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Analysis of unstable phenomenon of mental transfer process in pulsed MIG welding in hyperbaric environment
Pages: 9-12+19
Year: Issue:  3
Journal: Welding Technology

Keyword:  pulsed MIG weldinghyperbaric environmenthigh speed video systemdroplet transfer;
Abstract: Based on the high speed video system and electrical signals analyzing system, it was observaed and analyzed for the unstable phenomenon of droplet transfer of pulsed MIG welding in hyperbaric environment.Experiments had confirmed that the hyperbaric environment had negative effects on droplet transfer. The current and voltage waveform were confusion, the peak current was not stable and there was some instability phenomenon such as low voltage. The U-I figure was not concentrate and the edge lines was not clear, as the pressure was increased and the U-I figure showed diverging trends. The droplet transfer contained various form such as spray transfer, short circuit transfer and globular transfer, the droplet size and shapes were different. Studying on the unstable phenomena of droplet was helpful to the improvement of the welding technology in hyperbaric environment.
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