• 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 method for obtaining, by additive manufacturing, a part comprising at least one recess (27), this method including: an additive manufacturing step in one piece of a blank, and said at least one recess (27) contains a support (60) comprising a core (61) in the form of a block of material and cellular elements (S1; S2) which connect the core (61) to the recess; - A step of separating the support (60) from the rest of the blank to release the recess.
    公开号:FR3079151A1
    申请号:FR1852558
    申请日:2018-03-23
    公开日:2019-09-27
    发明作者:Nicolas Ovaere；Jacques Marcel Arthur BUNEL；Thomas Gricourt；Paul Andre Somazzi；Sylvain Zambelli
    申请人:Safran Aircraft Engines SAS；
    IPC主号:
    专利说明:

    OPTIMIZATION OF SUPPORTS FOR THE ADDITIVE MANUFACTURE OF A PART WITH A RECESS
    DESCRIPTION
    TECHNICAL AREA
    The present invention relates to the formation of an aircraft engine bearing support by additive manufacturing.
    GENERAL CONTEXT OF THE INVENTION
    A double-flow turbojet engine has an inlet sleeve receiving the upstream air which is drawn in by a low pressure compressor, before being divided into a central primary flow and a secondary flow surrounding the primary flow. After passing the low pressure compressor, the secondary flow is propelled downstream to generate a thrust by being blown around the primary flow, upstream and downstream being defined relative to the direction of fluid flow in the turbojet .
    After passing the low pressure compressor, the primary flow passes through a high pressure compressor before reaching a combustion chamber. This primary flow is then expanded in a high pressure turbine linked in rotation with the high pressure compressor, then in a low pressure turbine linked in rotation with the low pressure compressor, before being expelled downstream.
    In the case of a double body turbojet, the high pressure compressor and the high pressure turbine are part of a high pressure body which surrounds a low pressure journal by rotating at a speed different from this one, this low pressure journal bearing the low pressure compressor and low pressure turbine.
    The low pressure journal and the high pressure body are carried upstream and downstream by bearings housed in enclosures isolating them from the rest of the engine. Each bearing is lubricated by oil circulating in the enclosure which surrounds it, and which is delimited by fixed elements and by the rotary element which passes through it. Such a bearing is carried by a support while being surrounded by the enclosure.
    Figure 1, of a section of a downstream part of a turbojet engine 1 according to a design possibility that the invention proposes to improve, shows a low pressure journal 2, at the downstream end of which is secured a ferrule 3 which extends radially so as to be secured to discs 4 of a low pressure turbine 5 extending around a downstream portion of the journal 2.
    The pin 2 is surrounded in its downstream region by a bearing support 6 which carries a sleeve 7 intended to receive a roller bearing 8 to support the downstream part of the pin 2, and which is secured to a fixed element 9 of the motor located at its upstream, via a cone 10. This cone 10 widens from its downstream portion where it is secured to the support 6, towards its upstream portion where it is secured to the fixed element 9.
    The cone 10 is surrounded by a cylindrical element 11 secured to its upstream portion which it extends downstream, to delimit with this cone 10 and with the ferrule 3 a portion of an enclosure 12 containing the bearing.
    As can be seen in FIG. 2 of a design possibility that the invention proposes to improve, a skirt 13 and two bodies of revolution 14 and 15 extend the central region of the cone 10 respectively upstream and downstream , this skirt and these members having external diameters of the order of the internal diameter of the cone 10. An upstream support 16 comprising a ring by which it is fixed upstream of the skirt 13 carries a segmented radial seal 17 which delimits a enclosure 18 upstream of the bearing 8. The element of revolution 14 delimits, jointly with the journal 2, two concentric enclosures 19 and 20 situated downstream of the bearing 8.
    Given the constraints of manufacturing and mounting with conventional techniques, these components, namely the support 6, the cone 10, the cylindrical element 11 the skirt 13, the element 14 and the upstream support 16 are fixed to each other. others according to different processes including in particular TIG welding.
    In general, the design and manufacture of a bearing support are complex and costly operations involving a multiplicity of processes.
    The object of the invention is to provide a solution to remedy this drawback.
