• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a fiber material blank for producing a fiber composite component (32), preferably for a vehicle, in particular for a motor vehicle, wherein the fiber material blank (30) is formed as a fiber strand (5) provided on a frame, which is characterized in that at least one Fiber strand (5) is wound on a winding frame (1), wherein the winding frame (1) on an outer peripheral edge teeth (4). The present invention furthermore relates to a method for producing a fiber composite component, characterized by the following method steps: provision of a fiber material blank 30 on a winding frame 1, insertion of the fiber material blank 30 with the winding frame 1 into a forming tool 35 in which the fiber material blank (30) is provided with a matrix resin before or during the forming process and / or provided with a melting thermoplastic - transforming the fiber material blank (30) into a fiber composite material component (32), - removing the fiber composite component (32).
    公开号:AT512563A2
    申请号:T501322013
    申请日:2013-02-28
    公开日:2013-09-15
    发明作者:
    申请人:Benteler；Benteler Sgl Gmbh & Co Kg；
    IPC主号:
    专利说明:

    -1-
    Fiber material blank as well
    Process for producing a fiber composite material component
    The present invention relates to a fiber material blank for producing a fiber composite component according to the features in the preamble of patent claim 1.
    The present invention further relates to a method for producing a fiber composite component according to the features in claim 12.
    In the processing of fiber composites, great progress has been made in recent years for automated production. Thus, in vehicle construction, for example, for aircraft or even for motor vehicles, focused on lightweight construction, for which fiber composite components are optimally suitable, since they have high strength properties at high shaping degrees of freedom and low specific weight.
    Nowadays it is possible to manufacture fiber material components automatically in modern production lines. For example, DE 100 59 801 A1 discloses a production method in which a fiber composite structure which is produced from a blank which can be consolidated by means of extrusion under the action of heat is produced from at least one flowable fiber layer impregnated with a matrix system and restructured during extrusion. For this purpose, multilayer blanks of manipulators or industrial robots are also picked up, stacked and fed to a forming plant. In the forming plant on the one hand, the shaping, on the other hand, the curing, for example by supplying heat.
    A disadvantage of such automated manufacturing equipment is the contamination of the individual tools of manipulators and gripping devices within the production line as a result of dripping from the fiber composite matrix resin. Another problem, especially in shaping with local high -2-
    Conversion grades, is the targeted fiber orientation or fiber orientation and also the fiber density within the automated fiber composite component.
    From the fiber density and the fiber orientation, however, the strength values and the rigidity values of the fiber composite component produced are highly dependent. Here there is a further problem in the automated production of fiber composite components, which due to the deformation, a shearing of the individual fibers within a fabric or even Geleges a fiber tear may arise.
    The aim is to keep the production tolerances as low as possible and to enable or maintain a targeted fiber orientation even with locally high degrees of deformation. For this purpose, clamping frames are known from the prior art, with flat fiber mats, for example in the form of loops, woven fabrics or even knitted fabrics are used in such a clamping frame and then formed in a forming tool to the corresponding fiber composite component. Such a method is known for example from DE 199 30000 Al. A further alternative to the use of a clamping frame is the DE 10 2007 047 734 Al dar. Here are different fiber mats by means of a clamping frame, which fixes the fiber mats edge clamping, converted in a mold to the corresponding fiber composite component.
    The fiber material itself can be a variety of fiber types. Exemplary carbon fibers, glass fibers, Aramidfasem, Basaltfasem, but also Metallfasem mentioned. Also, mixed forms of the aforementioned fiber types are processed, which are then fiber bundles or rovings. Likewise, different fiber layers are superimposed, wherein the fiber layers each have different orientations to each other, so that in turn can be adjusted selectively different strength properties. For example, such different orientations of fiber layers and the use of different types of fibers from DE 10 2009 052 263 Al are known. -3-
    The individual fiber materials are offered by the fiber manufacturers in various forms. In this case, fabrics, scrims or else knits or felts or nonwovens, and consequently flat forms of the fiber materials, represent an expensive alternative to fibers or fiber strands that are wound on a spool. In the further processing of semi-finished products, ie of fiber materials supplied on a wide scale, a high amount of waste also results, since only a portion of the processed fibers are effectively installed in the later component. The remaining fibers are above the already above-mentioned tenter over or over the component circumferential and are cut off after shaping. So it's a high cut.
    A disadvantage of individual fibers or fiber bundles or rovings, which are processed at a manufacturer even to semi-finished products or directly in fiber composite applications, is the poor Kontrollierbarkedt during forming. Thus, these fibers can shear off easily or in any other form uncontrolled or processed only in compliance with very widely tolerated production tolerances. A sometimes cheaper purchase of the raw materials of the fiber material is thus compensated by higher production costs.
    It is therefore an object of the present invention, starting from the prior art, to provide a cost-effective possibility to provide a fiber material blank which is optimally adapted to the fiber composite component to be produced and to show a fiber composite component manufacturing method with which fiber composite material components can be inexpensively manufactured with high production accuracy and high degrees of freedom of forming.
    The above object is achieved with a fiber material blank for producing a fiber composite component according to the features in claim 1.
    The object is further achieved by a manufacturing method for producing the fiber composite component having the features in claim 12.
    Advantageous embodiments are part of the dependent claims. -4-
    The fibrous material blank according to the invention for producing a fiber composite component, preferably for a vehicle, in particular for a motor vehicle, wherein the fiber material blank is formed from provided on a frame fiber strands, is characterized in that at least one fiber strand is wound on a winding frame, wherein the winding frame on a outside circumferential edge projections, in particular teeth, has.
