• 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 method of shaping a fan casing (1) comprising an inner surface, the method comprising the following steps: - placing the casing (1) around a surface of revolution of a drum of a tool (100) conformation, - interposition of at least one bladder (101, 102, 103) inflatable under the action of a fluid under pressure between a portion of the inner surface of the housing (1) and the drum, the bladder extending over all or part of the revolution surface of the drum, - placing in an oven the assembly comprising the casing (1), the tool (100) and the said at least one bladder (101, 102, 103) to a predetermined temperature, - during the setting in an oven, application of isostatic pressure through said at least one bladder so as to impart a cylindrical profile to the portion of the inner surface of the casing (1) facing said at least one bladder.
    公开号:FR3060438A1
    申请号:FR1662542
    申请日:2016-12-15
    公开日:2018-06-22
    发明作者:Richard MATHON；Michel Serge Magnaudeix Dominique
    申请人:Safran Aircraft Engines SAS；
    IPC主号:
    专利说明:

    ® FRENCH REPUBLIC
    NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY © Publication number: 3,060,438 (to be used only for reproduction orders)
    ©) National registration number: 16 62542
    COURBEVOIE © Int Cl 8 : B 29 C 53/80 (2017.01), B 29 C 70/06, F 01 D 21/04
    A1 PATENT APPLICATION
    ©) Date of filing: 15.12.16. © Applicant (s): SAFRAN AIRCRAFT ENGINES ©) Priority: Simplified joint stock company - FR. @ Inventor (s): MATHON RICHARD and MAGNAUDEIX DOMINIQUE, MICHEL, SERGE. (43) Date of public availability of the request: 22.06.18 Bulletin 18/25. ©) List of documents cited in the report preliminary research: Refer to end of present booklet (© References to other national documents ® Holder (s): SAFRAN AIRCRAFT ENGINES Company related: by simplified actions. ©) Extension request (s): ® Agent (s): CABINET BEAU DE LOMENIE.
    Pty PROCESS AND TOOLS FOR SHAPING A BLOWER HOUSING.
    FR 3 060 438 - A1
    Method for forming a fan casing (1) comprising an internal surface, the method comprising the following steps:
    - positioning of the casing (1) around a surface of revolution of a drum of a shaping tool (100),
    - interposition of at least one bladder (101, 102, 103) inflatable under the action of a pressurized fluid between a part of the internal surface of the casing (1) and the drum, the bladder extending over all or part of the surface of revolution of the drum,
    - placing the assembly comprising the housing (1), the tool (100) and said at least one bladder (101, 102, 103) at a predetermined temperature,
    - During the placing in the oven, application of an isostatic pressure through said at least one bladder so as to impart a cylindrical profile to the part of the internal surface of the casing (1) facing said at least one bladder.
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    Invention background
    The invention relates to a process for shaping a fan casing and a shaping tool for this casing.
    Among the existing injection molding processes, the resin transfer molding process known as "RTM" (English acronym for "Resin Transfer Moiding") is known, in which a mold comprises two half-shells which, placed one on the other, confine a molding cavity. The fibrous preform is inserted into the cavity between the two half-shells and is then injected with resin. The polymerization of the resin is carried out by keeping the two half-shells closed. Depending on the production rate desired, the polymerization is carried out at room temperature or by heating. Such a process can be used for the production of parts for revolutions, by way of example for the manufacture of casings for blowers for gas turbines of aeronautical engines.
    The use of such a method is particularly advantageous because it makes it possible to produce parts having a lower overall mass than these same parts when they are made of metallic material, while having a mechanical resistance at least equivalent if not greater.
    Commonly, it can be observed at the mold outlet, that is to say during the extraction of the manufactured part, a deformation with respect to the theoretical nominal geometry. One can thus, by way of example, observe for a part of revolution, such as a fan casing, a defect with respect to a theoretical circular geometry, appearing in the form of the appearance of an ovalization of this part during its extraction from the mold.
    Such defects can be explained in particular by the fact that residual stresses apply to the part during its manufacture in the mold (eg: polymerization gradient, winding tension for a part made of composite material), and are released during of the extraction of the part from the mold, then leading to a deformation of the extracted part.
