In GMAW welding used mostly at the scene of a welding industry, welders can not see control panels in internal welds of vehicles and tanks, and can not adjust the current and voltage properly during the welding, which is caused by distance from the working area. Therefore, welders have to move to control the current and voltage by stopping welding. This, however, can result in the welding defects by momentary cooling. In this research related to the existing GMAW welding methods and the manners with the remote control torch their performances were evaluated by comparing and analyzing the welds of V-type butt using SM50A 6 mm and welding structural rolled steels. As the result of conducting the visual inspection and bending test one by one against the V-type butt welds, the amount of spatter by the remote control torch method showed reducing effects about five times lower and it had a performance that did not affect the weld defects by displaying suitable effects on the bending test of welds. Consequently, the experimental study on the possibility of replacement and compatibility with the existing commercial welder for the remote control torch was performed.

Abstract
 1. Introduction
 2. Experiment Device and Method
  2.1 Welding device
  2.2 Materials and filler metal
  2.3 Experimental method
  2.4 Visual inspection on the welds
  2.5 Bending test
 3. Experimental Results and Consideration
  3.1 Visual inspection on the spatter by the change of the welding current and voltage
  3.2 Bending test of the surface with V-type butt welding
 4. Conclusion
 References

• 김정혁(군장대학교 조선해양계열학과) | Jeong-Hyeok Kim
• 오석형(군산대학교 기계자동차공학부) | Seok-Hyeong Oh
• 양현수(군장대학교 조선해양계열학과) | Hyun-Soo Yang