    In the fiber material blank according to the invention thus a winding frame with an outer peripheral edge with at least one fiber strand, preferably also with two or more fiber strands, wound, wherein on the outer circumferential edge outwardly projecting or outwardly oriented projections, in particular teeth are formed, wherein these keep the at least one on the winding frame externally wound fiber strand positively oriented fixed in position.
    In particular, fiber composite material components for vehicles, for example for ships, aircraft or else for motor vehicles, can be produced with the fiber material blank according to the invention. For example, can be made for aircraft window frames for windows or for motor vehicles various body parts, such as B-pillars, roof skins, hoods od. Like. Components.
    The fiber material blank in particular offers the advantage that a fiber strand can be wound onto a winding frame and thus the possibility is provided of optimally adapting the blank itself to the fiber composite component to be produced. With regard to fiber orientation, fiber density and also with reference to the waste produced during the forming process and during the further completion process, the fiber material blank is thus produced optimally. Due to the further possibility of using fiber strands provided on spools, a particularly favorable purchase of the fiber material compared to sheetlike fiber materials in the form of scrims or woven fabrics or the like takes place, which is why the production costs can be reduced with a production method using the fiber material blank according to the invention. -5-
    The Fascrwcrkstoffrohling invention is particularly designed such that the winding frame has an outer circumferential frame with a frame surrounding the outside edge, wherein on the edge outwardly oriented projections, in particular teeth are arranged. An interior of the winding frame is recessed and is covered by a wound on the winding frame fiber strand in the interior area. The actual fiber material blank is then formed in this areal region, the fibrous bondbelt component being produced by retracting a forming die and adding matrix resin or else thermoplastic hardening material.
    In the context of the invention, the inner region is particularly hollow, very particularly preferably when the winding frame itself is formed of a metallic, especially light metallic, or of a plastic material. If the winding frame itself is formed from a thermoplastic material or from a matrix resin material, the same itself may also be formed inside, at least in sections, solid, in particular full-surface, so that in the further forming process then the inner area melts and for a homogeneous distribution of the composite material within the fiber composite material provides.
    The wound on the winding frame fiber strand then has each extending from one edge to the other edge fiber strand sections, which are preferably unidirectionally oriented, parallel to each other and / or omindirectionally oriented wound on the winding frame. Depending on the required fiber orientation of the fiber composite material component to be produced, it is thus possible to adapt the fiber material blank to the fiber composite material component to be produced by targeted winding and fiber lining.
    Further preferably, the winding frame has a front side and a rear side, wherein on the front or on the back of the winding frame, a planar region of the fiber strand is formed or that on the front and on the back of a respective area of the fiber strand is formed, wherein the fiber material blank is formed in particular by the area itself. -6-
    In the further forming process for producing the fiber composite component, the planar region is processed by forming technology, in which case the outer edge region of the winding frame and also the fiber strands arranged here are produced as a waste and thus as a production residue.
    In the context of the invention, it is further possible here that the fiber strands are wound from a thermosetting material on the winding frame and then the winding frame is removed even after partial curing, so that only the area covering the interior of the winding frame, as a fiber material blank remains. This fiber material blank is then particularly resistant to bending and can be inserted by a manipulator, for example with a vacuum gripper, in a forming tool. According to the invention, there is the advantage that sometimes each individual fiber orientation of a fiber strand section can be oriented in a targeted oriented manner and the fiber material density can be selectively adjusted at least in terms of area in sections within the fiber material blank. For example, this is achieved by impregnating the fiber strand during the winding process. Also, the fiber material can be stiffened with wax, wherein the wax then melts in a forming process.
    In the context of the invention, the winding frame furthermore preferably has a round, very particularly preferably a circular, outer contour. It is possible to produce the fiber material blank particularly easily in a Bewicklungsvorrichtung, wherein the winding frame is set into a rotational movement and thus the fiber strand over the respective inner region of the winding frame is tensioned and wound around the outer edge, wherein the fiber strand between two teeth in a Interdental space is held positively.
    In the context of the invention, however, it is also possible that the winding frame has a polygonal, in particular a polygonal, very particularly preferably a rectangular, contour or else a mixed form of the aforementioned contour types. For example, it is possible in the context of the invention that the winding frame is designed as a round polygon. Depending on the choice of the winding frame of the produced outer circumferential contour of the fiber composite component, -7-
    Further preferred is between the fiber strand sections of the
    Fiber material blanks which extend over the inner region of the winding frame, a film wrapped, preferably a thermoplastic film, or a release film. In this case, it is possible that in the later forming process and / or a heat treatment process, the thermoplastic material of the film melts and thus ensures a homogeneous distribution of the composite material within the fiber material blank. It is also possible to prevent by selective wrapping a release film, a bonding of the individual layers. It is also possible within the scope of the invention to wrap a plurality of films, for example of thermoplastic material, in the fiber material blank according to the invention.
    In the fiber material blank according to the invention furthermore results in particular the advantage that between the two planar areas of the fiber material blank, ie between the front and back of the winding frame and thus in the area enclosed in the interior between the front and back of the winding frame, at least partially a core is wrapped , preferably a core of thermoplastic material, wherein the thermoplastic material melts by thermal action. In the context of the invention, it is thus possible to provide the fiber material blank in such a way that the thermoplastic material melts in a subsequent forming process and / or a heat treatment process by the action of heat and thus a homogeneous distribution of the composite material takes place from the inside out. It is also possible to wrap matrix resin material as a core within the fiber material blank according to the invention.
