Three-dimensional powder bed fusion additive manufacturing apparatus and three-dimensional powder bed fusion additive manufacturing method
US12103076B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2022 |
| Grant date | Oct 1, 2024 |
| Priority date | — |
| Expiry date | Dec 13, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.