Electromagnetic Vibration Monitoring Method for Liquid Transfer Mode in Wire Feeding Based Laser Additive Manufacturing(WFLAM)

doi:10.3901/JME.2018.02.034

Abstract

Abstract: An electromagnetic vibration (EMV) method is proposed to monitor the molten drop transition form of the fusing wire (1-2 mm) during Laser Additive Manufacturing (LAM). The theoretic and mathematical model of monitoring system is established and the new prototype device is developed. Two different kinds of wire (magnetic and nonmagnetic fine welding wires) are respectively utilized to test and verify the ability of the vibration excitation and signal collection of the monitoring system. The experimental results show that the proposed EMV method is available. Based on the developed device, the relations is investigated between the molten drop transition form of fusing wire and the strength difference of the vibration excitation signal and environmental noise signal. The results show that the strength difference of the vibration excitation signal is lower than that of the environmental noise signal (about -70 dB) in droplet transition form while the former (about -67-62 dB) is stronger than the latter in liquid bridge transition. The present work is useful to monitor the molten drop transition form of fusing wire in LAM.

Key words: electromagnetic vibration monitoring method, laser fuse additive manufacturing, vibration signal, wire transfer mode

CLC Number:

TB54

HUANG Anguo, LIU Bo, ZHENG Zengchao, GUO Jiaqi, CHEN Yiyuan, PANG Shengyong. Electromagnetic Vibration Monitoring Method for Liquid Transfer Mode in Wire Feeding Based Laser Additive Manufacturing(WFLAM)[J]. Journal of Mechanical Engineering, 2018, 54(2): 34-40.

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