公开(公告)号：US10272516B2

公开(公告)日：2019-04-30

申请号：US15120643

申请日：2015-12-07

Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING

Inventor： Kazuya Goto

IPC: B22F3/105 ,  B23K15/00 ,  B23K15/02 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/153 ,  B29C64/268 ,  B29C64/393

Abstract: Overheating of and unintended melting of powder is suppressed, and thus the shaping accuracy is improved. A three-dimensional shaping apparatus includes an electron gun that generates an electron beam, at least one primary deflector that deflects the electron beam one- or two-dimensionally, at least one lens that is provided between the electron gun and the primary deflector and focuses the electron beam, a secondary deflector that is provided between the electron gun and the primary deflector, and deflects the electron beam one- or two-dimensionally, and a controller that controls the deflection directions and scanning speeds of the primary deflector and the second deflector. The controller controls the deflection direction and scanning speed of the second deflector while the scanning speed of the primary deflector is lower than a predetermined speed.

公开(公告)号：US10566171B2

公开(公告)日：2020-02-18

申请号：US15123350

申请日：2016-03-25

Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING

Inventor： Zhixiong Yuan ,  Kazuya Goto ,  Toshiyuki Morimura ,  Takahiro Shimbo

IPC: H01J37/147 ,  B23K15/00 ,  H01J37/302 ,  B33Y30/00 ,  B22F3/105 ,  H01J37/21 ,  B33Y10/00 ,  B33Y50/02 ,  B29C64/153 ,  B29C64/393 ,  B29C64/268 ,  B29C64/205 ,  B23K15/02 ,  H01J37/10 ,  H01J37/305 ,  G21K1/08 ,  B29C64/10 ,  B29C64/20

Abstract: This invention can maintain the temperature of the shaping plane in a three-dimensional layer-by-layer shaping apparatus. A three-dimensional layer-by-layer shaping apparatus includes a material spreader that spreads the material or materials of a three-dimensional layer-by-layer shaped object onto the shaping plane on which the three-dimensional layer-by-layer shaped object is to be shaped; an electron gun that generates an electron beam; at least one deflector that deflects the electron beam so that it scans the shaping plane one- or two-dimensionally; at least one lens that is positioned between the electron gun and the deflector, and focuses the electron beam; a focus controller that controls the focus of the electron beam based on which region is to be scanned by the electron beam; and a controller that controls the deflecting direction of the deflector and the scanning rate.

公开(公告)号：US10166628B2

公开(公告)日：2019-01-01

申请号：US14763144

申请日：2014-12-26

Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING

Inventor： Kazuya Goto

IPC: B23K15/02 ,  B33Y30/00 ,  B33Y50/02 ,  B22F3/105 ,  B23K15/00 ,  H01J37/302 ,  H01J37/305

Abstract: Even a region where powder is melted is scanned by an electron beam at the highest speed. A three-dimensional shaping apparatus includes an electron gun that generates an electron beam, at least one first deflector that deflects the electron beam one-dimensionally or two-dimensionally, at least one lens that is provided between the electron gun and the first deflector and focuses the electron beam, and a second deflector that is provided between the electron gun and the first deflector and deflects the electron beam one-dimensionally or two-dimensionally.