EP2087157B1 - Système de tissage d'un angle continu - Google Patents

Système de tissage d'un angle continu Download PDF

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Publication number
EP2087157B1
EP2087157B1 EP07821834A EP07821834A EP2087157B1 EP 2087157 B1 EP2087157 B1 EP 2087157B1 EP 07821834 A EP07821834 A EP 07821834A EP 07821834 A EP07821834 A EP 07821834A EP 2087157 B1 EP2087157 B1 EP 2087157B1
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EP
European Patent Office
Prior art keywords
weaving
loom according
spool
hooks
threads
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07821834A
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German (de)
English (en)
French (fr)
Other versions
EP2087157A1 (fr
Inventor
Xavier Legrand
Georgi Tsarvarishki
Julien Charles
Philippe Blot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Operations SAS
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Airbus Operations SAS
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Filing date
Publication date
Application filed by Airbus Operations SAS filed Critical Airbus Operations SAS
Publication of EP2087157A1 publication Critical patent/EP2087157A1/fr
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Publication of EP2087157B1 publication Critical patent/EP2087157B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D25/00—Woven fabrics not otherwise provided for
    • D03D25/005—Three-dimensional woven fabrics
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D41/00—Looms not otherwise provided for, e.g. for weaving chenille yarn; Details peculiar to these looms
    • D03D41/004—Looms for three-dimensional fabrics
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/24—Mechanisms for inserting shuttle in shed
    • D03D49/46—Mechanisms for inserting shuttle in shed wherein the shuttle is pushed or pulled positively
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S139/00—Textiles: weaving
    • Y10S139/01—Bias fabric digest