    STATEMENT OF THE INVENTION
    To this end, the subject of the invention is a process for obtaining by additive manufacturing a part comprising at least one recess, including:
    - a step of forming a raw part by additive manufacturing in one piece on a manufacturing platform, during which:
    at least one recess comprises an upper internal portion which needs to be supported, and a lower internal portion opposite this upper internal portion, and a support is formed in said at least one obviously, this support comprising a core and cellular elements including at least one lower module which connects the lower internal portion to the core, and one upper module which connects the core to the upper internal portion;
    - A step of separating the support from the rest of the blank to release the recess.
    With this solution, the volume of the cellular element is reduced, with the core constituting an intermediate platform which prevents the formation of a cellular element passing through the recess from the lower internal portion to the upper internal portion to support it.
    The invention also relates to a process for obtaining by additive manufacturing a part thus defined, in which the step of separating the support includes:
    - an extraction of the nucleus inducing a rupture of the lower and upper modules SI, S2), and
    - a finishing step to remove residues from the lower and upper modules which remain attached to the recess.
    With this arrangement, the time and machining costs associated with the overall removal of the support are reduced.
    The invention also relates to a process for obtaining by additive manufacturing a part thus defined, in which:
    the lower module is erected from all or at least a part of the lower internal portion, while forming a bearing surface for the formation of the core from a lower core surface facing all or at least part of this lower internal portion, and
    - The upper module is erected from all or at least part of an upper core surface facing the upper internal portion, while forming a bearing surface for the formation of this upper internal portion.
    The invention also relates to a process for obtaining by additive manufacturing a part thus defined, in which the core has a left morphology, by comprising at least one part facing the lower internal portion which does not require to be supported during the fabrication of the core.
    The invention also relates to a process for obtaining by additive manufacturing a part thus defined, in which:
    - The recess is a conduit comprising a cylindrical part and a bulged part which extends the cylindrical part; with
    - The upper internal portion forming a cylinder portion along the cylindrical part and the swollen part;
    - The lower internal portion forming a cylinder portion along the cylindrical part and following an arc groove contour in the bulged part;
    the core comprising a portion of constant section in the cylindrical part and a beveled portion which extends the portion of constant section in the bulged part by forming a ramp opposite the lower internal portion along an arc groove contour, this ramp not requiring support during additive manufacturing.
    With the arrangement of the support, the method according to the invention makes it possible to manufacture a recess of complex shape, without the lower module being erected from the lower internal portion along an arc groove contour, difficult to access for machining. .
    The invention also relates to a process for obtaining by additive manufacturing a part thus defined, in which the constant section portion of the core located in the cylindrical part is oblong.
    The invention also relates to a process for obtaining by additive manufacturing a part thus defined, in which the transition between the ramp and the portion of constant section of the core is marked by the interface between the cylindrical part and the bulged part of the recess.
    The invention also relates to a process for obtaining by additive manufacturing a part thus defined, in which the core is provided with a blind hole intended to receive an insertion end of a tool during the step of detaching the supporting the rest of the blank including rotation of the core to break the lower and upper modules.
    The invention also relates to a bearing support obtained with the process for obtaining by additive manufacturing a part thus defined.
    The invention also relates to an aircraft engine comprising a bearing support thus defined.
    BRIEF DESCRIPTION OF THE DRAWINGS
    - Figure 1 already described is a schematic sectional view of a section of a downstream part of a turbojet;
    - Figure 2 already described is a sectional view of a section portion of the downstream part of a turbojet;
    - Figure 3 is a perspective view of a bearing support manufactured in accordance with the invention;
    - Figure 4 is a sectional view of an aircraft engine part equipped with a bearing support manufactured in accordance with the invention;
    - Figure 5 is a schematic representation illustrating a problem of collapse during additive manufacturing of a part;
    - Figure 6 is a cross-sectional view of a bearing support with supports formed according to the state of the art.
    - Figure 7 is a schematic cross-sectional view of a conduit containing a support formed according to the prior art;
    - Figure 8 is a schematic front view of a conduit containing a support formed according to the state of the art;
    - Figure 9 is a cross-sectional view of a blank with a conduit containing a support according to the invention;
    - Figure 10 is a front view of a conduit of a blank, this conduit containing a support according to the invention;
    - Figure 11 is a partial view of a blank and a tool for removing a support according to the invention.
