US 12,280,538 B2
Additive manufacturing methods and systems with two beams traveling along opposing, wobbling paths
Christopher Darby Immer, Niskayuna, NY (US); Robert John Filkins, Niskayuna, NY (US); Victor Petrovich Ostroverkhov, Ballston Lake, NY (US); and Michael Robert Tucker, Niskayuna, NY (US)
Assigned to General Electric Company, Evendale, OH (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Jul. 15, 2022, as Appl. No. 17/865,493.
Prior Publication US 2024/0017482 A1, Jan. 18, 2024
Int. Cl. B29C 64/153 (2017.01); B22F 10/28 (2021.01); B22F 12/45 (2021.01); B28B 1/00 (2006.01); B29C 64/268 (2017.01); B29C 64/282 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01)
CPC B29C 64/153 (2017.08) [B22F 10/28 (2021.01); B22F 12/45 (2021.01); B28B 1/001 (2013.01); B29C 64/268 (2017.08); B29C 64/282 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12)] 17 Claims
OG exemplary drawing
 
1. A method of additively manufacturing a three-dimensional object, the method comprising:
irradiating a first build plane region using a first energy beam;
irradiating a second build plane region using a second energy beam; and
irradiating an interlace region between the first build plane region and the second build plane region, wherein irradiating the interlace region comprises:
directing the first energy beam along a first oscillating path; and
directing the second energy beam along a second oscillating path intersecting and overlapping with the first oscillating path, the first and second oscillating paths comprising a plurality of oscillations formed by wobbling the first energy beam in a first direction and wobbling the second energy beam in a second, opposite direction, wherein, when the first oscillating path and the second oscillating path overlap in an overlap region within the interlace region, a first power of the first energy beam and a second power of the second energy beam are adjusted to maintain a net power in the overlap region that is equal to a net power elsewhere in the interlace region where just one of the first energy beam and the second energy beam are present, and
wherein the first power of the first energy beam and the second power of the second energy beam are modulated in synchronicity within their own oscillatory motions and with respect to one another.