extent of the reinforcing region. These fiber layers thus do not extend in their extension over the entire fiber preform and thus do not form part of the so-called base laminate, the fiber layers of which extend over the entire fiber preform and thus over the entire component.According to the invention, it is now provided that the additional fiber layers are laid down in the reinforcing region by means of the fiber laying head in such a way that the extent of at least one additional fiber layer orthogonally to the fiber direction or fiber orientation of the semi-finished fiber product corresponds to a multiple of the fiber web width of the fiber webs of the additional fiber layer.This can achieve the effect that entire fiber webs are deposited in the reinforcement regions without the corresponding fiber webs having to be cut in the edge regions of the reinforcement regions during the deposition of the semi-finished fiber products. As a result, the laying time during the production of the fiber preform can be significantly shortened, as a result of which the production costs can be reduced.Furthermore, the inventors have recognized here that, despite the lack of direct cutting of the fiber webs in the reinforcing region, a corresponding ramp can nevertheless be realized in these edge regions in particular, such that the fiber laying head can also place the semi-finished fiber products in this reinforcing region accordingly in the next process step when placing the fiber layer lying thereon.With the aid of the present invention, cutting of the semi-finished fiber products along the fiber orientation can thus be avoided. A blank at the end of each fiber web is furthermore also necessary so that the fiber laying head can move to its new depositing position. However, edge contour treatment along the semi-finished fiber products by cutting the semi-finished fiber products or by switching on or off individual semi-finished fiber products of the fiber web is no longer necessary.It is advantageous if the fiber web width of a fiber web to be laid down in an additional fiber layer is identical across all fiber webs of this additional fiber layer, so that, in particular when Towns are laid down, no fiber semi-finished products need to be switched on or off dynamically. Rather, in a single additional fiber layer, the fiber web width is identical over all laid-down fiber webs of this additional fiber layer.In a preferred embodiment for this purpose, all the fiber webs of the entire fiber preform, i.e. both the additional fiber layers in the reinforcing regions and the fiber layers of the base laminate, have the same fiber web width.In a further advantageous embodiment, all additional fiber layers are deposited in a single thickening section in such a way that the extent of each additional fiber layer orthogonal to the fiber direction of the semi-finished fiber products corresponds to a multiple of the fiber web width of the fiber webs of the respective additional fiber layer. As a result, all additional fiber layers are deposited in such a way that they correspond to a multiple of the fiber web width of their fiber webs, so that the trimming of the fiber semi-finished products or the switching on or off of individual fiber semi-finished products is dispensed with for each additional fiber layer.Advantageously, the fiber web width of a fiber web is the sum of the fiber semi-finished product width of the individual web- or strip-shaped fiber semi-finished products, since the fiber web is deposited from the individual fiber semi-finished products. It is conceivable in all cases that the fiber web width is furthermore given plus a predefined gap between two fiber webs, so that the fiber web width can also be slightly greater overall than the sum of the individual fiber semi-finished product widths.In a further advantageous embodiment, at least one complete fiber layer, the semi-finished fiber products of which extend in the fiber direction over the entire fiber preform (fiber layers of the base laminate), is deposited onto one, several or all additional fiber layers of a reinforcement region. Thus, the additional fiber layers within the reinforcing region are braided into the fiber layers of the base laminate, which are likewise a component of the reinforcing region, so that fiber layers of the base laminate alternate in cross section with additional fiber layers of the reinforcing region within a reinforcing region. In other words, within a reinforcing region, one, a plurality or all of the additional fiber layers are enclosed in each case by two complete fiber layers, the semi-finished fibers of which extend in the fiber direction over the entire fiber preform (fiber layer of the base laminate). This means that after the deposition of a complete fibre layer of the base laminate, an additional fibre layer is deposited in the reinforcing region onto this complete fibre layer, while subsequently a complete fibre layer of the base laminate is deposited again and thus also onto the previously deposited additional fibre layer in the reinforcing region. Thus, the additional fibrous layer is enclosed both above and below by a complete fibrous layer of the base laminate. In this case, the fiber orientation between the lower