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Method for additive manufacturing

  • US 9,676,033 B2
  • Filed: 08/05/2014
  • Issued: 06/13/2017
  • Est. Priority Date: 09/20/2013
  • Status: Active Grant
First Claim
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1. A method for forming at least two separate three-dimensional articles through successive fusion of parts of a powder bed, which parts correspond to successive cross sections of the three-dimensional articles, said method comprising the steps of:

  • providing a model of said at least two separate three-dimensional articles;

    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 the corresponding model to form a first cross section of said at least two separate three-dimensional articles, 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 first predetermined time interval after fusing a first scan line in said first article, where said first and second scan lines are adjacent to each other; and

    during a first time period including respective points in time for fusing the first and second scan lines and the first predetermined time interval between the respective points in time, fusing a first set of at least one intermediate scan line at another predetermined position, wherein said first set of at least one intermediate scan line is in a second article and said second article is different from said first article.

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