    To overcome this drawback, it is known to use at least one mold comprising a molding cavity whose geometry does not correspond to the nominal geometry of the part to be produced but to a geometry for which the deformation has been taken into account, so as to finally obtain during the extraction of this part from the mold, the nominal geometry of the part. Advantageously, such a method can thus make it possible to counter the ovalization of a part of revolution at the outlet from the mold.
    However, during the manufacture of a fan casing, the observed ovalization thereof does not only occur during its extraction from the mold. The manufacture of the casing in fact subsequently involves various successive operations, such as machining operations (eg trimming, drilling) and bonding operations (eg acoustic panels, fire protection panels). The machining operations lead to the release of physical constraints which can promote deformations of the casing. Bonding operations are commonly performed in ovens. These bonding operations involve steps of temperature rise and pressurization of the casing, followed by a step of cooling the latter. All of these steps also lead to the appearance of stresses acting on the ovalization of the casing. Various ovalizations of the casing can therefore appear throughout its manufacturing process and then tend to accumulate.
    The existing state of the art then appears to be insufficient to counter the ovalization of the fan casing during its manufacture, given that the appearance of this ovalization does not only occur during the extraction of the casing from its cavity. molding but also during machining or bonding steps.
    Subject and summary of the invention
    The object of the present invention is to remedy the aforementioned drawbacks.
    To this end, the invention proposes a method for shaping a fan casing comprising an internal surface, the method comprising the following steps:
    placing the internal surface of the fan casing around a surface of revolution of a drum of shaping tools,
    interposition of at least one inflatable bladder under the action of a pressurized fluid between a part of the internal surface of the casing and the tool drum, the bladder extending over all or part of the surface of revolution of the drum,
    - placing the assembly comprising the housing, the tool and said at least one bladder at an oven temperature at a predetermined temperature,
    - During the placing in the oven, application of an isostatic pressure through said at least one bladder so as to give a cylindrical profile to the part of the internal surface of the casing facing said at least one bladder.
    This method is particularly advantageous in that it can be implemented at any time in the life cycle of the fan casing either at the time of its manufacture or at the time of a subsequent repair. By way of example, it makes it possible to correct the ovalization of one or more predetermined zones of the fan casing during a step of manufacturing or repairing it, for example during a step of bonding an external element. requiring the oven to be placed in an oven. The time to manufacture or repair the fan casing is therefore reduced. Furthermore, the parts produced have geometries closer to the theoretical geometries compared to the parts currently produced. Such a process is also more robust because it ensures better repeatability of the quality of the parts.
    According to another aspect, in this process the casing comprises a barrel extending axially between two flanges, the barrel comprising an intermediate zone located at a distance from the flanges and two lateral zones on either side of the intermediate zone, the flanges s extending radially from the lateral zones, the intermediate zone forming a retention zone of the casing, the isostatic pressure being applied in a bladder disposed opposite an internal surface of the retention zone.
    According to another aspect, in this process the isostatic pressure is applied in at least one bladder disposed opposite an internal surface of one of the lateral zones of the barrel.
    According to another aspect, in this process the step of placing in an oven corresponds to a step of bonding an external element to the fan casing.
    According to another aspect, in this method the oven drying step is implemented during a repair of the fan casing.
    The invention also provides a tool for shaping a fan casing comprising an internal surface, this tool comprising a drum having a surface of revolution and at least one bladder inflatable under the action of a pressurized fluid extending over all or part of the surface of revolution of the drum, the bladder being arranged so as to face a part of the internal surface of the fan casing when the latter is placed around the surface of revolution, said at at least one bladder being connected to means for adjusting a pressurized fluid configured to control, using the pressurized fluid, the inflation of the bladder so as to give the part of the internal surface of the fan casing a profile cylindrical when it is placed around the surface of revolution.
    According to another aspect, for this tool, the casing comprises a barrel extending axially between two flanges, the barrel comprising an intermediate zone located at a distance from the flanges and two lateral zones on either side of the intermediate zone, the flanges s extending radially from the lateral zones, the intermediate zone forming a housing retention zone, and said at least one bladder is arranged so as to face an internal surface of the retention zone when the housing is put in place around the surface of revolution.