    In the context of the invention, it is further possible that the core is formed as a mold core and the mold core is formed from a filling material and / or that the mold core is hollow. This may be, for example, a core in the form of a balloon or a bubble. In the context of the invention, it is also possible, for example, to wrap a core of, for example, a polystyrene material or of a different type of plastic material. Also it is possible under the
    -8th-
    Invention to wrap the core of a wax material or a core made available from sand.
    The core can then remain in the fiber composite material component to be produced and in this case also have supporting properties or properties which increase the strength of the fiber composite component.
    In the context of the invention, it is also possible to get the core from the fiber composite component after completion of the forming process, for example, by melting the wax or by letting out the sand. So it can be a lost core. In the context of the invention, however, it is also possible to incorporate a core which can be released from the fiber composite component after completion of the forming process and can be reused. For example, a rubber material or the like may be used for the core.
    Preferably, the winding frame itself is also designed as Kem, wherein the winding frame is not completely hollow in Innenbeieich, but at least partially solid and then preferably completely melts in a forming process, in particular the winding frame is formed for this purpose of a thermoplastic. In the context of the invention, it is possible to form the winding frame itself over the entire surface of the thennoplastic material, in which case the thermoplastic material or even a solid matrix resin material completely melts before, during or after the forming process by a thermal action and for a homogeneous distribution within the fiber composite component, in particular from within, ensures. In the context of the invention, however, it is also possible to form the winding frame completely from a wax material or from another melting material, which also melts, for example, or otherwise from the produced fiber composite component or during the forming of the
    Fiber material blanks to the fiber composite material component is taken out of the Faserwelkstoffrohling. -9-
    In the context of the invention, the winding frame itself is particularly preferably formed of an elastic material, in particular of a plastic material, so that it is biased during Bewicklungsvorgang, ie in the actual production of the fiber material blank, and wound around the winding frame fiber strand sections by an outwardly pressing radial force tense, so that they stretch tightly over the interior. It is also possible with an elastically formed winding frame that this further deforms during further forming process, that the wound and tensioned on him fiber strands can be specifically tracked in the forming or its mold cavity to locally high degrees of deformation in the fiber composite material to be produced realize. In this case, the winding frame is then either destroyed in such a way that it can only be used once, or after removal of the fiber composite component from the winding frame, it elastically deforms back so that it can be used multiple times. The winding frame serves in this case at the same time as a clamping frame, which can be a costly re-tightening the wound flat fiber material blank omitted.
    Also, the winding frame then also serves for the individual transfer, for example, from the Bewicklungsvorrichtung to a storage area and from the storage area in a uniform device, as a transport frame. As a result, the production costs can be significantly reduced again, since no complex transport or clamping devices and set-up times for performing the individual operations are needed.
    In the context of the invention, it is also possible to provide a Faserwerkstoffirohling, wherein the Faserwelkstoffrohling is formed with two mutually coupled winding frame. In particular, the two mutually coupled winding frames are one above the other flat. In the context of the invention, it is also conceivable to couple three, four or more winding frames one above the other and thus to provide a multilayer fiber material blank. For example, individual winding frames can then have unidirectionally oriented fiber strands and other winding frames, which then either all oriented in parallel or in a respective 40
    Are arranged angle to each other oriented. It is also conceivable to provide winding frames with unidirectionally parallel oriented fiber strands with a further winding frame with omnidirectionally oriented fiber strands. In this case, the winding frames themselves may have coupling devices, for example extensions, depressions, or else a tongue and groove system in order to be fixed in position relative to one another. In the context of the invention, a clamping device is included, which allows variable, two, three or even ten winding frame to clamp together form fit. This clamping device can, for example, operate on the principle of a screw clamp or a clamp holder.
    In the context of the invention, the flat areas which are parallel to one another or else directly superimposed are furthermore preferably coupled to each other at least in sections, in particular, these are sewn together and / or glued together. This ensures that the individual layers are relatively fixed in position relative to one another. When carrying out a shaping process, there is thus no relative displacement of the individual layers relative to one another, in particular of the individual fibers. By this measure, it is possible to produce a fiber composite component, which has a particularly high production accuracy with respect to the respective fiber orientation.
    In the context of the invention, the fiber material blank is further characterized in that mutually different fiber materials are wound on a winding frame, preferably the mutually different Faserwefkstoffe come from the group of Karbonfasem, glass fibers, Aramidfasem, basalt fibers and / or Metallfasem, being particularly Preferably, the at least two mutually different fiber materials are wound in an unequal quantitative ratio to each other on the winding frame. For example, it is thus possible to provide a fiber material blank of carbon fibers or of glass fibers, which has a small proportion of reinforcing metal fibers.
    The thermoplastic fibers or thermoset fibers or matrix resin fibers are preferably wound onto the winding frame. In the context of the invention, the aforementioned fiber types can also be wound in a combined manner on the winding frame.
    The present invention furthermore relates to a method for producing a fiber composite component using a fiber material blank having at least one of the aforementioned features, wherein the method is characterized by the following method steps: providing a fiber material blank on a winding frame, inserting the fiber material blank with the winding frame into one Forming tool, wherein the fiber material blank is provided before or during the forming processes with a matrix resin and / or provided with a melting thermoplastic, - uniforms of the fiber material blank to a fiber composite material component and - removal of the fiber composite component.
    In the method according to the invention, a fiber material blank is provided on the winding frame, wherein the winding frame also serves as a transport frame and clamping frame. The fiber material blank is then placed with the winding frame in a forming tool, wherein a arranged in the inner region of the winding frame area of Faseweikstoffes is transformed within the forming tool. The forming tool consists for example in the context of the invention of a Oberweikzeug and a lower tool that then merges analogous to a B lechumformWerkzeug and has a mold cavity. Within the mold cavity, the fiber composite component is then produced.
    So that the Faserwefkstoff obtained after the forming process strength, provided on the winding frame Faserweikstoffrohling is provided before or during the forming process with matrix resin. For example, the matrix resin is applied by means of a spraying device on the Faserweikstoffrohling. It is the same
    12 possible that the matrix resin is already present within the fiber material blank and then activated by chemical additives, for example the addition of an activator or a harder or by thermal action, for example by the action of temperature, so that the fiber material blank with the matrix resin is deformable and then begins to cure, so that the produced fiber composite component receives a corresponding rigidity.
    In the context of the invention, however, it is also possible that the matrix resin or else a thermoplastic is already introduced beforehand within the fiber material blank, for example by a wrapped thermoplastic film. During the forming process, it is thus possible to melt the thermoplastic by the action of temperature and to distribute itself homogeneously within the fibers.
    Within the scope of the invention, however, it is also possible that the fiber material is molded within the mold and then matrix resin is introduced into the mold cavity during the molding process or after the molding process.
    Following the molding process, the fiber composite material formed to the fiber composite component is then removed from the mold.
    In the context of the invention, in particular a Faserweikstoffrohling is formed on the forming tool, which is formed on two, in particular three or more stacked on each frame stacked so stacked at least two frames are in the forming tool and simultaneously formed so that a multilayer, at least two-ply, in particular with regularly wrapped frame four-day, fiber composite component is formed.
    Furthermore, the winding frame is particularly preferably removed before and / or during the forming process. In the context of the invention, it is of course also possible that the winding frame, which serves in particular as a clamping frame during the forming process, is removed after the forming process of the formed fiber composite material component. In particular, the removal is carried out by cutting or cutting or by cutting by a punching process. 43
    In the context of the invention, however, it is also possible that in the manufacturing process for the fiber composite component of the winding frame is removed before the forming process. In the context of the invention, this is to be understood to mean that the winding frame is already removed during or after the production process for the fiber material blank, in which case the area of fibrous material wound on the winding frame then remains as the fiber material blank. This can be transported as fabric or scrim, in particular in omnidirectional winding then flat, for example by vacuum gripper or nail gripper, in the forming tool.
    In the context of the invention, it is also possible that the fiber material has such a stiffness by an additional curing agent, that the particular omnidirectional wound fiber strand sections are not entwined each other, but are arranged fixed in position relative to each other. Here, too, a transfer by means of a manipulator or by means of a vacuum gripper or nail gripper or other gripping device in the forming tool then takes place.
    In the context of the invention, however, it is also possible that the winding frame is removed during the forming process. In the context of the invention it is conceivable that in the forming tool itself such punching or cutting devices are arranged, which separate the winding frame from the flat or planar fiber composite material and / or the already formed fiber composite material component when closing the forming tool. In the context of the invention, it is particularly advantageous that the fibers arranged at the edge, in particular the fibers wrapped around the frame or the edge, are not wetted by the forming process itself with matrix resin or another hardening agent and thus without recycling of the hardening agent, a recycling process, For example, the production of a web of recycled fibers, can be supplied directly.
    In the context of the invention, when using in particular an elastically deformable winding frame, the winding frame can be used as a clamping frame in such a way that the fiber strands pulling inward during the forming process contract the winding frame and at the same time by the radially outwardly acting forces of the fourth 4
    Winding frame a tensile force is applied to the fiber strands, which allow a particular wrinkle-free nestling this in the mold cavity.
    In the context of the invention, it is possible to match the winding frame to the forming tool so that when the forming tool is closed
    Winding frame abuts almost abruptly on the outside of the mold halves. As a result, the manufacturing process is optimized so that a wrinkle-free feeding of the fibers during the forming process in the mold cavity is made possible and at the same time by not outwardly projecting fibers, possibly the fibers that are wound around the winding frame, a very low waste or production residue, which in turn reduces production costs enormously.
    In the context of the invention, it is also conceivable that the winding frame has a circumferential groove on the outer frame, wherein during the
    Forming process a hold-down or a part of the forming tool itself enters the groove and cuts off in the direction of the outer winding frame standing part of the fiber material blank or separated. A separate cutting process is thus not required, wherein after complete curing of the fiber composite component, the cut edge according to still by cutting or cutting measures accurately to the
    Target use is adjusted.
    In the context of the invention, the winding frame is further cut off during the forming and / or after the forming, preferably when the
    Forming tool is still closed, or the winding frame is cut after removal of the molded fiber composite component. In the context of the invention is here depending on the application of the component to be manufactured and the winding frame used to select a correspondingly advantageous training. So wild, for example, at locally high degrees of deformation and strong contraction of the winding frame, a cutting during and / or after the forming preferred so that not strong radially outward acting forces of the winding frame after the opening of the mold the molded fiber composite material member again. In a winding frame used, for example made of steel or metallic materials 15, in particular light metallic materials, which is elastically contracted during the forming process hardly or only in negligible manner, further handling of the fiber composite material component produced with the help of the frame may be advantageous, which is why the frame only after the forming process and after removal of the molded fiber composite component from the Umformweikzeug is cut off from this.
