溶接による角変化に及ぼすストロングバツクの影響について

概要

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Generally, in the effect of Strong Back to the angular distortion, four factors as below mentioned are to be considerd. (1) Measure (thickness and size of Strong Back)(2) Type (3) Pitch (distance of Strong Back) (4) Initial constraining force In this experiment, by defining the measure and type and changing the pitch and initial constraining force systematically, the author investigated how these factors have an effect on the sense of beauty. As the result, the matters ascertained are to be enumerated as follows. (1) The pitch and initial constraining force of Strong Back have the close connection with the angular distorion. (2) In the removal of Strong Back after perfect cooling, the angular distortion increase almost equally along the welding bead. (3) The decrease percentage of angular distortion by back welding is that in the first pass is larger than in the second pass. (4) The allowable range of angular distortion on the sense of beauty for the gauge distance of 100 mm is considered to be 0.015 radian in maximum. (5) If the thickness of base metal, the measure and type of Strong Back and the shape of edge are same as those in this experiment, the result is to be applicable actually. (6) The load to be added to the Strong Back when welding was ascertained in quantity.
社団法人日本船舶海洋工学会の論文