| 全熔透钨极惰性气体保护电弧焊熔池表面变形动态过程的数值分析 |
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| 引用本文： | 赵明,秦亚伟,孙永兴.全熔透钨极惰性气体保护电弧焊熔池表面变形动态过程的数值分析[J].机械工程学报,2010,46(4). |
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| 作者姓名： | 赵明 秦亚伟 孙永兴 |
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| 作者单位： | 中国石油大学机电工程学院,青岛,266555 |
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| 基金项目： | 国家自然科学基金资助项目(50475131) |
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| 摘 要： | 基于能量守恒和质量守恒原理,并依据能量最小化理论,推导出全熔透钨极惰性气体保护电弧焊(Gas tungsten arc welding,GTAW)熔池自由上、下表面变形的控制方程组,并探讨与文献给出的熔透熔池上、下表面变形控制方程组的异同,给出控制方程组中将熔池上表面变形和下表面变形耦合为一个统一整体的拉格朗日参数的求解方案。分别对GTAW焊接不锈钢和低碳钢薄板从引弧到熔透并达到准稳态的全过程中熔池上、下表面变形的动态演变进行预测和分析,从中提取出了可用于表征工件熔透与否的参数,为基于正面视觉检测的背面熔透智能控制提供了依据。
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| 关 键 词： | 熔池表面变形 拉格朗日参数 熔透控制 数值分析 |
Numerical Analysis of Dynamic Surface-deformation of Fully-penetrated Gas Tungsten Arc Welding Molten Pool |
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| ZHAO Ming,QIN Yawei,SUN Yongxing.Numerical Analysis of Dynamic Surface-deformation of Fully-penetrated Gas Tungsten Arc Welding Molten Pool[J].Chinese Journal of Mechanical Engineering,2010,46(4). |
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| Authors: | ZHAO Ming QIN Yawei SUN Yongxing |
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| Affiliation: | College of Mechanical & Electronic Engineering/a>;China University of Petroleum/a>;Qingdao 266555 |
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| Abstract: | Based on the principles of energy and mass conservation as well as energy minimization theory within a whole system of fully-penetrated gas tungsten arc welding(GTAW) molten pool,the governing equations are derived to describe the pool surface-deformation on both sides.The solution scheme for determining the Lagrange parameter is given for the coupled upper and bottom pool surface-deformation equations which are unified with a single Lagrange parameter.Through predicting and analyzing the dynamic variation ... |
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| Keywords: | Weld pool surface-deformation Lagrange parameter Penetration control Numerical analysis |
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