Definitions

  • the invention relates to the field of weaving, in particular of technical textiles in which at least one thread of the weft of the fabric forms a continuous angle, for example in relief.
  • the invention relates to a system that allows the insertion of several plies and the weaving in parallel of these plies, preferably using the same weft yarn.
  • the various elements of the loom are optimized to reduce its size and facilitate the various weaving steps.
  • the system according to the invention is particularly suitable for a three-dimensional surface weaving making it possible to obtain structures extracted from hexahedrons, in particular trihedral angles, woven continuously between the various edges.
  • all the woven fabrics comprise an interlacing of yarns divided into two categories: the "warp threads” are threads parallel to the edges of the fabric, and they are crisscrossed, in a pattern called “armor”, with a perpendicular series of "Weft threads”.
  • the simplest armor consists of an alternation in which each weft thread passes successively above and below a warp, with a shift from one frame to another ("plain weave").
  • a loom for weaving a fabric in the weft of which at least one yarn forms an angle is known from JP 626 43 25 A .
  • the warp yarns 2 are firstly wound on the same support, the "beam” 3, parallel to each other and over a width that will correspond to the width of the fabric 1; a “creel” is used to facilitate this operation in the case of fragile materials, but has a significant footprint.
  • the weft thread 4 will be passed between the warp threads 2, each passage corresponding to a "pick”.
  • the web 2 'of warp threads 2 may be prepared (for example by gluing) in order to increase its mechanical strength, in particular to friction.
  • each pick is facilitated by making a "crowd" 5 in the web 2 ', that is to say by raising or lowering some warp threads 2 relative to the others, so that a space angular passage 5 is created.
  • the warp threads 2 are retracted into heddles 6, which will undergo the movement perpendicular to the ply 2 'resulting from the beam 3.
  • Various mechanisms (frame, Jacquard) allow to create crowds according to the required armor.
  • the insertion of the pick 4 can be done by various methods.
  • An old conventional method comprises projecting, across the sheet, a shuttle 7, a tool that holds a bobbin 8, the latter containing a winding of a certain length of weft yarn 4.
  • this passage generates friction . If gluing sometimes makes it possible to increase the mechanical strength, this solution can not be adopted for all textiles, and in particular, not for reinforcing threads for composite structures with high strength.
  • a corner of trunk classic 10 comprises for example three two-dimensional walls 12, 14, 16, substantially planar, forming a trirectangle trihedral angle (type "half-cube").
  • Three-dimensional weaving processes have certainly been developed in which the product resulting from the weaving operation comprises an intercrossing of yarns arranged along the three directions of space.
  • Aérotiss® processes make it possible to weave glass and carbon fibers with multilayer interlacing which can be used to achieve aircraft leading edge skins, among others.
  • the braiding can be used: it allows to make parts directly in hollow form on a suitable mandrel.
  • a textile reinforcement of the trunk corner reinforcement can however only be made on existing machines from a "flat" version of the walls and through a seam 10z between at least two faces 14, 16.
  • the invention proposes a device capable of producing structures comprising a plurality of orthogonal faces between them and connected in at least three edges in a continuous manner, for example of trihedral angles, without seam.
  • the invention relates to a loom for insertion of wire forming an angle within the weave.
  • the loom according to the invention thus comprises first and second means for retrieving wires to form two intersecting webs, first and second means for forming crowds in the two webs, first and second means for tamping the picks in the two layers, for example combs secured to one another.
  • At least one, at least two, of the at least two tucking means is open, consisting of hooks.
  • One of the two shedding systems preferably both, is also open, i.e. it includes open wire handling members.
  • the shifting of the wires to form the shed is effected by means of a rod secured to the handling elements, preferably the tying hooks, which pivots about an axis and allows a mobilization of the son when a pressure is exerted on it.
  • a system tilting between two support positions on the rod allows the formation of the crowd: in a rest position, an initialization axis presses all the rods to align them, and in an actuating position, selected thrust elements in the other direction press on some rods so as to shift some hooks relative to others.
  • the rocker is preferably made around the same pivot axis as the rods.
  • the pick is inserted continuously between the two layers, and the loom according to the invention comprises a coil which can contain a winding of weft of sufficient length.
  • the loom is provided with means for receiving the bobbin when it is inserted at the corner between the two plies, preferably a receptacle provided with temporary holding means which may furthermore comprise means for guiding the bobbin to ensure a frictionless insertion.
  • the pick is inserted in a manner directed by temporarily securing the coil with insertion lances defining a weaving direction in each sheet.
  • the holding receptacle of the coil is then advantageously mounted so as to rotate to orient its opening in the direction of each lance used.
  • the loom can be provided with means allowing the offset of a woven surface relative to the webs, for example a frame movable in a direction perpendicular to the frame of the craft.
  • the tying hooks are associated with spring-type tensioning means, individually and / or collectively.
  • the loom according to the invention allows to insert into the weft wire at an angle between two portions of the wire respectively parallel to the two edges of the fabric.
  • a weft yarn inserted in a weaving web must be able to be inserted in two directions, and therefore two weaving webs at the same time must be able to be formed.
  • the loom 20 therefore comprises, on two adjacent sides of its frame 22, preferably orthogonal to each other, two thread taking-in means, at least one of the two being open so as to form the corresponding sheet. at the same time as weaving: see figure 3 .
  • the first ply 24A can, as usual, be stretched between the first side 22A and the third opposite side 22C of the frame, to be woven by a weft thread.
  • the frame of the loom comprises on a second side 22B hooks 26B for passing a wire 28 around to form a secondary web 24B: during weaving of the primary web 24A, the primary weft son 28 are extended to bypass the hooks 26B, and thus form a second ply 24B forming a closed angle 30, for example 90 ° if the weaving is orthogonal, with the first ply 24A at the woven piece 32.
  • this angle 30 will be possible to weave this angle 30 continuously by a single weft thread; in particular, once the first face 32 is woven, the secondary weft thread 34, instead of being fixed on a hook, can be used to weave the formed secondary ply 24B, the initial weft threads 28 then working in warp yarns .
  • the primary ply 24A is put in place by means of the same hook ply formation system 26A: the opening of this system allows the continuity of the warp yarns forming the ply 24A also, particularly advantageous in the case of fiber weaving for reinforcing composite structures, for example carbon or aramid.
  • the hooks 26A, 26B are individually associated with a tensioning system 36A, 36B loop for working 28 son stretch; a regulation system 38 in collective tension son can further guarantee the tension of the fabric 32: the function "reserve son" of the beam or creel is replaced by a collective voltage regulator son 38 having a recoil X, Y sufficient to the dimensions of the final preform.
  • the initial tying of the warp son is done, manually for example, in a first series of open frames 22A, comprising attachment hooks 26A optionally on each side 22A, 22C.
  • the weaving of this sheet 24A allows the formation of the first face 32: similar to conventional two-dimensional weaving, the method comprises the insertion of weft thread 28 into the first series of threads 24A set up on the loom 20, which is working in chain (primary warp threads).
  • the loom 20 includes a first shedding system, which may be conventional or, preferably, will be the same as that of the second mat and described later.
  • a second ply 24B is formed; in the case where the armor of the first face 32 is orthogonal, this second ply 24B is in particular perpendicular to the first face 32.
  • the weft threads 28 used for the first face 32 pass through the ply 24A and then make a loop at their respective hook 26B, then cross the frames again in the other direction.
