CO_2アークスポット溶接の強度について

概要

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CO_2 arc spot welding, which is widely used in such as car body welding, is assumed to be also applicable to the thin plate ship structure. If CO_2 arc spot welding is applicable instead of fillet welding, it is expected to reduce welding distortion and improve welding works. However, design basis and experimental result to be available in application for ship structure seem not to be reported. Accordingly, authors carried out various kind of experimental study to obtain data for welding procedure and strength. As a result, authors can conclude as follows. (1) CO_2 arc spot welding was confirmed to be applicable sufficiently to the thin plate ship structure with plate thickness about 5mm, and data for welding procedure was summerized in actual use. (2) Tensile and shear strength of spot welded joint were confirmed to have enough strength more than required values by classification society. (3) Fatigue strength evaluated by nominal stress at spot welded joint was found to have higher strength than one at fillet welded joint. (4) The relation between pitch of welding spot and ultimate strength of built-up beam could be obtained.
社団法人日本船舶海洋工学会の論文
1983-08-24