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    ENHANCED ADDITIVE MANUFACTURING
    12.
    发明申请
    ENHANCED ADDITIVE MANUFACTURING 审中-公开
    增强添加剂制造

    公开(公告)号：US20160052079A1

    公开(公告)日：2016-02-25

    申请号：US14750797

    申请日：2015-06-25

    Applicant: Arcam AB

    Inventor： Ulf Ackelid

    IPC: B23K15/00 ,  B22F3/105

    CPC classification number: B23K15/0086 ,  B22F3/1055 ,  B22F2003/1056 ,  B29C64/153 ,  B29C64/20 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  H01J37/18 ,  H01J37/305 ,  H01J2237/182 ,  Y02P10/295

    Abstract: Various embodiments of the present invention relate to a method for operating an additive manufacturing apparatus in which a three-dimensional article is formed. Said method comprising the steps of: providing a vacuum chamber having at least a first and a second section, wherein said first and second sections are openly connected to each other, providing a predetermined vacuum level inside said vacuum chamber, providing a layer of powder material on a work table in said first section of said vacuum chamber, directing an electron beam from said at least one electron beam source provided in said second section over said work table to fuse in first selected locations according to said model to form a first cross section of said three-dimensional article, purging said second section with a dry gas when said vacuum chamber is open for prohibiting ambient air into said second section.

    Abstract translation: 本发明的各种实施例涉及一种用于操作其中形成三维制品的添加剂制造装置的方法。 所述方法包括以下步骤：提供具有至少第一和第二部分的真空室，其中所述第一和第二部分彼此敞开连接，在所述真空室内提供预定的真空度，提供一层粉末材料 在所述真空室的所述第一部分的工作台上，将设置在所述第二部分中的所述至少一个电子束源的电子束引导到所述工作台上，以根据所述模型在第一选定位置熔化，以形成第一横截面 的所述三维制品，当所述真空室打开以用于禁止环境空气进入所述第二部分时，用干燥气体吹扫所述第二部分。

    ADDITIVE MANUFACTURING OF THREE-DIMENSIONAL ARTICLES
    14.
    发明申请
    ADDITIVE MANUFACTURING OF THREE-DIMENSIONAL ARTICLES 审中-公开

    公开(公告)号：US20180147655A1

    公开(公告)日：2018-05-31

    申请号：US15788976

    申请日：2017-10-20

    Applicant: ARCAM AB

    Inventor： Ulf Ackelid

    IPC: B23K15/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B22F3/15 ,  B23K15/06 ,  B23K15/02

    CPC classification number: B23K15/0086 ,  B22F3/1055 ,  B22F3/1258 ,  B22F3/15 ,  B23K15/004 ,  B23K15/02 ,  B23K15/06 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  Y02P10/295

    Abstract: Provided is a method for forming a three-dimensional article through successively depositing individual layers of powder material that are fused together so as to form the article in a vacuum chamber, said method comprising the steps of: providing at least one electron beam source emitting an electron beam for at least one of heating or fusing said powder material in said vacuum chamber, applying a first set of beam parameters for formation of a fused bulk material of said three-dimensional article, where said bulk material has a predetermined microstructure, applying a second set of beam parameters for formation of a top portion of said three-dimensional article, wherein said second set of beam parameters is applied a predetermined number of layers prior to reaching a top surface of said three-dimensional article for encapsulating chimney porosities into said bulk material. Associated apparatus and computer program product are also provided.

    METHOD FOR ADDITIVE MANUFACTURING
    15.
    发明申请
    METHOD FOR ADDITIVE MANUFACTURING 审中-公开

    公开(公告)号：US20170341142A1

    公开(公告)日：2017-11-30

    申请号：US15495225

    申请日：2017-04-24

    Applicant: Arcam AB

    Inventor： Ulf Ackelid

    IPC: B22F3/105 ,  B33Y40/00 ,  B23K15/00 ,  B23K15/02 ,  B33Y50/02 ,  B33Y10/00 ,  B22F3/10 ,  B22F1/00 ,  B33Y30/00 ,  B23K15/06

    Abstract: A method comprising the steps of: distributing a titanium alloy or pure titanium powder layer on a work table inside a vacuum chamber, directing at least one electron beam from at least one electron beam source over the work table causing the powder layer to fuse in selected locations, distributing a second powder layer on the work table of a titanium alloy or pure titanium inside the build chamber, directing the at least one electron beam over the work table causing the second powder layer to fuse in selected locations, and releasing a predefined concentration of the gas from the metal powder into the vacuum chamber when at least one of heating or fusing the metal powder layer, wherein at least one gas comprising hydrogen is absorbed into or chemically bonded to the titanium or titanium alloy powder to a concentration of 0.01-0.5% by weight of the hydrogen.

    Method and apparatus for additive manufacturing
    18.
    发明授权
    Method and apparatus for additive manufacturing 有权

    公开(公告)号：US10792757B2

    公开(公告)日：2020-10-06

    申请号：US15702445

    申请日：2017-09-12

    Applicant: Arcam AB

    Inventor： Ulf Ackelid

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

    Abstract: A method for forming at least one three-dimensional article through successive fusion of parts of a powder bed, the method comprising the steps of: providing a model of the at least one three dimensional article; applying a first powder layer on at least one build platform; directing an electron beam from an inclined electron beam source over the at least one build platform where a central electron beam emanating from the source is building an angle α with respect to a normal to the build platform≠0°, the directing of the first energy beam causing the first powder layer to fuse in a first selected locations according to the model; rotating or tilting the electron beam source a predetermined angle, directing the electron beam from the tilted or rotated electron beam source causing a first powder layer to fuse in a second selected locations according to the model.

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