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    METHODS FOR FORMING ROTOR BLADES HAVING FOAM CORES
    1.
    发明申请
    METHODS FOR FORMING ROTOR BLADES HAVING FOAM CORES 审中-公开

    公开(公告)号：US20200094450A1

    公开(公告)日：2020-03-26

    申请号：US16141127

    申请日：2018-09-25

    Applicant: Bell Helicopter Textron Inc.

    Inventor： James A. Cordell ,  Suvankar Mishra ,  Andrew Paul Haldeman ,  Jesse J. Wrabel ,  Dalton T. Hampton

    IPC: B29C44/18 ,  B64C11/26 ,  B29C44/34 ,  B29C44/42 ,  B29C44/60

    Abstract: A method is provided in one example embodiment and may include positioning at least one nozzle within a hollow portion of a rotor blade at a distance associated with a span of the rotor blade and providing, via the at least one nozzle, a liquid foam mixture in the hollow portion, wherein the liquid foam expands and becomes a solid foam material that fills the hollow portion of the rotor blade. Another method is provided in another example embodiment and may include providing a plurality of openings for a rotor blade that are positioned proximate to a hollow portion of the rotor blade and providing a liquid foam mixture in the hollow portion of the rotor blade through at least one opening of the rotor blade, wherein the liquid foam mixture expands and becomes a solid foam material that fills the hollow portion of the rotor blade.

    ASSEMBLY FIXTURE WITH ANISOTROPIC THERMAL PROPERTIES
    2.
    发明申请
    ASSEMBLY FIXTURE WITH ANISOTROPIC THERMAL PROPERTIES 审中-公开

    公开(公告)号：US20190084207A1

    公开(公告)日：2019-03-21

    申请号：US15710797

    申请日：2017-09-20

    Applicant: Bell Helicopter Textron Inc.

    Inventor： David G. Carlson ,  Douglas K. Wolfe ,  James A. Cordell

    IPC: B29C47/00 ,  B29C63/00 ,  B64C3/00 ,  B64C11/16 ,  B32B27/02

    Abstract: In one embodiment, a method may comprise heating a composite material into a viscous form, wherein the composite material comprises a thermoplastic and a plurality of reinforcement fibers, wherein the plurality of reinforcement fibers is randomly arranged within the thermoplastic. The method may further comprise extruding a plurality of strands of the composite material, wherein extruding the plurality of strands causes the plurality of reinforcement fibers within each strand to align. The method may further comprise arranging the plurality of strands of the composite material to form an assembly fixture, wherein the assembly fixture comprises an anisotropic thermal expansion property, and wherein the anisotropic thermal expansion property is based on an orientation of the plurality of reinforcement fibers within the assembly fixture.

    Methods for forming rotor blades having foam cores
    3.
    发明授权
    Methods for forming rotor blades having foam cores 有权

    公开(公告)号：US11027465B2

    公开(公告)日：2021-06-08

    申请号：US16141127

    申请日：2018-09-25

    Applicant: Bell Helicopter Textron Inc.

    Inventor： James A. Cordell ,  Suvankar Mishra ,  Andrew Paul Haldeman ,  Jesse J. Wrabel ,  Dalton T. Hampton

    IPC: B29C44/18 ,  B64C11/26 ,  B29C44/34 ,  B29C44/60 ,  B29C44/42 ,  B29L31/08 ,  B64C27/473

    Abstract: A method is provided in one example embodiment and may include positioning at least one nozzle within a hollow portion of a rotor blade at a distance associated with a span of the rotor blade and providing, via the at least one nozzle, a liquid foam mixture in the hollow portion, wherein the liquid foam expands and becomes a solid foam material that fills the hollow portion of the rotor blade. Another method is provided in another example embodiment and may include providing a plurality of openings for a rotor blade that are positioned proximate to a hollow portion of the rotor blade and providing a liquid foam mixture in the hollow portion of the rotor blade through at least one opening of the rotor blade, wherein the liquid foam mixture expands and becomes a solid foam material that fills the hollow portion of the rotor blade.

    ASSEMBLY FIXTURE WITH ANISOTROPIC THERMAL PROPERTIES
    6.
    发明申请
    ASSEMBLY FIXTURE WITH ANISOTROPIC THERMAL PROPERTIES 审中-公开

    公开(公告)号：US20200346382A1

    公开(公告)日：2020-11-05

    申请号：US16814622

    申请日：2020-03-10

    Applicant: Bell Helicopter Textron Inc.

    Inventor： David G. Carlson ,  Douglas K. Wolfe ,  James A. Cordell

    IPC: B29C48/05 ,  B29C63/00 ,  B64C11/16 ,  B32B27/02 ,  B64C3/00 ,  B29C70/52 ,  B29C64/118 ,  B29C33/38

    Abstract: In one embodiment, an assembly fixture may include a base structure including a plurality of strands of a fiber-reinforced thermoplastic material comprising a thermoplastic embedded with a plurality of reinforcement fibers, wherein the plurality of reinforcement fibers is aligned within each strand of the plurality of strands, and wherein the base structure further comprises an anisotropic thermal expansion property based on an orientation of the plurality of reinforcement fibers within the base structure, The assembly fixture may further include a plurality of fastening structures coupled to the base structure, wherein the plurality of fastening structures is configured to fasten a plurality of components of a composite structure for assembly using a heated bonding process.

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