• 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 a holding device (1; 11; 21; 31) intended to be present on the surface (S ') of a first part (25) of composite material in order to allow the maintenance of a second part ( 26) to the first piece (25), the holding device (1; 11; 21; 31) comprising: - a body (2; 2 ') of composite material comprising a fibrous structure and a matrix present in the porosity of the fibrous structure, and - a holding member (3; 30) having a base (4) and holding tabs (5a; 5b; 35a; 35b) extending from the base (4) on each side of the the holding tabs (5a; 5b; 35a; 35b) being intended to define a holding zone (Z) of the second piece (26) to the first piece (25), the base (4) of the holding being present in the body (2; 2 ') and the holding tabs (5a; 5b; 35a; 35b) protruding through a surface (S) of the body (2; 2').
    公开号:FR3027974A1
    申请号:FR1460671
    申请日:2014-11-05
    公开日:2016-05-06
    发明作者:Damien Lamouche；Adrien Paixao；Helene Elise Cecile Quillent；Kevin Coue
    申请人:SNECMA SAS；
    IPC主号:
    专利说明:

    [0001] BACKGROUND OF THE INVENTION The invention relates to devices for ensuring the maintenance of parts between them. It is possible to maintain parts between them to equip one of the parts with a holding member defining a holding zone in which the other part is intended to be housed. The holding member can be directly attached by gluing to the workpiece. However, the adhesion of a holding member directly adhered to the surface of a composite material part may not be entirely satisfactory and a take-off of the holding member may occur.
    [0002] There is therefore a need to improve the adhesion of holding members to composite material parts, including aircraft engine casings of composite material. OBJECT AND SUMMARY OF THE INVENTION For this purpose, the invention proposes, according to a first aspect, a holding device intended to be present on the surface of a first piece of composite material in order to allow the maintenance of a second piece. in the first piece, the holding device comprising: a body of composite material comprising a fibrous structure and a matrix present in the porosity of the fibrous structure, and a holding member comprising a base and holding tabs extending from the base on each side thereof, the holding tabs being intended to define a holding zone of the second piece to the first piece, the base of the holding device being present in the body and the holding tabs protruding through a body surface. The invention therefore consists in using a holding device in which the base of the holding member is wrapped by a body of composite material. The body may for example be an organic matrix composite material (CMO) or a ceramic matrix composite material (CMC). In the case where the body is made of organic matrix composite material, said body may for example have a matrix of thermoplastic material obtained by molding, the fibrous structure constituting the reinforcement of this matrix. The body is intended to ensure the attachment of the holding member to the first piece. The invention advantageously makes it possible to obtain a better adhesion of the holding member to the first piece with respect to the case where the holding member is directly adhered to this first piece, because of the fixing of the holding member. to the first piece through the body of composite material. In one exemplary embodiment, the base of the holding member may be draped between at least one first densified fibrous fold and at least one second densified fibrous fold, the second fibrous fold having openings through which the maintenance. In particular, at least one third perforated densified fibrous ply may be present between the first fibrous ply and the second fibrous ply, the base of the retaining member being housed in the opening of the third fibrous ply.
    [0003] Such a configuration advantageously makes it possible to limit or even eliminate the extra thickness in the holding device related to the thickness of the base of the holding member. Alternatively, the fibrous structure may be a fibrous structure obtained by three-dimensional weaving.
    [0004] In an exemplary embodiment, the holding tabs can be configured to allow clipping of the second piece to the first piece. Alternatively, the holding tabs may be configured to define a clamp capable of clamping the second piece to the first piece.
    [0005] In an exemplary embodiment, the device may further comprise one or more centering pins present on the surface of the device opposite to that traversed by the holding tabs. In an exemplary embodiment, the holding member has a general shape in the form of a lyre.
    [0006] The present invention also relates to a composite material part having on its surface a holding device as defined above. The part can constitute an aeronautical engine casing.
    [0007] The holding device can be attached to the workpiece by a layer of adhesive. The present invention also relates to an assembly comprising a first part as defined above and a second part held in the first part by means of the holding device.
    [0008] The second piece may, for example, be a fire hose, cable or quilt. The present invention also relates to an aircraft equipped with an assembly as defined above. The present invention also relates to a method of manufacturing a holding device as defined above, comprising the following steps: a) applying a pressure on at least one fibrous structure present in a molding cavity, the fibrous structure comprising the holding member, and at least one impregnated first fibrous fold and at least one second impregnated fibrous fold, the base of the holding member being present between the first and second impregnated fibrous folds, the second impregnated fibrous fold; having perforations traversed by the holding tabs, a central portion of the second impregnated fibrous ply being opposite the base of the holding member and the lateral portions of the second impregnated fibrous ply being situated on either side of the part central, the pressure applied during step a) being exerted on the central portion and on the lateral portions of the second impregnated fibrous ply, b heat treatment to form a matrix in the porosity of the first and second fibrous plies and thereby obtain the holding device, the pressure applied during step a) being maintained during step b).
    [0009] Such a method is advantageous because it makes it possible to obtain a homogeneous plating of the pleats on the lateral and central parts of the holding device while limiting the phenomena of porosity and dry zones. This advantageously allows to obtain a good flatness of the draping of the holding member after heat treatment. In an exemplary embodiment, the fibrous structure may be present between a support and a lower block through which the holding lugs extend, the lower block applying the pressure on the lateral parts of the second fibrous fold impregnated during the step at). In an exemplary embodiment, the lower block can be formed by assembling two half-blocks, the two half-blocks being separable from one another on either side of the holding lugs during demolding of the device. maintenance obtained.
    [0010] In an exemplary embodiment, the molding cavity can be evacuated at least during step b). In an exemplary embodiment, the fibrous structure may, in addition, comprise at least one third impregnated perforated fibrous ply present between the first fibrous ply and the second fibrous ply, the base of the retaining member being housed in the aperture of the third fibrous fold. In an exemplary embodiment, the fibrous structure may be present on a support, the face of the support facing the fibrous structure having a plurality of blind holes. Such an embodiment is advantageous because it makes it possible to form, for example, centering pins on one side of the creep holding device of the composition impregnating the folds in the blind holes during the manufacture of the holding device. In an exemplary embodiment, a plurality of fibrous structures can be processed simultaneously.
    [0011] BRIEF DESCRIPTION OF THE DRAWINGS Other characteristics and advantages of the invention will emerge from the following description of particular embodiments of the invention, given by way of non-limiting examples, with reference to the appended drawings, in which: FIG. 1 schematically represents a first example of a holding device according to the invention, - Figure 2 schematically shows a part according to the invention having on its surface the holding device according to Figure 1, - Figures 3 to 6. schematically represent variants of holding device according to the invention, - Figures 7 to 9 schematically illustrate the implementation of methods of manufacturing a holding device according to the invention, and - Figures 10 and 11 represent details of elements that can be used during the manufacture of the holding device according to the invention. DETAILED DESCRIPTION OF EMBODIMENTS FIG. 1 shows a first example of a holding device 1 according to the invention. The holding device 1 of Figure 1 comprises a body 2 of composite material having a fibrous structure in the porosity of which a matrix is present. The body may for example be an organic matrix composite material or a ceramic matrix composite material. The holding device 1 further comprises a holding member 3 comprising a base 4 and holding tabs 5a and 5b extending from the base 4 on each side thereof. The holding member 3 may be made of a metallic material. In the example illustrated in FIG. 1, the base 4 of the holding member 3 is present between the first densified fibrous plies 10a and the second densified fibrous plies 10b, the second fibrous plies 10b having openings through which extend the holding tabs 5a and 5b. The holding lugs 5a and 5b each form, when moving towards the base 4, a bent portion 6a and 6b and project through the surface S of the body 2. The holding device 1 is intended to be present on the surface S 'of a first piece 25 of composite material. Such a configuration is shown in FIG. 2, in which the holding device 1 is fixed to the surface S 'of the first part 25 by means of a layer of adhesive 20. Such a configuration is however not mandatory as it will be explained below. The first part may, for example, be an aeronautical engine casing, for example an organic matrix composite material or a ceramic matrix composite material. The holding tabs 5a and 5b of the device 1 define a holding zone Z in which a second part 26 is housed in order to be held at the first part 25.
    [0012] In the example illustrated in Figure 1, the holding device 1 has a general shape in the form of a lyre. In other words, when moving from the ends 7a and 7b of the holding tabs 5a and 5b towards the surface S of the body 2, the distance d separating the tabs 5a and 5b is first decreasing, then increasing, then decreasing. As illustrated in FIG. 1, the majority (more than 50%) of the length I of the holding tabs 5a and 5b protrude from the body 2. The holding tabs 5a and 5b in this configuration are configured to allow clipping of the second part 26. To do this, the second part 26 is inserted between the tabs 5a and 5b at the ends 7a and 7b in the direction of the surface S until clipping into the zone Z. In the illustrated example the zone Z is present between two zones Z1 and Z2 in which the distance d between the tabs 5a and 5b is minimal. This clipping keeps the second piece to the first piece with the holding device. FIG. 3 shows a variant of the holding device 11 according to the invention. In the same way as in FIG. 1, the base 4 of the holding member 3 is present between densified first fibrous folds 10a and second densified fibrous folds 10b, the second fibrous folds having openings through which extend the holding tabs 5a and 5b. In the example of FIG. 3, at least one third densified fibrous fold 10c is present between the second fibrous folds 10b and the first fibrous folds 10a. The third fibrous fold 10c has a through opening in which the base 4 of the holding member is housed. The thickness el of the base 4 of the holding member may be substantially equal to the thickness e2 of the third fibrous ply 10c. In this configuration, the holding device 11 obtained does not have an excess thickness related to the thickness of the base 4 of the holding member 3. Alternatively, the thickness el of the base 4 is smaller or greater than the thickness e2.
    [0013] FIG. 4 shows another example of a holding device 21 according to the invention in which the body 2 'comprises a fibrous structure obtained by three-dimensional weaving, for example by multilayer weaving. In order to obtain such a structure, threads may be directly woven around the holding member 3. By "three-dimensional weaving" or "3D weaving" is meant here a weaving mode by which at least some of the warp layers bind frame layers on several weft layers. By "multilayer weave" is meant here a 3D weave with several weft layers whose basic armor of each layer is equivalent to a conventional 2D fabric weave, such as a linen, satin or twill type armor, but with some points of the weave that bind the weft layers between them. Another example of a holding device 31 is shown in FIG. 5. In this example, centering pins P are present on the surface S "of the device 31 opposite that crossed by the legs 5a and 5b. P centering pins makes it easy to ensure a good positioning of the holding device 31 on the first part as well as to avoid the rotation of the holding device 31 when it is positioned on the first part. P may be obtained by molding during the manufacture of the holding device As a variant, these pins P may consist of insert elements present in the folds In the variant illustrated in FIG. 6, the device 41 has a holding member 30 having holding tabs 35a and 35b configured to define a clamp to clamp the second piece to the first piece. For example, the tabs 35a and 35b can be of the Serflex type. We will now describe Figure 7 which relates to the manufacture of a holding device 1 as illustrated in Figures 1 and 2. In a first step, the holding member 3 is placed on first fibrous folds 12a pre-impregnated with a resin. Second fibrous plies 12b are then superimposed pre-impregnated with a resin. The second fibrous plies 12b have, as illustrated, openings 13a and 13b through which the holding tabs will extend after positioning the second fibrous folds 12b on the first fibrous folds 12a. FIG. 7 illustrates an example in which a plurality of first plies 12a and a plurality of second plies 12b are used. It is not beyond the scope of the invention when a single first fold 12a and / or a single second fold 12b is used. Once the second plies 12b positioned on the first folds 12a, a pressure can be applied on the first and second plies 12a and 12b. A heat treatment can then be performed while this pressure is maintained in order to polymerize the resin and form a matrix in the porosity of the first 12a and second plies 12b and to secure these folds 12a and 12b therebetween. At the end of such a heat treatment, the holding device 1 as illustrated in FIGS. 1 and 2 is obtained. An adhesive may or may not be used so as to improve the fixing of the holding member to the first and second members. folds. The example illustrated in Figure 7 illustrates the case where the folds 12a and 12b are already impregnated with resin before the draping of the holding member. Alternatively, the retaining member may first be placed on first dry fibrous plies and then second dry fibrous plies may be placed on the first dry fibrous plies. The resin can then be applied to the first and second plies using an applicator, for example by roller. The following process may be as described above to obtain the holding device (application of a pressure and thermal treatment of polymerization of the resin while this pressure is maintained). Furthermore, the example illustrated in Figure 7 illustrates the use of fibrous folds 12a and 12b of rectangular shape in top view. It is not beyond the scope of the invention when these folds have another shape, for example square or round. Those skilled in the art will be able to choose the number, the shape and the chemical nature of the folds used according to the intended application.
    [0014] It has been described in connection with Figure 2 that the holding device 1 could be fixed by gluing to the surface of the first part 25. This is however not mandatory. Indeed, when impregnated first fibrous plies are used, it is possible to place them on a blank of the first part comprising a fibrous preform in the porosity of which a resin is present and to carry out the heat treatment. The heat treatment carried out will make it possible to polymerize the resin present in the first fibrous folds and in the blank which will make it possible to secure the holding device to the first piece. In this case, it is therefore possible not to use adhesive to ensure the attachment of the holding device to the first part.
    [0015] FIG. 8 illustrates an example of a method of manufacturing a holding device according to the invention implementing a mold defining a molding cavity in which a fibrous structure 50 is present. In this fibrous structure 50, the base 4 of the holding member is draped between a first fibrous fold 12a and a second fibrous fold 12b. As illustrated, a third fibrous ply 12c is present between the first and second fibrous plies 12a and 12b. The third fibrous ply has, as explained above, a through aperture 14 in which the base 4 of the holding member is present. This structure 50 rests on a rigid support 40. In this process, pressure is applied to the fibrous structure 50 at a central portion C of the second fold 12b opposite the base 4 of the maintaining and at the side portions L of the second fold 12b located on either side of the central portion C. Concretely, the central block 43 will apply a pressure on the central portion C and the lower block 45 will apply a pressure on the lateral parts L. The central block 43 allows plating of the pleats in the center of the holding member. The central block 43 may be made of a metallic material possibly coated with a non-stick coating at least in the areas intended to come into contact with the holding member. Alternatively, the central block 43 may be polytetrafluoroethylene (TeflonC)). The lower block 45 has, meanwhile, a machining (shoulder) to come to receive the holding member. The lower block 45 may be made of metallic material, optionally coated with a non-stick coating. Lateral walls 42a and 42b and upper 44 of the mold are present in order to close the mold and to seal against the external environment. While the pressure is maintained, heat treatment will be carried out in order to polymerize the resin impregnating the plies 12a, 12b and 12c and thus obtain the holding device. It is possible to evacuate the mold (both in the upper part and in the lower part) during the polymerization.