  • a plane fabric 32 is obtained thanks to the system of open frames, together with a tuck in a second frame system 22B with the son used in weft (or picks) 28, that is to say one side 32 is woven while retracting the weft threads 28 which will be used in a chain in a following phase to insert secondary weft threads 34.
  • the secondary ply 24B being intended to be woven, a shed must be able to be opened between the strands 28: the loom according to the invention comprises a second shedding formation system 40 traversing the ply 24B, for example parallel to the second edge 22B of the frame .
  • the crowd forming system 40 is preferably fully open to simplify the formation of the web 24B; it may also be smooth two separable parts, the first part being open during the tapping of the web and being closed by the second part once the web formed, to proceed as usual.
  • the opening of the crowd is done without any frame or Jacquard mechanism, for a footprint less than that imposed by this type of system: the selection of the son 28, and therefore their vertical movement, is done through a system of flip, preferably directly on the hooks 26B.
  • the crowd forming system of the primary sheet 24A also operates by tilting, directly on the tying hooks 26A: this is particularly suitable for a small footprint as encountered in weaving units associated with production units of composite structures.
  • the hooks 26 are each secured to one end of a handling rod 42; the other end 44 of the rod 42 is for example coupled to the tensioning system 36, 38.
  • the rods 42 are guided by a ramp 48, which can form the edge 22 of the frame of the loom 20.
  • a latch system 50 bears on one part or the other of the rod 42.
  • the latch system 50 comprises an initialization axis 52 which actuates all the rods 42 together to align them, thereby creating an initial position of the hooks 26, preferably in a low position which corresponds to the plane of the web 24 warp son.
  • the flip-flop system 50 furthermore comprises a device 54, which selects the hooks 26 'which must rise according to the armor to be produced, then raises them to form the shed 56 by pressing on the other part of the rod. actuation 42 corresponding.
  • the selector device 54 may thus comprise pushing elements 58 that can take two positions depending on their activation, for example retractable: during the formation of the crowd 56, the selector device 54 activates the elements 58 accordingly, they exert a pressure on their rod 42, to lift the hooks 26 '. Then, the selection is modified according to the armor to be produced, by mechanical or electronic selection of the pushing elements 58.
  • the initialization axis 52 and the thrust elements 58 are connected by means such that the actuation of the activated thrust elements 58 causes a withdrawal from the initialization axis 52.
  • this coupling also functions by flip-flop and comprises a rocker 50 pivoting about the same axis 46 as the handling rods 42.
  • the crowds 56 are formed by even number of warp threads 28, but this poses no problem for technical textiles, and in particular reinforcements of composite structures.
  • the system 40 would, however, be adaptable for an odd armor, for example by looping around two hooks 26 consecutive during the tucking. It would also be possible to couple the actuating rods 42 to other wire handling elements, for example a series of hooks placed around each wire 28 within the ply 24.
  • the weaving is done simultaneously on the two layers created 24A, 24B (primary warp son and secondary warp son), with a non-rectilinear insertion of weft thread 34.
  • the pick must include a sufficient length of thread; conventionally, the weft thread 34 is in the form of a winding around a spool 60.
  • Means are provided in the loom 20 to allow a deposit temporary of the coil 60 of weft thread 34 between the two plies 24A, 24B, in order to selectively actuate the insertion means in the first 24A or the second ply 24B.
  • the depositing means 62 comprise a cylindrical receptacle adapted to the size of the coil 60, that is to say a sleeve 62 in which the coil 60 can be placed temporarily; the sheath 62 is advantageously provided with suitable holding means, for example a clamp coupled to a tip.
  • the sheath 62 may also be provided with guiding means for preventing friction or shock between the coil 60 and the walls of the sheath 62 during insertion; for example, the spool 60 is provided with a pointed appendix (unitary or added) at the end entering the sheath 62, which is provided with an orifice of complementary shape, opening or not, allowing a progressive readjustment of the position of the coil 60 by guiding the appendix in the orifice.
  • the sheath 62 is placed in the frame 22, between the first and second sides 22A, 22B and the plies 24A, 24B.
  • the sleeve 62 is rotatably mounted so that its opening can face the two directions of insertion of the pick 34.
  • the insertion of the pick 34 is performed by means of a directional lance 64 in each sheet 24.
  • Each lance 64 then comprises means for coupling with each other. temporarily to the coil 60, and to put it in the sheath 62 when it succeeds, thus allowing the transfer of the coil 60 from one lance to the other (multiple insertions system of picks).
  • the first spool 64A carrying the coil 60 is introduced into the open shed, for example orthogonally to the web 24A.
  • the lance 64A deposits the spool 60 in the sleeve 62, then leaves the crowd empty to return to the initial position.
  • the crowd formation system then closes, a tamping comb is eventually used, forming the fabric; the sheath 62 rotates towards the second direction perpendicular to the other ply 24B and a vacuum lance 64B picks up the spool 60 to retrace the second crowd.
  • This transfer makes it possible to direct the thread and thus to weave at an angle.
  • a lowering of the woven surface 32 with respect to plies 24A, 24B makes it possible to place the pick 34 forming an angle 30 above this surface 32, and to form a three-dimensional part comprising a first wall 32 and two blanks of walls, that is to say a corner.
  • the device then makes it possible to weave a fold of trihedral angle shape directly according to the desired three-dimensional profile, for example according to the figure 2 , with continuity of the son between the faces 12, 14, 16 and at the edges 10z.
  • the loom 20 then comprises means 66 allowing this shift.
  • the weaving is performed on son stretched in a frame 22, which remains fixed, but which comprises a mobile shaping frame 66 which shifts the woven preform by resting on the first face 32 to provide training corner 30, the tension of the fabric and the "marking" of the edges.
  • the movable frame 66 preferably corresponds to the surface of the first woven face 32, but it could be limited to an area adjacent to the edges of this face, or even to the only edges along which the secondary weft thread 34 passes.
  • the frame 66 lowers the fabric as the weaving in the Z direction is advanced, to obtain an optimized placement of the yarns 34 working in the Z direction during weaving.
  • the secondary weft yarns 34 are thus non-rectilinearly inserted along the directions along X and then along Y, allowing fabrication of the orthogonal faces; the reserves of X and Y son combined with collective voltage regulation systems provide the material for the constitution of these faces.
  • each secondary pick 34 is unitary for the different faces, so as to proceed once the entire angle is achieved.
  • the parallel orientation of the weft threads 34 with respect to the first face 32 is optimized.
  • the device is adapted to the realization of trunk corners according to the figure 2 , in which the dimensions of the part 10 are of the order of 400 mm ⁇ 220 mm ⁇ 200 mm, or even 800 ⁇ 220 ⁇ 200 mm 3 .
  • the carbon wire used advantageously comprises between 6000 and 24000 filaments, preferably 12000.
  • the ideal weight per unit area of each fold is 200 g / m 2 to 1200 g / m 2 , preferably 600 g / m 2 .
  • a trihedral angle 70 thus produced allows the formation of a trunk corner 10 after impregnation of a resin.
  • the volume ratio of the fibers within the total volume of the finished part is 55 to 60%.
  • the preform may preferably be superimposed on other preforms of the same nature, advantageously with an angulation between their son, so as to optimize the resistance of the final part 10 vis-à-vis the directions of mechanical stresses in the composite part.
  • the loom according to the invention is therefore particularly suitable for weaving reinforcements of composite structures, in view of optimizations allowing a smaller space while allowing the weaving of son forming angles, possibly in three dimensions.
  • each of the elements making up the loom according to the invention can be used independently of one another.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)
  • Looms (AREA)
  • Soil Working Implements (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
EP07821834A 2006-10-27 2007-10-25 Système de tissage d'un angle continu Not-in-force EP2087157B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0654583A FR2907803B1 (fr) 2006-10-27 2006-10-27 Systeme de tissage d'un angle continu
PCT/EP2007/061471 WO2008049883A1 (fr) 2006-10-27 2007-10-25 Système de tissage d'un angle continu

Publications (2)

Publication Number Publication Date
EP2087157A1 EP2087157A1 (fr) 2009-08-12
EP2087157B1 true EP2087157B1 (fr) 2010-03-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07821834A Not-in-force EP2087157B1 (fr) 2006-10-27 2007-10-25 Système de tissage d'un angle continu

Country Status (11)

Country Link
US (1) US8001998B2 (ru)
EP (1) EP2087157B1 (ru)
JP (1) JP5129256B2 (ru)
CN (1) CN101529002B (ru)
AT (1) ATE461302T1 (ru)
BR (1) BRPI0718417A2 (ru)
CA (1) CA2667262C (ru)
DE (1) DE602007005400D1 (ru)
FR (1) FR2907803B1 (ru)
RU (1) RU2418893C2 (ru)
WO (1) WO2008049883A1 (ru)

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Publication number Publication date
ATE461302T1 (de) 2010-04-15
WO2008049883A1 (fr) 2008-05-02
JP5129256B2 (ja) 2013-01-30
FR2907803A1 (fr) 2008-05-02
CN101529002A (zh) 2009-09-09
BRPI0718417A2 (pt) 2014-03-11
DE602007005400D1 (de) 2010-04-29
RU2418893C2 (ru) 2011-05-20
CA2667262A1 (en) 2008-05-02
FR2907803B1 (fr) 2009-01-23
US20100319801A1 (en) 2010-12-23
RU2009120108A (ru) 2010-12-10
CN101529002B (zh) 2011-05-18
US8001998B2 (en) 2011-08-23
CA2667262C (en) 2014-09-02
JP2010507733A (ja) 2010-03-11
EP2087157A1 (fr) 2009-08-12

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