Analysis of droplet transfer of pulsed MIG welding based on electrical signal and high-speed photography

作者：Yao, Ping^*; Xue, Jiaxiang; Huang, Wenchao; Zhang, Rui

来源：China Welding, 2009, 18(1): 67-72.

• Droplet transfer
• Electrical signal
• High speed image
• Pulsed MIG welding
• Soft switching inverters
• Statistical datas
• Synchronous acquisition
• Welding parameters

In order to study how welding parameters affect welding quality and droplet transfer, a synchronous acquisition and analysis system is established to acquire and analyze electrical signal and instantaneous images of droplet transfer simultaneously, which is based on a self-developed soft-switching inverter. On the one hand, welding current and voltage signals are acquired and analyzed by a self-developed dynamic wavelet analyzer. On the other hand, images are filtered and optimized after they are captured by high-speed camera. The results show that instantaneous waveforms and statistical data of electrical signal contribute to make an overall assessment of welding quality, and that optimized high-speed images allow a visual and clear observation of droplet transfer process. The analysis of both waveforms and images leads to a further research on droplet transfer mechanism and provides a basis for precise control of droplet transfer.

• 出版日期2009-3
• 单位华南理工大学