    [0016] FIG. 9 is a perspective view of a mold useful for manufacturing the holding device according to the invention and having a cross-section as illustrated in FIG. 8. As illustrated, a plurality of fibrous structures 50 are present in the molding cavity and are processed simultaneously. There is shown a mold for the treatment of four fibrous structures 50, naturally it is not beyond the scope of the invention if a different number of fibrous structures is present in the mold. FIG. 10 illustrates a detail of the lower block 45. In this embodiment, the lower block 45 is formed by assembling two half-blocks 45a and 45b, the two half-blocks 45a and 45b being separable from one of the another on either side of the X axis. In this embodiment, the half-blocks 45a and 45b are separable on either side of the holding tabs during demolding of the holding device obtained. Such an embodiment is advantageous because it facilitates the insertion of the various elements into the mold and the demolding of the holding device obtained. Once the two half-blocks are in place, the latter are clamped. Of course, it is alternatively possible to implement a lower block consisting of a single piece. Figure 11 illustrates a detail of the support 40 on which the fibrous structure rests. The face F of the support 40 intended to be placed facing the fibrous structure is provided with blind holes 46 for the realization of centering pins by molding the resin impregnating the plies. During the manufacturing process of the holding device, the resin flows into the blind holes 46 in order to form, after polymerization, the centering pins. The face F further comprises separating walls 47 intended to delimit different areas of placement of the fibrous structures. Alternatively, a support whose face intended to be present facing the fibrous structure has no blind hole or partition wall.
    [0017] The expression "understood between ... and ..." or "from ... to" must be understood as including boundaries.
    权利要求:
    Claims (16)
    [0001]
    REVENDICATIONS1. Holding device (1; 11; 21; 31) intended to be present on the surface (S ') of a first piece (25) of composite material in order to allow a second piece (26) to be held at the first piece (25), the holding device (1; 11; 21; 31) comprising: - a body (2; 2 ') of composite material comprising a fibrous structure and a matrix present in the porosity of the fibrous structure, and - a holding member (3; 30) having a base (4) and holding tabs (5a; 5b; 35a; 35b) extending from the base (4) on each side thereof; (5a; 5b; 35a; 35b) being intended to define a holding zone (Z) of the second piece (26) to the first piece (25), the base (4) of the holding device being present in the body (2; 2 ') and the holding tabs (5a; 5b; 35a; 35b) protruding through a surface (S) of the body (2; 2').
    [0002]
    2. Device (1; 11; 31; 41) according to claim 1, characterized in that the base (4) of the holding member is draped between at least one first densified fibrous ply (10a) and at least one second densified fibrous ply (10b), the second fibrous ply (10b) having openings through which the holding tabs (5a, 5b, 35a, 35b) extend.
    [0003]
    3. Device (11) according to claim 2, characterized in that at least one third perforated densified fibrous ply (10c) is present between the first fibrous ply (10a) and the second fibrous ply (10b), the base (4). ) of the holding member (3) being housed in the ajour of the third fibrous fold (10c).
    [0004]
    4. Device (21) according to claim 1, characterized in that the fibrous structure is a fibrous structure obtained by three-dimensional weaving. 302 79 74 12
    [0005]
    5. Device (1; 11; 21; 31) according to any one of claims 1 to 4, characterized in that the holding tabs (5a; 5b) are configured to allow clipping of the second piece (26) to the first piece (25).
    [0006]
    6. Device (41) according to any one of claims 1 to 4, characterized in that the holding tabs (35a, 35b) are configured to define a clamp capable of clamping the second piece to the first piece .
    [0007]
    7. Device (31) according to any one of claims 1 to 6, characterized in that it further comprises one or more centering pins (P) present on the surface (S ") of the device (31). opposite to that traversed by the holding tabs (Sa; 5b).
    [0008]
    8. Device (1; 11; 21; 31) according to any one of claims 1 to 7, characterized in that the holding member (3) has a general shape in the form of a lyre. 20
    [0009]
    9. Part (25) of composite material having on its surface (S ') a holding device according to any one of claims 1 to 8.
    [0010]
    10. Part (25) according to claim 9, characterized in that it 25 constitutes an aeronautical engine casing.
    [0011]
    11.Ensennble comprising a first part (25) according to any one of claims 9 and 10 and a second part (26) held at the first part by means of the holding device. 30
    [0012]
    12.Aironef equipped with an assembly according to claim 11.
