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Effect of Weld Shrinkage on Root Gap Behavior during Butt Welding with Additional Cooling behind Weld Heat Source
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- OKANO Shigetaka
- Graduate School of Engineering, Osaka University
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- MOCHIZUKI Masahito
- Graduate School of Engineering, Osaka University
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- TOYODA Masao
- Graduate School of Engineering, Osaka University
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- UEYAMA Tomoyuki
- DAIHEN Corporation
Bibliographic Information
- Other Title
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- 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
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Description
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.
Journal
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- QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY
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QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 29 (2), 70-76, 2011
JAPAN WELDING SOCIETY
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Keywords
Details 詳細情報について
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- CRID
- 1390282679703772032
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- NII Article ID
- 10030150617
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- NII Book ID
- AN1005067X
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- ISSN
- 24348252
- 02884771
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- Text Lang
- ja
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- Article Type
- journal article
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed