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Journal of KWJS 2007;25(5):44-52.
Published online January 28, 2008.
Development of Multi-pass Welding Method for Lifting Lug by Robot Weaving
Young-Zoo Kim, Kang-Uk Kim, Suk-Hyoung Kim, Sung-Won Kang, Soo-Ho Kim
  A welding process of a lifting lug for lifting heavy objects is one of the important welding processes directly related to the safety in shipbuilding. Welding a lifting lug is done in the manually and takes about forty minutes. Working environment for the lifting lug welding is very poor due to an radiant heat and a harmful fume. The purpose of this study is to develop methods of multi-pass welding using the lifting lug welding robot system. This study shows robot welding methods to achieve proper corner, straight and connection welding and an effectiveness of application.
Key Words: Shipbuilding industry, Flux cored arc welding, Welding robot system, Beveled both sides bevel joint fillet welds, Build-up concept, Multi-pass welding, Weld defects

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