    According to another aspect, for this tool, said at least one bladder is arranged so as to face an internal surface of one of the lateral zones of the barrel when the casing is placed around the surface of revolution.
    According to another aspect, for this tool, the means for adjusting a pressurized fluid are integrated into the tool.
    The invention also provides an oven comprising a shaping tool produced as previously described.
    According to another aspect, for this oven, the means for adjusting a pressurized fluid are integrated into the oven.
    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 nonlimiting examples, with reference to the appended drawings, in which:
    FIG. 1 is a perspective view of a fan casing,
    FIG. 2 is an exploded view of a shaping tool for a fan casing according to one embodiment,
    FIG. 3 is a perspective view of the shaping tool of FIG. 2 according to one embodiment,
    FIG. 4 is a perspective view of a fan casing placed around the shaping tool of FIG. 3 according to one embodiment,
    FIG. 5 is a half-view in radial section of the shaping tool of FIG. 4 along the plane V,
    - Figure 6 is an enlargement of a boxed area C of Figure 5.
    Detailed description of embodiments
    A gas turbine engine generally comprises, from upstream to downstream in the direction of gas flow, a blower, one or more stages of compressors, for example a low pressure compressor and a high pressure compressor, a combustion chamber , one or more stages of turbines, for example a high pressure turbine and a low pressure turbine, and a gas exhaust nozzle.
    The engine is housed inside a housing comprising several parts corresponding to different elements of the engine. Thus, the fan is surrounded for example by a fan casing, which is connected upstream to an air inlet sleeve and downstream to an annular shell of an intermediate casing.
    FIG. 1 illustrates in a known manner a fan casing 1 of an aeronautical gas turbine engine. The casing 1 can be made of a composite material, as described by way of example below.
    The casing 1 is for example made of composite material produced by the formation of a fibrous reinforcement (eg carbon fibers, glass, aramid or ceramic) and densification of the reinforcement by a matrix (eg: polymer matrix of epoxy, bismaleimide or polyimide type) . The reinforcement is formed by winding in layers superimposed on a mandrel of a fibrous texture obtained by three-dimensional weaving with progressive thickness.
    In the example illustrated, the casing 1 is produced from a resin transfer molding process R.TM. Thus the geometry of casing 1 obtained results from the extraction of the latter from a molding cavity. The mandrel can, for example, act as a support for the molding cavity, while a counter-mold closes this cavity.
    The casing 1 comprises a substantially cylindrical barrel 2 centered around an axis X-X, which has a main direction extending along this axis. The barrel 2 of the casing 1 may have a variable thickness. The barrel 2 may in particular comprise an intermediate zone 3 having a greater thickness than the end parts by progressively connecting to the latter. The intermediate zone 3 extends on either side of the location of the blower, upstream and downstream, in order to form a retention zone capable of retaining debris, particles or objects ingested at the inlet of the engine, or coming from the damage of blades of the fan, and projected radially by rotation of the fan, to prevent them from passing through the casing 1 and damaging other parts of the aircraft.
    The intermediate zone 3 is located at a distance from the flanges 5, 6, these extending radially from two respective lateral zones 35, 36 located on either side of the intermediate zone 3.
    The flanges 5, 6 allow the mounting of the casing 1 and its connection with other parts. For example, a first flange, called the upstream flange 5, allows the fixing of an air inlet sleeve while a second flange, called the downstream flange 6, allows the connection of the fan casing 1 with a intermediate casing by means of connecting members (ex: screws).
    The upstream flange 5 and the downstream flange 6 are ideally of annular shape and extend radially with respect to the axis X-X of the fan casing 1.
    During its manufacturing process, the casing 1 can subsequently be drilled so as to be able to allow the assembly of various elements thereon, for example the fixing of acoustic panels or of protective panels forming a fire barrier.
    The fan casing 1 illustrated in FIG. 1 has an ideal geometry with respect to an expected geometry, in particular thanks to the substantially cylindrical shape of its barrel 2 and to the annular shapes of its flanges 5,6.
