• 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 invention relates to an installation for the continuous production of a curved profile preform (5) from flat semifinished products (1) and to a method for this purpose, according to which firstly, sole sections (3a, 3b) by means of a forming device, and then shearing of the semifinished product by means of two rolls (51, 52) which are arranged in a mutually arranged manner. spaced in the conveying direction, after which the web height of the curved profile preform (5) can be varied by means of linearly slidable rollers (62).
    公开号:FR3028201A1
    申请号:FR1560664
    申请日:2015-11-06
    公开日:2016-05-13
    发明作者:Arne Stahl；Henrik Borgwardt；Sascha Dehn
    申请人:Deutsches Zentrum fuer Luft und Raumfahrt eV；
    IPC主号:
    专利说明:

    [0001] The invention relates to an installation for continuously manufacturing a curved profile preform, from flat-fiber semi-finished products, for the manufacture of a composite part reinforced with fibers. The invention also relates to a method for continuously manufacturing a curved profile preform from flat fiber semifinished products for the manufacture of a fiber reinforced composite part. Because of the particularly advantageous property of having, for a relatively low weight, a very high rigidity in at least one direction, the fiber reinforced composite parts are suitable for many purposes of use. Such fiber-reinforced composite parts are thus more and more often used even for load-bearing structures in the automotive and aviation fields, for example in order to save fuel thanks to the reduction in weight obtained. . An example for this purpose is constituted by the frame or the pairs of a load-bearing wing or a fuselage. The fiber-reinforced composite parts are generally made by curing a matrix material, for example a synthetic resin which has been infused into a fiber-based semi-finished product. The fiber-supporting fibers at the base of the fiber-based semifinished product, which are now embedded in the cured matrix material, impart enormous stiffness to the part in the direction of the fibers. To impart the desired geometry to the fiber-reinforced composite part to be subsequently manufactured, the semi-finished product (dry or pre-impregnated) must be made into the desired part form, before complete curing of an injected matrix material. For this purpose, it is first manufactured, especially in the case of complex part geometries, so-called preform elements, which have the later piece geometry or at least are very similar to it. It is then not uncommon to group different preforms to obtain a complete part. Such a preform can then be brought, for example, into a production assembly in which it is injected with matrix material and then the matrix material is hardened in common with the part. Such complex part geometries for example constitute profiles , which most often have an elongated shape, and it is not uncommon for them to be bent in the lateral areas, so also able to take loads outside the direction of the fibers. Examples of this are C-shaped sections or Z-shaped sections. It is not uncommon, particularly in aeronautical construction, for such sections to have a curvature in the longitudinal direction, for example. follow the shape of the plane. Apart from the curvature of such a profile preform, it is not uncommon either that it is required that the entire profile preform have a core height varying along its length, so that for example to achieve integrated fixing points. From DE 10 2012 101 706 A1, there is known a device and method for producing a curved preform, in which one of the flanges of the preform is supported by adhesion against two mutually arranged roll bodies. spaced in the conveying direction and producing shearing of the semi-finished fibers due to a peripheral speed difference. Indeed, thanks to a greater peripheral speed of the roller body arranged later in the transport direction, relative to the previous roller body, the fiber-based semi-finished product fibers undergo a shear defined between the two bodies of roll, so that a prescribed curvature of the preform results in the longitudinal direction. According to the document EP 2 722 145 A1, there is furthermore known a method and a device for manufacturing a preform, in which on the one hand a shear of the fibers is produced by two opposing roller bodies at 30 different peripheral speeds, and on the other hand it is possible to adjust the web height in a variable manner, because the two roll bodies provided on different soles of the profile, are made movable relative to each other. However, this has the disadvantage that both shearing and core pitch change occur during the same process step, which has been shown to be disadvantageous with respect to reproducibility of the process. In addition, in relative movement of the rollers with respect to one another at the same time as shear, the degree of shear may no longer be reliably predictable in the process. However, particularly in the case of load-bearing structures, the deviations from the prescribed set shape are only acceptable within very narrow tolerances.
