Experiment study of powder flow feed behavior of laser solid forming

Hua Tan, Fengying Zhang, Rujun Wen, Jing Chen, Weidong Huang

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

A photographic system for the powder feed process of laser solid forming (LSF) was developed using a high speed camera, and the powder feed behaviors (the particle speed and the powder flow concentration) were described based on the powder flow images. The influences of the powder feed parameters and the distance below the nozzle exit plane on the powder feed behaviors were discussed, and the influences of the powder feed behaviors on the deposited layer quality were also investigated. It can be seen that the smooth finish of the deposited layer surface was improved remarkably by increasing the particle speed, and the deposited layer height decreases with the increase of the particle speed. It can also be found that the variation of the deposited layer height with the increase of the distance between the deposited surface and the nozzle exit plane is similar to that of the powder mass concentrations on the vertical symmetry axis.

Original languageEnglish
Pages (from-to)391-398
Number of pages8
JournalOptics and Lasers in Engineering
Volume50
Issue number3
DOIs
StatePublished - Mar 2012

Keywords

  • Deposited layer quality
  • Feed behavior
  • Laser solid forming
  • Powder flow

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