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    Method for additive manufacturing
    1.
    发明授权
    Method for additive manufacturing 有权

    公开(公告)号：US11517964B2

    公开(公告)日：2022-12-06

    申请号：US16548094

    申请日：2019-08-22

    Applicant: Arcam AB

    Inventor： Ulric Ljungblad

    IPC: B22F10/20 ,  B29C64/153 ,  B29C64/268 ,  B33Y10/00 ,  B33Y50/02 ,  B22F10/30

    Abstract: A method for forming a three-dimensional article through successive fusion of parts of a powder bed comprising: providing a model of the three dimensional article, applying a first powder layer on a work table, directing an energy beam over the work table causing the first powder layer to fuse in selected locations according to the model to form a first cross section of the three-dimensional article, applying a second powder layer on the work table, directing the energy beam over the work table causing the second powder layer to fuse in selected locations according to the model to form a second cross section of the three-dimensional article, wherein the second layer is bonded to the first layer, detecting a local thickness in at least two positions in at least the second powder layer, varying an energy beam parameter depending on the detected local thickness of the second powder layer.

    METHOD AND APPARATUS FOR FORMING A THREE-DIMENSIONAL ARTICLE
    2.
    发明申请
    METHOD AND APPARATUS FOR FORMING A THREE-DIMENSIONAL ARTICLE 有权

    公开(公告)号：US20210094100A1

    公开(公告)日：2021-04-01

    申请号：US16498771

    申请日：2017-03-31

    Applicant: ARCAM AB

    Inventor： Ulric Ljungblad

    IPC: B22F10/28 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  B22F10/80 ,  B22F12/60 ,  B22F12/90 ,  B23K15/00

    Abstract: An apparatus for forming a three-dimensional article through successive fusion of parts of a powder bed, which parts corresponds to successive cross sections of the three-dimensional article, said apparatus comprising: a powder distributor configured for evenly distributing a layer of powder on top of a work table provided inside a vacuum chamber; and an electron beam source emanating an electron beam configured for fusing the powder layer in selected locations corresponding to said cross section of the three-dimensional article, wherein: said powder distributor being an elongated rod provided movable at a predetermined distance above the powder bed and with its central axis in parallel with a top surface of said work table, wherein at least one sensor is provided on said powder distributor facing towards said electron beam source, a detector for detecting a signal sent out from said sensor when said sensor is interacting with said electron beam.

    Method and apparatus for producing three-dimensional objects
    3.
    发明授权
    Method and apparatus for producing three-dimensional objects 有权

    公开(公告)号：US10369662B2

    公开(公告)日：2019-08-06

    申请号：US15190877

    申请日：2016-06-23

    Applicant: Arcam AB

    Inventor： Ulric Ljungblad

    IPC: B23K26/32 ,  B33Y50/02 ,  B22F3/105 ,  B33Y30/00 ,  B23K15/00 ,  B23K26/03 ,  B23K26/342 ,  B22F3/00 ,  B29C64/153

    Abstract: The invention concerns a method for producing three-dimensional objects (6) layer by layer using a powdery material (7) which can be solidified by irradiating it with a high-energy beam (4), said method comprising the steps of: applying a first layer of powdery material onto a working area (5); solidifying a part of said first layer by irradiating it with a high-energy beam; and applying a second layer (8) of powdery material onto the first, partly solidified layer. The invention is characterized in that the method comprises the step of: determining a rate at which the temperature of the second layer (8) increases after application onto the first layer. The invention also concerns an apparatus configured to operate according to the above method.

    Method and apparatus for detecting defects in freeform fabrication
    4.
    发明授权
    Method and apparatus for detecting defects in freeform fabrication 有权

    公开(公告)号：US10144063B2

    公开(公告)日：2018-12-04

    申请号：US14349283

    申请日：2012-12-05

    Applicant: ARCAM AB

    Inventor： Ulric Ljungblad

    IPC: B22F3/105 ,  B29C67/00 ,  B32B15/01 ,  C22C38/00 ,  G01N21/95 ,  B22F3/15 ,  C22C14/00 ,  C22C19/07 ,  C22C21/00

    Abstract: A method for detecting defects in three-dimensional articles. Providing a model of said article. Providing a first powder layer on a substrate, directing an energy beam over said substrate causing said first powder layer to fuse in selected locations forming a first cross section of said three-dimensional article, providing a second powder layer on said substrate, directing the energy beam over said substrate causing said second powder layer to fuse in selected locations to form a second cross section of said three-dimensional article. A first and second image of a first and second fusion zone of said first powder layer respectively is captured. Comparing said first and second images with corresponding layers in said model. Detecting a defect in the three-dimensional article if a deviation in said first image with respect to said model is at least partially overlapping a deviation in said second image with respect to said model.

    METHOD AND APPARATUS FOR ADDITIVE MANUFACTURING
    5.
    发明申请
    METHOD AND APPARATUS FOR ADDITIVE MANUFACTURING 有权
    用于添加剂制造的方法和装置

    公开(公告)号：US20150306819A1

    公开(公告)日：2015-10-29

    申请号：US14443016

    申请日：2013-11-19

    Applicant: ARCAM AB

    Inventor： Ulric Ljungblad

    IPC: B29C67/00 ,  B28B1/00 ,  B22F3/105

    CPC classification number: B29C67/0077 ,  B22F3/1055 ,  B22F2003/1056 ,  B28B1/001 ,  B29C64/153 ,  B29C64/20 ,  B29C67/0085 ,  B33Y10/00 ,  B33Y30/00 ,  Y02P10/295

    Abstract: The present invention relates to a method for forming a three-dimensional article through successive fusion of applied powder. Said method comprising the steps of: providing at least one powder hopper comprising powder to be used for forming said three-dimensional article, providing a predetermined amount of powder at a build support, directing an energy beam over said build support causing at least a portion of said powder to sinter and causing at least a portion of said powder to bond to said build support, directing an energy beam over said build support causing said powder to fuse in selected locations according to a model to form a first portion of said three-dimensional article, rotating said build support around an axis of rotation for creating said three-dimensional article, which three-dimensional article is build up layer by layer in a radial direction with respect to said axis of rotation.