    [0002] Accordingly, it is an object of the present invention to provide an improved installation and an improved method for making a curved profile preform, reliably allowing for the process, both to impart curvature to the profile preform, to vary or modify a core height during the manufacture of the preform, in such a way that both the curvature and the modification or variation of the core height lead to constant and perfectly reproducible results. According to the invention, the aim is achieved by means of an installation for continuously manufacturing a curved profile preform, from flat-fiber semi-products, for the production of a part. fiber-reinforced composite comprising - a fiber supply and preparation device configured to supply and prepare fiber-based semi-finished products; - a forming device configured to form a first sole section from a first lateral section of the fiber-based semifinished product, and to form a second sole section from a second lateral section; - a shear device having at least two rotating roll bodies arranged in a mutually arranged manner; spaced in a transport direction, and configured to adhesively engage and interact with one of the sole sections such that adjustment of a peripheral speed difference between the roll bodies produces fiber shear between the roll bodies to form the curvature of the profile preform to be manufactured, - a cross-section modification device, which is distinct from the shear device and has a first roller body, in rotation, adhering on the first sole section, and having a second rotating roller body, adhering to the second sole section, at least one of the bodies roller arrangement being arranged movable transversely to the conveying direction, and interacting with the respective sole section so that, by a movement of the roller body transversely to the direction of transport, there is a change in web height of a core section defined between the sole sections, during manufacture of the curved profile preform, and a control device e, adapted to control the shear device for adjusting the peripheral speed difference, and to control the cross section modification device for adjusting the web height of the web section. According to the invention, there is provided an installation for continuously manufacturing a curved profile preform from flat fiber semifinished products, the installation first comprising a device for preparing and supplying configured fibers. to ensure the supply and preparation of semi-finished products. Such a device for supplying and preparing fibers may for example be a roll on which is rolled up the semifinished product based on flat fibers. By means of a transport device, the supplied and prepared semi-finished fiber product is fed to a forming device, configured to form the semi-finished fiber product. During forming, a first shoe section is formed from a first lateral section of the fiber-based semi-finished product, and a second shoe section is formed from a second lateral section of the semi-finished product. fiber base, which allows for the desired profile shape. The forming device is here configured to define the sole sections by bending the lateral sections of the fiber-based semi-product out of the plane of the surface of the fiber-based semi-finished product. As a rule, the sole sections are the two side edges of the fiber-based semi-finished product. Between the two sections of sole is also formed a core section, which connects the two sections of sole. With the aid of a shearing device, the fiber-based semi-finished product is then subjected to shear so as to form the curvature of the profile preforms to be manufactured. For this purpose, one of the sole sections is guided on two rotating roll bodies, arranged mutually spaced in the conveying direction, which support by adhesion against the sole section and produce, due to a set peripheral speed difference, shearing the fibers of the fiber semi-finished product between the two roll bodies. A difference in peripheral speed here means that the two peripheral speeds of the first and second roll bodies are different from each other, in particular such that the second roll body, which in the transport direction is arranged after the first roll body has a faster peripheral speed than the first roll body. With the aid of the shearing device, the fiber-based semifinished product is subjected to a defined shear, in particular in the region of the sole against which the two rollers of the shearing device stick by adhesion, the curvature can be adjusted by varying the peripheral speed difference during the continuous manufacture of the curved preform. Between the roll bodies, the fiber material is subjected to a defined shear and is thus elongated, so that the elongation in one of the soles results in a curvature of the profile. Then, the sheared fiber semifinished product, in particular the shaped and curved profile preform, is fed to a cross-sectional modification device, distinct from the shearing device and also having two rotating roll bodies. . The two roll bodies are here arranged so as to adhere each other against a sole section of the profile preform. Thus, the first roller body of the cross-section modification device is adhesively engageable against the first shoe section, while the second roller body is adhesively supported against the second shoe section. At least one of the roll bodies, and preferably both, is configured to be movable transversely to the conveying direction, particularly perpendicular to the transport direction, so that following a movement of the 1 of the roller body transversely to the conveying direction, the height of the web section defined between the two sole sections can be continuously changed during the manufacturing process. A control device connected both to the shearing device and to the cross-section modification device makes it possible to control, on the one hand, the difference in peripheral speed, and on the other hand the movement transverse to the direction of transport, roller body of the cross-section modification device, so that the adjustable process parameters, curvature and web height, can be continuously adjusted during the forming process. Thus, different profile preforms with different radii of curvature and different web heights can be made in a definite and reproducible manner in a single continuous manufacturing process.
    [0003] By separating the shear from the cross-sectional change, the advantage of effecting the change in the core height is obtained only after completion of the shear defined for the realization of the curvature, so that the two processes can be considered separately from each other as to their boundary parameters. The inventors have found that, despite a curvature imparted to the profile preform, it was still possible to modify the core height of the curved profile preform, without varying the radius of curvature on this occasion and without influencing the shear in the profile preform. partial areas determined. According to an advantageous embodiment, at least one of the roll bodies has a counter-rotating opposite roll body for forming a pair of roll bodies, the respective section of the fiber semi-finished product being guided in the transport direction between the reversing roller bodies of the pair of roll bodies. The adhesion of the fiber-based semi-finished product between the two roll bodies of the pair of roll bodies makes it possible, in particular, to guarantee the transport of the semi-finished product with the least amount of slippage. According to an advantageous embodiment for this purpose, each of the roller bodies of the shearing device and the cross-section modifying device comprises an opposing counter-rotating roller body to form a pair of corresponding roller bodies respectively. , so that the respective sole section is guided between the roller bodies of a respective pair of roller bodies.
