• 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:
    A support tool (100) includes a mandrel (110) having an outer surface (111) on which a band-shaped fibrous texture is to be wound. The tooling further includes an extender (120) having a flexible band (121) extending a predetermined length between a first end (1210) attached to the mandrel (110) of the support tool (100) and a second free end (1211) comprising a fastening system (130) adapted to hold the end of the fibrous texture in the form of tape to be wound.
    公开号:FR3040653A1
    申请号:FR1558254
    申请日:2015-09-07
    公开日:2017-03-10
    发明作者:Erwan Camus；Dominique Marie Christian Coupe
    申请人:Safran SA；SNECMA SAS；
    IPC主号:
    专利说明:

    Background of the invention
    The present invention relates to the production of composite parts of revolution material and more particularly the production and winding of fibrous textures for constituting the fibrous reinforcement of such parts.
    The field of application of the invention is more particularly the production of parts of revolution made of structural composite material, that is to say parts of structure with fiber reinforcement and densified by a matrix. The composite materials make it possible to produce parts having a lower overall mass than these same parts when they are made of metallic material.
    In the case of a piece of revolution shape, such as for example an aircraft engine casing, the fiber preform intended to form the reinforcement of the part is made from a fibrous texture wound on a support tool.
    More specifically, as illustrated in FIG. 1, a web-like fibrous texture is woven in one piece by three-dimensional (3D) or multilayer weaving between a plurality of warp yarn layers. The 3D or multilayer weave of the fibrous texture 10 is made in a loom 20 of Jacquard type, the weaving of inserting weft yarns 12, creating a pattern, between warp yarns 11. At its exit from the loom In weaving 20, the fibrous texture 10 is wound on a support tooling 30 comprising a mandrel 31 having an outer surface 31a on which the fibrous texture 10 is wound.
    A fibrous preform is then made by tensioning the fibrous texture 10 on a molding tool. As illustrated in FIG. 2, intermediate conveying rollers 40 and 50 are used to homogenize the tension over the width of the fibrous texture 10 during its tensioning winding on a molding tool 60, the texture 10 being unwound from the Support tooling 30. The molding tool 60 comprises a mandrel 61 on the outer surface of which the fibrous texture 10 is wound under tension, said outer surface having a shape corresponding to the composite material part to be produced. The fibrous texture 10 is held on the mandrel 31 of the molding tool 60 by means of a shoe 62 which is removed between each turn in order to be able to make the next winding turn. At the end of the winding, that is to say after several turns of the fibrous texture 10 on the mold tooling 60 so as to form a fibrous preform 80, the pad 62 is again positioned so to maintain the preform 80 in place and prevent it from unwinding when cut by a knife 70 as shown in Figure 3.
    Once the fiber preform 80 has been made in this way, injection sectors (not shown in FIG. 3) are positioned around the molding tool 60 in order to impregnate the preform with a precursor resin of the matrix.
    This winding solution has drawbacks. Indeed, the use of intermediate conveyor rolls requires to provide an over-length in the fibrous texture because the fibrous texture must be kept permanently under tension until the end of its winding on the molding tool. As shown in FIG. 3, an excess length of the fibrous texture 10 is present between the support tooling 30 and the molding tool 60 at the end of the winding to allow the fibrous texture 10 to be held under tension. The over-length 15 is woven in the continuity of the texture 10 used to make the preform 80. The beginning of the weaving of the fibrous texture 10 corresponding to the end of the winding, the over-length 15 is woven at the beginning of the fibrous texture 10 and fixed on the support tooling 30.
    The over-length being bonded to each fibrous texture, it is eliminated as soon as the preform 80 is cut. The over-length 15 is then lost because it can not be reused. This loss of material increases the manufacturing cost of the preform and the resulting composite material part.
    Object and summary of the invention
    It is therefore desirable to have a solution for producing fiber preforms by winding which does not have the aforementioned drawbacks. For this purpose, according to the invention, there is provided a support tool comprising a mandrel having an external surface on which a fibrous texture in the form of a strip is intended to be wound, characterized in that it further comprises an extension comprising a flexible band extending over a predetermined length between a first end fixed to the mandrel of the support tool and a second free end comprising a fastening system adapted to hold the end of a band-shaped fibrous texture to wind up.
    Thanks to the extension of the support tool of the invention, the excess length of the fibrous texture, usually used to maintain the tension between the support tooling and the molding tool at the end of the winding and sacrificed during the cut of the preform, is no longer necessary, it being replaced by the extension. In addition, the extender can be reused for the formation of new fibrous preforms.
