NUMERICAL SIMULATION OF FORMING PROCESS OF HUMPING BEAD IN HIGH SPEED GMAW
NUMERICAL SIMULATION OF FORMING PROCESS OF HUMPING BEAD IN HIGH SPEED GMAW
复制标题
高速熔化极气体保护焊驼峰成形过程的数值模拟
DOI：
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复制
发表时间：
2009-09
期刊：
影响因子：
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通讯作者：
陈姬
中科院分区：
文献类型：
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作者：
武传松;陈姬
高速GMAW（熔化极气体保护焊）是提高焊接生产率的有效方法，但其应用通常因出现驼峰等焊道缺陷而受到限制。基于实验结果，通过考虑焊池中回流熔射流的动量和热含量，建立了数学模型来分析高速熔化极气体保护焊中驼峰焊道的形成机制。在熔池表面变形方程中加入一项与向后射流动量有关的项，过热熔滴的热含量分布在覆盖整个熔池的层内。对驼峰焊道的形成过程及其尺寸和3D几何形状进行了数值模拟，并与某些焊接条件下的实验测量进行了比较。结果表明，该模型能够定量描述和表征高速GMAW中的驼峰形成。关键词 焊接，高速熔化极气体保护焊，驼峰焊道，数值模拟
High speed GMAW (gas metal arc welding) is an effective way to improve the welding productivity, however, its application is usually limited by the occurrence of several weld bead defects, such as humping bead. Based on the experimental results, a mathematical model is developed to analyze the forming mechanism of humping bead for high speed GMAW through considering both the momentum and heat content of the backward flowing molten jet in weld pools. One term related to the momentum of backward jet is added to the equation of weld pool surface deformation, and the heat content of overheated droplets is distributed within the layer covering the whole pool. The humping bead forming process and its dimension and 3D geometry are numerically simulated, and compared with the experimental measurement under some welding conditions. It is found that the model can describe and characterize the humping formation in high speed GMAW quantitatively. KEY WORDS welding, high-speed GMAW, humping weld bead, numerical simulation
DOI：
10.1142/9781860945458_0002
发表时间：
2004-04
期刊：
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影响因子：
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作者：
T. Senba;Takashi Suzuki
通讯作者：
T. Senba;Takashi Suzuki
DOI：
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发表时间：
2010-09
期刊：
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影响因子：
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作者：
Chuansong Wu
通讯作者：
Chuansong Wu