US 12,343,799 B2
Three-dimensional manufacturing apparatus
Riku Shimizu, Tokyo (JP); and Yuichiro Nakayama, Tokyo (JP)
Assigned to IHI CORPORATION, Tokyo (JP)
Appl. No. 17/600,097
Filed by IHI CORPORATION, Tokyo (JP)
PCT Filed Mar. 30, 2020, PCT No. PCT/JP2020/014648
§ 371(c)(1), (2) Date Sep. 29, 2021,
PCT Pub. No. WO2020/203992, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-070690 (JP), filed on Apr. 2, 2019.
Prior Publication US 2022/0161331 A1, May 26, 2022
Int. Cl. B22F 12/37 (2021.01); B22F 12/41 (2021.01); B33Y 30/00 (2015.01); B22F 10/28 (2021.01)
CPC B22F 12/37 (2021.01) [B22F 12/41 (2021.01); B33Y 30/00 (2014.12); B22F 10/28 (2021.01)] 4 Claims
OG exemplary drawing
 
1. A three-dimensional manufacturing apparatus which models a three-dimensional modeled object by irradiating a powder material supplied onto a main surface of a table with an energy beam, the three-dimensional manufacturing apparatus comprising: a rotary drive unit configured to rotate the table about a rotation axis in a circumferential direction; a region setting unit configured to set a plurality of divided regions obtained by dividing, in the circumferential direction, an irradiation region of the energy beam on a main surface of the table, the irradiation region corresponding to a cross section of the modeled object intersecting the rotation axis, wherein an area per unit central angle of one first divided region among the plurality of divided regions is smaller than an area per unit central angle of one second divided region among the plurality of divided regions; an irradiation unit that faces the main surface of the table and is configured to irradiate the powder material with the energy beam for each of the divided regions; and a rotation speed adjusting unit configured to adjust a rotation speed of the table so that a rotation speed of the table during a period of irradiating the one first divided region with the energy beam becomes faster than a rotation speed of the table during a period of irradiating the one second divided region with the energy beam.