complete fiber layer of the base laminate and the additional fiber layer in the reinforcing region is changed, so that the fiber orientation of these two fiber layers is not the same. The same also applies to the next complete fiber layer of the base laminate, which is laid onto the additional fiber layer as well. This too differs in terms of the fiber orientation from the fiber orientation of the additional fiber layer.According to the invention, the semi-finished fibers of at least one additional fiber layer are laid down in an edge region of the at least one reinforcement region beyond the reinforcement region without these semi-finished fibers laid down beyond the reinforcement region being cut in the longitudinal direction in the edge region. Consequently, the reinforcing region is no longer sharply delimited, but rather is defined by a complete fibre web width. The predetermined end edge of the reinforcing region serves as an orientation for depositing the fiber webs, wherein in particular the first or last fiber web to be deposited is not cut in the edge region, but is deposited, if applicable, beyond the boundary of the reinforcing region and thus protrudes beyond the edge.According to the invention, a first additional fiber layer, which was laid in front of a second additional fiber layer with the same fiber direction, has a greater or a smaller extension orthogonal to the fiber direction than the second additional fiber layer. The first fiber layer is consequently a fiber layer which, in the cross section of the fiber preform, lies below the second additional fiber layer and has thus been laid down first compared to the second additional fiber layer during the production of the fiber preform. If all previously deposited additional fiber layers have a greater extent orthogonal to the fiber direction, then a symmetrical pyramidal gradation (symmetrical) is produced within the reinforcing region with respect to the additional fiber layers, which, however, cannot always be realized in the reinforcing region depending on the predefined ramp geometry. Consequently, it is also possible to deposit additional fiber layers which have a greater extent with respect to an already pre-laid additional fiber layer in order to ensure that the additional fiber layer to be deposited has an extent orthogonal to the fiber direction which corresponds to a multiple of the fiber web width of the fiber webs.Alternatively or additionally, it is provided according to the invention that, with respect to the cross section of the respective thickening section, the additional fiber layers are deposited in such a way that they are not aligned symmetrically, but rather are deposited offset relative to one another in order to achieve that the extent of each individual additional fiber layer orthogonally to the fiber direction corresponds to a multiple of the fiber web width.It is conceivable that, with respect to a second additional fiber layer that has been laid down after a first additional fiber layer, it is laid down offset with respect to the first additional fiber layer, so that this second additional fiber layer protrudes at least partially beyond a layer edge of the first additional fiber layer. The offset arrangement of the additional fiber layers within the reinforcing region ensures that the additional fiber layers correspond to a multiple of the fiber web width of the individual fiber webs and at the same time a corresponding ramp can be introduced for the reinforcing region, so that the fiber laying head can also deposit the complete fiber layers of the base laminate in the reinforcing region.The object is also achieved, moreover, with claim 6 for producing a fiber composite component from a fiber preform by curing a matrix material of a fiber composite material embedding a fiber material of the fiber preform, wherein the fiber preform is produced according to the method as described above.The object is also achieved, moreover, by a fiber laying system having at least one automatic movement device, on which a fiber laying head is arranged as an end effector, which head is designed for depositing semi-finished fiber products in web or strip form onto a tool, wherein the fiber laying system has a control device which is designed for moving the fiber laying head by means of the automatic movement device and for controlling the fiber deposition by means of the fiber laying head. The fiber laying installation is designed to produce a fiber preform on the tool according to the method as described above.The invention is explained in more detail by way of example with reference to the appended figures. The following are shown: FIG. 1 shows a schematic illustration of a fiber composite component with a thickening region; FIG. 2 shows a schematic illustration of a cross section of the fiber preform in the thickening region with a symmetrical arrangement; FIG. 3 is a schematic illustration of a cross section in the thickening region with an asymmetric arrangement; FIG. 4 is a schematic illustration of fiber webs in the thickening region; FIG. 5 shows different layer contours using the example of the basic form "pylon".FIG. 1 shows, in a greatly simplified manner, a fiber preform 1 which has been produced from a plurality of fiber