카고 크레인 붐 측판 용접 시 용접변형저감 방안에 대한 연구

Abstract

The purpose of this study is to propose a deformation reduction method by considering the side plate deformation for cargo crane boom. For this, the amount of deformation of welded specimens has been measured and compared, which fabricated under four kinds of welding conditions such as current applied welding process, additional cooling process, symmetric welding process and minimized heat input process. As a result of study, Among the four welding conditions, the minimum deformation occurred in the "welding condition 4" of a minimized heat input process, followed by the welding sequence symmetry method and the forced cooling method. And, For the deformation amount of a minimized heat input process, which is "welding condition 4", the strain reduction effect was about 34% compared to the existing mass production condition.