    [0004] According to another advantageous embodiment, at least one of the roll bodies, preferably all the roll bodies of the shearing device and the cross-section modifying device, comprises a first roll body section and at least one another, second section of roll body, the first section of roll body having a diameter remaining the same along the length of the section, while the second section of roll body has a variable diameter along the length of the section. This results in the advantage that during transport of the respective sole section on the roller body which is supported by adhesion, it takes into consideration the radius of the folding of the sole section, and thus assists the deformation in particular when changing the web height. For example, it is conceivable that in a pair of roll bodies consisting of two reversing roll bodies, the first roll body of the pair of roll bodies has a projecting flange having a radius corresponding to the radius of the roll. folding the sole section. The second opposing counter-rotating roller body, on the contrary, has a cap which engages in the flange of the opposite roller body, rotating in the opposite direction. A fiber-based semi-finished product guided between them is thus reliably conveyed in terms of the process, as to its folding. According to an advantageous embodiment for this purpose, the peripheral surface of the first section of roll body has a higher coefficient of friction than the peripheral surface of the second section of roll body. For example, it is conceivable that the peripheral surface of the first section of roll body has a material designed for the fiber-based semi-product to be adhesively transported by frictional adhesion. The peripheral surface of the second roll body section, on the other hand, has a material for which the fiber-fiber semi-product is guided by sliding friction, so that a desired slip occurs in this area. . Indeed, due to the variable diameter of the second section of the roller body, there would be friction in this area, resulting in damage to the semi-product based on fibers. Thus, for example, the peripheral surface of the first section of roll body may be made of, or have such a material as, an elastomer or rubber-like material, while the peripheral surface of the second section of roll body may for example be present a metallic material, such as special steel or aluminum. According to another advantageous embodiment, the installation comprises a fiber angle sensor which is configured to detect a fiber angle of the sheared fiber-based semifinished product. The controller is then adapted to adjust the peripheral speed difference as a function of the sensed fiber angle, thereby producing a prescribed curvature of the profile preform. Indeed, the fiber angle makes it possible to draw conclusions about the curvature of the fiber-based material, so that the knowledge of the fiber angle makes it possible to regulate a corresponding con-sign curvature. Such a fiber angle sensor may for example be an optical sensor for which the surface of the sheared fiber-based semifinished product is illuminated by means of light, and the image is recorded. With the aid of a camera, an image processing unit then makes it possible to detect the individual fibers and to determine their angle. Advantageously, the fiber angle sensor is arranged after the shearing device, particularly preferably before the cross section modification device (with reference to the transport direction). The fiber angle sensor can here, in accordance with an advantageous embodiment, be arranged to detect the fiber fiber angle of the sole section against which the roll bodies or pairs are adhered by adherence. of roller body of the shearing device. Thus, the maximum shear angle of the fibers relative to the fiber semifinished product can be determined. According to another advantageous embodiment, the installation 35 comprises a sole strip feeding device, configured for feeding and inserting additional sole strips made of fiber-based material, in at least one section. of sole. With regard to the additional sole strips, these are in particular sole strips with a fiber position at 00, that is to say that the fibers taking up the load are oriented in the longitudinal direction of the profile preform. Since the sole or soles of the profile preform do not inherently lead to such fiber fiber position, otherwise they would not be able to shear, the insertion of additional sole strips with a fiber position of 00 provides a profile preform and a fiber reinforced composite part made therefrom, capable of recovering forces even in the longitudinal direction. In accordance with an advantageous embodiment for this purpose, the sole strip feeding device is configured to feed the additional sole strips of fiber-based material to one of the roll bodies of the cross-section modification device. so that the roll bodies of the cross-section modification device also serve to insert the additional sole strips of fiber-based material into the sole section of the profile preform. With the aid of an activated binder, the additional sole strip can then be fixed locally. According to another advantageous embodiment, the sole strip feeding device can here be configured to adjust a predetermined position of the additional sole strips with respect to the sole height of the respective sole section, so that can adjust different heights. This is particularly advantageous when several profile shapes must be superimposed, because no locally recurrent cavities are then formed in the radii of curvature, which can then lead to a site of rupture in the zone of folding of the sections of sole. According to an advantageous embodiment, after the cross-section modification device, with reference to the transport direction, there is provided a cutting device, configured to cut the final contour of the sole sections of the preform of the curved profile. With the aid of, for example, flying cutting blades, each of the sole sections of the profile preform can be cut to the final contour at an appropriate height. According to another advantageous embodiment, at least one of the The roll of the cross-section modification device is arranged to be able to tilt or pivot in the roll plane, the roll plane being defined by the adherent fiber-based semi-product and the plane of this semi-product. fiber-based. In particular, the configured roller body movable transversely to the transport direction is here designed to be pivotable or tiltable, so that, during a change in web height, the process can be assisted by the tilting or pivoting of the roller body. . Indeed, during a variation of the core height, the fiber-based material must perform, in the sole section, a movement coaxially with the roll bodies, which can be favored correspondingly by pivoting or tilting. of the roller body respectively considered.
