Product Code: ICAL05_P520

The Effect of Process Parameters on the Gap Bridging Capability for CO2 Laser-GMA Hybrid Welding
Authors:
Hyunbyung Chae, Korea Institute of Industrial Technology; Incheon Korea
Cheolhee Kim, Korea Institute of Industrial Technology; Incheon Korea
Jeonghan Kim, Korea Institute of Industrial Technology; Incheon Korea
Sehun Rhee, Hanyang University; Seoul Korea
Presented at ICALEO 2005

For laser welding in shipbuilding industry, gap bridging capability is one of the most important characteristics to achieve the high productivity and good weld quality. Recently, laser-GMA hybrid welding process is receiving a spotlight as a distinctive method to overcome the tight gap tolerance with improving the productivity. Many researchers have investigated the phenomena of hybrid welding and tried to apply in various joint types in industrial sites. However, trials to overcome the problem of gap tolerance have still been in progress. The main purpose of this study was to optimize the process parameters such as wire feed rate, voltage, CTWD, and wire diameters in constant voltage mode. The thickness and type of the base metal used was 8mm, A grade mild steel and the filler metal used was ER70S-G. The results would be utilized for the adaptive control of the process parameters for gap variation.