Patent ID: 11911838
Assignee: PRO-BEAM GMBH & CO. KGAA
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 11:
12. An electron beam installation, which is used for selective melting of powdered material to form a 3D structure, comprising:
a powder container, which can accommodate a powder bed made of the powdered material to be selectively fused;
an electron beam generator, which is configured to direct an electron beam onto laterally differing locations of the powder bed to selectively fuse the powdered material; and
a coherer device which is configured to apply an AC voltage between at least two electrodes to generate an electromagnetic alternating field, which bonds the powdered material of the powder bed, at least in regions over the powder bed, before the selective fusion with the electron beam generator, wherein the frequencies at which the AC voltage of the coherer device is operated are greater than 5 kHz.