Study on Longitudinal Shrinkage of Bead-On-Plate.

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  • ビードオンプレート溶接継手に生じる縦収縮に関する研究
  • ビードオン プレート ヨウセツ ツギテ ニ ショウジル タテ シュウシュク ニ カンスル ケンキュウ

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This paper deals with experimental data and a predictive method of the welding longitudinal shrinkage which is important in the development of the high accuracy production system of the large welding structures. The longitudinal shrinkage can be calculated from the inherent force, namely Tendon Force, which is related to the total of the inherent strain. First the method to measure the longitudinal shrinkage with the error less than 1/100 mm was invented and then the experimental values of the longitudinal shrinkage and the inherent strain were obtained under various welding conditions. Next, the theoretical equation was proposed to calculate the longitudinal shrinkage from the inherent strain. As the results, the validity of the theoretical equation combining the welding heat input with Tendon Force obtained from the inherent strain in the weld direction is proved. And, the possibility to predict the longitudinal shrinkage is shown by the comparison between longitudinal shrinkage values predicted from Tendon Force and experimental values.

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