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J Weld Join > Volume 32(2); 2014 > Article
Journal of Welding and Joining 2014;32(2):148-154.
DOI: https://doi.org/10.5781/JWJ.2014.32.2.22    Published online May 14, 2014.
An Experimental Study on Optimizing for Tandem Gas Metal Arc Welding Process
Jongpyo Lee*, Illsoo Kim*, Jihye Lee*, Minho Park*, Youngsoo Kim*, Cheolkyun Park*
Correspondence:  Jongpyo Lee,
Email: jplee@mokpo.ac.kr
To enhance productivity and provide high quality production material in a GMA welding process, weld quality, productivity and cost reduction affects the number of process variables. In addition, a reliable welding process and conditions must be implemented to reduce weld structure failure. In various industries the welding process mathematical model is not fully formulated for the process parameter and on the welding conditions, therefore only partial variables can be predicted. The research investigates the interaction between the welding parameters (welding speed, distance between electrodes, and flow rate of shielding gas) and bead geometry for predicting the weld bead geometry (bead width, bead height). Taguchi techniques are applied to bead shape to develope curve equation for predicting the optimized process parameters and quality characteristics by analyzing the S/N ratio. The experimental results and measured error is within the range of 10% presenting satisfactory accuracy. The curve equation was developed in such a way that you can predict the bead geometry of constructed machinery that can be used for making tandem welding process.
Key Words: GMA welding, Mathematical model, S/N ratio, Taguchi techniques, Tandem welding

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