公开(公告)号：US20220143744A1

公开(公告)日：2022-05-12

申请号：US17416185

申请日：2019-03-04

Applicant: Arcam AB

Inventor： Jonas HELLGREN

IPC: B23K26/03 ,  B22F10/28 ,  B22F10/366 ,  B22F12/90 ,  B22F12/49 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B23K26/046 ,  H04N7/18

Abstract: An apparatus for forming at least one three-dimensional article through successive fusion of parts of a powder bed, which parts corresponds to successive cross sections of the three-dimensional article, the apparatus comprising: a powder distributor configured for evenly distributing a layer of powder on top of a work table provided inside a build chamber; and at least one high energy beam source emanating at least one high energy beam configured for fusing the powder layer in selected locations corresponding to the cross section of the three-dimensional article, wherein the apparatus further comprising at least one target area arranged spaced apart from the layer of powder for emanating light when irradiated by the at least one high energy beam.

公开(公告)号：US20220134666A1

公开(公告)日：2022-05-05

申请号：US17089835

申请日：2020-11-05

Applicant: Arcam AB

Inventor： Stefan Olausson ,  Håkan Sjölander

IPC: B29C64/35 ,  B33Y40/00 ,  B24C1/08

Abstract: A blast nozzle for a depowdering apparatus includes an abrasive material inlet fluidly connected to an abrasive material outlet and a fluid inlet fluidly connected to a fluid outlet, where the fluid outlet at least partially surrounds the abrasive material outlet. The fluid outlet is angled with respect to the abrasive material outlet and configured to emit a fluid stream directed to a focal point, the focal point being laterally spaced apart from the blast nozzle in a fluid flow direction.

公开(公告)号：US11292062B2

公开(公告)日：2022-04-05

申请号：US15967155

申请日：2018-04-30

Applicant: Arcam AB

Inventor： Anders Snis

IPC: B22F12/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B23K15/00 ,  B29C64/268 ,  B23K15/06 ,  B29C64/277 ,  B23K26/082 ,  B22F3/10 ,  B23K26/08 ,  C22C1/04 ,  B22F10/10

Abstract: A method for producing three-dimensional objects layer by layer using a powdery material which can be solidified by irradiating it with at least two electron beams, said method comprises a pre-heating step, wherein the pre-heating step comprises the sub-step of scanning a pre-heating powder layer area (100) by scanning a first electron beam in a first region (I) and by scanning a second electron beam in a second region (II) distributed over the pre-heating powder layer area (100), wherein consecutively scanned paths are separated by, at least, a security distance (ΔY), said sub-step further comprising the step of synchronising the preheating of said first and second electron beams when simultaneously preheating said powder material within said first and second regions respectively, so that said first and second electron beams are always separated to each other with at least a minimum security distance (ΔX).

公开(公告)号：US20210394271A1

公开(公告)日：2021-12-23

申请号：US17287760

申请日：2019-04-02

Applicant: ARCAM AB

Inventor： Tomas LOCK ,  Björn LÖFVING ,  Markus RAMSPERGER

IPC: B22F10/85 ,  B22F10/70 ,  B22F10/28 ,  B22F12/82

Abstract: A device for viewing and/or illuminating a target surface in an evacuated chamber having condensable vapor therein, the device comprising: a first section with a through hole having a first end with a first opening and a second end with a second opening; and a second section having a chamber comprising a first portion with a first opening, a second portion with a second opening and a gas inlet, where the second opening is covered with a first window, said first section is attached with the first end to the first portion of the chamber allowing free passage between the chamber and the first section, said gas inlet is connectable to a gas reservoir for feeding a gas into the chamber for prohibiting the first window in the chamber for being contaminated of the condensable vapor.

公开(公告)号：US20210178473A1

公开(公告)日：2021-06-17

申请号：US16712619

申请日：2019-12-12

Applicant: ARCAM AB

Inventor： Kristofer Karlsson

IPC: B22F3/105 ,  B33Y30/00

Abstract: An additive manufacturing apparatus includes a process chamber housing enclosing a process chamber. The process chamber housing includes a first separable process chamber housing portion and a second separable process chamber housing portion. The first separable process chamber housing portion includes a top of the process chamber housing and the second separable process chamber housing portion includes a bottom of the process chamber housing. The first separable process chamber housing portion meets the second separable process chamber housing portion at a junction that extends about a periphery of the process chamber housing portion in a closed configuration. The process chamber housing has an open configuration where the first separable process housing portion and the second separable process housing portion are separated to provide an access spacing between the first separable housing portion and the second separable housing portion.

