About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
|
Process Development
|
Presentation Title |
Vibration-actuated Powder Dispensing for Directed Energy Deposition Systems |
Author(s) |
Andrew Greeley, Denis Cormier |
On-Site Speaker (Planned) |
Andrew Greeley |
Abstract Scope |
Directed energy deposition system users often face several challenges associated with conventional powder delivery systems. In addition to high cost of wasted powder, it can be difficult to determine the amount of material being deposited, as some dispensed powder is not captured in the melt pool. This work studies the effectiveness of a vibration-actuated powder dispensing system using a small capillary opening. With proper design, contact forces prevent the powder from being dispensed when no vibration is applied. Conversely, when vibration is applied, the contact forces are overcome and the powder is dispensed into the melt pool. This work combines discrete element modeling simulations with experimental results to investigate the effects of vibration parameters and capillary size on the mean and variance of output mass flow rate for 316L stainless steel powder. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |