Optimization of Flux Cored Arc Welding (FCAW) on Erection Joint Block Welding using Mechanized Automatic Welding

The competition in the shipyard industry is becoming increasingly intense, where more efficient processes are required not only to compete in terms of cost but also in the quality of the final product. Welding is a critical process in ship construction, where the quality of weld joints significantly affects the safety and durability of the ship’s structure— especially in the welding of block joints (Erection Joint Block). Flux-Cored Arc Welding (FCAW) technology, besides improving productivity and reducing operational costs, enables the development of supporting technologies that reduce operator dependency and enhance the overall weld quality. Numerous studies have highlighted the influence of welding parameters such as current, voltage, and travel speed on joint quality, while the skill level of welders also has a significant impact on the quality of the weld. Given the large volume of welding tasks that must be completed simultaneously, the use of automated technologies such as Mechanized Automatic Welding (MOW) can be an effective solution.Therefore, this study aims to analyze the impact of technology and determine the optimization of FCAW welding on ship block joints using MOW technology. Experiments involved applying MOW in three flat position welding variants with alternatives: 100% welder, 100% MOW, and combinations of 80% MOW, 50% MOW, and 20% MOW. Experimental data were analyzed using the Analytical Hierarchy Process (AHP) with Expert Choice 11 to identify patterns and influences, followed by determining optimal alternatives and comprehensive solutions that meet the acceptance criteria for welding inspection. The results are expected to contribute significantly to the development of welding technology and enhance the competitiveness of the shipyard industry.