    In practice, it is commonly observed at the outlet of the mold that the casing 1 is ovalized. Such ovalization can subsequently be accentuated during the various manufacturing or maintenance operations of this casing 1, in particular during machining operations. (e.g. clipping, drilling) or collages (e.g. acoustic panels, fire protection panels). This ovalization can as well be observed on the flanges 5, 6, on the lateral zones 35, 36, as on the intermediate zone 3 forming the retention zone of the casing 1. Such ovalization proves to be particularly problematic both for fixing flanges 5, 6 only for the rotation of the blades of the fan which are commonly mounted opposite an internal surface 4 of the retention zone.
    To counter these deformations, an embodiment of a shaping tool 100 intended to counter the ovalization of predetermined zones of the casing 1 is shown in FIGS. 2 to 7.
    FIGS. 2 and 3 respectively illustrate the tool 100 of conformation alone, that is to say without the casing 1, and an exploded view of this tool 100. The tool 100 has a main direction extending axially along a axis X'-X 'and includes a set of annular parts centered around this axis.
    By way of example, in FIGS. 2 and 3, the shaping tool 100 notably comprises from upstream to downstream, the downstream position being defined relative to a support 7 of this tool 100 such as feet:
    - a downstream rim 8 formed by an annular flange 8-1 and a set of spokes (eight in this example) extending between a central hub and the annular flange 8-1, the hub being centered around the axis X'-X '. The downstream rim 8 is disposed on the support 7 and has a radius greater than the radius of the external surfaces of the flanges 5, 6 of the casing 1 so as to be able to maintain a downstream end of the casing 1 when the latter is placed around the 'tool 100,
    - A second rim 9 formed by an annular flange 9-1 and a set of spokes (eight in this example) extending between a central hub and the annular flange 9-1, the hub being centered around the axis X'-X '. The second rim 9 is disposed upstream relative to the downstream rim 8 and has a radius less than the radius of the internal surfaces 35-1, 36-1 of the lateral zones 35, 36 of the barrel 2 of the casing 1 so as to be able to accommodate on the external surface of the annular flange 9-1 a downstream bladder 101 which will be disposed opposite an internal surface 36-1 of the lateral zone 36, from which extends the downstream flange 6 of the casing 1,
    - A third rim 10 formed by an annular flange 10-1 and a set of spokes (eight in this example) extending between a central hub and the annular flange 10-1, the hub being centered around the axis X'-X '. The third rim 10 is disposed upstream relative to the second rim 9 and has a radius less than the radius of the internal surface 4 of the retention zone of the casing 1 so as to be able to receive on the external surface of the annular flange 10-1 a central bladder 102 which will be disposed opposite the internal surface 4 of the retention zone,
    a fourth rim 11 formed by an annular flange 11-1 and a set of spokes (eight in this example) extending between a central hub and the annular flange 111, the hub being centered around the axis X '-X'. The fourth rim 11 is arranged upstream relative to the third rim 10 and has a radius less than the radius of the internal surfaces 35-1, 36-1 of the lateral zones 35, 36 of the barrel 2 of the casing 1 so as to be able to accommodate on the annular flange 11-1 an upstream bladder 103 which will be disposed opposite an internal surface 35-1 of the lateral zone 35, from which extends the upstream flange 5 of the casing 1,
    - an upstream rim 12 formed by an annular flange 12-1 and a set of spokes (eight in this example) extending between a central hub and the annular flange 12-1, the hub being centered around the axis X'-X '. The upstream rim 12 has a radius greater than the radius of the external surfaces of the flanges 5, 6 of the casing 1 so as to be able to maintain an upstream end of the casing 1 when the latter is placed around the tool 100.
