公开(公告)号：US20230014614A1

公开(公告)日：2023-01-19

申请号：US17865632

申请日：2022-07-15

Applicant: JEOL Ltd.

Inventor： Nari Tsutagawa ,  Takashi Sato ,  Yohei Daino ,  Kozo Koiwa ,  Yuhei Kaneko ,  Masahiko Kawakami

IPC: B22F10/362 ,  B22F12/41 ,  B22F12/49 ,  B22F12/50 ,  B22F10/28 ,  B22F10/366 ,  B33Y10/00 ,  B33Y30/00

Abstract: An apparatus includes 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. 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 at least one of a beam current and the beam size of the electron beam from the start of preheating to an end of preheating.

公开(公告)号：US20220297193A1

公开(公告)日：2022-09-22

申请号：US17693878

申请日：2022-03-14

Applicant: JEOL Ltd.

Inventor： Masahiko Kawakami ,  Shio En ,  Ayumu Miyakita ,  Yuhei Kaneko

IPC: B22F12/49 ,  B22F10/28 ,  B22F12/41 ,  B33Y10/00 ,  B33Y30/00 ,  B23K26/342 ,  B23K26/60

Abstract: A three-dimensional PBF-AM apparatus includes: a build plate on which a powder material is spread in layers; and a beam irradiation device which irradiates the powder material spread on the build plate with a beam. The beam irradiation device divides a build region of the powder material spread on the build plate into a plurality of lines and performs beam scanning to melt the powder material in the build region line by line, and performs dummy scanning to scan the beam in a state that does not cause melting of the powder material between an end of beam scanning of an M-th (M is a natural number) line and a start of beam scanning of an (M+1)th line.

公开(公告)号：US12103076B2

公开(公告)日：2024-10-01

申请号：US17865632

申请日：2022-07-15

Applicant: JEOL Ltd.

Inventor： Nari Tsutagawa ,  Takashi Sato ,  Yohei Daino ,  Kozo Koiwa ,  Yuhei Kaneko ,  Masahiko Kawakami

IPC: B22F10/362 ,  B22F10/28 ,  B22F10/366 ,  B22F12/41 ,  B22F12/49 ,  B22F12/50 ,  B33Y10/00 ,  B33Y30/00

CPC classification number: B22F10/362 ,  B22F10/28 ,  B22F10/366 ,  B22F12/41 ,  B22F12/49 ,  B22F12/50 ,  B33Y10/00 ,  B33Y30/00

Abstract: An apparatus includes 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. 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 at least one of a beam current and the beam size of the electron beam from the start of preheating to an end of preheating.