    [0005] According to another advantageous embodiment, it is also conceivable in a pair of roll bodies, that the two roll bodies are arranged and designed to pivot or tilt simultaneously, so as not to hinder the transport process.
    [0006] According to another advantageous embodiment, it is also possible to use a fiber-based semi-product detection device to read a position information of the fiber-based semi-product during shear and / or or during the cross-sectional modification, pivoting or tilting of one of the shear roller body and / or the cross-section modification device for controlling a set position during continuous forming of the preform . According to another advantageous embodiment, there is further provided, between the fiber supply and preparation device and the forming device, a feed device which transports the flat fiber semifinished product supplied and prepared consistently throughout the width of the fiber-based semi-product to the forming device and / or the shearing device, which is permitted in particular by means of rollers applied flat and on the entire width. Such an advance device makes it possible to have a fiber angle that remains always the same up to the forming device or to the clogging device, so that the shear can start with defined and reproducible boundary conditions. In accordance with the invention, the object of the invention is furthermore achieved by means of a process for continuously manufacturing a curved profile preform from flat-fiber semi-finished products in order to manufacture a reinforced composite part. of fibers, comprising the following steps: - supplying and preparing a semi-finished product based on flat fibers, - forming the semi-finished product based on flat fibers so that a first section of sole is formed from a first section side of the fiber-based semi-finished product, and a second sole section from a second lateral section of the fiber-based semi-product, - shearing the fiber-based semi-finished product, as two bodies of rotating roller, arranged at a distance from one another in a conveying direction, press against one of the sole sections, and a peripheral speed difference between the two roller bodies is adjusted of such that shearing of the fibers between the roll bodies occurs to form the curvature of the profile preform to be manufactured, and then - modifying a web height of a web section defined between the sole sections because two roll bodies each adhere to each other against a sole section, and at least one of the roll bodies is moved transversely to the conveying direction so as to adjust a prescribed web height.
    [0007] According to an advantageous embodiment of the method, a fiber angle of fiber-shear semi-product is detected by means of a fiber angle sensor, the peripheral speed difference being adjusted during shearing the fibers, depending on the detected fiber angle, to produce a prescribed curvature of the profile preform. According to an advantageous embodiment of the method, additional insole strips of fiber-based material are inserted in at least one sole section.
    [0008] According to an advantageous embodiment for this purpose, a prescribed position of the additional sole strips is set with respect to the sole height of the respective sole section.
    [0009] According to an advantageous embodiment of the method, it is carried out by means of a cutting device, a cut to the final contour of the sole sections.
    [0010] According to an advantageous embodiment of the method, during the modification of the web height by moving at least one of the roll bodies transversely to the direction of transport, the roll body is pivoted or tilted in a plane fiber-based semi-finished product defined by the fiber-based semi-finished product adhering thereto. The invention will be explained in more detail, by way of example, with reference to the accompanying drawings. These show: Figure 1 schematic representation of the installation according to the invention; Figure 2 schematic representation of a pair of roll bodies; perspective representation of a preform profile.
    [0011] Figure 1 shows schematically the installation according to the invention, for the manufacture of a curved profile preform. The profile preform comprises or consists of a fiber-based material used in the manufacture of fiber-reinforced composite parts, infusing a matrix material into the fiber-based material, and then curing the matrix material. The curved profile preform here has, in cross-section, respective sole sections, which are bent from a central core section. A curvature must be imparted to the preform in the longitudinal direction. Such profiles may for example be C or Z-shaped profiles. The installation 10 according to the invention, for the manufacture of such a curved profile preform from semi-finished products based on flat fibers, FIG. has a fiber preparation and supply device 20, which comprises a roller 21 on which the flat fiber semifinished product 1 is supplied to the plant 10.
