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    LARGE SCALE ADDITIVE MACHINE
    12.
    发明申请
    LARGE SCALE ADDITIVE MACHINE 审中-公开

    公开(公告)号：US20180281068A1

    公开(公告)日：2018-10-04

    申请号：US15996058

    申请日：2018-06-01

    Applicant: GENERAL ELECTRIC COMPANY

    Inventor： MacKenzie Ryan REDDING ,  Zachary David FIELDMAN ,  Justin MAMRAK

    IPC: B22F3/105 ,  B33Y30/00 ,  B23K15/00 ,  B33Y50/02 ,  B33Y10/00 ,  B29C64/153 ,  B23K26/342 ,  B23K26/14 ,  B23K26/08

    Abstract: The present disclosure generally relates to additive manufacturing systems and methods on a large-scale format. One aspect involves a build unit that can be moved around in three dimensions by a positioning system, building separate portions of a large object. The build unit has an energy directing device that directs, e.g., laser or e-beam irradiation onto a powder layer. In the case of laser irradiation, the build volume may have a gasflow device that provides laminar gas flow to a laminar flow zone above the layer of powder. This allows for efficient removal of the smoke, condensates, and other impurities produced by irradiating the powder (the “gas plume”) without excessively disturbing the powder layer. The build unit may also have a recoater that allows it to selectively deposit particular quantities of powder in specific locations over a work surface to build large, high quality, high precision objects.

    TRIANGLE HATCH PATTERN FOR ADDITIVE MANUFACTURING
    14.
    发明申请
    TRIANGLE HATCH PATTERN FOR ADDITIVE MANUFACTURING 审中-公开

    公开(公告)号：US20180250743A1

    公开(公告)日：2018-09-06

    申请号：US15451108

    申请日：2017-03-06

    Applicant: GENERAL ELECTRIC COMPANY

    Inventor： Justin MAMRAK ,  MacKenzie Ryan REDDING

    IPC: B22F3/105 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B23K26/342 ,  B23K15/00 ,  B23K26/082

    Abstract: A scanning technique for the additive manufacturing of an object. The method comprises the irradiation of a portion of a given layer of powder to form a fused region using an energy source. When forming an object layer by layer, the irradiation follows a first irradiation path bounded by a first stripe, wherein the first irradiation path is formed at an oblique angle with respect to the first stripe. The first irradiation path further comprises at least a first scan vector and a second scan vector at least partially melting a powder and forming a first solidification line and second solidification line respectively, wherein the first solidification intersects and forms an oblique angle with respect to the second solidification line. After a layer is completed, a subsequent layer of powder is provided over the completed layer, and the subsequent layer of powder is irradiated. Irradiation of the subsequent layer of powder follows a second irradiation path bounded by a second stripe. wherein the second irradiation path is formed at an oblique angle with respect to the second stripe. The first irradiation path further comprises at least a third scan vector and a fourth scan vector at least partially melting a powder and forming a third solidification line and fourth solidification line respectively, wherein the third solidification intersects and forms an oblique angle with respect to the fourth solidification line

    LEG ELIMINATION STRATEGY FOR HATCH PATTERN
    19.
    发明申请
    LEG ELIMINATION STRATEGY FOR HATCH PATTERN 审中-公开

    公开(公告)号：US20180250742A1

    公开(公告)日：2018-09-06

    申请号：US15451043

    申请日：2017-03-06

    Applicant: GENERAL ELECTRIC COMPANY

    Inventor： Justin MAMRAK ,  MacKenzie Ryan REDDING

    IPC: B22F3/105 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B23K15/00 ,  B23K15/02 ,  B23K26/342 ,  B23K26/70

    Abstract: A scanning technique for the additive manufacturing of an object. The method comprises the irradiation a portion of a given layer of powder to form a fused region using an energy source. When forming an object layer by layer, the irradiation follows a first irradiation pattern at least partially bounded by a stripe region. When forming the first fused region using a first irradiation pattern a first series of solidification lines are formed, at angle other than 90° with respect to a substantially linear stripe region boundary. A series of second solidification lines are formed that intersecting the end of the first solidification line at a first angle other than 0° and 180° with respect to the first solidification line. A third series of solidification lines are formed that are substantially parallel to a first series of solidification lines and intersect one of the second solidification lines.

    ADDITIVE MANUFACTURING USING A MOBILE SCAN AREA
    20.
    发明申请
    ADDITIVE MANUFACTURING USING A MOBILE SCAN AREA 审中-公开

    公开(公告)号：US20180221954A1

    公开(公告)日：2018-08-09

    申请号：US15945082

    申请日：2018-04-04

    Applicant: General Electric Company

    Inventor： MacKenzie Ryan REDDING ,  Justin MAMRAK ,  Zachary David FIELDMAN

    IPC: B22F3/105 ,  B29C64/364 ,  B29C64/268 ,  B23K15/00 ,  B23K37/02 ,  B23K26/08 ,  B23K26/14 ,  B23K26/342 ,  B33Y50/02 ,  B33Y30/00 ,  B33Y10/00 ,  B29C64/153

    Abstract: The present disclosure generally relates to additive manufacturing systems and methods on a large-scale format. One aspect involves a build unit that can be moved around in three dimensions by a positioning system, building separate portions of a large object. The build unit has an energy directing device that directs, e.g., laser or e-beam irradiation onto a powder layer. In the case of laser irradiation, the build volume may have a gasflow device that provides laminar gas flow to a laminar flow zone above the layer of powder. This allows for efficient removal of the smoke, condensates, and other impurities produced by irradiating the powder (the “gas plume”) without excessively disturbing the powder layer. The build unit may also have a recoater that allows it to selectively deposit particular quantities of powder in specific locations over a work surface to build large, high quality, high precision objects.

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