layers 2. The individual fiber layers are formed from individual fiber webs 3 in that these fiber webs 3 are laid next to one another in each individual fiber layer 2.Each individual fiber web can consist of one or more individual semi-finished fiber products in the form of webs or strips, for example when depositing towns.Furthermore, there is a reinforcing region 4 in the fiber preform 1, within which additional fiber layers 5 have been introduced into the fiber preform 1. For this purpose, additional fiber webs are deposited exclusively in the reinforcing region 4, namely exclusively in the reinforcing region 4, these additional fiber webs being deposited only in the reinforcing region 4. As a result, the number of fiber layers increases overall in the reinforcing region 4 and is therefore greater than in the remaining part of the fiber preform 1.The additional fiber layers 5 in the reinforcement region 4 differ from the remaining fiber layers of the fiber preform 1 in that they do not extend over the entire fiber preform 1. Rather, the additional fiber layers 5 are locally limited to this reinforcing region 4 in the reinforcing region 4.It is conceivable that the reinforcing region 4, as indicated schematically in FIG. 1, has a small proportion in relation to the remaining fiber preform 1. However, it is also conceivable for the reinforcing region 4 to be significantly larger in relation to the entire fiber preform and to assume above 50%.FIG. 2 schematically shows a cross section through the individual fiber layers of the fiber preform 1 in the reinforcing region 4. the slightly thicker emphasized fiber layers form the additional fiber layers 5, while the thinly drawn fiber layers represent the fiber layers 2 of the entire fiber laminate. As can be seen, the additional fiber layers 5 taper upwards, so that a ramp is formed in the edge regions, i.e. during the transition from the additional fiber layers 5 to the complete fiber layers 2. In the exemplary embodiment of FIG. 2, the fiber webs 6 of the additional fiber layers 5 are laid with a fiber orientation in the direction of the viewing plane, wherein the width of each additional fiber layer 5 corresponds exactly to a multiple of the fiber web width 6. Consequently, no fibers have to be cut at the edges or individual semi-finished fibers have to be shut off, if necessary.FIG. 2 shows an exemplary embodiment in which the additional fiber layers 5 become smaller with each additional fiber layer 5 lying above it, the individual additional fiber layers 5 always being aligned centrally and thus resulting in a symmetrical arrangement of the additional fiber layers 5 with respect to the additional fiber layers 5.FIG. 3, on the other hand, shows an embodiment in which the individual additional fiber layers 5 both have different expansions orthogonally to the fiber direction of the fiber webs and are arranged offset to one another, so that an asymmetric arrangement results. This asymmetrical arrangement can firstly ensure that each additional fiber layer 5 has an extent orthogonal to the fiber direction which corresponds to a multiple of the fiber web width, it being possible at the same time to realize the ramp design at the transition from the base laminate to the reinforcing region. It was recognized that a symmetrical arrangement of the additional fiber layers 5 is not absolutely necessary in order to realize a ramp design in the transition from the base laminate to the reinforcing region. Rather, offset deposition of the additional fiber layers 5 relative to the respective other fiber layers can also be carried out, so that a corresponding ramp design can nevertheless be produced.For a uniform ramp, it is advantageous if no two additional fiber layers 5 (in particular the same fiber orientation) end directly one above the other, but all edges are offset relative to one another.FIG. 4 shows an example of additional fiber webs 6 of an additional fiber layer 5 within a reinforcing region 4 defined by a reinforcing edge region 7. In order to prevent the additional fiber webs 6 from having to be cut in the longitudinal direction, in particular at the left and right reinforcing edge region 7, in the present invention the outermost additional fiber webs 6 are deposited beyond the reinforcing edge region 7, so that the additional fiber layer 5 protrudes beyond the actual edge of the reinforcing region 4 and thus does not exactly depict it. By interleaving several layers as shown in Fig. 4, a ramp is then formed.Finally, FIG. 5 shows various approaches for depositing additional fiber webs within a reinforcing region having a basic shape "parallelogram". The four different fiber orientations 0°, 90°, +45° and -45° were taken into account. The upper left here shows the fiber placement with a fiber orientation of 0°, wherein here the fibers were not cut in the edge region on the left and right, so that the staircase-shaped gradation results. In addition, the extent orthogonal to the fiber direction was limited to a multiple of the respective individual fiber web width.At the top right, a 90° orientation can be seen, wherein here too the extent orthogonal to the fiber direction is limited to a multiple of the fiber web width. This has the result that the fiber