    [0012] The roller 21 is rotated by means of a motor 22, so that the flat fiber semifinished product 1 is brought with the least possible tension to the following individual stations of the installation 10. In order to to compensate for the fluctuations of the feeding speed, the roller 21 is followed, in the transport direction F, by a dancer roll 23, which by means of a compensation by displacement in height, standardizes and synchronizes the supply. The dancer roll 23 can be detected by a sensor system, so that the motor 22 of the fiber delivery and preparation device 20 can then be controlled according to the detected height displacement.
    [0013] In this manner, the flat fiber semifinished product 1 is supplied to the feeder 30. The feeder 30 comprises a feed roller 31 extending the full width of the fiber semifinished product. plate 1, which brings the flat fiber semifinished product to the forming device 40 in a constant and uniform manner over the entire width. With the feed roller 31 extending over the entire width of the flat fiber semifinished product 1, the feeding of the flat fiber semifinished product 1 to the forming device 40 is accordingly always effected with the same fiber angle remaining the same across the full width of the flat fiber semifinished product, so that both the forming and the following shear can start from constant boundary conditions for the fiber angle. By means of the forming device 40, the lateral sections 2a, 2b of the semifinished product based on flat fibers 1 are bent, so as to form corresponding insole sections 3a, 3b. The forming is performed here by means of the forming device 40 so that the lateral sections 2a, 2b of the flat fiber semifinal product 1 are bent so as to define a core section 4 between the sole sections 3a, 3b having been trained. The forming can here be carried out by means of rollers or guiding rails or the like. The thus-formed fiber semifinished product 1 is now fed to the downstream shearing device 50 which has two pairs of roll bodies 51 and 52 arranged spaced apart in the conveying direction F. considered sole section, namely the sole section 3a in the example of Figure 1, is here guided and passes between the roller bodies pairs of roll bodies, the sole portion 3a bearing by adhesion against the the roller bodies of the two pairs of roller bodies 51 and 52. The roller bodies of the two pairs of roller bodies 51 and 52 rotate here with different peripheral speeds, so that it is established between the roller bodies of the pair of roller bodies 51 and the roller bodies of the pair of roller bodies 52, a peripheral speed difference, which results in shearing of the fibers of the fiber-based semi-product 1 between the pairs of roll bodies Water 51 and 52. The shear is here the most important in the sole section 3a against which the pairs of roll bodies 51 and 52 stick by adhesion, and propagates by decreasing uniformly towards the opposite sole section 3b, where the shear is the weakest, if not nonexistent. On the opposite sole section 3b, a pair of additional roll bodies 53, which is adhesively supported on the second sole section 3b, and preferably rotates at the same peripheral speed as the first pair of roll body 51 of the first sole section 3a.
    [0014] Shearing the fiber-based material between the two roll bodies 51 and 52 imparts to the fiber-based semi-product 1 in the longitudinal direction a defined curvature which ultimately depends on the peripheral speed difference of the two pairs of body members. roller 51 and 52.
    [0015] The thus-sheared semi-finished fiber product is now fed to a cross-sectional modification device placed downstream of the shearing device 50, with reference to the transport direction F. The cross-section modification device 60 comprises at least two pairs of roll bodies 61 and 62. The first pair of roll bodies 61 is adhesively supported by its roll bodies against the first sole portion 3a. The second pair of roll bodies 62 adheres with its roll bodies against the second sole section 3b. At least the pair of roll bodies 62 is here arranged movable transversely to the transport direction F, so as to be able to change the distance between the pair of roll bodies 61 and the pair of roll bodies 62. More specifically, the pair In the embodiment of FIG. 1, the roller body 62 is made movable away from the core section 4 of the fiber semi-product 1 or towards it. It is thus possible to modify the core height of the core section 4 so as to be able to produce curved profile preforms with a variable core height. The web height is here defined as the extent between the first sole section 3a and the second sole section 3b. Then, the curved profile preform is fed to a cutting device 70, which cuts the final contour of the sole sections 3a, 3b so that they have a substantially identical core height or a different value. defined. The whole of the installation 10 is controlled by means of a control device 80. The control device 80 is connected in particular to the shearing device 50 and to the cross-section modification device 60, and is configured for one hand adjust the peripheral speed difference between the two pairs of roll bodies 51 and 52 according to a prescribed set curvature, and secondly also control the movement of said at least one pair of roll bodies 62 of the device cross-sectional modification 60 to thereby adjust the desired target core height of the web section 4. The installation 10 may include a fiber angle sensor 55, which is mounted downstream of the two pairs of webs. roller body 51 and 52, and detects a fiber angle of the sheared fibers in the first shoe section 3a. With respect to the thus-detected fiber angle of the sheared fibers, the controller 80 can then adjust the peripheral speed difference between the two pairs of roll bodies 51 and 52 so as to achieve the desired curvature. . Indeed, the curvature of the preform depends directly on the fiber angle of the fibers having undergone shearing. Furthermore, it can be provided a sole strip supply device 90, which inserts into the outer sole 3a (first sole section) an additional sole strip made of fiber material with a zero degree position of the reinforcing fibers. through the pair of roller bodies 61 of the cross-section modification device 60.
