| 基于Surface Evolver的小电流CO2焊熔滴自由过渡的数值模拟 |
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| 引用本文： | 宋加强,肖珺,张广军,吴林.基于Surface Evolver的小电流CO2焊熔滴自由过渡的数值模拟[J].焊接学报,2013,34(5):75-78,98. |
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| 作者姓名： | 宋加强 肖珺 张广军 吴林 |
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| 作者单位： | 哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 为实现小电流CO2焊熔滴自由可控过渡,需对此条件下熔滴的受力状态和临界过渡尺寸及其影响因素进行研究.为此在主要考虑斑点电磁阻力、重力和表面张力的前提下,建立了基于Surface Evolver的CO2焊熔滴形态的数值模型,依据能量最小原理仿真获得了静力平衡状态下自由过渡熔滴的形态.进而重点研究了斑点电磁阻力对熔滴过渡临界尺寸的影响.结果表明,电流负脉冲可消除斑点阻力使熔滴由托起状态转为自然下垂,为下一步实现附加外力小电流的熔滴自由过渡提供了依据.
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| 关 键 词： | CO2焊 数值模拟 Surface Evolver软件 熔滴自由过渡 斑点电磁阻力 |
| 收稿时间： | 2012/4/17 0:00:00 |
Numerical simulation of free metal transfer of low current CO2 arc welding based on Surface Evolver |
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| SONG Jiaqiang,XIAO Jun,ZHANG Guangjun and WU Lin.Numerical simulation of free metal transfer of low current CO2 arc welding based on Surface Evolver[J].Transactions of The China Welding Institution,2013,34(5):75-78,98. |
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| Authors: | SONG Jiaqiang XIAO Jun ZHANG Guangjun and WU Lin |
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| Affiliation: | State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China,State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China,State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China and State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | The force and critical sizes of metal droplet should be investigated in order to realize controlling in the free metal transfer in the CO2 arc welding. Therefore,under the precondition of repulse force,gravity and surface tention,the numerical simulation model of free droplet of the CO2 arc welding based on Surface Evolver is established. The free metal transfer is analyzed according to the principle of the minimum energy of a system. In addition,the effect of repulse force on the metal transfer is investigated and the connection between welding current and critical sizes of the droplet is acquired preliminarily. The investigation lays the basis for controlling the free metal transfer under low current in the next step. |
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| Keywords: | CO2 arc welding numerical simulation Surface Evolver free metal transfer repulse force |
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