    In the context of the invention, it is also possible that the winding frame has a laterally encircling groove, wherein a cutting device, such as a knife or a saw, thus a release agent engages the groove and led to the winding frame according to the invention wild and thus the on the winding frame wound fiber strands cut so that they can be removed from the winding frame.
    In particular, results in the production process according to the invention with a winding frame, the advantage that the felt on the winding frame parts of the fiber material as a waste and thus as a production rest accumulates, but this particular is not matrix resin or thermoplastic, therefore not hardened and in a simple way and can be recycled.
    In the context of the invention, the fiber material blank is further heat-treated before, during and / or after the forming in the forming tool. In particular, the heat treatment takes place in the forming tool itself. In the context of the invention, the fibrous material preform is preferably loaded with a matrix resin prior to insertion into the forming tool, or else the fibers are already pre-impregnated and / or in another application it is possible that by the use of thermoplastics, for example as a thermoplastic core or as wrapped Foil or as coated fiber strands, a thermal activation of the above-described hard composite materials is required.
    The winding process itself and the handling of the wound on the winding frame fiber material blank is particularly clean in the invention, d. H. without 1 & dripping hardening materials, possible. The hardening materials are in the cold state, ie at about room temperature, even in a solid state or in a very viscous or jelly-like state, so that dripping and thus fouling of the production plant is largely avoided. As a result of the thermal action, liquefaction of the above-described hardening materials takes place first, followed directly by a hardening process which gives the necessary strength to the fiber composite component to be produced.
    In particular, when using thermoplastics melt on this and in turn consolidate by the cooling. Matrix resin materials are activated and mixed in particular with a hardener contained in the matrix resin, so that subsequently takes place a chemical curing process. This can also be temperature-bound. By the particular heat treatment within the forming tool itself is thus avoided that one of the above-mentioned hardening materials drips onto the production plant or pollutes them.
    In the context of the invention, it is also possible to heat treat the fiber material blank during or after the forming, preferably in the forming tool, not only, but also optionally or alternatively to cool. In the case of supplementary heat treatment and cooling treatment, these take place in chronological succession or else separate from each other in time. If only a heat treatment or only a cooling takes place, the corresponding processes can be made by arranging heat sources, such as infrared radiators, or cooling options, for example by a fan cooling.
    Furthermore, contamination of the forming tool itself can be avoided by inserting release films or by coating the forming tool itself with release agents, so that overall results in a very clean production process, which simultaneously ensures high production stability with low production tolerances and costly cleaning and maintenance costs Production facility avoids. A 7
    Further advantages, features, characteristics and aspects of the present invention are part of the following description. Preferred embodiments are shown in the schematic figures. These are for easy understanding of the invention. Show it:
    Figure 1 shows a winding frame according to the invention; Figure 2 shows a winding device according to the invention with winding frame; Figure 3a to f a winding frame according to the invention during the winding; Figure 4 is a detail view of the edge of the winding frame; Figure 5a to c different tooth shapes on the edge of the winding frame; Figure 6a to d a winding frame according to the invention with different winding directions; Figure 7a to b a winding frame before and after the deformation; Figure 8a to c a winding frame according to the invention during the forming process; FIG. 9 shows a winding frame according to the invention in a cross-sectional view with a wrapped core; Figure 10a to c a erfmdungsgemäßen rectangular winding frame with different windings; Figure 1 la to c four stacked winding frame.
    In the figures, the same reference numerals are used for the same or similar components, even if a repeated description is omitted for reasons of simplification.
    FIG. 1 shows a winding frame 1 according to the invention in a plan view. The winding frame 1 has an outer circumferential frame 2, wherein the 48
    Frame 2 in turn has a frame 2 bordering the outside edge 3. On the edge 3 teeth 4 are arranged at intervals. By way of example, a fiber strand 5 is wound onto the winding frame 1, wherein the fiber strand 5 respectively comprises the outer frame 2 of the winding frame 1 at the edge 3 and comes into abutment in a tooth gap 6 and is held there in a form-fitting manner. The winding frame 1 further has a front side 7 and a non-visible rear side, the rear side being formed on the side of the winding frame 1 opposite the front side 7.
    The winding frame 1 has an inner region 8, which is enclosed by the outer circumferential frame 2. Between the outer circumferential frame 2, an inner diameter 9 is formed, wherein the winding frame 1 also has an outer diameter 10, and the outer diameter 10 depending on the application including or excluding the teeth 4 can be seen.
    Figure 2 shows a winding device 11 according to the invention, wherein the winding device 11 is formed for receiving the winding frame 1 according to the invention. For this purpose, the winding device has 11 support rollers or guide rollers 12 which comprise the winding frame 1 circumferentially. The guide rollers 12 can be moved in each case in the translational direction 13, so that the winding device 11 is suitable for receiving winding frame 1 with different outer diameters 10.
    The winding frame 1 undergoes a rotational movement 14 about its center point 15, so that a fiber strand 5 provided on a spool 16 is unwound from the spool 16 and wound onto the winding frame 1. A carrying of the fiber strand 5 is due to the positive engagement of the fiber strand 5 in the interdental spaces 6 of the arranged on the outer edge 3 of the winding frame 1 teeth 4th
    In the context of the invention, the winding frame 1 is shown here driven by a drive roller 17, so that it carries out the rotational movement 14. In the context of the invention, however, it is also possible to suspend the winding frame 1 at its center 15 and then also drive over the center 15, so that, for example, other outer contours of the winding frame 1 can be wound with the winding method according to the invention. For example, these are angular, in particular rectangular, outer contours.
