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    SCANNING STRATEGY FOR PERIMETER AND REGION ISOLATION
    22.
    发明申请
    SCANNING STRATEGY FOR PERIMETER AND REGION ISOLATION 审中-公开

    公开(公告)号：US20190084222A1

    公开(公告)日：2019-03-21

    申请号：US15711808

    申请日：2017-09-21

    Applicant: GENERAL ELECTRIC COMPANY

    Inventor： Lucas JONES ,  Justin MAMRAK

    IPC: B29C64/135 ,  B33Y50/02 ,  B23K26/082 ,  G03F7/00 ,  B22F3/00

    Abstract: A method, apparatus, and program for additive manufacturing. In one aspect, the method and program comprises forming an at least partially solidified portion within a first scan region by irradiating a build material at a first energy density value along a first irradiation path. A second at least partially solidified portion is formed within a second scan region that is spaced with respect to the first scan region, wherein the solidified portion within the first scan region is formed by irradiation a build material at a second energy density value along a second irradiation path. The space between the first scan region and the second scan region is at least partially solidified by irradiating a build material at a third energy density value that less than the first energy density value and the second energy density value.

    AIRFLOW CONTROL FOR ADDITIVE MANUFACTURING
    23.
    发明申请
    AIRFLOW CONTROL FOR ADDITIVE MANUFACTURING 审中-公开

    公开(公告)号：US20190077077A1

    公开(公告)日：2019-03-14

    申请号：US15703600

    申请日：2017-09-13

    Applicant: GENERAL ELECTRIC COMPANY

    Inventor： Andrew MARTIN ,  Justin MAMRAK

    IPC: B29C64/241 ,  B29C64/188 ,  B29C64/268

    Abstract: A method, apparatus, and program for additive manufacturing. The additive manufacturing device includes a positioning mechanism configured to provide independent movement of at least one build unit in at least two dimensions. The build unit may further include a gasflow device for providing a flow zone along a first direction with relation to the build unit. The build unit may further include a powder delivery mechanism and an irradiation beam directing unit. The irradiation bean unit may follow a first irradiation path, wherein the first irradiation path forms at least a first solidification line and at least a second solidification line formed at an angle other than 0° and 180° with respect to the first solidification line. During the formation of the first solidification line, the build unit may be positioned in a first orientation such that the first direction of the flow zone is substantially perpendicular to the first solidification line. During the formation of the second solidification line, the build unit may be positioned in a second orientation such that the flow zone along the first direction is substantially perpendicular to the second solidification line.

    LEG ELIMINATION STRATEGY FOR HATCH PATTERN
    24.
    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
    25.
    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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