    [0016] It is possible on this occasion, by adduction of heat, to activate, for example, a material forming a binder, so that the additional sole strip 91 is fixed externally on the first sole section 3a. Figure 2 schematically shows the pair of roll bodies 62, forming part of the cross-section modification device 60, and which is further provided for varying the web height, by linear displacement. The pair of roll bodies 62 comprises two roll bodies 62a and 62b rotating in opposite directions. The second sole section 3b is adhesively supported on the roll bodies between the two roll bodies 62a and 62b. A linear motor 63 makes it possible to move the two roll bodies 62a and 62b transversely to the direction of transport of the semi-finished product based on fibers. Thus, a displacement of the pair of roll bodies 62 to the left results in decreasing the height of the sole section 3b and sliding the fiber-based semi-product upwardly relative to the roll bodies 62a and 62b. In this case the core height is increased. In the case of a shift to the right, the fiber-based semi-product slides downward, resulting in the enlargement of the sole section 3b and decreases the core height. The two roll bodies 62a and 62b have a first roll body section 64a and a second roll body section 64b. The first roll body section 64a here has a diameter remaining substantially constant along the entire length of the roll body section 64a, so that the roll body section 64a of the roll body 62a has a cylindrical shape with a constant cross-section. . At the upper end of the roll body 62a is the second roll body section 64b which has a variable diameter, which leads to a kind of flange on the roll body 62a. Correspondingly thereto, on the roll body 62b is formed a kind of cap in the region of the second roll body section 64b.
    [0017] Due to the variable diameter of the second section of roll body 64b, the formation of the radius of curvature of the semi-finished product, which defines the transition from the core section 4 to the sole section 3b, is completed. This allows on the one hand to additionally assist the forming process as such, and in addition to prevent the fiber-based material from breaking due to too small a radius of curvature. The first section of roller body 64a, with a constant diameter, has here a peripheral surface having a very high coefficient of friction, which allows the sole section 3b to be guided without slipping or with the smallest possible slip between them. two roll bodies 62a and 62b. Such a material may for example be rubber. The second section of the variable diameter roller body 64b, on the other hand, has a peripheral surface with a very low coefficient of friction, thereby enabling the fiber-based semi-product to be guided with slip friction in this area. Such a peripheral surface may for example be made of special steel. In order to assist the pitch modification process, it is advantageous that during transverse displacement to the conveying direction, the pair of roll bodies 62 simultaneously tilts or pivots in the transport direction, or opposite to the direction of transport (in the example of Figure 2 outside the representation plane), thus assisting the vertical orientation transport of the sole portion 3b between the two roll bodies 62a and 62b. But it is also conceivable that other pairs of roll bodies of the installation 10 are made tilting or pivoting, this in the plane of the semi-product based on fibers of the part of semi-product based on fibers which It applies thereto to thereby allow controlled height control of the preform along the pairs of roll bodies. For this purpose, it is conceivable to record, by means of a sensor, for example of a laser optical cutting sensor, the position of the preform, then to control, depending on the position of the preform, the pairs of roller for pivoting or tilting thereof so as to regulate a prescribed setpoint position of the preform during continuous forming of the preform.
    [0018] The principle of constructing a pair of roll bodies, as shown in FIG. 2, can also be transposed to all other pairs of roll bodies of the installation 10, so that the pairs of roll bodies 51 , 52, 53 and 61 may be of a construction mode corresponding to the same principle as that shown in Figure 2. Figure 3 shows schematically the curved profile preform 5 whose manufacture is complete and having a first section of sole 3a as an outsole, a second sole section 3b as an insole, and a core section 4 located between the two previous ones, the core height h increasing from left to right. A profile preform thus curved with a complex cross section over the entire length, can be manufactured according to a reliable process thanks to the installation according to the invention and to the process according to the invention.