    Furthermore, annular flanges 13, 14, 15, 16 centered around the axis X'-X 'can be interposed between the different rims previously described, as in the example illustrated:
    - A flange 13 is interposed between the downstream rim 8 and the second rim 9 thus ensuring their spacing. The flange makes it possible to provide a downstream support at an axial end of the downstream bladder 101, thus ensuring the maintenance of the latter between the flanges 13, 9-1,14,
    - A flange 14 is interposed between the second rim 9 and the third rim 10 thus ensuring their spacing. The flange makes it possible to provide an upstream support at an axial end of the downstream bladder 101, thus ensuring the maintenance of the latter between the flanges 14, 9-1, 13. The flange 14 also makes it possible to provide downstream support to a axial end of the central bladder 102, thus ensuring that it is maintained between the flanges 14, 10-1, 15,
    - A flange 15 is interposed between the third rim 10 and the fourth rim 11 thus ensuring their spacing. The flange 15 makes it possible to provide an upstream support at an axial end of the central bladder 102, thus ensuring the maintenance of the latter between the flanges 15, 10-1, 14. The flange 15 also makes it possible to provide downstream support to an axial end of the upstream bladder 103, thus ensuring the maintenance of the latter between the flanges 15, 11-1, 16,
    - A flange 16 is interposed between the fourth rim 11 and the upstream rim 12 thus ensuring their spacing. The flange 16 also makes it possible to provide an upstream support at an axial end of the upstream bladder 103, thus ensuring the maintenance of the latter between the flanges 16, 11-1,15.
    The flanges 13, 14, 15, 16 therefore contribute in particular to the support of the bladders 101, 102, 103 as well as to their spacing. Thus, on either side of each bladder 101, 102, 103 the flanges 13, 14, 15, 16 have external surfaces contributing to form parts of the external surface of the tool 100. Once the casing 1 put in place around the tool 100, the internal surface of the casing 1 will therefore in particular be supported on the bladders 101, 102, 103 but also on the flanges 13, 14, 15, 16.
    The assembly of the tool 100 in the absence of the casing 1, consists in practice of sequentially assembling downstream upstream all of the parts shown in FIG. 2, then locking them together using a fastening means 17 passing through each piece along the axis X'-X '. By way of example in this figure, the fixing means 17 is a screw passing through from upstream to downstream all the parts of the tooling 10.
    Thus, the assembly of the rims 9, 10, 11 and the annular flanges 13, 14, 15, 16 for the tool 100 makes it possible to form a drum having a surface of revolution around the axis X'-X '.
    The fan casing 1 can be placed opposite the surface of revolution of this drum, as it can be seen in FIG. 4. To do this, the fan casing 1 is placed around the tool 100 after assembly of the upstream bladder 103 and before assembly of the directory flange 16 separating the upstream rim 12 and the fourth rim 11.
    Thus, after the casing 1 has been placed around the tool drum 10, the internal surface of the fan casing 1 is partly opposite the downstream bladders 101, central 102 and upstream 103 and the flanges 13, 14, 15, 16.
    The bladders 101, 102, 103 are inflatable bladders under the action of a pressurized fluid, for example air, each bladder being connected to adjustment means 200 of a pressurized fluid illustrated in the figure 5. The adjustment means 200 make it possible to apply an isostatic pressure through the bladders 101, 102, 103 and therefore to control, using the pressurized fluid, the swelling of the bladders 101, 102, 103. The bladders 101, 102, 103 are interposed between the casing 1 and the drum of the tool 100. The bladders 101, 102, 103 can thus come to exert a pressure on the internal surface of the casing 1 when the latter is put in place around the tool 100 The application of pressure on the casing 1 is symbolized by the unnumbered arrows in FIG. 6 which is an enlargement of the area C in FIG. 5.
    The arrangement and the number of bladders present on the tooling 100 for shaping is here given by way of illustrative example, a higher or lower number of bladders can be used for the tooling 100. The number of bladders can vary, but it remains important to have these bladders facing areas requiring a cylindrical profile. These zones here include the lateral zones 35, 36 from which the flanges 5, 6 extend in order to guarantee their good attachment to parts upstream and downstream of them and the intermediate zone 3 forming the retention zone because the internal surface 4 of this zone faces the rotor of the turbomachine.
    In general, the shaping tool 100 comprises at least one bladder 101, 102, 103 extending over all or part of the surface of revolution of its drum, that is to say extends over a predetermined area of the surface of revolution of the drum of the tool 100 along the axis X'-X 'and in a radial direction perpendicular to this axis.
    In the examples illustrated, three bladders 101, 102, 103 extend radially over the entire circumference of the drum of the tool 100 and extend partly axially on the surface of revolution of this drum. In other examples not shown, a plurality of bladders may extend radially so as to jointly cover part or all of the circumference of the surface of revolution of the tool drum, or a bladder may cover only part of the circumference of this surface while covering the entire axial direction of this surface.
