Development of a multi-directional metal 3D printing system based on direct metal deposition

Shiming Gao, Wei Hsin Liao, Ping Guo*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Process parameters, including deposition direction, arecrucial in direct metal deposition (DMD) for microstructureformation and mechanical properties of the final part. Multidirectional deposition along with in-situ deposition control canminimize deposition anisotropy and improve dimensionalaccuracy. In this paper, a DMD system is developed to achievemulti-directional metal deposition by using 6 degree-of-freedom(DOF) motion of the workpiece platform rather the laser headfor a highly compact design. An in-situ control strategy with twoindependent loops of laser focus and power is developed tocontrol the printing process based on the feedback from real-timemelt pool geometry and intensity. Experimental results haveshown that the laser focus and power control can significantlyimprove geometrical accuracy and reduce heat accumulation. Inaddition, system kinematics are derived and verified for the 6-DOF hexapod to achieve multi-directional deposition. Obliquestructures have been successfully printed to demonstrate theeffect of optimized build direction.

Original languageEnglish (US)
Title of host publicationAdditive Manufacturing; Manufacturing Equipment and Systems; Bio and Sustainable Manufacturing
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791858745
DOIs
StatePublished - 2019
Externally publishedYes
EventASME 2019 14th International Manufacturing Science and Engineering Conference, MSEC 2019 - Erie, United States
Duration: Jun 10 2019Jun 14 2019

Publication series

NameASME 2019 14th International Manufacturing Science and Engineering Conference, MSEC 2019
Volume1

Conference

ConferenceASME 2019 14th International Manufacturing Science and Engineering Conference, MSEC 2019
CountryUnited States
CityErie
Period6/10/196/14/19

Keywords

  • Additive manufacturing
  • Direct metal deposition
  • Multi-directional deposition

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering

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