알루미늄 MIG 용접에서 ARMA모형을 이용한 용적이행 분류 및 용접성평가

Abstract

With the concern on environmental pollutions like global warming, many studies are concentrated on the development of alternative source of energy, in order to reduce the consumption of coal which generates green-house gases. To replace the fossil fuel, liquified natural gas has noticed, and at the same time the demand of LNG carrier is increasing. Aluminium which is one of the materials of LNG storage tank has high thermal conductivity and thermal expansion, so it causes pore or crack in weld zone. Thus in this paper, butt welding type I on Al5083-O 3t was carried out with MIG welding. The experimentations was designed by orthogonal array, and complete joint penetration fullfilled with one pass in 3mm plates. The influence of heat input on tensile strength of weld zone was also analyzed by analysis of variance. The algorithm of real time monitoring system based on ARMA was suggested to not only assure the quality of weld zone but predict the metal transfer.