A VIBRATION-ASSISTED POWDER DELIVERY SYSTEM FOR ADDITIVE MANUFACTURING - An experimental investigation -

Hao Wu, David Pritchet, Sarah Wolff, Jian Cao, Kornel Ehmann, Ping Zou*

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Although vibration-assisted powder delivery systems have been developed and studied in the literature, their characteristics and principles of operation are generally not well suited for powder-based additive manufacturing operations mainly because of their powder flows and deposition characteristics. In view of these, a new piezo-driven vibrator system was designed, and its performance metrics were experimentally assessed. The flow rate, one of the key parameters in these processes, was used to evaluate the system. Its sensitivity and dependence on powder particle size, piezo excitation frequency and amplitude, hopper volume, nozzle size, and humidity were assessed. The results, using 316 L stainless steel powders, have shown that the mass powder flow rate can be effectively controlled and that it is most prominently influenced by the piezo excitation frequency.

Original languageEnglish (US)
Article number101170
JournalAdditive Manufacturing
Volume34
DOIs
StatePublished - Aug 2020

Keywords

  • Additive Manufacturing
  • Directed Energy Deposition
  • Mass Powder Flow Rate
  • Powder Bed Fusion
  • Vibration-Assisted Powder Delivery

ASJC Scopus subject areas

  • Biomedical Engineering
  • Materials Science(all)
  • Engineering (miscellaneous)
  • Industrial and Manufacturing Engineering

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