×

Method for additive manufacturing of three-dimensional articles

  • US 9,789,541 B2
  • Filed: 02/12/2015
  • Issued: 10/17/2017
  • Est. Priority Date: 03/07/2014
  • Status: Active Grant
First Claim
Patent Images

1. A method for forming at least one three-dimensional article without introducing either porosities or incomplete fusion therein through successive fusion of parts of a powder bed, which parts correspond to successive cross sections of the three-dimensional article, said method comprising the steps of:

  • applying a first powder layer on a work table;

    determining, via at least one computer processor of a control unit, a length of at least one of two adjacent of two or more parallel scan lines either applied to the first powder layer or to be applied to the first powder layer;

    setting, via the at least one computer processor of the control unit, a distance between the two adjacent of two or more parallel scan lines as a function of the determined length, wherein the function of the determined length is such that as the determined length increases;

    (a) the distance increases while the determined length is less than a predetermined value, and (b) the distance is a constant value while the determined length is equal to or greater than the predetermined value; and

    directing, via the at least one computer processor of the control unit, a first energy beam from a first energy beam source over said work table so as to cause said first powder layer to fuse in first selected locations according to a corresponding model of said at least one three-dimensional article so as to form a first cross section of said three-dimensional article, where said first energy beam is configured to fuse at least a first region of a first cross section either with said two adjacent of said two or more parallel scan lines extending in a first direction and separated by said set distance, or with at least one additional parallel scan line extending in said first direction and separated from said two adjacent of said two or more parallel scan lines by said set distance.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×