公开(公告)号：US10821517B2

公开(公告)日：2020-11-03

申请号：US16040841

申请日：2018-07-20

Applicant: ARCAM AB

Inventor： Johan Backlund ,  Tomas Lock

IPC: B23K15/00 ,  B23K26/342 ,  B23K26/34 ,  B22F3/105 ,  B23K26/06 ,  B23K26/073 ,  G02B27/09 ,  B29C64/153 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B28B1/00 ,  B28B17/00 ,  B23K26/70 ,  B23K15/02 ,  B29K105/00

Abstract: Provided is an apparatus that includes a high energy beam configured to make a first weld at a first position on a workpiece; at least one deflection lens configured to deflect the high energy beam so as to cause the high energy beam to make a second weld at a second position; at least one focusing lens configured to focus the high energy beam; at least one astigmatism lens; and at least one controller. The controller is configured to shape the high energy beam so that the shape of the high energy beam on the workpiece is longer in a direction parallel to a deflection direction of the high energy beam than in a direction perpendicular to the deflection direction of the high energy beam. A length ratio is varying as a function of the power of the energy beam, while the width in the perpendicular direction is constant.

公开(公告)号：US10814392B2

公开(公告)日：2020-10-27

申请号：US15592714

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 causing said first powder layer to fuse in first selected locations to form a first cross section where said first energy beam is fusing a first region with parallel scan lines in a first direction and a second region with parallel scan lines in a second direction; fusing at least one of the scan lines in said first region in said first direction immediately before fusing at least one of said scan lines in said second region in said second direction; applying a second powder layer and directing the energy beam causing said second powder layer to fuse in second selected locations where the energy beam is fusing said first region with parallel scan lines in a third direction and said second region in a fourth direction.

公开(公告)号：US10586683B2

公开(公告)日：2020-03-10

申请号：US15630199

申请日：2017-06-22

Applicant: Arcam AB

Inventor： Tomas Lock

IPC: H01J37/304 ,  H01J37/305 ,  H01J37/244 ,  B23K15/00 ,  G01T1/29 ,  B33Y50/02 ,  B29C64/386 ,  H01J37/30 ,  B29C64/20 ,  B29C64/153 ,  B33Y10/00 ,  B33Y40/00 ,  B22F3/105 ,  B23K15/02 ,  B28B1/00 ,  B28B17/00 ,  H01J37/317 ,  H01J37/09 ,  B33Y30/00

Abstract: A device for detecting X-rays radiated out of a substrate surface, said device comprising at least one X-ray detector, a resolver grating and a modulator grating, said resolver grating with at least one opening facing towards said X-ray detector is arranged in front of said X-ray detector. Said modulator grating is provided between said resolver grating and said substrate at a predetermined distance from said resolver grating and said substrate, where said modulator grating having a plurality of openings in at least a first direction, wherein said x-rays from said surface is spatially modulated with said modulator grating and resolver grating.

公开(公告)号：US10583483B2

公开(公告)日：2020-03-10

申请号：US15268865

申请日：2016-09-19

Applicant: Arcam AB

Inventor： Kristofer Karlsson

IPC: B29C67/00 ,  B22F3/105 ,  B33Y10/00 ,  B33Y30/00 ,  B23K15/00 ,  B23K15/02 ,  B23K26/342 ,  B23K26/70 ,  B29C64/153 ,  B29C64/20 ,  B29C64/218 ,  B29C64/205 ,  B29C64/321 ,  B29C64/329 ,  B29C64/214 ,  B29C64/255 ,  B29C64/209 ,  B29C64/259 ,  B29L9/00

Abstract: A pivoted powder pushing device is provided, comprising a first portion and a contact member, wherein: the contact member is configured to operatively engage a grip arm of the distribution member when the distribution member is positioned at least in part above the base surface, and the first portion is moved via the engagement of the grip arm and the contact member in a first direction opposite a direction of travel of the distribution member, such that the first portion of said pivoted powder pushing device passes under said distribution member. An associated apparatus, method, and computer program product are also provided.

