複数熱源による溶接変形特性に関する熱伝導論的検討 : 複数熱源を用いた温度場制御による溶接変形制御手法に関する研究(第1報) [in Japanese] Thermal Conductivity Theoretical Examination Concerning Characteristics of Welding Distortion Produced by Multiple Heat Sources : Studies on Welding Distortion Control by Temperature Distribution Control Using Multiple Heat Sources (Report 1) [in Japanese]
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It is well known that angular distortion in conventional welding has been predicted by heat input parameter proposed by Satoh and Terasaki, however, it is also well known that angular distortion in new welding process such as Tandem Arc welding has not always been predicted by conventional heat input parameter. Thus, welding distortion characteristics in multiple-heat-source welding have been investigated thermal conductivity theory and numerical simulation. First, an influence factor concerning angular distortion in multiple-heat-source welding has been extracted by thermal conductivity theory. As the result, the following factors are given as an influence factor for angular distortion in multiple-heat-source welding; heat input parameter, distance between two heat sources, heat input ratio, and welding speed. Based on them, the effect on angular distortion in multiple-heat-source welding has been evaluated by numerical simulation. In multiple-heat-source welding, angular distortion is possible to differ greatly by influence of distance between two heat sources or heat input ratio, even though heat input given to weld joint is equal. That is, multiple heat sources are appropriately arranged, then, angular distortion is expected to be able to be reduced effectively.
- Quarterly journal of the Japan Welding Society.
Quarterly journal of the Japan Welding Society. 24(4), 324-330, 2006-11-05
Japan Welding Society