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公开(公告)号：US20220118521A1
公开(公告)日：2022-04-21
申请号：US17504016
申请日：2021-10-18
Applicant: Arcam AB
Inventor： Mattias Fager , Simon Blomé , Linus Haglund , Joakim Ålgårdh , Alexander Dahl
Abstract: Systems, apparatus, and methods for weld tapering at a trailing edge using time multiplexing are disclosed. Systems, apparatus, and methods for control of an electron beam for welding using time multiplexing are disclosed. An example apparatus includes memory and at least one processor to execute instructions to at least: in a first portion of a line of an object being formed, control an energy beam at a first position at a first time to form a weld from a powder; and in a second portion of a line of the object being formed, control the energy beam to perform a dispersion sweep at a second position at a second time.
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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.
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公开(公告)号：US20170348792A1
公开(公告)日：2017-12-07
申请号：US15495348
申请日：2017-04-24
Applicant: Arcam AB
Inventor： Mattias Fager
IPC: B23K15/00 , B33Y50/02 , B23K26/342 , B33Y10/00 , B33Y30/00 , B23K15/06 , B23K103/04 , B23K103/18 , B23K103/10 , B23K103/14
CPC classification number: B23K15/0086 , B22F3/1055 , B22F2003/1056 , B23K15/06 , B23K26/342 , B23K2103/05 , B23K2103/10 , B23K2103/14 , B23K2103/26 , B33Y10/00 , B33Y30/00 , B33Y50/02 , Y02P10/295
Abstract: A method is provided for forming a three-dimensional article through successive fusion of parts of a metal powder bed, which parts corresponds to successive cross sections of the three-dimensional article, the method comprising the steps of: directing the at least one electron beam from the at least one electron beam source over a work table causing a powder layer to fuse in selected locations to form a first cross section of the three-dimensional article, preheating, with the at least one electron beam, an area of non-fused powder to a temperature within a predetermined temperature range a predetermined distance in Z-direction before the area is to be fused, where the area times the distance in z-direction is defining a preheating volume of non-fused powder when the three dimensional article is finished.
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公开(公告)号：US09789541B2
公开(公告)日：2017-10-17
申请号：US14621209
申请日：2015-02-12
Applicant: Arcam AB
Inventor： Mattias Fager
CPC classification number: B22F3/1055 , B22F2003/1057 , B28B1/001 , B29C64/153 , B29C64/20 , B29C64/386 , B29K2105/251 , B33Y10/00 , B33Y30/00 , B33Y50/02
Abstract: A method for forming at least one three-dimensional article through successive fusion of parts of a powder bed, which parts correspond to successive cross sections of the three-dimensional article, the method comprising the steps of: providing a model of the at least one three-dimensional article; applying a first powder layer on a work table; directing a first energy beam from a first energy beam source over the work table causing the first powder layer to fuse in first selected locations according to corresponding models to form a first cross section of the three-dimensional article, where the first energy beam is fusing at least a first region of a first cross section with parallel scan lines in a first direction; varying a distance between two adjacent scan lines, which are used for fusing the powder layer, as a function of a mean length of the two adjacent scan lines.
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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
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.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20180229305A1
公开(公告)日：2018-08-16
申请号：US15951979
申请日：2018-04-12
Applicant: Arcam AB
Inventor： Mattias Fager
IPC: B22F3/105 , B29C64/153 , B28B1/00 , B29C64/20 , B33Y50/02 , B33Y10/00 , B33Y30/00 , B29K105/00
CPC classification number: B22F3/1055 , B22F2003/1057 , B28B1/001 , B29C64/153 , B29C64/20 , B29C64/386 , B29K2105/251 , B33Y10/00 , B33Y30/00 , B33Y50/02
Abstract: A computer program product is configured for forming at least one three-dimensional article through successive fusion of parts of a powder bed, which parts correspond to successive cross sections of the three-dimensional article, by: providing a model of the at least one three-dimensional article; applying a first powder layer on a work table; directing a first energy beam from a first energy beam source over the work table causing the first powder layer to fuse in first selected locations according to corresponding models to form a first cross section of the three-dimensional article, where the first energy beam is fusing at least a first region of a first cross section with parallel scan lines in a first direction; varying a distance between two adjacent scan lines, which are used for fusing the powder layer, as a function of a mean length of the two adjacent scan lines.