    Advantageously, the shaping tool 100 may have the function of giving predetermined areas of the internal surface of the fan casing 1 a cylindrical profile. By way of example in FIGS. 1-6, the tool 100 has the function of imparting a cylindrical profile to the internal surfaces 35-1, 36-1 of the lateral zones 35, 36 from which the flanges 5 extend, 6 and the internal surface 4 of the housing retention zone 1. The choice of predetermined zones of the housing 1 is selected by positioning the bladders 101, 102, 103 on the tool 100 for shaping.
    The shaping tool 100 can be used for different life cycles of the fan casing 1, for example during its manufacture or during a repair thereof in order to correct an unwanted ovalization of predetermined areas of the casing 1, and give these areas a cylindrical profile.
    The casing 1 is formed by placing the casing around the surface of revolution of the drum of the tool 100, then by placing the tool 100 in an oven. During the oven drying step, the casing 1 placed on the tool 100 is heated to a predetermined temperature, this temperature being greater than or equal to the glass transition temperature of the casing 1. It thus becomes possible, to apply via the tool 100 a pressure on the internal surface of the casing 1 so as to deform it. It is understood that the material or materials chosen for the production of the tool 100 do not present any possibility of deformation, in particular on the part of the bladders, when they are heated to the predetermined temperature of the oven. The rims and flanges of the tool can for example be made of metal (eg steel, aluminum), resin or more generally of any material which does not have any modification when the oven heats the casing 1 and the tool 100 to the predetermined temperature.
    During the drying of the casing 1, an isostatic pressure is applied through at least one bladder 101, 102, 103. The bladder 101, 102, 103 then exerts a pressure on a part of the internal surface of the casing 1 opposite this bladder, deforming the surface of the casing 1 so as to give it a cylindrical profile. This pressure is maintained thereafter at least until the housing 1 cools down below its glass transition temperature. Once the casing has cooled, the internal surface of the casing 1 facing the bladder 101, 102, 103 then has a substantially cylindrical profile.
    As explained above, the isostatic pressure is controlled by means 200 for adjusting a pressurized fluid connected to the different bladders 101, 102, 103 these means making it possible to adjust the pressure applied through the different bladders. These adjustment means 200 can be directly integrated into the shaping tool 100 or otherwise integrated into the oven.
    We therefore take advantage of a step of placing the housing 1 in an oven to correct the different ovalized areas not desired for the latter. Such an oven setting stage can be envisaged at different stages of the life cycle of the casing 1, by way of example:
    - during the manufacture of the casing 1. For example, use is made of a step of bonding an external element (eg acoustic panel, protective panel) necessitating placing the casing 1 in an oven to correct the ovalization of predetermined areas thereof. The shaping of the casing 1 during this stage proves to be particularly advantageous because it allows both to correct the various cumulative ovalizations of the casing 1 resulting from the successive machining steps of the latter (demolding of the molded part, drilling, bonding previously performed) while minimizing the duration of the housing 1 manufacturing process. In another example, the oven 1 housing can be implemented as an independent step, for example as the last step manufacturing the casing 1,
    - During a step of repairing the casing 1. For example, use is made of a repair step requiring gluing an external panel on the casing 1 via an oven to correct during this step the ovalization of predetermined areas of this one. Once again, the shaping of the casing 1 during this step proves to be particularly advantageous since it allows both the repair and the correction of possible ovalizations of the casing 1 resulting from its use. In another example, placing the casing 1 in an oven can be implemented as an independent repair step, with the sole aim of correcting the ovalization of one or more predetermined zones of the internal surface of the casing 1.
    权利要求:
    Claims (10)
    [1]
    1. A method of shaping a fan casing (1) comprising an internal surface, the method comprising the following steps:
    - positioning of the internal surface of the fan casing (1) around a surface of revolution of a drum of a shaping tool (100),
    - interposition of at least one bladder (101, 102, 103) inflatable under the action of a pressurized fluid between a part of the internal surface of the casing (1) and the tool drum (100), the bladder ( 101, 102, 103) extending over all or part of the surface of revolution of the drum,
    - placing the assembly comprising the housing (1), the tool (100) and said at least one bladder (101, 102, 103) at a predetermined temperature,
    - During placing in the oven, application of an isostatic pressure through said at least one bladder (101, 102, 103) so as to impart a cylindrical profile to the part of the internal surface of the casing (1) facing said at least one bladder (101,102,103).
