公开(公告)号：US20190118286A1

公开(公告)日：2019-04-25

申请号：US16121581

申请日：2018-09-04

Applicant: ADVANTEST CORPORATION

Inventor： Shinji SUGATANI ,  Shigeki NISHINA ,  Jun MATSUMOTO ,  Masahiro TAKIZAWA ,  Minoru SOMA ,  Akio YAMADA

IPC: B23K15/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B23K15/02

Abstract: Provided is a three-dimensional laminating and shaping apparatus 100 including a column unit 200 that is configured to output an electron beam EB and deflect the electron beam EB toward the front surface of a powder layer 32, an electron detector 72 that is configured to detect electrons that may be emitted in a predetermined direction from the front surface of the powder layer 32 when the powder layer 32 is irradiated with the electron beam EB, a melting judging unit 410 that is configured to generate a melting signal based on the strength of the detection signal from the electron detector 72, and a deflection controller 420 that is configured to receive the melting signal to determine the condition of the irradiation the electron beam.

公开(公告)号：US20190118287A1

公开(公告)日：2019-04-25

申请号：US16127225

申请日：2018-09-11

Applicant: ADVANTEST CORPORATION

Inventor： Shinji SUGATANI ,  Shigeki NISHINA ,  Jun MATSUMOTO ,  Masahiro TAKIZAWA ,  Minoru SOMA ,  Akio YAMADA

IPC: B23K15/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B28B1/00 ,  B28B17/00

Abstract: Provided is a three-dimensional laminating and shaping apparatus 100 including a column unit 200 that is configured to output an electron beam EB and deflect the electron beam EB toward the front surface of a powder layer 32, an insulating portion that electrically insulates a three-dimensional structure 36 from a ground potential member, an ammeter 73 that is configured to measure the current value indicative of the current flowing into the ground after passing through the three-dimensional structure 36, a melting judging unit 410 that is configured to detect that the powder layer 32 is melted based on the current value measured by the ammeter 73 and generate a melting signal, and a deflection controller 420 that is configured to receive the melting signal to determine the condition for the irradiation with the electron beam.