平板の突合せ溶接進行中におけるグループ間隙の変化について : 第 1 報熱源前方に拘束を有しない場合

概要

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This paper deals with the effect of welding conditions on changes of root gap during welding in case of butt weld joints without restraint like strong backs and tack welds ahead of the heat source. The calculations of changes of root gap during welding are carried out under various conditions of heat input and plate width by means of two dimensional finite element method supported by experimental results. The main conclusions obtained in this report are summarized as follows : (1) Root gap at heat source (Displacement at heat source (u_H)) opens as the heat source moves. (2) Displacement at heat source (u_H) is determined by heat input per unit plate thickness and unit weld length (q/vh), molten pool length lead from the mechanical point of view (l_M) and plate width (W). (3) Displacement at heat source (u_H) is approximately expressed by the following equation. u_H=A(l/lm)^m where m is determined by l_M and W, and A is determined by q/vh, l_M and W.
社団法人溶接学会の論文
1980-07-05