熱源後方に冷却を伴う突合せ溶接中に生じる面内回転変形に及ぼす収縮変形の影響 Effect of Weld Shrinkage on Root Gap Behavior during Butt Welding with Additional Cooling behind Weld Heat Source

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It has been broadly accepted that root gap during welding continues to open in case of butt-welding without restraints. So, the restraints, such as strong back and tack weld, are essential countermeasures to prevent root gap from opening. In order to improve manufacturing sufficiency, active control of root gap behavior during welding even becomes significant. In this study, the root gap behavior during in-process control welding by additional cooling is discussed based on measurement experiments and numerical analyses. As the results, the root gap behavior during butt-welding is possible to be considerably affected by temperature distribution during in-process control welding. The cooling position and cooling intensity of controllable factors in additional cooling method have a significant influence on the root gap behavior during welding. In addition, the root gap can be closed due to rapidly cooled temperature distribution by additional cooling with appropriate cooling position. The appropriate cooling position is dependent on the mechanical melting length behind welding torch. It is significant to consider the effect of weld shrinkage during rapid cooling for closing of the root gap. It is concluded that root gap behavior during butt-welding can be controlled by the optimization of temperature distribution due to additional cooling.

収録刊行物

  • 溶接学会論文集 : quarterly journal of the Japan Welding Society

    溶接学会論文集 : quarterly journal of the Japan Welding Society 29(2), 70-76, 2011-12-31

    一般社団法人 溶接学会

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各種コード

  • NII論文ID(NAID)
    10030150617
  • NII書誌ID(NCID)
    AN1005067X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    02884771
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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