二, 三の溶接アーク現象とガスシールド条件 : ガスシールドアーク溶接における耐風効果に関する研究(第 4 報)

概要

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This paper is a part of a study on the wind resistance in a gas shielded arc welding. In this paper, we show the effect of the gas shielding conditions against the wind on the welding arc phenomena with a short circuiting arc welding. The results obtained are summarized as follows : (1) The short circuit frequency of A type is increased about 30(%) but B type is almost unchanged in deficient shielding conditions. (2) The short circuit frequency is distributed the range of 0-15×3^<-3>(sec) in short circuit time and the peak point of the distribution is 4×(10)^<-3>(sec) in sufficient shielding conditions. But the range of distribution becomes shorter and the peak point is changed to 6×(10)^<-3>(sec) in deficient conditions. (3) In dificient shielding conditions, the spatter weight ratio (W_n/W_<20>) increases about 6 times and the spatter seems to become smaller in grain size and to fade in brightness. (4) The frequency spectrum of the welding arc sound has a very wide range. The sound pressure level (SPL) increases about 4-5 dB) in deficient shielding conditions.
社団法人溶接学会の論文
1979-08-05