    - Figure 12 is a cross-sectional view of a blank with a conduit containing a support variant according to the invention.
    DETAILED PRESENTATION OF PARTICULAR EMBODIMENTS
    Bearing support
    According to the invention, the bearing support is a metal part formed integrally by additive manufacturing, including in particular a fixing cone and a cylindrical element surrounding this cone, instead of manufacturing them separately for then assembling them.
    This bearing support which appears in Figure 3 where it is identified by 21 comprises a truncated cone or cone 22, having its periphery of large diameter extended by a generally cylindrical element 23, and having its periphery of small diameter extended by a crown 24. The bearing support 21 has a general shape of revolution about an axis AX coinciding with the longitudinal axis of the motor in which it is intended to be mounted, the cone 22 and the cylindrical element 23 having this axis AX as axis of revolution.
    The cylindrical element 23 extends from a first edge 25 to a second circular edge 26 having substantially the same diameters while being spaced from each other along the axis AX. The first edge 25 is the closest to the large-diameter periphery of the cone 22, this cone having a diameter which narrows as it approaches the second edge 26.
    The bearing support 21 further comprises four conduits 27, in which oil and / or air circulates, which pass through the cone 22 radially with respect to the axis AX, extending as far as the vicinity of the cylindrical element 23. An orifice 28 is formed in the cylindrical element opposite each conduit 27.
    This bearing support also includes bosses 29 which protrude radially from the cylindrical element 23 towards the outside while being regularly spaced along its circumference. Each boss 29 has a central window, that is to say an opening bringing the interior and exterior of the cylindrical element 23 into communication.
    FIG. 4 shows an aircraft engine part equipped with a bearing support of the type of support 21 delimiting a main enclosure 31 which surrounds a bearing 32 enclosing an outer bearing ring 33. This main enclosure 31 is delimited by a portion pin 34 of axis AX, by the bearing support 21, the cylindrical element 23 of which is fixed to a fixed element 35 of the motor, and by a ferrule 36, fixed to the crown 24 which extends the bearing support 21 towards the AX axis.
    A series of rings 37, 38, 39, 41 project from the cone 22 towards the axis AX. The first ring 37 protrudes into the main enclosure 31 to carry the ring 33. Each other ring 38, 39 and 41 is joined with a corresponding portion of the pin 34, to delimit with it two annex annular enclosures 42 and 43.
    When the bearing support 21 is integrated in the motor, it is equipped with at least one pipe 44 which passes radially through a window 30, and folds down parallel to the axis AX. This pipe 44 is carried by a holding member 46 fixed to a stiffener 47. This stiffener 47 has an internal crown shape, that is to say projecting radially towards the axis AX around the entire periphery of the cylindrical element , being located in the vicinity of the second edge 26. Such a bearing support typically comprises two pipes of the type of pipe 44, spaced from each other by an angle of thirty degrees around the axis AX.
    Additive manufacturing
    Additive manufacturing on a powder bed means adding material layer by layer, on a manufacturing platform of a dedicated machine, to form a physical object from a digital model. In the case of a metal part, use is made of the laser melting / sintering process which consists in completely or partially melting a thin layer of powder material using a laser at each pass.
    The powder used in laser melting / sintering is not self-supporting. As can be seen in FIG. 5, during the production of a part P, the non-fused / sintered powder of lower layers identified by Cl, that is to say which is not scanned by the laser, is not not capable of supporting the fused powder of a consecutive upper layer CS below a minimum draft angle A between the part P and the production plate T.
    To solve this question, supports are formed while manufacturing the part, which support each region having a draft angle less than the minimum angle A, to avoid local collapse. The part and the supports are integral, manufactured at the same time and made of the same material.
    Once the additive manufacturing is complete, the supports constitute non-functional material and thus must be removed, for example by machining. For this purpose, these supports are entirely cellular elements, generally in the form of lattice or from the ordered stack of structure called lattices, consuming less powder while being more easily removable than a block of uniform material.
