Jeol Ltd.

Joel Ltd.

Kozo Koiwa

Takashi Sato

Nari Tsutagawa

Yohei Daino

Masahiko Kawakami

Shinichi Kitamura

Yuhei Kaneko

Ayumu Miyakita

Taku Hisaki

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.

Three-dimensional powder bed fusion additive manufacturing apparatus and three-dimensional powder bed fusion additive manufacturing method

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.

Growing community of inventors

Tokyo, Japan

Kozo Koiwa