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公开(公告)号：US11878348B2
公开(公告)日：2024-01-23
申请号：US17690298
申请日：2022-03-09
申请人： JEOL Ltd.
发明人： Taku Hisaki , Shinichi Kitamura , Takashi Sato , Ayumu Miyakita , Kozo Koiwa , Yohei Daino , Masahiko Kawakami , Nari Tsutagawa
摘要： A three-dimensional powder bed fusion additive manufacturing apparatus includes a powder application device that includes a squeegee and applies a powder material to a build plate to form a powder layer, a camera that photographs a manufactured surface of the powder layer, and a determination unit that determines whether powder application failure of the powder material has occurred using an image photographed by the camera while or immediately after the squeegee passes through the manufactured surface.
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公开(公告)号：US20220297193A1
公开(公告)日：2022-09-22
申请号：US17693878
申请日：2022-03-14
申请人： JEOL Ltd.
发明人： Masahiko Kawakami , Shio En , Ayumu Miyakita , Yuhei Kaneko
摘要： 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.
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公开(公告)号：US20220288696A1
公开(公告)日：2022-09-15
申请号：US17690314
申请日：2022-03-09
申请人： JEOL Ltd.
发明人： Taku Hisaki , Shinichi Kitamura , Takashi Sato , Ayumu Miyakita , Kozo Koiwa , Yohei Daino , Masahiko Kawakami , Nari Tsutagawa
IPC分类号： B22F12/90 , B22F10/28 , B22F10/37 , B22F12/30 , B22F12/13 , B33Y10/00 , B33Y30/00 , B33Y50/02
摘要： A three-dimensional powder bed fusion additive manufacturing apparatus includes a determination unit that determines presence or absence of powder scattering in a second preheating step using at least a third image that is an image of a powder layer photographed by a camera after the second preheating step among a first image that is an image of the powder layer photographed by the camera after a first preheating step, a second image that is an image of the powder layer photographed by the camera after the powder application step, and the third image.
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公开(公告)号：US20230014614A1
公开(公告)日：2023-01-19
申请号：US17865632
申请日：2022-07-15
申请人： JEOL Ltd.
发明人： Nari Tsutagawa , Takashi Sato , Yohei Daino , Kozo Koiwa , Yuhei Kaneko , Masahiko Kawakami
IPC分类号： B22F10/362 , B22F12/41 , B22F12/49 , B22F12/50 , B22F10/28 , B22F10/366 , B33Y10/00 , B33Y30/00
摘要： 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.
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公开(公告)号：US12103076B2
公开(公告)日：2024-10-01
申请号：US17865632
申请日：2022-07-15
申请人： JEOL Ltd.
发明人： Nari Tsutagawa , Takashi Sato , Yohei Daino , Kozo Koiwa , Yuhei Kaneko , Masahiko Kawakami
IPC分类号： B22F10/362 , B22F10/28 , B22F10/366 , B22F12/41 , B22F12/49 , B22F12/50 , B33Y10/00 , B33Y30/00
CPC分类号： B22F10/362 , B22F10/28 , B22F10/366 , B22F12/41 , B22F12/49 , B22F12/50 , B33Y10/00 , B33Y30/00
摘要： 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.
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公开(公告)号：US20220288691A1
公开(公告)日：2022-09-15
申请号：US17690298
申请日：2022-03-09
申请人： JEOL Ltd.
发明人： Taku Hisaki , Shinichi Kitamura , Takashi Sato , Ayumu Miyakita , Kozo Koiwa , Yohei Daino , Masahiko Kawakami , Nari Tsutagawa
摘要： A three-dimensional powder bed fusion additive manufacturing apparatus includes a powder application device that includes a squeegee and applies a powder material to a build plate to form a powder layer, a camera that photographs a manufactured surface of the powder layer, and a determination unit that determines whether powder application failure of the powder material has occurred using an image photographed by the camera while or immediately after the squeegee passes through the manufactured surface.
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