Abstract
Directed energy deposition is an additive manufacturing process which produces deposits by irradiating laser beam on the baseplate and supplying material powder to the meltpool. Although the material powder is generally conveyed with carrier-gas flow, the powders diffuse and some of them do not reach to the meltpool. In order to suppress the waste of materials, the particle movement should be analyzed and modified not only from the viewpoint of deposition conditions but also the nozzle design. Against this background, this paper presents analytical and measurement results of powder distribution under the nozzle and proposes a nozzle design to reduce the waste of material powder based on a gas-solid multiphase-flow simulation. The experimental result of designed nozzle certainly shows high powder supply efficiency of 74.8%, whereas that of the conventional nozzle is 52.6%.
| Original language | English |
|---|---|
| Title of host publication | 6th CIRP Global Web Conference, CIRPe 2018 |
| Subtitle of host publication | Envisaging the Future Manufacturing, Design, Technologies and Systems in Innovation Era |
| Editors | Alessandro Simeone, Paolo C. Priarone |
| Publisher | Elsevier B.V. |
| Pages | 133-137 |
| Number of pages | 5 |
| Volume | 78 |
| ISBN (Electronic) | 9781510875692 |
| DOIs | |
| Publication status | Published - 2018 Jan 1 |
| Event | 6th CIRP Global Web Conference, CIRPe 2018 - Duration: 2018 Oct 23 → 2018 Oct 25 |
Other
| Other | 6th CIRP Global Web Conference, CIRPe 2018 |
|---|---|
| Period | 18/10/23 → 18/10/25 |
Keywords
- Additive manufacturing
- laser
- simulation
ASJC Scopus subject areas
- Control and Systems Engineering
- Industrial and Manufacturing Engineering