webs are laid down beyond the basic shape of the reinforcing region, wherein they can be cut exactly at the top and bottom. At the left and right edges, no blank is required for this purpose.A fiber orientation of +45° is shown at the bottom left, while a fiber orientation of -45° is shown at the bottom right. The + / - 45° layers show rectangular widenings at two opposite corners. These are required in order not to fall below a minimum web length, which results from the distance of the fiber feed to the blades of the cutting device.By interleaving such forms of fiber layers as shown in FIG. 5 (here using the example of a parallelogram), the desired ramp or ramp geometry can finally be produced.List of reference characters1 Fiber preform 2 Complete fiber layers 3 Fiber webs 4 Reinforcing region 5 Additional fiber layers 6 Additional fiber webs 7 Reinforcing edge region

Claims

Method for producing a fiber preform (1) from a fiber material of a fiber composite material, wherein a fiber composite component is to be produced from the fiber preform (1) by curing a matrix material of the fiber composite material embedding the fiber material of the fiber preform (1), wherein the method comprises the following steps: - depositing a plurality of fiber webs (3) onto a tool by means of a fiber laying head of a fiber laying installation, wherein a single fiber web (3) is formed by one or more web- or strip-shaped fiber semi-finished products which can be deposited by means of the fiber laying head, - wherein the fiber webs (3) are deposited layer by layer one above the other and next to one another in a fiber layer (2), - wherein in at least one predetermined reinforcing region (4) of the fiber preform (1) a plurality of additional fiber layers (5) are formed by depositing additional fiber webs (6), - wherein the additional fiber layers (5) are laid down in the reinforcing region (4) by means of the fiber laying head in such a way that the extent of at least one additional fiber layer (5) orthogonally to the fiber direction of the semi-finished fibers corresponds to a multiple of the fiber web width of the fiber webs (6) of the respective additional fiber layer (5), characterized in that - in an edge region of the at least one reinforcing region (4) the semi-finished fibers of at least one additional fiber layer (5) are laid down beyond the reinforcing region (4) without these semi-finished fibers laid down beyond the reinforcing region (4) being cut in the edge region in the longitudinal direction, and - wherein a first additional fiber layer (5) laid down before a second additional fiber layer (5) having the same fiber direction has a greater or a smaller extent orthogonally to the fiber direction, as the second additional fiber layer (5) and / or - wherein a second additional fiber layer (5), which was laid after a first additional fiber layer (5), is laid offset with respect to the first additional fiber layer (5), so that the second additional fiber layer (5) protrudes at least partially beyond a layer edge of the first additional fiber layer (5).Method according to claim 1, characterised in that all additional fibre layers (5) are laid down in a single reinforcing region (4) in such a way that the extent of each additional fibre layer (5) orthogonally to the fibre direction of the semi-finished fibre products corresponds to a multiple of the fibre web width of the fibre webs (6) of the respective additional fibre layer (5).Method according to claim 1 or 2, characterised in that the fibre web width of a fibre web (3, 6) corresponds to the sum of the fibre semi-finished product width of the individual web- or strip-shaped fibre semi-finished products.Method according to claim 1 or 2, characterised in that the fibre web width of a fibre web (3, 6) corresponds to the sum of the fibre semi-finished product width of the individual web- or strip-shaped fibre semi-finished products plus a predetermined gap between two fibre webs (3).Method according to one of the preceding claims, characterized in that at least one complete fibre layer (2), the semi-finished fibre products of which extend over the entire fibre preform (1) in the fibre direction, is deposited on one, a plurality or all of the additional fibre layers (5) of a reinforcing region (4).Method for producing a fibre composite component from a fibre preform (1) by curing a matrix material of a fibre composite material embedding a fibre material of the fibre preform (1), characterized in that the fibre preform (1) is produced according to the method according to one of the preceding claims.Fibre laying installation having at least one automatic movement device, on which a fibre laying head is arranged as end effector, which head is designed for depositing semi-finished fibre products in web or strip form onto a tool, wherein the fibre laying installation has a control device which is designed for moving the fibre laying head by means of the automatic movement device and for controlling the fibre deposition by means of the fibre laying head, characterized in that the fibre laying installation is designed for producing a fibre preform (1) on the tool according to the method according to one of Claims 1 to 5.

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