公开(公告)号：US20210178673A1

公开(公告)日：2021-06-17

申请号：US16712635

申请日：2019-12-12

Applicant: ARCAM AB

Inventor： Kristofer Karlsson

IPC: B29C64/205 ,  B29C64/241 ,  B29C64/25 ,  B29C64/255 ,  B29C64/153 ,  B29C64/245

Abstract: An additive manufacturing apparatus for forming a three-dimensional article through successive fusion of parts of layers of a powder material, which parts correspond to successive cross-sections of the three-dimensional article includes a process chamber housing enclosing a process chamber. A rotatable support conveyor is rotatably connected to a bottom of the process chamber housing by a rotatable shaft. The rotatable support conveyor includes an opening that extends therethrough for dispensing powder material from a powder storage vessel located on the rotatable support conveyor and a powder distributor that includes a rake portion that is located between the rotatable support conveyor and the bottom of the process chamber housing.

公开(公告)号：US20210001551A1

公开(公告)日：2021-01-07

申请号：US17019938

申请日：2020-09-14

Applicant: Arcam AB

Inventor： Kristofer Karlsson

IPC: B29C64/25 ,  B29C64/245 ,  B23K15/00 ,  B22F3/105 ,  B23K15/06 ,  B29C64/268 ,  B33Y30/00 ,  B33Y10/00 ,  B33Y50/02 ,  B29C64/153 ,  B22F1/00

Abstract: Described is an additive manufacturing apparatus that includes a telescopic build tank operatively connected at opposing ends to a powder table and a build table. The telescopic build tank includes at least two segments telescopically coupled 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.

公开(公告)号：US20200331090A1

公开(公告)日：2020-10-22

申请号：US16385417

申请日：2019-04-16

Applicant: AP&C Advanced Powders & Coatings Inc. ,  Arcam AB

Inventor： Frederic Larouche ,  Isak Elfström

IPC: B23K15/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/153 ,  B29C64/20 ,  B29C64/393

Abstract: An electron beam melting machine and a method of operation are provided which maintains constant energy absorption within a build layer by adjusting an incident energy level to compensate for energy not absorbed by the additive powder. This unabsorbed energy is detected in the form of electron emissions, which include secondary electrons, backscattered electrons, and/or electrons which are transmitted through the build platform.

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.

公开(公告)号：US20190262899A1

公开(公告)日：2019-08-29

申请号：US16266576

申请日：2019-02-04

Applicant: Arcam AB

Inventor： Kristofer Karlsson

IPC: B22F3/105 ,  B22F1/00

Abstract: 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.

公开(公告)号：US20190160806A1

公开(公告)日：2019-05-30

申请号：US16154444

申请日：2018-10-08

Applicant: Arcam AB

Inventor： Christian Ekberg

IPC: B33Y50/02 ,  B33Y40/00 ,  B33Y10/00 ,  B33Y30/00 ,  G06F17/50

Abstract: Described is a method for analyzing a build layer (1; 11) in an additive manufacturing machine when forming a three-dimensional article layer by layer by successive fusion of selected areas of powder layers, which selected areas correspond to successive layers of the three-dimensional article. The method comprises the steps of radiating a portion (4; 14) of the build layer (1; 11) by an energy beam and detecting particles emitted, backscattered or reflected from the radiated portion of the build layer, and scanning the portion (4; 14) of the build layer by moving the energy beam along a main path (5; 15) and simultaneously moving the energy beam back-and-forth across the main path in a meandering pattern (6; 16).

公开(公告)号：US20190147578A1

公开(公告)日：2019-05-16

申请号：US16154374

申请日：2018-10-08

Applicant: ARCAM AB

Inventor： Calle Hellestam ,  Mattias Fager

IPC: G06T7/00 ,  H01J37/22

CPC classification number: G06T7/001 ,  B22F3/1055 ,  B29C64/153 ,  B29C64/393 ,  B33Y30/00 ,  B33Y40/00 ,  H01J3/028 ,  H01J37/222 ,  H01J37/304 ,  H01J2237/065 ,  H01J2237/30433 ,  H01J2237/3128

Abstract: A method for detecting electron beam filament wear in an electron beam source, the method comprising the steps of: enlarging a beam spot emanating from the electron beam source on a work table to a predetermined minimum size, capturing an image of the beam spot on the work table by a camera, comparing the captured image of the beam spot with a reference image, and detecting filament wear if the captured image is deviating more than a predetermined value from the reference image.

公开(公告)号：US20190099809A1

公开(公告)日：2019-04-04

申请号：US16103686

申请日：2018-08-14

Applicant: Arcam AB

Inventor： Calle Hellestam

IPC: B22F3/105 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B22F3/10

Abstract: A method for forming at least one three-dimensional article through successive fusion of parts of a powder bed on a support structure, the method comprising the steps of: providing at least one model of the three-dimensional article, lowering the support structure a predetermined distance and rotating the support structure a predetermined angle in a first direction before applying a first powder layer covering the lowered and rotated support structure, rotating the at least one model by the predetermined angle in the first direction before directing the at least one first energy beam from the at least one first energy beam source at selected locations for fusing the first powder layer, the at least one first energy beam source causing the first powder layer on the stationary support structure which is stationary to fuse in the selected locations according to the model to form first portions of the three-dimensional article.

公开(公告)号：US10189086B2

公开(公告)日：2019-01-29

申请号：US14350767

申请日：2012-12-18

Applicant: ARCAM AB

Inventor： Calle Hellestam ,  Jenny Olsson ,  Isak Elfstroem

IPC: B22F3/105 ,  B22F3/00 ,  B33Y30/00 ,  B33Y10/00 ,  B22F3/11 ,  B29C64/153 ,  B29K105/04

Abstract: Disclosed is a method for manufacturing three-dimensional articles with porosity. A model is created of a porous structure, said creating step comprising the steps of: defining a three-dimensional space comprising a predetermined pattern of nodes, wherein said nodes are connected together in a predetermined manner with struts, moving each node in said three-dimensional space a randomized distance, which distance is less than a predetermined value and in a randomized direction, slicing said three-dimensional space into a predetermined number of two-dimensional layers with a predetermined thickness, slicing said three-dimensional article into two-dimensional layers with a predetermined thickness, applying one two-dimensional layer of said article on one two-dimensional layer of said porous structure resulting in a porous two-dimensional layer of said article, repeating said applying step for all two dimensional layers of said article, manufacturing the three-dimensional article with porosity according to the model by exposing fusible material to an energy source.

公开(公告)号：US10071423B2

公开(公告)日：2018-09-11

申请号：US15921381

申请日：2018-03-14

Applicant: Arcam AB

Inventor： Johan Backlund ,  Tomas Lock

IPC: B33Y10/00 ,  B22F3/105 ,  B33Y30/00 ,  B33Y50/02 ,  B23K15/00 ,  B28B1/00 ,  B28B17/00 ,  B23K26/06 ,  B23K26/073 ,  G02B27/09 ,  B23K26/342 ,  B23K26/70 ,  B23K15/02 ,  B29C64/153 ,  B29C64/386 ,  B29K105/00

CPC classification number: B22F3/1055 ,  B22F2003/1056 ,  B22F2003/1057 ,  B23K15/0013 ,  B23K15/0086 ,  B23K15/02 ,  B23K26/0643 ,  B23K26/0648 ,  B23K26/0732 ,  B23K26/0738 ,  B23K26/342 ,  B23K26/702 ,  B28B1/001 ,  B28B17/0081 ,  B29C64/153 ,  B29C64/386 ,  B29K2105/251 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  G02B27/0911 ,  Y02P10/295

Abstract: Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.