    According to one aspect of the support tool of the invention, the flexible band of the extension consists of a woven strip of yarn made of a material chosen from at least one of the following materials: poly (p-phenyleneterephthalamide) (PPD- T) better known as Kevlar®, intermediate modulus carbon, poly (imino-1,3-phenyleneiminocarbonyl-1,3-phenylenecarbonyl) better known as Nomex®, glass.
    According to a particular feature of the support tool of the invention, the fastening system comprises two flanges connected to one another by a hinge so as to form a movable jaw between an open position in which the flanges are moved away. one of the other and a closed position in which the flanges are clamped one opposite the other. One of the flanges may further comprise pins on its face facing the other flange to improve the maintenance of the fibrous texture.
    According to an alternative embodiment of the fastening system, it further comprises one or more intermediate clamping elements present between the two flanges. Each intermediate clamping element may have rough surfaces. The invention also relates to a method for producing a reinforcing fibrous texture of a composite material of revolution comprising the one-piece weaving by three-dimensional weaving or multilayer between a plurality of layers of son of a texture fibrous web-like material and winding said texture onto a support tool comprising a mandrel having an outer surface on which the fibrous texture is wound, characterized in that the support tool further comprises an extension comprising a flexible band extending over a predetermined length between a first end secured to the mandrel of the support tool and a second free end comprising an attachment system holding one end of the band-like fibrous texture as it winds on the support tooling.
    According to a particular characteristic of the process for producing the fibrous texture of the invention, the fastening system comprises two flanges connected to one another by a hinge, the end of the fibrous texture being held between the two flanges during its winding on support tooling.
    According to another particular feature of the process for producing the fibrous texture of the invention, the fastening system further comprises one or more intermediate clamping elements present between the two flanges and the end of the fibrous texture comprises a distal portion. wherein at least a portion of the yarn layers are woven without bonding with the other layers of yarns of said texture, each non-bonded woven layer being held between a flange and an intermediate clamping member or between two intermediate clamping elements of the fastening system. 'attached. The subject of the invention is also a process for producing a fibrous preform of revolution comprising the production of a fibrous texture according to the process for producing a fibrous texture of the invention, the process for producing a fibrous preform revolution comprising tensioning said texture on the outer surface of a mandrel of a molding tool so as to obtain a fibrous preform of revolution.
    BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the invention will emerge from the following description of particular embodiments of the invention, given by way of non-limiting example, with reference to the appended drawings, in which: FIG. 1 is a schematic view showing the weaving and storage on a support tool of a strip-shaped fibrous texture according to the prior art, FIGS. 2 and 3 are schematic side views showing the formation of a fibrous preform of revolution by tension winding of the fibrous texture of FIG. 1, FIG. 4 is a schematic side view showing a support tool according to one embodiment of the invention, FIG. 5 is an exploded diagrammatic perspective view showing a device for fixing an extension of the support tool of FIG. 4, FIG. 6 is a side diagram showing an attachment system of the extension of the support tool of FIG. 4, FIGS. 7 and 8 are schematic side views showing the formation of a fibrous preform of revolution by tension winding of a fibrous texture previously wound on the tool of 4, FIGS. 9 and 11 are schematic side views showing an alternative embodiment of the attachment system of the extension of the support tool of the invention, FIG. 10 is a diagrammatic view showing a fibrous texture whose weave is adapted to its end for the fastening system of Figures 9 and 11.
    DETAILED DESCRIPTION OF EMBODIMENTS The invention is generally applicable to the production of revolution parts made of composite material such as aircraft engine casings, for example fan casings, these parts being obtained by embodiment of fibrous preforms of revolution by winding and densification of these preforms with a matrix. These parts such as aircraft engine casings are large, for various ranges of these engines type aircraft propulsion turbomachines, these casings may have a diameter of the order of one meter up to three meters.
    According to the invention and as described hereinafter in detail, the present invention proposes to use a support tool equipped with an extension allowing the tensioning of a fibrous texture during its shaping without being tensioned. loss of material.
    The method for producing a fibrous texture according to the invention starts with the formation of a fibrous texture in the form of a band which is then wound on a support tool. The fibrous texture is here intended to form a fibrous preform of an aircraft engine casing.
    The fibrous texture is obtained by three-dimensional weaving (3D) or multilayer made in a known manner by means of a jacquard loom on which a bundle of warp yarns or strands has been arranged in a plurality of layers, the yarns of chains being linked by weft threads. In the example described here, the multilayer weave is an "interlock" weave. "Interlock" weaving is here understood to mean a weave in which each layer of weft threads binds several layers of warp yarns with all the threads of the same weft column having the same movement in the plane of the weave. . Other known types of multilayer weaving may be used, such as those described in document WO 2006/136755.
