| Effects of distance between arc and heat sink on stress and distortion in DC-LSND welding technology |
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| 作者姓名： | 李菊 关桥 郭德伦 杜欲晓 孙永春 史摧武 |
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| 作者单位： | [1]Beijing Aeronautical Manufacturing Technology Research Institute, Beijing, 100024. [2]Beijing University of Technology, Beijing, 100022. |
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| 基金项目： | This work is supported by The Aeronautical Funds of China. |
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| 摘 要： | The characteristics of temperatures, stresses and strains fields have been studied numerically for a titanium alloy sheet welded with an improved gas tungsten arc welding method, in which a trailing spot heat sink is introduced to control the welding stress and distortion. The impinging jet model is employed to describe the internee heat transfer between the cooling media and the top suufuce of the workpiece. The influcnee of the distance between arc and heat sink is investigated. Results show that there is an ideal range of distance. Using the ideal distance, a low stress and no distortion welding structure can be derived.
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| 关 键 词： | 弧焊 热散应力 焊接技术 变形 |
Effects of distance between arc and heat sink on stress and distortion in DC-LSND welding technology |
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| Li Ju,Guan Qiao,Guo Delun,Du Yuxiao,Sun Yongchun,Shi Yaowu.Effects of distance between arc and heat sink on stress and distortion in DC-LSND welding technology[J].China Welding,2007,16(3):6-9. |
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| Authors: | Li Ju Guan Qiao Guo Delun Du Yuxiao Sun Yongchun Shi Yaowu |
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| Affiliation: | 1. Beijing Aeronautical Manufacturing Technology Research Institute,Beijing,100024
2. Beijing University of Technology,Beijing,100022 |
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| Abstract: | The characteristics of temperatures, stresses and strains fields have been studied numerically for a titanium alloy sheet welded with an improved gas tungsten arc welding method, in which a trailing spot heat sink is introduced to control the welding stress and distortion. The impinging jet model is employed to describe the internee heat transfer between the cooling media and the top suufuce of the workpiece. The influcnee of the distance between arc and heat sink is investigated. Results show that there is an ideal range of distance. Using the ideal distance, a low stress and no distortion welding structure can be derived. |
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| Keywords: | gas tungsten arc welding dynamically controlled low stress no distortion stress distortion finite element method titanium alloy |
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