    During its manufacture, the bearing support 21 is oriented so that its axis of revolution AX is normal to the plate T, starting with the formation of the first edge 25 of the cylindrical element 23. In the example of the figures, the minimum draft angle A is defined at 40 ° relative to the plate T, and certain regions of the bearing support 21 have a draft angle less than this minimum angle A, and need to be supported.
    In the following description which follows, the terms “lower” and “upper” are to be considered with respect to the direction of manufacture of the bearing support from the production plate T. An element is said to be superior with respect to another if it is farther from the disc tray T than the other, and one element is said to be lower than another if it is less distant from the tray T than the other.
    Manufacturing of the bearing support with supports according to the state of the art
    The example of FIG. 6 shows supports S for the manufacture of the bearing support 21 which are entirely cellular and arranged according to the state of the art, and in which each ring 37, 38, 39 and 41 requires a support erected from the plate T, since the faces from which their manufacture begins are at a distance from the plate T and parallel to the latter, having in fact a clearance angle of 0 °.
    Supports S are also necessary for the formation of conduits 27, orifices 28 and windows 30. Furthermore, the cone 22 includes a through hole 50 formed under conduits 27, which requires locally supporting the ring 39 with a support erected from the ring 41 located below.
    As regards the crown 24 and certain portions of stiffener 47 located at the level of the windows 30 having a radial section having a shape corresponding to that of the letter Γ, they normally extend to the axis AX. This ring 24 and these stiffener portions are thus parallel to the plate T, and in fact need to be supported by supports erected from the bearing support 21, in particular at the level of the cone 22.
    As visible in more detail in FIG. 7, each conduit 27 extends from a first opening 48 situated outside the cone 22 to a second opening 49 which opens inside of it. More particularly, the conduit passes through the cone 22 in the vicinity of its junction 51 with the ring 38, and at its junction 52 with the ring 39.
    Each conduit 27 constitutes a recess with a cylindrical part
    53, extending between the first opening 48 and the junction 52, and a bulged part 54, which extends this cylindrical part 53 up to the second opening 49. The bulged part
    54, that is to say comprising a portion of larger section than the cylindrical part 53, is delimited in particular by the contour of the ring 39 which forms at this location an arc groove 56.
    An upper internal portion of conduit 57 which corresponds to a portion of cylinder over the entire extent of conduit 27, concave with respect to the plate T, comprises tangents which form with the plate T an angle less than the minimum clearance angle A , as shown in FIG. 8. The conduit 27 also includes a lower internal portion of conduit 58 which is located closer to the plate T and opposite the upper internal portion of conduit 57. This lower internal portion of conduit 58 corresponds to a portion of a cylinder in the cylindrical part 53, while it follows the contour of the arc groove 56 in the bulged part 54.
    As shown in FIGS. 7 and 8, the upper internal portion of conduit 57 must necessarily rest on a support S erected from the lower internal portion of conduit 58, including the arc groove 56.
    The withdrawal of such a support S, which is entirely cellular and formed in the arc groove 56, proving difficult taking into account the space, the basic idea of the invention is to propose an alternative solution to this support S known in FIGS. 7 and 8 for the support of the upper internal portion of conduit 57.
    Manufacture of the bearing support according to the method according to the invention
    With reference to FIGS. 9 and 10, the method according to the invention provides for obtaining a raw part, in other words the raw bearing support 21 for manufacturing at the output of the laser fusion / sintering machine, in which each conduit 27 is equipped with 'a support 60. This support 60 comprises a core 61 in the form of a block of material, and lower and upper modules identified respectively by SI and S2 which are cellular elements connecting the core 61 to the conduit 27.
    This core 61 includes an oblong portion of constant section which extends along the axis AY along the cylindrical part 53, as visible in particular in FIG. 10. This oblong portion is extended by a beveled portion in the bulged part 54 , by forming a ramp 62 with a clearance angle of 40 ° with the plate T, that is to say facing the lower internal portion of conduit 58. Thus, the core 61 does not need to be supported during additive manufacturing at the level of the ramp 62 so as to overcome a delicate step of machining the cellular element nestled within the arc groove 56.
