US 12,103,076 B2
Three-dimensional powder bed fusion additive manufacturing apparatus and three-dimensional powder bed fusion additive manufacturing method
Nari Tsutagawa, Tokyo (JP); Takashi Sato, Tokyo (JP); Yohei Daino, Tokyo (JP); Kozo Koiwa, Tokyo (JP); Yuhei Kaneko, Tokyo (JP); and Masahiko Kawakami, Tokyo (JP)
Assigned to JOEL Ltd., Tokyo (JP)
Filed by JEOL Ltd., Tokyo (JP)
Filed on Jul. 15, 2022, as Appl. No. 17/865,632.
Claims priority of application No. 2021-117794 (JP), filed on Jul. 16, 2021.
Prior Publication US 2023/0014614 A1, Jan. 19, 2023
Int. Cl. B22F 10/362 (2021.01); B22F 10/28 (2021.01); B22F 10/366 (2021.01); B22F 12/41 (2021.01); B22F 12/49 (2021.01); B22F 12/50 (2021.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01)
CPC B22F 10/362 (2021.01) [B22F 10/28 (2021.01); B22F 10/366 (2021.01); B22F 12/41 (2021.01); B22F 12/49 (2021.01); B22F 12/50 (2021.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12)] 12 Claims
OG exemplary drawing
 
1. A three-dimensional powder bed fusion additive manufacturing (PBF-AM) apparatus comprising:
a build plate;
a powder application apparatus that applies metal powder onto the build plate to form a powder layer;
a beam irradiation apparatus that irradiates the powder layer with an electron beam; and
a control unit that controls the powder application apparatus and the beam irradiation apparatus, wherein
when the powder layer is preheated by irradiation with the electron beam, the control unit sets a beam size and an irradiation position of the electron beam such that lines of the electron beam do not overlap each other at least at a start of preheating, and controls the beam irradiation apparatus to gradually increase the beam size of the electron beam from the start of preheating to an end of preheating.