Stability Analysis of Jet Deposition in Metal Melt Direct Writing Process

doi:10.3901/JME.2024.01.119

Abstract

Abstract: Metal material additive manufacturing has the advantages of a short process and flexible design, which can meet the individual needs of complex structural parts in small batches. Compared with other metal additive manufacturing processes，molten-metal-direct writing (MMDW) has the advantages of low equipment cost and high efficiency. The stability of jet is the key influence factor of MMDW forming quality and accuracy. Four state models of jet flow: droplet flow, curved flow, smooth flow, and fluctuating flow, have been established. The numerical simulation method is used to study the morphological evolution process in the jet process. A revised equation of jet continuous length is obtained. The causes and development laws of jets in different states are revealed. The single track writing process experiments are carried out, and the ranges of substrate velocity under different jet states for uniform track writing are obtained. A reference basis for precise control of shape and performance of MMDW process has been provided.

Key words: metal additive manufacturing, molten-metal-direct writing forming, metal jet, jet stability

CLC Number:

TG156

RONG Wenjuan, SHAN Zhongde, WANG Baoyu, WANG Jialin, WANG Yongwei. Stability Analysis of Jet Deposition in Metal Melt Direct Writing Process[J]. Journal of Mechanical Engineering, 2024, 60(1): 119-126.

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