    The fibrous texture according to the invention is woven from yarns such as in particular, but not exclusively, yarns of carbon fibers, of ceramics such as silicon carbide, or even of glass.
    Fig. 4 illustrates a support tool 100 according to an embodiment of the invention which comprises a mandrel 110 having an outer surface 111 on which a band-shaped fibrous texture is to be wound. The support tooling 100 further comprises an extension 120 comprising a flexible band 121 extending over a predetermined length between a first end 1210 fixed to the mandrel 110 of the support tool and a second free end 1220 comprising a delivery system. 130 attachment adapted to maintain the end of a fibrous texture in the form of tape to wind. The end of the flexible band is fixed on the support tool preferably with a fastening system that does not create extra thickness on the surface of the mandrel of the support tool. In the embodiment described here and as shown in FIG. 5, the mandrel 110 has on its outer surface 111 a recess 112 making it possible to house a fastener 150 of the first end 1210 of the flexible band 121 and to integrate the one to the geometry of the mandrel without extra thickness. The fastening device 150 here consists of a fastening plate 151 having a shape complementary to that of the recess 112 and fixing members 152 of screw type, the plate 151 further comprising a plurality of orifices 1510 for the passage of the fasteners 152. The end 1210 of the flexible band 121 comprises a plurality of holes 1211 reinforced by eyelets 1212, the position of the orifices 1211 coinciding with that of the orifices 1510 formed in the attachment plate 151. L 1210 end of the strip 121 of the extension 120 is held between the plate 151 and the bottom of the recess 112 by clamping the fasteners 152 in holes 1120 provided with a thread cooperating with the thread of the fasteners 152 (not shown in Figure 5). Those skilled in the art will consider without difficulty other embodiments of the fastening device of the end of the strip on the mandrel of the support tool.
    The band 121 of the extension 120 may be made of any flexible material having a very low elongation rate and resistant to the tension forces applied during the winding of the fibrous texture on the molding tool. By way of non-limiting example, the band 120 may consist of a band obtained by weaving yarns into one of the following materials: poly (p-phenyleneterephthalamide) (PPD-T) better known as Kevlar®, carbon with intermediate modulus, poly (imino-1,3-phenyleneiminocarbonyl-1,3-phenylenecarbonyl) better known as Nomex®, glass.
    In the embodiment described here and as shown in Figure 6, the fastening system 130 comprises two flanges 131 and 132 interconnected by a hinge 133 secured to the end 1211 of the band 121. The flanges 131 and 132 thus forming a jaw movable between an open position in which the flanges 131 and 132 are spaced from each other (Figure 6) allowing the insertion of an end of a fibrous texture to maintain and a position of closure (Figure 7) in which the flanges 131 and 132 are clamped against each other for example by means of screws (not shown in Figure 7) so as to trap and hold the end of the fibrous texture to be wound .
    In order to prevent slippage of the texture between the two flanges 131 and 132, one of the two flanges, here the flange 131, may be provided with pins 1310, the other flange, here the flange 132, may comprise recesses 1320 receiving the tip of the pins 1310 when the two flanges are tight. If the flanges 131 and 132 have large dimensions, they preferably have a curved shape corresponding to that of the mandrel of the support tool as shown in FIG. 6.
    There is now described a method of producing a fibrous preform of revolution by tensioning a fibrous texture on a molding tool.
    Figures 7 and 8 show the production of a fibrous preform 280 obtained from a fibrous texture 210 woven in a 3D weave or multilayer. As already described above in connection with FIGS. 2 and 3, the fiber preform is made by tensioning the fibrous texture 210 on a molding tool 260, intermediate conveying rollers 240 and 250 being used to homogenize the tension on the width of the fibrous texture during its winding under tension on a molding tool 260, the fibrous texture being unwound from the support tool 100 (Figure 7). The molding tool 260 comprises a mandrel 261 on the outer surface of which the fiber texture is wound under tension, said outer surface having a shape corresponding to the piece of composite material to be produced. At the end of the winding as shown in Figure 8, that is to say after the completion of several turns of the fibrous texture on the molding tool 260 so as to form a fibrous preform 280, a skid 262 is positioned to hold the preform 280 in place and prevent it from unwinding when cut by a knife 270.
