Generative Fertigungsverfahren und -Vorrichtung mit Erkennung von Defekten mittels Rückstreuelektronen

Details

Veröffentlichungs-Nr.

EP3789139

Aktenzeichen

EP20194892

Anmeldetag

7. September 2020

Veröffentlichung

15. März 2023

Erteilung

15. März 2023

Rechtsraum

EP

IPC

B22F10/364B22F10/37B22F12/90B29C64/393B33Y50/02G01N23/2206G01N23/2251B22F12/41B33Y30/00B33Y40/00

Abstract

In a squeegeeing step of the three-dimensional powder bed fusion additive manufacturing (PBF-AM) method, a powder sample is supplied onto a base plate to stack powder layers. In a main melting step, a powder bed which is a top layer of the powder layers is irradiated with an electron beam to melt a two-dimensional shape area, which is a single layer obtained by slicing a shaping model. In a shaping surface checking step, a backscattered electron that is generated when the melted area is irradiated with the electron beam is detected and, based on the backscattered electron, it is determined whether the melting state is normal or not. When it is determined in the shaping surface checking step that the melting state is not normal, a re-melting step is performed to re-irradiate the area melted in the main melting step with an electron beam generated by the beam generation unit.

Anmelder

Firmen

JEOL Ltd.
Jeol Ltd.

Land

🇯🇵 Japan

Fachgebiete