    The winding frame is then constructed, for example, analogous to a spoked wheel. In the middle of a hub is arranged and the outer circumferential rim, here the winding frame, is connected via spokes to the hub. The spokes may themselves be formed of fiber strands, so that the hub and the winding frame are easily separable from the finished wound fiber material blank. Also, the spokes may be formed of a different material that may remain in the fiber material blank.
    3a to f show a winding process according to the invention on the winding frame 1 according to the invention. First, a free end 18 of the fiber strand 5 is fastened to the winding frame 1. Subsequently, the winding frame 1 is set in a rotational movement 14 and thus unwinds the fiber strand 5 from the spool 16 and onto the winding frame 1. For this purpose, the coil 16 is moved from a front side 7 of the winding frame 1 in the direction 21 to a rear side 19 of the winding frame 1, wherein the rear side 19 is arranged on the opposite side of the front side 7. In this case, the fiber strand 5 comes in a tooth space 6 on the outer edge 3 of the winding frame 1 for positive engagement.
    Following this, the winding frame 1 according to FIG. 3b undergoes a further rotational movement 14, wherein the rotational movement 14 can be carried out successively successively or continuously. As a result, the fiber strand 5 continues to wind from the spool 16 and onto the winding frame 1. So that in the form of a roving, so an untwisted, juxtaposed fiber strand 5, no unwanted rotation undergoes and thus a weakening of the later produced fiber composite component, the coil 16 is rotated in the direction of rotation 20 about its vertical axis H, so that a uniform planar stringing of the winding frame 1 can be done with the fiber strand 5. 20
    In FIG. 3c and d, the coil 16 is again moved from the rear side 19 of the winding frame 1 to the front side 7 in the direction 21, so that the fiber strand 5 again comes to a positive intermeshing at a further interdental space 6 and thus the winding frame 1 continues to be wound , This step is convincingly shown in Figure 3d.
    According to FIG. 3e, the coil 16 is then again rotated around its vertical axis H by a direction of rotation 20, the direction of rotation 20 according to FIG. 3e being opposite to the direction of rotation 20 according to FIGS. 3b and c. As a result, as already mentioned, twisting of the fiber strand 5 is prevented. The coil 16 is then shown in Figure 3f again moved from a front side 7 of the winding frame 1 to a rear side 19 of the winding frame 1 in the direction 21, so that in turn a renewed positive engagement takes place in a tooth space 6 through the fiber strand 5.
    Figure 4 shows a detailed view of the frame 2, wherein the frame 2 has circumferentially arranged teeth 4 on its outer edge 3. Between the teeth 4 in each case the tooth space 6 is formed, wherein two teeth 4 to each other at a distance 22 to each other. As shown here, it is the tooth tips 23, which have a corresponding distance 22 to each other, in the invention, however, the teeth 4 may also be configured rectangular, so that then the distance 22 from a Zahnflarike 24 to the next tooth edge 24 can be seen. In the pointed teeth 4 shown here, a valley region 25 is formed in the interdental spaces 6. In the valley region 25, the fiber strand 5 settles in such a way that it essentially retains its original width 26, but is not twisted or twisted. As a result, a flat concern of the fiber strand 5 is ensured on the front side 7 shown here, but also on the back 19 of the winding frame 1 over the valley region 25 away.
    5a to c show different embodiments of the teeth 4 on the frame 2. Figure 5a shows tapered teeth 4 with tooth tips 23, wherein between the teeth 4, a valley region 25 is formed. The tooth tips 23 each have a distance 22 to each other. FIG. 5b shows teeth 4 which have a saber-like or else 21-shark-fin-like curvature, wherein a valley region 25 likewise forms between the teeth 4. The tips of the teeth 4 in turn have a distance 22 to each other. The embodiment according to FIG. 5 c shows two pointed teeth 4, wherein the teeth 4 each have a tooth tip 23. Between the two teeth 4, a distance 27 extends on the edge 3, so that takes place in the width of the distance 27 on the edge substantially straight support surface for the fiber strand, not shown.
    6a to d show different winding patterns of a winding frame 1 according to the invention with a fiber strand 5. According to FIG. 6a, the winding frame 1 is wound with the fiber strand 5 in unidirectional direction 28. This means that all fiber strands 5 are oriented in one direction, that is, run parallel to one another. The winding can be made such that there is a gap 29 between the fiber strands 5, as shown here, but the fiber strands 5 can also be wound so tightly on the winding frame 1 that they are arranged without space 29 next to each other or partially overlapping. In the inner region 8 of the winding frame 1 thus created a substantially flat trained fiber material blank 30th
    According to Figure 6b, a winding in two unidirectional directions 28 is possible, in which case the two unidirectional directions 28 are arranged at an angle α to each other. Shown here is an angle α of substantially 90 °, but it is also any angular position of the two unidirectional directions 28 to each other possible. In the context of the invention, it is also possible to form 3, 4 or more unidirectional directions 28. Again, there are gaps 29, which may be formed depending on the type of winding, density of the fiber strand 5 and material as free space or else may be filled by a direct adjacent concerns of the fiber strands 5 to each other.
    FIG. 6 c shows a further embodiment variant as winding possibility of the winding frame 1, in which case the fibers are laid one above the other unidirectionally. Ie. the fibers of front 7 and back of the winding frame 1 are each arranged at an angle to each other, so that a corresponding mehidirektionales braid for in the interior of the winding frame 1 «giving
    22
    Setting fiber material blanks. The density of the fiber material is, in Figure 6c clearly visible, controllable, so that an inner part 31 is completely non-binding and adjust from the inner part 31 to the outer edge 3 extending different fiber densities.
