公开(公告)号：US11999102B2

公开(公告)日：2024-06-04

申请号：US18077381

申请日：2022-12-08

Applicant: Arcam AB

Inventor： Björn Löfving ,  Kristofer Karlsson

IPC: B29C64/153 ,  B22F10/00 ,  B22F10/28 ,  B22F10/37 ,  B22F10/85 ,  B22F12/60 ,  B22F12/67 ,  B22F12/90 ,  B33Y10/00 ,  G06V10/25 ,  B22F10/10 ,  B22F10/32 ,  B22F10/368 ,  B22F10/38 ,  B22F12/52 ,  B22F12/55 ,  B33Y30/00 ,  B33Y50/02

CPC classification number: B29C64/153 ,  B22F10/00 ,  B22F10/28 ,  B22F10/37 ,  B22F10/85 ,  B22F12/60 ,  B22F12/67 ,  B22F12/90 ,  B33Y10/00 ,  G06V10/25 ,  B22F10/10 ,  B22F10/32 ,  B22F10/368 ,  B22F10/38 ,  B22F12/52 ,  B22F12/55 ,  B33Y30/00 ,  B33Y50/02 ,  B22F2999/00 ,  B22F10/85 ,  B22F10/37 ,  B22F2203/03 ,  B22F2999/00 ,  B22F12/60 ,  B22F12/90 ,  B22F2203/11

Abstract: Devices, systems, and methods for monitoring a powder layer in additive manufacturing are disclosed. A method of monitoring a powder layer includes receiving image data corresponding the powder layer supported by a powder bed within a build chamber from imaging devices, determining leading and trailing regions of interest located adjacent to a leading end and a trailing end of the moving powder distributor, respectively, the leading and trailing regions of interest moving according to movement of the moving powder distributor, selecting at least one point located in the leading region of interest from the image data, determining first characteristics of the point, when the point is located within the trailing region of interest, determining second characteristics of the point, and comparing the first characteristics to the second characteristics.

公开(公告)号：US11541457B2

公开(公告)日：2023-01-03

申请号：US16523484

申请日：2019-07-26

Applicant: ARCAM AB

Inventor： Björn Löfving ,  Kristofer Karlsson

IPC: B29C67/00 ,  B22F10/00 ,  B29C64/153 ,  G06V10/25 ,  B33Y30/00 ,  B33Y50/02 ,  B22F10/10

Abstract: Devices, systems, and methods for monitoring a powder layer in additive manufacturing are disclosed. A method of monitoring a powder layer includes receiving image data corresponding the powder layer supported by a powder bed within a build chamber from imaging devices, determining leading and trailing regions of interest located adjacent to a leading end and a trailing end of the moving powder distributor, respectively, the leading and trailing regions of interest moving according to movement of the moving powder distributor, selecting at least one point located in the leading region of interest from the image data, determining first characteristics of the point, when the point is located within the trailing region of interest, determining second characteristics of the point, and comparing the first characteristics to the second characteristics.

公开(公告)号：US11338519B2

公开(公告)日：2022-05-24

申请号：US16523492

申请日：2019-07-26

Applicant: ARCAM AB

Inventor： Björn Löfving ,  Kristofer Karlsson

IPC: B29C64/393 ,  B29C64/153 ,  B29C64/245 ,  B29C64/255 ,  B29C64/268 ,  B29C64/205 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02 ,  B22F10/85 ,  B29C64/386 ,  B22F12/30 ,  B22F12/50 ,  B22F10/28 ,  B22F10/80 ,  B22F10/37 ,  B22F12/90

Abstract: Devices, systems, and methods for monitoring a powder layer in additive manufacturing are disclosed. A method includes receiving leading and trailing image data from an image signal processor that is optically coupled to a plurality of leading and trailing optical fibers arranged on a moving powder distributor, the leading and trailing image data corresponding to images of the powder layer, selecting at least one point on the powder bed that is located within a leading region of interest, determining first characteristics of the point, when the point is located within a trailing region of interest due to movement of the moving powder distributor, determining second characteristics of the point, and comparing the first characteristics to the second characteristics to monitor the powder layer distributed by the moving powder distributor.