公开(公告)号：US20210178472A1

公开(公告)日：2021-06-17

申请号：US16712597

申请日：2019-12-12

Applicant: ARCAM AB

Inventor： Kristofer Karlsson

IPC: B22F3/105 ,  B33Y40/00

Abstract: An additive manufacturing apparatus includes a process chamber housing with a process chamber. A powder storage vessel is in the process chamber. The powder storage vessel includes a vessel body including a powder storage volume, a floor including a powder delivery opening extending therethrough and a bottom cap including a powder delivery opening extending therethrough. In an open configuration, the powder delivery opening of the bottom cap is aligned with the powder delivery opening of the floor to allow powder material to flow from the powder storage vessel through the powder delivery openings. In a closed configuration, one or both of the vessel body and the bottom cap is rotated relative to the other to misalign the powder delivery openings and inhibit powder material from flowing from the powder storage vessel through the powder delivery openings.

公开(公告)号：US10987752B2

公开(公告)日：2021-04-27

申请号：US15790348

申请日：2017-10-23

Applicant: ARCAM AB

Inventor： Christian Ekberg

IPC: B23K15/00 ,  B23K15/02 ,  B28B1/00 ,  B28B17/00 ,  B29C64/268 ,  B33Y10/00 ,  B33Y50/02 ,  H01J37/302 ,  B22F3/105 ,  B22F7/06 ,  B23K15/06 ,  B29C64/153 ,  B29C64/264 ,  B33Y30/00 ,  H01J3/02 ,  H01J37/06 ,  H01J37/065 ,  H01J37/305 ,  H01J37/315

Abstract: 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 includes: providing at least one electron beam source emitting an electron beam; providing a leakage current detector for sensing a current through the anode and/or the Wehnelt cup; providing a low impedance voltage source connectable to the Wehnelt cup via a switch, where the voltage source is having a more negative potential than a negative potential applied to the cathode; and protecting the cathode against vacuum arc discharge energy currents when forming the three-dimensional article by providing the Wehnelt cup to the low impedance negative voltage by closing the switch when the leakage current detector is sensing a current through the anode and/or the Wehnelt cup which is higher than a predetermined value.

公开(公告)号：US10974448B2

公开(公告)日：2021-04-13

申请号：US16141685

申请日：2018-09-25

Applicant: Arcam AB

Inventor： Ulric Ljungblad ,  Ulf Ackelid

IPC: B29C64/153 ,  B22F3/00 ,  B22F3/105 ,  B29C64/386 ,  B29K105/00 ,  B33Y10/00 ,  B33Y50/02 ,  B28B1/00 ,  B28B17/00 ,  B01J8/04 ,  C01B3/02 ,  C01B3/38 ,  C01B3/48 ,  C01C1/04

Abstract: The present invention relates to 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, the method comprising the step of heating a first portion of a support surface while depositing a layer of powder material on a second portion of the support surface.

公开(公告)号：US20210023793A1

公开(公告)日：2021-01-28

申请号：US16523492

申请日：2019-07-26

Applicant: ARCAM AB

Inventor： Björn Löfving ,  Kristofer Karlsson

IPC: B29C64/393 ,  B29C64/153 ,  B29C64/205 ,  B29C64/245 ,  B29C64/255 ,  B29C64/268

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：US10814393B2

公开(公告)日：2020-10-27

申请号：US15592752

申请日：2017-05-11

Applicant: Arcam AB

Inventor： Calle Hellestam

IPC: B22F3/105 ,  B28B1/00 ,  B33Y10/00 ,  B29C64/153 ,  B29C64/386 ,  G05B19/4099 ,  B33Y30/00 ,  B33Y50/02 ,  B28B17/00 ,  B29K105/00

Abstract: An apparatus comprising a control unit configured for applying a first powder layer on a work table, directing a first energy beam from a first energy beam source over said work table causing said first powder layer to fuse in first selected locations according to a corresponding model to form a first cross section of said at least one three-dimensional article, where said first energy beam is fusing a first article with parallel scan lines in a first direction, fusing a second scan line in said first direction in said first layer in said first article within a predetermined time interval after fusing a first scan line in said first article, wherein at least one intermediate scan line is fused within said time interval at another predetermined position and where said first and second scan lines are adjacent to each other.