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公开(公告)号：US20150174695A1
公开(公告)日：2015-06-25
申请号：US14547538
申请日：2014-11-19
Applicant: Arcam AB
Inventor： Isak Elfstroem , Calle Hellestam , Mattias Fager
CPC classification number: B23K15/0086 , B22F3/1055 , B23K15/02 , B23K15/10 , B23K26/08 , B29C64/153 , B29C64/386 , Y02P10/295
Abstract: The invention relates to a method for forming a three-dimensional article through successive fusion of locations of a powder bed. The method comprising: providing a model of said three-dimensional article; applying a powder layer on a work table; determining a maximum scan length of an energy beam; directing said energy beam from a first energy beam source over said work table with constant energy causing said first powder layer to fuse in first selected locations according to said model to form a first cross section of said three-dimensional article, wherein locations with a shorter scan length than said maximum scan length is provided with a time sink before and/or after said scan line so that the time period between each two adjacent scan lines is constant throughout the manufacture of said three-dimensional article.
Abstract translation: 本发明涉及通过粉末床位置的连续熔化来形成三维制品的方法。 该方法包括：提供所述三维制品的模型; 在工作台上涂抹粉末层; 确定能量束的最大扫描长度; 将来自第一能量束源的所述能量束以恒定能量引导到所述工作台上，使得所述第一粉末层根据所述模型在第一选定位置融合，以形成所述三维制品的第一横截面，其中具有较短的位置 在所述扫描线之前和/或之后，在所述最大扫描长度上的扫描长度设置有时间信号，使得在所述三维制品的制造过程中，每两条相邻扫描线之间的时间段是恒定的。
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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
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.
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9.发明授权公开(公告)号：US10071424B2
公开(公告)日：2018-09-11
申请号：US15951979
申请日：2018-04-12
Applicant: Arcam AB
Inventor： Mattias Fager
IPC: B33Y80/00 , B22F3/105 , B28B1/00 , B29C64/153 , B29C64/20 , B33Y10/00 , B33Y50/02 , B29K105/00 , B33Y30/00
CPC classification number: B22F3/1055 , B22F2003/1057 , B28B1/001 , B29C64/153 , B29C64/20 , B29C64/386 , B29K2105/251 , B33Y10/00 , B33Y30/00 , B33Y50/02
Abstract: A computer program product is configured for forming at least one three-dimensional article through successive fusion of parts of a powder bed, which parts correspond to successive cross sections of the three-dimensional article, by: providing a model of the at least one three-dimensional article; applying a first powder layer on a work table; directing a first energy beam from a first energy beam source over the work table causing the first powder layer to fuse in first selected locations according to corresponding models to form a first cross section of the three-dimensional article, where the first energy beam is fusing at least a first region of a first cross section with parallel scan lines in a first direction; varying a distance between two adjacent scan lines, which are used for fusing the powder layer, as a function of a mean length of the two adjacent scan lines.
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公开(公告)号：US20170136541A1
公开(公告)日：2017-05-18
申请号：US15290635
申请日：2016-10-11
Applicant: Arcam AB
Inventor： Mattias Fager
Abstract: The present invention relates to a method for prolonging lifetime of a triod electron beam source when 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 steps of: adjusting a cathode heating power at a predetermined value above a threshold heating value, which threshold heating value creates a predetermined X-ray signal emanating from the triod electron beam source, fusing the three-dimensional article with the electron beam source having the cathode heating power at a predetermined value above a threshold heating value.
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