    According to the embodiment in FIG. 6d, the winding frame 1 has been wound around the fiber material in such an eccentric manner that, although an inner part 31 remains free from FIG. 6c, the fiber density shifts to one side and also concentrates there. With a fiber material blank produced in this way, it is possible, for example, to produce a U-shaped fiber composite component which is not shown in more detail, which then has its highest strength in the region of highest density and has, for example, two cantilevers with lower strength requirements. The fiber material blank thus represented in FIG. 6d is optimally adapted to the fiber material vault component to be produced, so that little waste occurs during the production process.
    FIG. 7 a shows a fiber material blank 30 produced on a winding frame 1, which has been converted into a fiber composite material component 32 according to FIG. 7 b. The angle frame 1 of the fiber material blank 30 according to Figure 7a has an outer diameter 10 which is greater than the outer diameter 33 of the winding frame 1 of the fiber composite material component 32 after forming. This is due to a contraction 34 from all sides for targeted tracking of formed in the fiber composite component 32 fiber orientation. By choosing an elastically deformable winding frame 1, either as a lost winding frame 1 or after the cutting of the fiber composite material component 32 can be reused from the winding frame 1, this is also achieved. The winding frame 1 thus serves as a tenter during the forming process.
    This is also shown in Figure 8a to c, which represented the forming process of a fiber material blank 30, which is wound on a winding frame 1 according to the invention. For this purpose, the fiber material blank 30 is inserted and positioned according to Figure 8 in a forming tool 35. Subsequently, the forming tool 35 is closed, so that the outer diameter 10 having a winding frame 1 contracts 34, while a targeted Nachführcn the
    23
    Fibers of the fiber material blank 30 in the mold cavity 36 allows. Thus, a targeted fiber orientation within the forming tool 35 is made possible by the winding frame 1 according to the invention also in the area with local high uniform grades 37.
    After completion of the forming process, shown in Figure 8c, the winding frame 1 has a relation to the original outer diameter 10 reduced outer diameter 33. However, the contracted or reduced outer diameter 33 is dimensioned such that an inner diameter 9 of the winding frame 1 which adjusts thereby is greater than an outer diameter 38 of the forming tool 35. Here, however, according to the invention, it is necessary to coordinate within the production process that the inner diameter 9 which arises during the deformation of the frame is only slightly larger than the outer diameter 38 of the forming tool 35, so that minimized waste or little production residues incurred.
    FIG. 9 shows a fiber material blank 30 according to the invention, wherein the fiber material blank 30 is wound onto a winding frame 1 according to the invention. The winding frame 1 has to a front side 7 and a rear side 19, wherein in each case around the edge 3 of the frame 2, the fiber strands 5 have been wound. This results in the front side 7, a first layer LI and on the back 19, a second layer L2, thus a two-layer fiber material blank 30. Between the layers LI and L2, a core 39 has been wrapped, the core 39, for example, from a packing or may also be formed of a resin material or of a plastic material. The core 39 can then serve during the uniform process as a filler for shaping or else be used by a melting of the resin for a homogeneous matrix resin distribution within the fiber composite component.
    Figures 10a-c show a winding frame 1 with a rectangular contour, wherein within the winding frame 1 of the fiber material blank 30 is also formed with a rectangular contour. Also, the winding frame 1 with a rectangular contour has a peripheral frame 2 with an outer edge 3, wherein on the edge 3 teeth 4 24 are arranged. Also, the rectangularly configured winding frame 1 is wrapped by two unidirectional bevel directions 28, wherein the two unidirectional fiber directions 28 have an angle α to each other, here shown an approximately rectangular angle a. In FIG. 10 c, the rectangularly configured winding frame 1 has been wound with a fiber strand 5 in only one unidirectional direction 28.
    FIGS. 11a to c show in each case 4 winding frames 1 which are positioned one above the other and thus, in FIG. 11c, provide a fiber-woven blank 30 which is formed from 4 winding frames 1 stacked on top of one another in their inner region 8. In the exemplary embodiment according to FIG. 11b, each of the 4 winding frames 1 has a unidirectional orientation 28 of the fiber strands 5 wound on it. This results in a fiber material blank 30 according to FIG. 1 lc, which has 8 layers with 4 unidirectional fiber orientations 28, wherein in each case 2 adjacent layers on a winding frame 1 have the same fiber orientation. By combining with a variety of fiber orientations, for example, with multidirectional or omnidirectional aligned fibers, or also according to Figure 6d with eccentrically arranged fiber densities can be as optimally provide a fiber material blank 30 for the herzu adjusting fiber composite component.
    Reference numerals: 1 - winding frame 2 - frame 3 - edge 4 - teeth 5 - fiber strand 6 - interdental space 7 - front to 1 8 - hmenbereich to 1 9 - inner diameter to 2 10 - outer diameter to 2 11 - winding device 12 - guide rollers 13 - translational direction 14- Rotation 15 - Center point to 1 16 - Spool 17 - Drive roller 18 - Free end to 5 19- Rear 20 - Direction of rotation to 16 21 - Movement of the spool from 7 to 19 or from 19 to 7 22 - Spacing from 4 to 4 23 - Tooth tips 24 - Tooth flanks 25 - Valley region 26 - Width to 5 27 - Distance from 5 to 3 28 - Unidirectional alignment 29 - Space 30 - Fiber material blank
    26 31 - Inner part 32 - Fiber composite component 33 - Outer diameter to 2 after forming 34 - Contraction 35 * Forming tool 36 - Mold cavity 37 - locally high degree of deformation 38 - Outer diameter to 35 39- Kem a- angle LI - first layer L2 - second layer H - vertical axis
    权利要求:
    Claims (19)
    [1]


    1. fiber material blank for producing a fiber composite component (32), preferably for a vehicle, in particular for a motor vehicle, wherein the fiber material blank (30) as provided on a frame fiber strand (5) is formed, characterized in that at least one fiber strand (5) on a winding frame (1) is wound, wherein the winding frame (1) on an outer peripheral edge projections, in particular teeth (4).
