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224 条记录 (耗时 0.076 秒)

    Compact build tank for an additive manufacturing apparatus
    92.
    发明授权
    Compact build tank for an additive manufacturing apparatus 有权

    公开(公告)号：US10800101B2

    公开(公告)日：2020-10-13

    申请号：US16266576

    申请日：2019-02-04

    申请人： Arcam AB

    发明人： Kristofer Karlsson

    IPC分类号： B22F3/105 ,  B22F1/00 ,  B29C64/25 ,  B29C64/245 ,  B23K15/00 ,  B23K15/06 ,  B29C64/268 ,  B33Y30/00 ,  B33Y10/00 ,  B33Y50/02 ,  B29C64/153 ,  B33Y40/00 ,  B22F3/10 ,  F16B7/10 ,  B29C64/232 ,  F16B7/20

    摘要： Described is a build chamber that comprises a telescopic build tank operatively connected at opposing ends to a powder table and a build table, the telescopic build tank comprising at least two segments telescopically coupled relative to one another, each of the at least two segments comprising a set of engagement grooves located on an interior surface of the at least two segments and a set of engagement pins located on an exterior surface of the at least two segments. The set of engagement pins is configured to engage with and travel along a corresponding set of engagement grooves of another of the at least two segments, and each engagement groove comprises a first axially extending channel positioned along a single axis and having at least one closed end, the at least one closed end being configured to impede separation of the at least two segments relative to one another.

    Additive manufacturing of three-dimensional articles
    94.
    发明授权
    Additive manufacturing of three-dimensional articles 有权

    公开(公告)号：US10525547B2

    公开(公告)日：2020-01-07

    申请号：US15495323

    申请日：2017-04-24

    申请人： Arcam AB

    发明人： Christian Ekberg

    IPC分类号： B23K15/00 ,  B23K15/06 ,  B23K15/02 ,  B33Y10/00 ,  B33Y50/02 ,  B33Y30/00

    摘要： A method is provided for forming a three-dimensional article through successively depositing individual layers of powder material that are fused together so as to form the article, the method comprising the steps of: providing at least one electron beam source emitting an electron beam for at least one of heating or fusing the powder material, where the electron beam source comprises a cathode, an anode, and a Wehnelt cup between the cathode and anode; providing a guard ring between the Wehnelt cup and the anode and in close proximity to the Wehnelt cup, where the guard ring is having an aperture which is larger than an aperture of the Wehnelt cup; protecting the cathode and/or the Wehnelt cup against vacuum arc discharge energy currents when forming the three-dimensional article by providing the guard ring with a higher negative potential than the Wehnelt cup and cathode.

    Device for controlling additive manufacturing machinery
    96.
    发明授权
    Device for controlling additive manufacturing machinery 有权

    公开(公告)号：US10394223B2

    公开(公告)日：2019-08-27

    申请号：US15599048

    申请日：2017-05-18

    申请人： Honeywell Federal Manufacturing & Technologies, LLC

    发明人： Christian Barr ,  Wesley Everhart

    IPC分类号： G05B19/4099 ,  B33Y30/00 ,  B23K15/00 ,  B23K15/02 ,  B23K15/06 ,  G05B19/416 ,  H01J37/305 ,  H01J37/302 ,  B22F3/105 ,  B33Y50/02

    摘要： A computing device for controlling the operation of an additive manufacturing machine comprises a memory element and a processing element. The memory element is configured to store a three-dimensional model of a part to be manufactured, wherein the three-dimensional model defines a plurality of cross sections of the part. The processing element is in communication with the memory element. The processing element is configured to receive the three-dimensional model, determine a plurality of paths, each path including a plurality of parallel lines, determine a radiation beam power for each line, such that the radiation beam power varies non-linearly according to a length of the line, and determine a radiation beam scan speed for each line, such that the radiation beam scan speed is a function of a temperature of a material used to manufacture the part, the length of the line, and the radiation beam power for the line.