    [2]
    2. Method according to claim 1 wherein the casing (1) comprises a barrel (2) extending axially between two flanges (5, 6), the barrel (2) comprising an intermediate zone (3) located at a distance from the flanges (5, 6) and two lateral zones (35, 36) on either side of the intermediate zone (3), the flanges (5, 6) extending radially from the lateral zones (35, 36), the intermediate zone (3) forming a retention zone of the casing (1), the isostatic pressure being applied in a bladder (102) disposed opposite an internal surface (4) of the retention zone.
    [3]
    3. Method according to claim 2, in which the isostatic pressure is applied in at least one bladder (101, 103) disposed opposite an internal surface (35-1, 36-1) of one of the lateral zones (35, 36) of the barrel (2).
    [4]
    4. Method according to any one of claims 1 to 3 wherein the step of placing in the oven corresponds to a step of bonding an external element on the casing (1) of the fan.
    [5]
    5. Method according to any one of claims 1 to 4 wherein the oven drying step is implemented during a repair of the fan casing (1).
    [6]
    6. Tool (100) for shaping a fan casing (1) comprising an internal surface, this tool (100) comprising a drum having a surface of revolution and at least one bladder (101, 102, 103) inflatable under the action of a pressurized fluid extending over all or part of the surface of revolution of the drum, the bladder (101, 102, 103) being arranged so as to face a part of the internal surface of the casing (1) blower when it is placed around the surface of revolution, said at least one bladder being connected to means for adjusting (200) a pressurized fluid configured to control using the fluid under pressure the inflation of the bladder (101, 102, 103) so as to give the part of the internal surface of the fan casing (1) a cylindrical profile when the latter is placed around the surface of revolution .
    [7]
    7. Tool (100) according to claim 6, wherein the casing (1) comprises a barrel (2) extending axially between two flanges (5, 6), the barrel (2) comprising an intermediate zone (3) located spaced apart from the flanges (5, 6) and two lateral zones (35, 36) on either side of the intermediate zone (3), the flanges (5, 6) extending radially from the lateral zones (35 , 36), the intermediate zone (3) forming a housing retention zone (1) and for which said at least one bladder (102) is arranged so as to be opposite an internal surface (4) of the zone retention when the housing (1) is placed around the surface of revolution.
    [8]
    8. Tool according to claim 7, in which said at least one bladder (101, 103) is arranged so as to face an internal surface (35-1, 36-1) of one of the lateral zones (35 , 36) of the barrel (2) when the casing (1) is placed around the surface of revolution.
    [9]
    9. Tool according to any one of claims 6 to 8 in which the adjustment means (200) of a pressurized fluid are integrated into the tool (100).
    10. Oven comprising a tool (100) for shaping according to
    15 any one of claims 6 to 8.
    [10]
