Molndal, Sweden
Molndal, Sweden

For the British high end hi-fi manufacturer please see A&R Cambridge Ltd Arcam, or Arcam AB, manufactures Electron Beam Melting systems for use in additive manufacturing, which create solid parts from metal powders. In addition to hardware production, Arcam also produces metal powder through AP&C and medical implants through DiSanto Technologies. Arcam AB is a publicly traded company listed on the Stockholm Stock Exchange under ARCM but is also commonly quoted as OTC stock under AMAVF. Arcam AB corporate headquarters are in Sweden. EBM has applications in the medical, aerospace, and automotive industries. Wikipedia.

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Patent
Arcam | Date: 2017-06-28

A method for verifying a size of an energy beam spot, said method comprising the steps of providing a first beam spot having a predetermined size and power at a first position on a work piece, varying a focus and/or astigmatism lens setting for said first beam spot until max intensity for the beam spot is detected, comparing the detected settings of said focus lens and/or astigmatism lens for said maximum intensity of the beam spot with stored settings of said focus lens and/or astigmatism lens for the beam spot with said predetermined size and power, repeating step a-c for different predetermined beam powers, repeating step a-d for different positions on said work piece, wherein said beam spot size is verified if each detected settings of said focus lens and/or astigmatism lens are deviating less than a predetermined value from corresponding stored settings of said focus lens and/or astigmatism lens.


Patent
Arcam | Date: 2017-06-28

A method for forming a three dimensional article (3) through successively depositing individual layers of powder material that are fused together with an electron beam from an electron beam source (6) so as to form the article. Providing a model of said three-dimensional article; a vacuum chamber (20, 20a, 20b) having at least a first (20a) and a second (20b) section, powder material that are fused together is provided in said first section, the at least one electron beam source is provided in said second section, wherein said first and second sections are openly connected to each other. Directing an electron beam from said at least one electron beam source over said work table (2) to fuse in first selected locations according to said model to form a first cross section of said three-dimensional article while supplying a gas (from 46, via 44, 50) to said second section of said vacuum chamber.


Patent
Arcam | Date: 2017-04-24

A method for verifying a size of an energy beam spot, said method comprising the steps of providing a first beam spot having a predetermined size and power at a first position on a work piece, varying a focus and/or astigmatism lens setting for said first beam spot until max intensity for the beam spot is detected, comparing the detected settings of said focus lens and/or astigmatism lens for said maximum intensity of the beam spot with stored settings of said focus lens and/or astigmatism lens for the beam spot with said predetermined size and power, repeating step a-c for different predetermined beam powers, repeating step a-d for different positions on said work piece, wherein said beam spot size is verified if each detected settings of said focus lens and/or astigmatism lens are deviating less than a predetermined value from corresponding stored settings of said focus lens and/or astigmatism lens.


Patent
Arcam | Date: 2017-04-24

A method for verifying a position of an energy beam spot, said method comprising the steps of: providing a calibrated energy beam having a first focus in a at least two positions at a work table, detecting said at least two positions of said energy beam spot on said work table created with said energy beam having said first focus, providing said calibrated energy beam having a second focus in said at least two positions at a work table, detecting said at least two positions of said energy beam spot on said work table created with said energy beam having said second focus, comparing said at least two positions created with said first and second focus, wherein said position of the energy beam is verified if said positions created with said first focus are deviating less than a predetermined distance from said positions created with said second focus.


Patent
Arcam | Date: 2017-06-28

A method for verifying a deflection speed of an energy beam spot, the method comprising the steps of: providing a predetermined pattern on a work table with the energy beam spot while deflecting the energy beam spot with a first deflection speed, detecting first positions of the energy beam spot on the work table created with the first deflection speed, providing the predetermined pattern on a work table with the energy beam spot while deflecting the energy beam spot with a second deflection speed, detecting second positions of the energy beam spot on the work table created with the second deflection speed, comparing the first and second positions, wherein the deflection speed is verified if each one of the first positions are deviating less than a predetermined distance from corresponding second positions.


Patent
Arcam | Date: 2017-02-08

Various embodiments of the present invention relate to a method for welding a workpiece (660) comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam (605), deflecting the high energy beam with at least one deflection lens (640) 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 (630), shaping the high energy beam on said workpiece with at least one astigmatism lens (620) 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.


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.


Provided is a method for forming a three dimensional article comprising the steps of: providing at least one electron beam source emitting an electron beam for at least one of heating or fusing said powder material, where said electron beam source comprises a cathode, an anode, and a grid between said cathode and anode; controlling the electron beam source in at least two modes during said formation of said three dimensional article; applying a predetermined accelerator voltage between said cathode and said anode; applying a predetermined number of different grid voltages between said grid and said cathode for producing a corresponding predetermined number of electron beam currents; and at least one of creating or updating a look-up table or mathematical function during one of the at least two modes, wherein said look-up table or mathematical function defines a relationship between a desired electron beam current and an applied grid voltage.


Patent
Arcam | Date: 2016-12-07

Various embodiments provide a method and apparatus for forming a three-dimensional article through successive fusion of parts of at least one layer of a powder bed provided on a work table in an additive manufacturing machine, which parts corresponds to successive cross sections of the three-dimensional article. The method comprises the steps of: applying a layer of predetermined thickness of powder particles on the work table, applying a coating on at least a portion of the powder particles, which coating is at least partially covering the powder particles, and fusing the powder particles on the work table with an electron beam.


Patent
Arcam | Date: 2016-08-09

A method for non-destructive evaluation of a manufacturing process when 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 collecting an X-ray signal, created by the electron beam, from at least one position of the first and/or second metal powder layer and/or a melt pool of the first and/or second metal powder layer and/or a fused first and/or second powder layer by an X-ray detector, comparing the X-ray signal with a reference signal, alarming if the generated X-ray signal compared to the reference signal is indicating contamination material of larger amount than a predetermined value and/or a deviation in Atomic % of the powder material larger than a predetermined value.

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