    [0013]
    13. A method of manufacturing a holding device (1; 11; 31; 41) according to any one of claims 2, 3 and 5 to 8, comprising the following steps: 5 10 15a) applying a pressure on at least one fibrous structure (50) present in a mold cavity, the fibrous structure comprising: - the holding member (3; 30), and - at least one first impregnated fibrous fold (12a) and at least one second impregnated fibrous ply (12b), the base (4) of the retaining member being present between the first and second impregnated fibrous plies, the second impregnated fibrous ply (12b) having openings (13a, 13b) traversed by the flaps holding (5a; 5b; 35a; 35b), a central portion (C) of the impregnated second fibrous ply (12b) facing the base (4) of the holding member (3; 30) and the lateral portions (4); L) of the second fibrous impregnated fold (12b) being located on either side of the central portion (C), the pressure applied to the s of step a) being exerted on the central portion (C) and on the side portions (L) of the second impregnated fibrous ply (12b), b) heat treatment to form a matrix in the porosity of the first and second plies fibrous and thus obtain the holding device, the pressure applied during step a) being maintained during step b).
    [0014]
    14. The method of claim 13, characterized in that the fibrous structure (50) is present between a support (40) and a lower block (45) through which extend the holding lugs (5a, 5b, 35a; 35b), the lower block (45) applying pressure to the side portions (L) of the second impregnated fibrous fold (12b) in step a).
    [0015]
    15.Procédé according to claim 14, characterized in that the lower block (45) is formed by assembling two half-blocks (45a; 45b), the two half-blocks (45a; 45b) being separable one of the on either side of the retaining lugs (5a; 5b; 35a; 35b) during demolding of the holding device obtained.
    [0016]
    16.Procédé according to any one of claims 13 to 15, characterized in that the molding cavity is evacuated at least during step b). 10 15 20 25 30 35
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    同族专利:
    公开号 | 公开日
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    法律状态:
    2015-11-16| PLFP| Fee payment|Year of fee payment: 2 |
    2016-05-06| PLSC| Publication of the preliminary search report|Effective date: 20160506 |
    2016-11-09| PLFP| Fee payment|Year of fee payment: 3 |
    2017-10-20| PLFP| Fee payment|Year of fee payment: 4 |
    2018-06-29| CD| Change of name or company name|Owner name: SAFRAN AIRCRAFT ENGINES, FR Effective date: 20170719 |
    2018-10-24| PLFP| Fee payment|Year of fee payment: 5 |
    2019-10-22| PLFP| Fee payment|Year of fee payment: 6 |
    2020-10-21| PLFP| Fee payment|Year of fee payment: 7 |
    2021-10-20| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1460671A|FR3027974B1|2014-11-05|2014-11-05|HOLDING DEVICE FOR PRESENTATION ON THE SURFACE OF A COMPOSITE MATERIAL PART|FR1460671A| FR3027974B1|2014-11-05|2014-11-05|HOLDING DEVICE FOR PRESENTATION ON THE SURFACE OF A COMPOSITE MATERIAL PART|
    CN201580060265.3A| CN107076188B|2014-11-05|2015-10-30|The fixer device on surface for being present in the part made of composite material|
    US15/524,516| US10323669B2|2014-11-05|2015-10-30|Holder device for being present at the surface of a part made of composite material|
    PCT/FR2015/052930| WO2016071610A1|2014-11-05|2015-10-30|Holding device intended to be present at the surface of a part made of composite material|
    EP15798526.8A| EP3215748B1|2014-11-05|2015-10-30|Holding device intended to be present at the surface of a part made of composite material|
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