    Abstract translation: 本发明涉及一种通过连续熔融施用的粉末形成三维制品的方法。 所述方法包括以下步骤：提供至少一个粉末料斗，其包括用于形成所述三维制品的粉末，在构造支撑件处提供预定量的粉末，将能量束引导到所述构建支撑件上，形成至少一部分 的所述粉末烧结并使所述粉末的至少一部分结合到所述构建支撑件，将能量束引导到所述构建支撑件上，使得所述粉末根据模型在选定位置熔合以形成所述三维构件的第一部分， 围绕用于产生所述三维制品的旋转轴旋转所述构建支撑件，所述三维制品相对于所述旋转轴线在径向方向上逐层地建立。

    Method for additive manufacturing
    6.
    发明授权
    Method for additive manufacturing 有权

    公开(公告)号：US10434572B2

    公开(公告)日：2019-10-08

    申请号：US14547549

    申请日：2014-11-19

    Applicant: Arcam AB

    Inventor： Ulric Ljungblad

    IPC: B22F3/105 ,  B29C64/20 ,  B33Y10/00 ,  B33Y50/02 ,  B29C64/153 ,  B29C64/386

    Abstract: A method for forming a three-dimensional article through successive fusion of parts of a powder bed comprising: providing a model of the three dimensional article, applying a first powder layer on a work table, directing an energy beam over the work table causing the first powder layer to fuse in selected locations according to the model to form a first cross section of the three-dimensional article, applying a second powder layer on the work table, directing the energy beam over the work table causing the second powder layer to fuse in selected locations according to the model to form a second cross section of the three-dimensional article, wherein the second layer is bonded to the first layer, detecting a local thickness in at least two positions in at least the second powder layer, varying an energy beam parameter depending on the detected local thickness of the second powder layer.

    ADDITIVE MANUFACTURING METHOD AND APPARATUS
    7.
    发明申请
    ADDITIVE MANUFACTURING METHOD AND APPARATUS 审中-公开

    公开(公告)号：US20170282248A1

    公开(公告)日：2017-10-05

    申请号：US15630154

    申请日：2017-06-22

    Applicant: Arcam AB

    Inventor： Ulric Ljungblad ,  Martin Wildheim

    IPC: B22F3/105 ,  B22F7/02 ,  B29C67/00

    CPC classification number: B22F3/1055 ,  B22F5/00 ,  B22F7/02 ,  B22F2003/1056 ,  B29C64/153 ,  B29C64/20 ,  B29C64/386 ,  B33Y10/00 ,  Y02P10/295

    Abstract: An apparatus for forming a three-dimensional article is provided, comprising means for providing a predetermined amount of powder, a powder distributor, means for directing an energy beam over a first powder layer causing it fuse in selected locations according to a model, a camera for capturing at least one image of a shape of at least one portion of the predetermined amount of powder that has yet to be initially distributed, the at least one image being captured prior to distribution of an entirety of all portions of the predetermined amount of powder over the surface, and means for comparing at least one value of at least one parameter in the image detected with a corresponding reference parameter value, wherein the at least one parameter is associated with the shape of the powder that has yet to be initially distributed.

    METHOD AND APPARATUS FOR DETECTING DEFECTS IN FREEFORM FABRICATION
    9.
    发明申请
    METHOD AND APPARATUS FOR DETECTING DEFECTS IN FREEFORM FABRICATION 审中-公开
    检测FREEFORM制造缺陷的方法和装置

    公开(公告)号：US20140308153A1

    公开(公告)日：2014-10-16

    申请号：US14349283

    申请日：2012-12-05

    Applicant: ARCAM AB

    Inventor： Ulric Ljungblad

    IPC: B22F3/105

    CPC classification number: B22F3/1055 ,  B22F3/15 ,  B22F2003/1056 ,  B29C64/153 ,  B32B15/01 ,  B32B15/012 ,  B32B15/013 ,  C22C14/00 ,  C22C19/07 ,  C22C21/00 ,  C22C38/00 ,  G01N21/9515 ,  Y02P10/295

    Abstract: A method for detecting defects in three-dimensional articles. Providing a model of said article. Providing a first powder layer on a substrate, directing an energy beam over said substrate causing said first powder layer to fuse in selected locations forming a first cross section of said three-dimensional article, providing a second powder layer on said substrate, directing the energy beam over said substrate causing said second powder layer to fuse in selected locations to form a second cross section of said three-dimensional article. A first and second image of a first and second fusion zone of said first powder layer respectively is captured. Comparing said first and second images with corresponding layers in said model. Detecting a defect in the three-dimensional article if a deviation in said first image with respect to said model is at least partially overlapping a deviation in said second image with respect to said model.

    Abstract translation: 一种检测三维物品缺陷的方法。 提供所述文章的模型。 在衬底上提供第一粉末层，将能量束引导到所述衬底上，使得所述第一粉末层在形成所述三维制品的第一横截面的选定位置融合，在所述衬底上提供第二粉末层， 将所述第二粉末层熔合在所选择的位置以形成所述三维制品的第二横截面。 分别捕获所述第一粉末层的第一和第二熔融区的第一和第二图像。 将所述第一和第二图像与所述模型中的相应层进行比较。 如果所述第一图像相对于所述模型的偏差与所述模型的所述第二图像的偏差至少部分重叠，则检测所述三维制品中的缺陷。

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