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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.


The invention concerns an apparatus (


A method for forming at a three-dimensional article through successively depositing individual layers of powder material that are fused together with at least one energy beam so as to form the article, the method comprising the steps of: generating a model of the three-dimensional article; applying a first powder layer on a work table; directing the at least one energy beam from at least one energy beam source over the work table causing the first powder layer to fuse in first selected locations according to the model to form a first cross section of the three-dimensional article; introducing a predetermined surface topography on the first cross section for reducing thickness variations and or increasing the powder packing density in a powder layer provided on top of the first cross section.


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.


Patent
Arcam | Date: 2015-03-03

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.


Patent
Arcam | Date: 2015-06-25

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.

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