    There is a top surface of the core 63 opposite and at a distance from the upper internal portion of the conduit 57, and a lower surface of the core 64 opposite and at a distance from the lower internal portion of the conduit 58 at the level of the cylindrical part 53, whereas the ramp 62 extends the lower core surface 64 in the bulged part 54. The lower module SI connects the lower internal portion of conduit 58, which is located only in the cylindrical part 53, to the lower core surface 64. The upper module S2 in turn connects the upper core surface 63 to the upper internal portion of conduit 57, with the lower and upper modules SI and S2 distinct from each other.
    During manufacture, the supports 60 are constructed at the same time as the bearing support 21. The lower module SI is erected from the lower internal portion of conduit 58 to manufacture the core 61, then the upper module S2 is erected from the upper core surface 63 to support the upper internal portion of conduit 57. In other words, the core 61 constitutes an intermediate platform avoiding the formation of cellular support in the arc groove 56.
    A blind hole 66 is formed in the core 61 to facilitate its extraction from the conduit 27 from the outside of the cone 22 with a tool identified by 67 in FIG. 11. This hole 66 opens at the first opening 48 of the conduit 27 , located outside of the cone 22, and has a square section whose sides are oriented at 45 ° relative to the plate T to overcome additional supports.
    As shown in FIG. 11, the tool 67 comprises a rod 68 having an insertion end 69 with a square section which fits into the hole 66, and a gripping end crossed by a handle 71 extending perpendicular to this rod 68.
    The separation of the support 60 from the rest of the manufacturing stock, carried out by an operator, consists first of all in removing the cellular supports S manufactured to support the orifices 28, by local machining, in order to free access to the blind hole 66. The operator then inserts the insertion end 69 of the tool 67 into the hole 66 through the cylindrical element 23, and exerts a rotary movement of the tool around the rod 68 by means of the handle 71, forming a lever arm, to extract the core 61. The rotation of the core 61 has the effect of breaking the lower and upper modules SI and S2, thus releasing the core 61. Finally, a cloth, in other words an abrasion, is produced to remove possible residues of lower and upper modules SI and S2 which remained attached at the level of the upper and lower internal portions of conduit 57 and 58.
    The arrangement of the support 60 allows the manufacture of the conduit 27 with complex geometry by being only attached to this conduit only to the regions forming a portion of cylinder, thus reducing the time, the difficulty and the machining costs.
    The invention is not limited to the described embodiment of the core 61, and allows the use of various shapes as soon as its extraction is permitted and it performs its platform function avoiding the formation of support in an area whose l machining is difficult to practice.
    In addition, the core 61 may have a specific shape which influences the rupture facies of the lower and upper modules SI and S2 so that they preferentially break at their interface with the conduit 27 while remaining attached to the core, reducing or even eliminating the grooming time. For example, the core may be provided with teeth which protrude from the upper and lower core surfaces 63 and 64 extending to the close vicinity of the upper and lower internal portions of conduit 57 and 58 respectively.
    One can also provide one or more holes 66 of the slot, triangular, hexagonal or other type depending on the tool that one wishes to use, the invention not being limited in that the core imparts a rotational movement to break the lower and upper modules SI and S2.
    The use of a hook is also conceivable for extracting this core 61 from the conduit 27, or even printing repeated shocks on the latter until the lower and upper modules SI and S2 rupture.
    Concretely, the method according to the invention finds its application in the general field of additive manufacturing, by proposing an alternative to the honeycomb support S of the prior art which is simpler to extract, to support at least one internal portion. a recess formed in a room.
    In the example of the figures, the duct 27 constitutes a recess which extends parallel to the plate T. But the method according to the invention is applicable whatever the morphology and the orientation of the recess as soon as there is at least one internal portion, the tangents of which each form with the plate T an angle less than the minimum clearance angle A. The geometry of the core can thus be defined as a function of the morphology of this recess which is not limited to the forms previously described. It should however be noted that the value of this minimum clearance angle A is not necessarily equal to 40 °, since it depends on the additive manufacturing machine on the powder bed used as well as on the nature of the powder. In this regard, the invention could provide that the ramp 62 forms an angle with the plate T of a different value in order to respect a new minimum clearance angle value A.
