Numerical Analysis of Arc Plasma Behavior in Groove Welding with 3D TIG Arc Model
Numerical Analysis of Arc Plasma Behavior in Groove Welding with 3D TIG Arc Model
复制标题
使用 3D TIG 电弧模型对坡口焊接中电弧等离子体行为进行数值分析
DOI：
10.2207/qjjws.28.10
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Y. Hirata
中科院分区：
文献类型：
--
作者：
Y. Ogino;K. Nomura;Y. Hirata
随着计算机技术的飞速发展，电弧焊接过程的数值模型不断被提出和发展，人们对电弧焊接过程进行了理论研究。然而，大多数数值模型是二维轴对称模型，仅适用于平板上的静止电弧。应用于制造领域的实际焊接工艺是以各种接头几何形状进行的，焊接电弧在母材上移动。因此，它们应该是非轴对称现象，需要用三维模型来讨论。在这项研究中，在V型坡口焊接TIG电弧特性进行了数值研究，通过使用我们的三维数值模型。结果表明，槽型表面的热输入和电弧压力都与平板表面有显著差异。在槽中，热输入和电弧压力随TIG焊炬的位置和瞄准而敏感地变化。实验结果表明，TIG电弧热输入在坡口表面分布的计算结果是正确的。
Arc welding phenomena have been theoretically investigated by using various numerical models, which have been proposed and developed together with rapid progress of the computer technologies. However, most of the numerical models are two-dimensional axial symmetric model that are available only for stationary arc on the flat plate. Actual welding processes applied to manufacturing field are performed with various joint geometries and the welding arc moves on the base metal. Therefore, they should be non-axial symmetric phenomena and it is required to be discussed with three-dimensional model. In this research, TIG arc characteristics in V-groove welding are numerically investigated by using our three-dimensional numerical model. It is shown that both of heat input and arc pressure on the groove surface are significantly different from the flat plate surface. In the groove heat input and arc pressure are varied sensitively with location and aiming of the TIG torch. Experimental results show the validity of calculation results of TIG arc heat input distribution on the groove surface.