TY - GEN
T1 - Development of a multi-directional metal 3D printing system based on direct metal deposition
AU - Gao, Shiming
AU - Liao, Wei Hsin
AU - Guo, Ping
N1 - Funding Information:
This work has been supported by the Academic Equipment Grant from the Chinese University of Hong Kong, Hong Kong and the start-up fund from McCormick School of Engineering, Northwestern University, USA.
Publisher Copyright:
© ASME 2019 14th International Manufacturing Science and Engineering Conference. All rights reserved.
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
KW - Additive manufacturing
KW - Direct metal deposition
KW - Multi-directional deposition
UR - http://www.scopus.com/inward/record.url?scp=85076569892&partnerID=8YFLogxK
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U2 - 10.1115/MSEC2019-2930
DO - 10.1115/MSEC2019-2930
M3 - Conference contribution
AN - SCOPUS:85076569892
T3 - ASME 2019 14th International Manufacturing Science and Engineering Conference, MSEC 2019
BT - Additive Manufacturing; Manufacturing Equipment and Systems; Bio and Sustainable Manufacturing
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2019 14th International Manufacturing Science and Engineering Conference, MSEC 2019
Y2 - 10 June 2019 through 14 June 2019
ER -