    In the example of the figures, the ramp 62 of the core 61 is formed opposite the arc groove 56 to avoid the formation of the lower module SI within the latter, but it should be noted that the core may have another ramp location in response to another recess morphology. In addition, in addition to the advantage of simplifying post-manufacturing machining, it should be noted that the existence of such a ramp 62 allows a reduced consumption of powder of metallic material, since at this location the core 61 does not does not need to be supported by the lower internal portion 58 via a cellular element. In this regard, the invention could provide for forming a core 61 with a left shape, with a part facing the lower internal portion 58 which does not need to be supported during the manufacture of this core 61 in only to save material, for example by keeping the ramp 62 in the absence of an arc groove 56. In other words, this part of the core, which does not need to be supported during manufacture, can be formed without the exclusive need to avoid the formation of the lower module SI in a singularity zone which is difficult to access for machining, and this whatever the morphology of the recess.
    According to the same reasoning, to further limit the powder used and / or avoid the implantation of support at the level of singularity zones of a lower internal recess portion, which are difficult to access for machining, the invention could provide that the lower module SI is formed of different cellular fragments identified in Figure 12 by SU, S12, S13 and S14 without limitation. These alveolar fragments, in particular of prismatic shape, are each erected from zones which are on the contrary free of singularity, these singularities being identified here by E. As successive layers of powder, these fragments widen while respecting the angle minimum clearance A to join and form a surface without discontinuity of support for the manufacture of all or part of the lower surface of the core 64 which needs to be supported. In other words, a lower module SI which is erected locally at different locations in the lower internal portion 58 does not depart from the scope of the invention. It is understood here that such alveolar fragment can be formed in order to save material only, in other words without it being necessary to dodge an area difficult to access for machining, as it emerges from Figure 12 between the SU and S12 fragments.
    This arrangement is also applicable to the upper module S2 which can be erected locally from different locations of the upper core surface (63) in the form of fragments S21 and S22 without limitation, while forming a bearing surface without discontinuity for the satisfactory formation of all or part of the upper internal portion (57) which needs to be supported.
    Finally, as can be seen in particular in FIG. 12 and without implied limitation, the invention could provide for further limiting the powder used by providing for forming the core with a cavity between two fragments, here identified by U between the fragments S21 and S22. Such a cavity can also be provided in the core between two fragments of the lower module SI provided that this cavity does not need to be supported. Such a cavity formed in the core opposite the lower internal portion 58 can for example be formed by the joining of two ramps extending at an angle greater than the angle A to form a triangular contour, or alternatively have a broken arc contour, also called a warhead contour, in a cross-sectional view of the recess.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. Method for obtaining, by additive manufacturing, a part comprising at least one recess (27), including:
    - a step of forming a raw part by additive manufacturing in one piece on a manufacturing plate (T), during which:
    at least one recess comprises an upper internal portion (57) which needs to be supported, and a lower internal portion (58) facing this upper internal portion (57), and a support (60) is formed in said at least one obviously, this support comprising a core (61) and cellular elements (SI; S2) including at least one lower module (SI) which connects the lower internal portion (58) to the core (61), and a upper module (S2) which connects the core (61) to the upper internal portion (57);
    - A step of separating the support (60) from the rest of the blank to release the recess (27).
    [2" id="c-fr-0002]
    2. Method according to claim 1, in which the step of separating the support (60) includes:
    an extraction of the core (61) inducing a rupture of the lower and upper modules S1, S2), and
    - a finishing step to remove residues from lower and upper modules (SI, S2) which remain attached to the recess (27).
    [3" id="c-fr-0003]
    3. Method according to claim 1 or 2, in which:
    - the lower module (SI) is erected from all or at least part of the lower internal portion (58), while forming a bearing surface for the formation of the core from a lower core surface (64) facing all or at least part of this lower internal portion (58), and
    - The upper module (S2) is erected from all or at least part of an upper core surface (63) facing the upper internal portion (57), while forming a bearing surface for the formation of this upper internal portion (57).
    [4" id="c-fr-0004]
    4. Method according to one of claims 1 to 3, wherein the core (61) has a left morphology, comprising at least a part opposite the lower internal portion (58) which does not require d 'be supported during the manufacture of the core (61).