    [2]
    2. fiber material blank according to claim 1, characterized in that the fiber strand (5) unidirectionally oriented and / or omnidirectionally oriented wound on the winding frame (1), wherein the same is preferably formed hollow in an inner region (8).
    [3]
    3. fiber material blank according to claim 1 or 2, characterized in that the winding frame (1) has a front (7) and a back (19), wherein on the front (7) or on the back (19) of the winding frame (1) a planar region of the fiber strand (5) is formed or that on the front side (7) and on the back (19) in each case a planar region of the fiber strand (5) is formed, wherein the fiber material blank (30) in particular by the flat region is trained.
    [4]
    4. fiber material blank according to one of claims 1 to 3, characterized in that between the fiber strand sections of the fiber material blank (30) which extend over the inner region (8) of the winding frame (1), a film is wrapped, preferably a thermoplastic film.
    [5]
    5. fiber material blank according to one of claims 1 to 4, characterized in that between the two flat areas in the inner region (8) at least partially a core (39) is wrapped, preferably a core (39) of thermoplastic material, which melts by thermal action ,

    28
    [6]
    6. fiber material blank according to claim 5, characterized in that the core (39) is formed as a mold core, for example, a filling material and / or that the mold core is hollow.
    [7]
    7. fiber material blank according to claim 5 or 6, characterized in that the core (39) is formed as a lost core, preferably of sand and / or wax.
    [8]
    8. fiber material blank according to one of claims 1 to 7, characterized in that the winding frame (1) is formed as a core (39), wherein the winding frame (1) in the inner region (8) is at least partially solid and the winding frame (1) melts in a forming process, wherein the winding frame is preferably formed from a thermoplastic.
    [9]
    9. fiber material blank according to one of claims 1 to 8, characterized in that two winding frames (1) are coupled together, preferably, the two winding frame (1) are flat over each other.
    [10]
    10. fiber material blank according to claim 9, characterized in that the flat areas of the two winding frames (1) are at least partially coupled together, in particular sewn together and / or glued together.
    [11]
    11. fiber material blank according to one of claims 1 to 10, characterized in that mutually different fiber materials are wound on the winding frame (1), preferably from the group of carbon fibers, glass fibers, Aramidfasem, Basaltfasem and / or Metallfasem, wherein in particular two different from each other Fiber materials in an unequal ratio to each other on the winding frame (1) are wound. 29
    [12]
    12. A method for producing a fiber composite component, using a Faserweikstoffrohlings (30) according to at least one of claims 1 to 11, characterized by the following steps: - providing a Faserweikstoffrohlings (30) on a winding frame (1), - inserting the Faserweikstoffrohlings (30) with the winding frame (1) in a forming tool (35), wherein the fiber material blank (30) is provided with a matrix resin before or during the forming processes and / or provided with a melting thermoplastic - uniforms of the fiber material blank (30) to a fiber composite material component (32 ) and - removal of the fiber composite component (32).
    [13]
    13. The method according to claim 12, characterized in that two, in particular three or more, stacked winding frame in the forming tool (35) are inserted and the fiber material blanks are formed simultaneously.
    [14]
    14. The method according to claim 12 or 13, characterized in that the winding frame (1) is removed before and / or during the forming process.
    [15]
    15. The method according to any one of claims 12 to 14, characterized in that the winding frame (1) is contracted by the inwardly pulling fiber strands (5) during the forming process, and preferably serves as a clamping frame.
    [16]
    16. The method according to any one of claims 12 to 15, characterized in that the winding frame (1) has a circumferential groove, wherein during the forming process, a hold-down or a part of the forming tool (35) entering the groove and in the direction of the outside Winding frame (1) cuts off standing part of the fiber material blank (30). 30
    [17]
    17. The method according to any one of claims 12 to 16, characterized in that the winding frame (1) is cut during the forming and / or after the forming, preferably when the forming tool (35) is still closed, or that the winding frame (1) is cut after removal of the molded fiber composite component (32).
    [18]
    18. The method according to any one of claims 12 to 17, characterized in that the over the winding frame (1) guided part of the fiber material is waste, which is preferably not matrix resin and is recycled.
    [19]
    19. The method according to any one of claims 12 to 18, characterized in that the fiber material blank (30) before, during and / or after the forming, preferably in the forming tool (35), heat-treated and / or cured.
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    同族专利:
    公开号 | 公开日
    AT512563A3|2015-12-15|
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    DE102012101724B4|2017-02-23|
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    法律状态:
    2018-04-15| PC| Change of the owner|Owner name: BENTELER SGL GMBH & CO. KG, DE Effective date: 20180305 Owner name: SGL CARBON SE, DE Effective date: 20180305 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102012101724.7A|DE102012101724B4|2012-03-01|2012-03-01|Fiber material blank for the production of a fiber composite material component|
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