    [0019] 20 Nomenclature of marks 1 semi-finished product based on flat fibers 2a first lateral section 2b second lateral section 3a first section of sole 3b second section of sole 4 section of core 5 preform of curved profile 10 installation 20 device for supply and preparation of fiber 21 semi-finished fiber-product roll 22 fiber feeder and preparation apparatus 23 dancer roller 30 feed device 31 feed roller 40 forming device 50 shearing device 51 first pair of dies roll 52 second pair of roll bodies 53 pair of additional roll body 55 fiber angle sensor 60 cross section modification device 61 first pair of roll body 62 second pair of linearly displaceable roll body 70 cutting device 80 control device 90 sole strip feeding device 91 additional sole strips 62a, 62b roller body of the second pair of linearly displaceable roller body 64a first section of roller body 64b second section of roller body
    权利要求:
    Claims (17)
    [0001]
    1. Installation (10) for continuously manufacturing a curved profile preform (5), from flat semifinished products (1), for the manufacture of a composite fiber-reinforced part, comprising - a fiber supply and preparation device (20) configured to supply and prepare the fiber-based semi-products (1), - a forming device (40) configured to form a first section of fibers sole (3a) from a first lateral section (2a) of the fiber-based semi-finished product (1), and to form a second sole section (3b) from a second lateral section (2b), a shearing device (50) having at least two rotating roller bodies, arranged spaced apart in a transport direction, and configured to abut against one of the sole sections (3a, 3b); and interact with it in such a way that the setting a circumferential velocity difference between the roll bodies produces fiber shear between the roll bodies to form the curvature of the profile preform (5) to be manufactured, a cross section modification device (60), which is distinct from the shear device (50) and has a first rotating roll body adhering to the first sole section (3a) and having a second rotating roll body adhesively pressing on the second sole section (3b), at least one of the roller bodies being arranged movable transversely to the transport direction, and interacting with the respective sole section (3a, 3b) so that, by a movement of the roller body transversely to the conveying direction, there is a change in web height of a web section (4) defined between the sole sections (3a, 3b), during the manufacture of the pref curved profile elm (5), and - a control device (80), adapted to control the shear device (50) for adjusting the peripheral speed difference, and for controlling the cross section modification device (60). ) for adjusting the web height of the web section (4).
    [0002]
    2. Installation according to claim 1, characterized in that at least one roller body is arranged an opposite roller body, rotating in opposite direction, to form a pair of roller bodies (51, 52, 61 62), the respective section of the fiber-based semifinished product being guided in the conveying direction between the counter-rotating roll bodies of the pair of roll bodies (51, 52, 61, 62).
    [0003]
    3. Installation according to claim 2, characterized in that each roller body of the shearing device (50) and the cross-section modifying device (60) has a counter-rotating opposite roller body to form a pair. respective roller bodies (51, 52, 61, 62).
    [0004]
    4. Installation according to one of the preceding claims, characterized in that at least one of the roll bodies has a first section of roll body (64a) and at least a second section of roll body (64b), the first section of roll body (64a) having a diameter remaining the same along the length of the section, while the second section of roll body (64b) has a variable diameter along the length of the section.
    [0005]
    5. Installation according to claim 4, characterized in that the peripheral surface of the first section of roll body (64a) has a coefficient of friction higher than the peripheral surface of the second section of roll body (64b). 30
    [0006]
    6. Installation according to one of the preceding claims, characterized in that there is provided a fiber angle sensor (55) configured to detect a fiber angle of the fiber-based semi-finished product (1) which has undergone the shear, the controller (80) being arranged to adjust the peripheral velocity difference as a function of the sensed fiber angle, to produce a prescribed curvature of the profile preform (5).
    [0007]
    7. Installation according to one of the preceding claims, characterized in that there is provided a sole strip supply device (90), 5 configured for the supply and insertion of additional sole strips (91). of fiber material in at least one sole section (3a, 3b).
    [0008]
    8. Installation according to claim 7, characterized in that the device for supplying the sole strip (90) brings the additional sole strips (91) to the first and / or second roll body of the section modification device. cross-section (60), and inserts the additional sole strips (91) into the respective sole section (3a, 3b) via the first and / or second roll body 15 of the cross-section modification device (60). ).
    [0009]
    An installation according to claim 7 or 8, characterized in that the sole strip supplying device (90) is configured to adjust a predetermined position of the additional sole strips (91) with respect to the sole height of the respective sole section (3a, 3b).
    [0010]
    10. Installation according to one of the preceding claims, characterized in that there is provided a cutting device (70), configured to cut the final contour of the sole sections (3a, 3b) of the profile preform 25. (5) curved.