    The cut is made just in front of the free end of the flanges 131 and 132 of the fastening system 130 of the extension 120, which makes it possible to avoid any loss of material in the fibrous structure 210 used to produce the preform 280. Indeed, the over-length of the fibrous texture, usually necessary to maintain the tension between the support tooling and the molding tool at the end of the winding and sacrificed during the cutting of the preform, is here replaced by the extension 120. In addition, the extension 120 can be reused for the formation of new fibrous preforms.
    Figure 9 illustrates an alternative embodiment of the fastening system of the extension according to the invention. In FIG. 9, an extension 320 comprises an attachment system 330 which differs from the fastening system 130 previously described in that it further comprises two flanges 331 and 332 of intermediate clamping elements 333, 334 and 335 present between the flanges 331 and 332. The flanges 331 and 332 and the intermediate clamping elements 333, 334 and 335 are connected together by a hinge 336 integral with the end 3211 of the band 321. The remainder of the extension 320 is identical to the extender 120 already described. The use of intermediate clamping elements in the fastening system 330 makes it possible to improve the maintenance of a fibrous texture and to limit the relative slippage between the strands or warp threads by trapping portions or folds that are independent of the texture. between a flange and an intermediate clamping element or between two intermediate clamping elements of the fastening system. For this purpose and as illustrated in FIG. 10, a fibrous texture 310, woven from four layers of chain threads C1, C2, C3 and C4 and weft threads T, has at its end intended to be maintained. by the fastening system 330 a portion 316 in which the four layers of chain son C1 to C4 are woven in a two-dimensional weave (2D) such as a fabric or a satin for example so as to form four independent layers or layers 311, 312, 313 and 314, that is to say not linked together by the weft son T. The rest of the fibrous texture 310 consists of a portion 315 which is woven in a three-dimensional weave or multilayer in which at least some of the weft threads T bind the warp son layers together.
    As illustrated in FIGS. 9 and 11, the pleats 311, 312, 313 and 314 are respectively placed between the flange 332 and the intermediate clamping element 335, between the intermediate clamping elements 335 and 334, between the intermediate clamping elements. 333 and 333 and between the intermediate clamping element 333 and the clamp 331. The intermediate clamping elements 333, 334 and 335 here comprise perforations allowing the passage of the pins 3310. In addition, the intermediate clamping elements 333, 334 and 335 preferably have a rough surface increasing the holding force of the folds.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    A backing tool (100) comprising a mandrel (110) having an outer surface (111) on which a fibrous texture (210) in the form of a strip is intended to be wound, characterized in that it further comprises an extension (120) having a flexible band (121) extending a predetermined length between a first end (1210) fixed to the mandrel (110) of the support tool (100) and a second free end (1211) comprising a fastening system (130) adapted to hold the end of the fibrous texture (210) in the form of a tape to be wound.
    [2" id="c-fr-0002]
    2. Tooling according to claim 1, characterized in that the flexible strip (121) of the extension (120) consists of a woven strip of yarn made of a material chosen from at least one of the following materials: poly (p-phenyleneterephthalamide) ) (PPD-T), intermediate-modulus carbon, poly (imino-1,3-phenyleneiminocarbonyl-1,3-phenylenecarbonyl) and glass.
    [3" id="c-fr-0003]
    3. Tooling according to claim 1 or 2, characterized in that the fastening system (130) comprises two flanges (131, 132) interconnected by a hinge (133) so as to form a jaw movable between a position d opening in which the flanges (131, 132) are spaced from each other and a closed position in which the flanges are clamped one opposite the other.
    [4" id="c-fr-0004]
    4. Tooling according to claim 3, characterized in that one (131) of the flanges (131,132) comprises pins (1310) on its face facing the other flange (132).
    [5" id="c-fr-0005]
    5. Tooling according to claim 3 or 4, characterized in that the fastening system (330) further comprises one or more intermediate clamping elements (333, 334, 335) present between the two flanges (331, 332).
    [6" id="c-fr-0006]
    6. Tooling according to claim 5, characterized in that each intermediate clamping element comprises rough surfaces.
    [7" id="c-fr-0007]
    A process for producing a reinforcing fibrous texture of a composite material revolution part comprising one-piece weaving by three-dimensional weaving or multilayer weaving between a plurality of layers of fibers having a fibrous texture (210) in the form of webbing and winding said texture onto a support tool (100) comprising a mandrel (110) having an outer surface (111) on which the fibrous texture (210) is wound, characterized in that the support tooling (100) further comprises an extender (120) having a flexible band (121) extending a predetermined length between a first end (1210) fixed to the mandrel of the support tool and a second free end (1211) comprising a fastening system (130) holding one end of the web-like fibrous texture as it winds on the support tool.