公开(公告)号：US10549348B2

公开(公告)日：2020-02-04

申请号：US15495225

申请日：2017-04-24

Applicant: Arcam AB

Inventor： Ulf Ackelid

IPC: B22F3/105 ,  B23K15/00 ,  B33Y10/00 ,  B33Y70/00 ,  B23K26/342 ,  B22F3/10 ,  B23K26/00 ,  B23K26/12 ,  C22C14/00 ,  C23C8/08 ,  B23K103/14 ,  B23K15/02 ,  B33Y30/00 ,  B33Y40/00 ,  B23K26/70 ,  B22F3/15 ,  B22F3/24

Abstract: A method comprising the steps of: distributing a titanium alloy or pure titanium powder layer on a work table inside a vacuum chamber, directing at least one electron beam from at least one electron beam source over the work table causing the powder layer to fuse in selected locations, distributing a second powder layer on the work table of a titanium alloy or pure titanium inside the build chamber, directing the at least one electron beam over the work table causing the second powder layer to fuse in selected locations, and releasing a predefined concentration of the gas from the metal powder into the vacuum chamber when at least one of heating or fusing the metal powder layer, wherein at least one gas comprising hydrogen is absorbed into or chemically bonded to the titanium or titanium alloy powder to a concentration of 0.01-0.5% by weight of the hydrogen.

公开(公告)号：US10406599B2

公开(公告)日：2019-09-10

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 ,  B22F5/00 ,  B29C64/153 ,  B29C64/20 ,  B29C64/386 ,  B33Y10/00

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.

公开(公告)号：US20190262900A1

公开(公告)日：2019-08-29

申请号：US16266671

申请日：2019-02-04

Applicant: Arcam AB

Inventor： Kristofer Karlsson

IPC: B22F3/105 ,  B22F1/00

Abstract: Described is a build chamber (1) for an additive manufacturing apparatus (100) for forming a three-dimensional article layer by layer from a powder. The build chamber (1) comprising a build chamber base body (2) and said build chamber base body (2) is formed by at least two segments (4) telescopically coupled together.

公开(公告)号：US20190193193A1

公开(公告)日：2019-06-27

申请号：US16195995

申请日：2018-11-20

Applicant: Arcam AB

Inventor： Mattias Fager

IPC: B23K15/00 ,  H01J37/302 ,  H01J37/317 ,  B33Y30/00 ,  B33Y10/00 ,  B33Y50/02

CPC classification number: B23K15/0086 ,  B29C64/153 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  H01J1/135 ,  H01J1/16 ,  H01J3/027 ,  H01J37/3023 ,  H01J37/3178

Abstract: Provided is an electron beam source for generating an electron beam comprising a cathode, an anode and a grid for regulating an electron beam current. The cathode has a base and a protrusion with sidewalls and a top surface. The base surface and the top surface are essentially flat. The base surface and the top surface are arranged at a predetermined distance from each other. The base is larger than the protrusion. The electron beam source further comprising a control unit adapted for changing an applied voltage to the grid for switching a spot size of the electron beam on a target surface between at least a first a first spot size corresponding to emission from the top surface of the cathode only and to a second spot size corresponding to emission from the top surface and the base surface of the cathode.

公开(公告)号：US20190193155A1

公开(公告)日：2019-06-27

申请号：US16188487

申请日：2018-11-13

Applicant: ARCAM AB

Inventor： Stefan Olausson

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

CPC classification number: B22F3/1055 ,  B22F2003/1056 ,  B22F2301/052 ,  B22F2301/205 ,  B29C64/20 ,  B33Y30/00 ,  B33Y50/02 ,  F16J15/08 ,  F16J15/3228

Abstract: Provided is a seal (19) for sealing against powder between a cylinder (14) of a build tank (5) and a build table (9) arranged in the cylinder of an additive manufacturing apparatus (1) for forming a three-dimensional article layer by layer from a powder. The seal (19) has an endless ring portion (21) for extending along a circumference of an inner surface (20) of the cylinder (14) and abutting against the inner surface (20).

公开(公告)号：US20180369916A1

公开(公告)日：2018-12-27

申请号：US16052365

申请日：2018-08-01

Applicant: Arcam AB

Inventor： Johan Backlund ,  Tomas Lock

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