    [5" id="c-fr-0005]
    5. Method according to claim 4, in which:
    - The recess is a conduit comprising a cylindrical part (53) and a bulged part (54) which extends the cylindrical part (53); with
    - The upper internal portion (57) forming a cylinder portion along the cylindrical part (53) and the bulged part (54);
    - The lower internal portion (58) forming a cylinder portion along the cylindrical part (53) and following an arc groove contour (56) in the bulged part (54);
    - the core comprising a portion of constant section in the cylindrical part (53) and a bevel portion which extends the portion of constant section in the bulged part (54) by forming a ramp (62) opposite the lower internal portion ( 58) along an arc groove contour, this ramp does not need to be supported during additive manufacturing.
    [6" id="c-fr-0006]
    6. The method of claim 5, wherein the portion of constant section of the core (61) located in the cylindrical portion (53) is oblong.
    [7" id="c-fr-0007]
    7. The method of claim 5, wherein the transition between the ramp (62) and the portion of constant section of the core is marked by the interface between the cylindrical part (53) and the bulged part (54) of the recess .
    [8" id="c-fr-0008]
    8. Method according to one of the preceding claims, wherein the core (61) is provided with a blind hole (66) intended to receive an insertion end (69) of a tool (67) during the step to separate the support (60) from the rest of the blank, including a rotation of the core (61) to break the lower modules and
    5 upper (SI, S2).
    [9" id="c-fr-0009]
    9. bearing support (21) obtained with the method according to one of the preceding claims.
    [10" id="c-fr-0010]
    10. An aircraft engine comprising a bearing support (21) according to claim 9.
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    同族专利:
    公开号 | 公开日
    EP3752310B1|2022-03-16|
    US20210016498A1|2021-01-21|
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    EP3752310A1|2020-12-23|
    WO2019180363A1|2019-09-26|
    FR3079151B1|2020-10-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2719870A1|2012-10-12|2014-04-16|MTU Aero Engines GmbH|Star-shaped bearing support, corresponding method of manufacturing and fluid flow engine|
    FR3013380A1|2013-11-20|2015-05-22|Snecma|AXISYMMETRIC SEAL BEARING SUPPORT SUPPORT|
    GB2541811A|2015-08-28|2017-03-01|Mat Solutions Ltd|Additive manufacturing|
    US20170066083A1|2015-09-09|2017-03-09|Toyota Jidosha Kabushiki Kaisha|Manufacturing method of metal member|
    EP3797973A1|2019-09-30|2021-03-31|Siemens Energy Global GmbH & Co. KG|Improved support structure|
    EP3848135A1|2020-01-10|2021-07-14|Siemens Aktiengesellschaft|Scanning strategy for volume support in additive manufacturing|
    法律状态:
    2019-02-19| PLFP| Fee payment|Year of fee payment: 2 |
    2019-09-27| PLSC| Publication of the preliminary search report|Effective date: 20190927 |
    2020-02-20| PLFP| Fee payment|Year of fee payment: 3 |
    2021-02-18| PLFP| Fee payment|Year of fee payment: 4 |
    2022-02-21| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1852558A|FR3079151B1|2018-03-23|2018-03-23|OPTIMIZATION OF SUPPORTS FOR ADDITIVE PART MANUFACTURING WITH A RECESS|
    FR1852558|2018-03-23|FR1852558A| FR3079151B1|2018-03-23|2018-03-23|OPTIMIZATION OF SUPPORTS FOR ADDITIVE PART MANUFACTURING WITH A RECESS|
    EP19718428.6A| EP3752310B1|2018-03-23|2019-03-19|Optimisation of the supports for the additive manufacturing of a component with a recess|
    PCT/FR2019/050611| WO2019180363A1|2018-03-23|2019-03-19|Optimisation of the supports for the additive manufacturing of a component with a recess|
    CN201980021304.7A| CN111971137A|2018-03-23|2019-03-19|Optimization of a support for additive manufacturing of a component having a recess|
    US17/040,235| US20210016498A1|2018-03-23|2019-03-19|Optimisation of the supports for the additive manufacturing of a component with a recess|
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