    [8" id="c-fr-0008]
    8. A method according to claim 7, characterized in that the fastening system (130) comprises two flanges (131, 132) interconnected by a hinge (133), the end of the fibrous texture being maintained between the two flanges (131, 132) when wound on the support tool (100).
    [9" id="c-fr-0009]
    9. The method of claim 8, characterized in that the fastening system (330) further comprises one or more intermediate clamping elements (333, 334, 335) present between the two flanges (331, 332) and in that that the end of the fibrous texture comprises a distal portion (316) in which at least a portion of the layers of yarns (C1, C2, C3, C4) are woven without bonding with the other layers of yarns of said texture, each layer nonwoven woven fabric (311; 312; 313; 314) being held between a flange (331; 332) and an intermediate clamping member (333; 333,335) or between two intermediate clamping members of the fastening system.
    [10" id="c-fr-0010]
    10. A method of producing a fibrous preform of revolution comprising the production of a fibrous texture (210) according to any one of claims 7 to 9, the method comprising the tensioning winding of said texture on the external surface of a mandrel (261) of a molding tool (260) so as to obtain a fibrous preform of revolution (280).
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    同族专利:
    公开号 | 公开日
    US10315367B2|2019-06-11|
    FR3040653B1|2018-05-04|
    US20170066203A1|2017-03-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE908004C|1941-12-06|1954-04-01|Hohenlimburger Walzwerke Ag|Device for dressing the outer ends of metal coils or rings|
    DE3612079A1|1985-04-17|1986-10-23|Fritz Gegauf AG Bernina-Nähmaschinenfabrik, Steckborn, Thurgau|Device for fastening the embroidery ground fabric to the shaft beam of an embroidering machine|
    FR2993815A1|2012-07-30|2014-01-31|Snecma|Method for manufacturing fibrous reinforcement preform of composite material part i.e. crankcase, of plane, involves activating electromagnet so as to maintain position of fibrous structure on support tool|
    WO2015098761A1|2013-12-25|2015-07-02|プリンテック株式会社|Winding core and takeup method|FR3070304A1|2017-08-30|2019-03-01|Safran Aircraft Engines|INSTALLATION, SHAPING METHOD AND METHOD FOR IMPREGNATING A FIBROUS PREFORM|US4804294A|1986-06-03|1989-02-14|Barthel Ted F|Method and means for improved erosion control|CN105442154B|2015-12-15|2017-05-10|机械科学研究总院先进制造技术研究中心|Knitting method of three-dimension precast body of gradient structure|
    CN109969872B|2019-04-25|2021-03-09|上海交通大学|Internally-sealed optical fiber superconducting tape take-up reel and working method thereof|
    CN111747207B|2020-06-22|2021-11-23|芜湖富田电子科技有限公司|Coiling mechanism is used in plastic tubing extrusion molding|
    法律状态:
    2016-09-02| PLFP| Fee payment|Year of fee payment: 2 |
    2017-03-10| PLSC| Search report ready|Effective date: 20170310 |
    2017-05-17| PLFP| Fee payment|Year of fee payment: 3 |
    2018-08-17| CD| Change of name or company name|Owner name: SAFRAN, FR Effective date: 20180717 Owner name: SAFRAN AIRCRAFT ENGINES, FR Effective date: 20180717 |
    2018-08-22| PLFP| Fee payment|Year of fee payment: 4 |
    2019-08-20| PLFP| Fee payment|Year of fee payment: 5 |
    2020-08-19| PLFP| Fee payment|Year of fee payment: 6 |
    2021-08-19| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1558254A|FR3040653B1|2015-09-07|2015-09-07|SUPPORT TOOLING FOR WINDING FIBROUS TEXTURE, METHOD FOR MANUFACTURING FIBROUS TEXTURE, AND METHOD FOR MANUFACTURING FIBROUS PREFORM OF REVOLUTION|FR1558254A| FR3040653B1|2015-09-07|2015-09-07|SUPPORT TOOLING FOR WINDING FIBROUS TEXTURE, METHOD FOR MANUFACTURING FIBROUS TEXTURE, AND METHOD FOR MANUFACTURING FIBROUS PREFORM OF REVOLUTION|
    US15/258,152| US10315367B2|2015-09-07|2016-09-07|Support tooling for winding a fiber texture, a method of fabricating a fiber texture, and a method of fabricating a fiber preform for a body of revolution|
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