    [0011]
    11. Installation according to one of the preceding claims, characterized in that at least one of the roll bodies of the cross-section modifying device (60) is configured to be able during rotation transverse to the transport direction to rotate or to switch to a fiber-based semi-finished product plane defined by the fiber-based semi-finished product (1) adhering to it.
    [0012]
    A method for continuously manufacturing a curved profile preform (5) from flat fiber-based semi-products (1) for the manufacture of a fiber-reinforced composite part, comprising the steps of: supplying and preparing a flat semifinished product (1), - forming the flat semifinished product (1) so that a first sole section (3a) is formed from a first section lateral (2a) of the fiber-based semi-finished product (1), and a second sole section (3b) from a second lateral section (2b) of the fiber-based semi-finished product (1), - shearing the fiber-based semifinished product (1), since two rotating roll bodies, arranged at a distance from one another in a conveying direction, bear by adhesion against one of the sections of sole (3a, 3b), and that a peripheral speed difference between the two roll bodies is set so that it occurs shearing the fibers between the roll bodies to form the curvature of the profile preform (5) to be manufactured, and then - modifying a web height of a web section (4) defined between the sole sections (3a, 3b), because two roll bodies adhere each to a sole section (3a, 3b) respectively, and at least one of the roll bodies is displaced transversely to the direction of transport of the to adjust a prescribed web height.
    [0013]
    Method according to claim 12, characterized in that by means of a fiber angle sensor (55), a fiber angle of the sheared fiber-based semifinished product (1) is detected, the peripheral speed difference being set, during fiber shearing, as a function of the detected fiber angle, to produce a prescribed curvature of the profile preform (5).
    [0014]
    14. The method of claim 12 or 13, characterized in that one inserts additional sole strips (91) of fiber-based material in at least one sole section (3a, 3b).
    [0015]
    15. A method according to claim 14, characterized in that one sets a prescribed provision of additional sole strips (91) relative to the sole height of the respective sole section (3a, 3b).
    [0016]
    16. Method according to one of claims 12 to 15, characterized in that it is carried out, by means of a cutting device (70), a cut to the final contour of the sole sections (3a, 3b).
    [0017]
    Method according to one of claims 12 to 16, characterized in that during the modification of the web height by displacement of at least one of the roll bodies transversely to the direction of transport, is rotated or tilting the roll body into a fiber-based semi-finished product plane defined by the fiber-based semi-finished product (1) adhering thereto by adherence.
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    同族专利:
    公开号 | 公开日
    US20170312940A1|2017-11-02|
    EP3215336B1|2019-04-24|
    WO2016071451A1|2016-05-12|
    EP3215336A1|2017-09-13|
    FR3028201B1|2019-08-09|
    DE102014116270B3|2016-01-21|
    ES2736119T3|2019-12-26|
    US10792838B2|2020-10-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB0813161D0|2008-07-18|2008-08-27|Airbus Uk Ltd|Ramped stiffener and apparatus and method for forming the same|
    GB0813146D0|2008-07-18|2008-08-27|Airbus Uk Ltd|Ramped stiffener and apparatus and method for forming the same|
    DE102012101706B4|2012-03-01|2015-07-02|Deutsches Zentrum für Luft- und Raumfahrt e.V.|Curved preform|
    EP2722145B1|2012-10-17|2016-02-24|Airbus Operations GmbH|Method and device for manufacturing a dry textile preform|
    DE202014100927U1|2014-02-28|2014-04-01|Deutsches Zentrum für Luft- und Raumfahrt e.V.|Production of curved preforms|DE102015109864B4|2015-06-19|2018-10-18|Deutsches Zentrum für Luft- und Raumfahrt e.V.|Plant and method for producing a curved, multi-layer preform made of fibers of a fiber composite material|
    US20180327071A1|2017-05-10|2018-11-15|The Boeing Company|Systems and methods for aircraft integrated composite frames|
    CN111203996A|2019-12-13|2020-05-29|中国航空工业集团公司基础技术研究院|Preparation equipment and method for prefabricated body with bent section|
    法律状态:
    2016-10-17| PLFP| Fee payment|Year of fee payment: 2 |
    2017-10-18| PLFP| Fee payment|Year of fee payment: 3 |
    2018-03-09| PLSC| Publication of the preliminary search report|Effective date: 20180309 |
    2018-10-17| PLFP| Fee payment|Year of fee payment: 4 |
    2019-10-29| PLFP| Fee payment|Year of fee payment: 5 |
    2020-10-23| PLFP| Fee payment|Year of fee payment: 6 |
    2021-10-25| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014116270.6A|DE102014116270B3|2014-11-07|2014-11-07|Plant and method for the continuous production of curved preforms|
    DE102014116270.6|2014-11-07|
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