    11. An oven according to claim 10 wherein the adjustment means (200) of a pressurized fluid are integrated in the oven.
    1/4
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    FR3037854A1|2016-12-30|PROCESS FOR MANUFACTURING A BUMPER CASE IN COMPOSITE MATERIAL WITH INTEGRATED ABRADABLE PANEL FOR A GAS TURBINE ENGINE AND CARTER THUS OBTAINED
    WO2021009457A1|2021-01-21|Method for producing a casing for an aircraft turbine engine
    FR3100834A1|2021-03-19|TURBOMACHINE ACOUSTIC ANNULAR VIROLE AND ASSOCIATED MANUFACTURING PROCESS
    CA2935977C|2022-03-08|Fire protection of a part made of a three-dimensional woven composite material
    FR3089855A1|2020-06-19|COOKING MOLD FOR MANUFACTURING A PART OF A TURBOMACHINE MADE OF A COMPOSITE MATERIAL FROM A PREFORM, METHOD FOR MANUFACTURING A PART BY MEANS OF SUCH A MOLD AND PART OBTAINED BY SUCH A PROCESS
    FR3100738A1|2021-03-19|Method of closing an injection mold using anti-pinch strips
    FR3109180A1|2021-10-15|PROCESS FOR MANUFACTURING A CASING FOR AN AIRCRAFT TURBOMACHINE
    FR3075895A1|2019-06-28|MECHANICAL ASSEMBLY CONSISTING OF ASSEMBLY OF AXISYMETERIC PARTS
    FR3051829A1|2017-12-01|METHOD FOR MANUFACTURING AN ANNULAR CASTER EQUIPPED WITH TURBOMACHINE
    同族专利:
    公开号 | 公开日
    US20180169972A1|2018-06-21|
    US10759122B2|2020-09-01|
    FR3060438B1|2021-01-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1471212A1|2003-04-22|2004-10-27|Snecma Services|Method to replace an abradable layer on a gas turbine fan casing|
    EP2450119A1|2010-11-08|2012-05-09|Rolls-Royce plc|A shape adjusting tool|
    FR2985681A1|2012-01-17|2013-07-19|Aircelle Sa|METHOD AND DEVICE FOR MANUFACTURING A COMPOSITE PART BY DRAPING|
    FR2993490A1|2012-07-17|2014-01-24|Herakles|Mold, used for manufacturing turbine casing of composite material, comprises primary and secondary rings, where primary rings have annular rails having outer contour that corresponds to inner profile of fastening systems of turbine casing|WO2020260835A1|2019-06-27|2020-12-30|Safran Aircraft Engines|Method for manufacturing a housing for a turbine engine and tools for the implementation thereof|
    FR3098543A1|2019-07-10|2021-01-15|Safran Aircraft Engines|PROCESS FOR MANUFACTURING A CASING FOR AN AIRCRAFT TURBOMACHINE|
    FR3106611A1|2020-01-29|2021-07-30|Safran Aircraft Engines|AIRCRAFT TURBOMACHINE CASE AND ITS MANUFACTURING PROCESS|
    FR3106610A1|2020-01-29|2021-07-30|Safran Aircraft Engines|AIRCRAFT TURBOMACHINE CASE AND ITS MANUFACTURING PROCESS|
    FR3106612A1|2020-01-29|2021-07-30|Safran Aircraft Engines|AIRCRAFT TURBOMACHINE CASE AND ITS MANUFACTURING PROCESS|US8966754B2|2006-11-21|2015-03-03|General Electric Company|Methods for reducing stress on composite structures|
    US8061966B2|2007-12-12|2011-11-22|General Electric Company|Composite containment casings|
    US9475218B2|2014-03-21|2016-10-25|General Electric Company|Apparatus and method for forming flanges on components|
    US9669589B2|2015-06-08|2017-06-06|Siemens Aktiengesellschaft|Hybrid solid-inflatable mandrel for blade manufacturing|CN109795611B|2019-02-20|2021-04-16|中国人民解放军海军工程大学|Method for processing light high-rigidity composite pressure-resistant shell structure of underwater vehicle|
    US11162425B2|2019-06-11|2021-11-02|Rolls-Royce Corporation|Assembly fixture|
    WO2021009457A1|2019-07-15|2021-01-21|Safran Aircraft Engines|Method for producing a casing for an aircraft turbine engine|
    法律状态:
    2017-11-20| PLFP| Fee payment|Year of fee payment: 2 |
    2018-06-22| PLSC| Publication of the preliminary search report|Effective date: 20180622 |
    2019-11-20| PLFP| Fee payment|Year of fee payment: 4 |
    2020-11-20| PLFP| Fee payment|Year of fee payment: 5 |
    2021-11-18| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1662542|2016-12-15|
    FR1662542A|FR3060438B1|2016-12-15|2016-12-15|PROCESS AND TOOLS FOR SHAPING A BLOWER HOUSING|FR1662542A| FR3060438B1|2016-12-15|2016-12-15|PROCESS AND TOOLS FOR SHAPING A BLOWER HOUSING|
    US15/841,987| US10759122B2|2016-12-15|2017-12-14|Method and tooling for shaping a fan casing|
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