公开(公告)号：US20220143709A1

公开(公告)日：2022-05-12

申请号：US17416209

申请日：2019-03-01

Applicant: Arcam AB

Inventor： Christian EKBERG

IPC: B22F12/90 ,  H01J37/305 ,  H01J37/30 ,  B22F10/80 ,  B22F12/41

Abstract: The present specification relates to an additive manufacturing apparatus comprising an X-ray reference object (18) for calibrating an electron beam unit in the additive manufacturing apparatus by detecting X-rays generated by sweeping an electron beam from the electron beam unit over a reference surface (19) of the X-ray reference object (18) and processing the detected signals, the X-ray reference object (18) comprising a support body (20) that has a top surface (21) and comprises a plurality of holes (22) in the top surface (21), The X-ray reference object (18) comprises a plurality of target members (23) inserted into the plurality of holes (22) of the support body (20). The present specification also relates to an X-ray detector to be used in the additive manufacturing apparatus, and to a method for calibrating such an additive manufacturing apparatus.

公开(公告)号：US20220001452A1

公开(公告)日：2022-01-06

申请号：US17296590

申请日：2019-03-01

Applicant: Arcam AB

Inventor： Kristofer Karlsson ,  Safdar Ali

IPC: B22F10/368 ,  B22F10/28 ,  B22F10/85 ,  B22F12/41 ,  H01J37/21 ,  H01J37/305 ,  H01J37/09

Abstract: An apparatus for forming a three-dimensional article through successively depositing individual layers of powder material that are fused together with an electron beam from an electron beam source so as to form the article according to a computer model thereof. The apparatus includes a chamber a chamber having a first section and a second section openly connected to each other. The first section is configured to receive the individual layers of powder material. The second section comprising an electron beam source, an electromagnetic focus coil having an axially extending, and a reflector coil. The electron beam source is configured to emit an electron beam to fuse the individual layers of powder material. The reflector coil is arranged radially outside the electromagnetic focus coil. The direction of windings of the reflector coil is opposite a direction of windings of the electromagnetic focus coil.

公开(公告)号：US11141790B2

公开(公告)日：2021-10-12

申请号：US16166805

申请日：2018-10-22

Applicant: ARCAM AB

Inventor： Calle Hellestam ,  Jenny Olsson ,  Isak Elfstroem

IPC: B22F3/105 ,  B22F10/10 ,  B33Y30/00 ,  B33Y10/00 ,  B22F3/11 ,  B29C64/153 ,  B22F10/38 ,  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：US11084098B2

公开(公告)日：2021-08-10

申请号：US16052365

申请日：2018-08-01

Applicant: Arcam AB

Inventor： Johan Backlund ,  Tomas Lock

IPC: B22F10/20 ,  B23K26/064 ,  B33Y30/00 ,  B23K26/06 ,  B23K26/073 ,  G02B27/09 ,  B29C64/153 ,  B33Y10/00 ,  B33Y50/02 ,  B23K15/00 ,  B28B1/00 ,  B28B17/00 ,  B23K26/342 ,  B23K26/70 ,  B23K15/02 ,  B22F10/30 ,  B29K105/00

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.

公开(公告)号：US11014161B2

公开(公告)日：2021-05-25

申请号：US15048450

申请日：2016-02-19

Applicant: Arcam AB

Inventor： Isak Elfstroem ,  Mattias Fager

IPC: B22F3/105 ,  B22F10/00 ,  G05B15/02 ,  B33Y10/00 ,  B33Y50/02 ,  B29C64/153 ,  B33Y30/00 ,  B22F10/10

Abstract: Various embodiments of the present invention relate to a method of using of a focus lens in additive manufacturing for forming a three-dimensional article through successive fusion, with a high energy beam, of parts of at least one layer of a powder bed provided on a work table, which parts correspond to successive cross sections of the three dimensional article, said method comprising the step of: using said focus lens for varying a spot size of said high energy beam on said powder bed as a function of an already fused thickness of said three-dimensional article below said powder which is to be fused. The invention is also related to a method for forming a three dimensional article.

公开(公告)号：US20210146621A1

公开(公告)日：2021-05-20

申请号：US16684696

申请日：2019-11-15

Applicant: ARCAM AB

Inventor： Stefan Olausson ,  Håkan Sjölander

IPC: B29C64/35 ,  B29C64/357 ,  B29C64/232 ,  B29C64/393

Abstract: A depowdering apparatus for depowdering a cake comprising a build part includes a depowdering chamber, a blast nozzle, and a build elevator. The depowdering chamber includes a bottom surface and a build inlet extending through the bottom surface, where the build inlet includes an inlet axis that is substantially vertically oriented. The blast nozzle is positioned within the depowdering chamber and oriented to direct a fluid stream toward the inlet axis. The blast nozzle is laterally spaced from the inlet axis and operable to revolve about the inlet axis on a travel path encircling the inlet axis. The build elevator is arranged below the build inlet in a vertical direction and is operable to raise the cake comprising the build part through the build inlet and into the depowdering chamber along the inlet axis as the blast nozzle is revolved about the inlet axis on the travel path.

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.