Effects of Metal Vapor for Temperature Distribution of Transient Arc in Pulsed TIG Welding
Effects of Metal Vapor for Temperature Distribution of Transient Arc in Pulsed TIG Welding
复制标题
金属蒸气对脉冲TIG焊瞬态电弧温度分布的影响
DOI：
10.2207/qjjws.27.8s
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Manabu Tanaka
中科院分区：
文献类型：
--
作者：
Yusuke Mori;Toru Iwo;M. Yumoto;S. Tashiro;Manabu Tanaka
为了提高焊接质量和稳定性，采用了脉冲弧焊。然而，当焊接参数不当时，很容易产生焊接缺陷。电弧性能和能量平衡对TIG焊非常重要。然而，对瞬变电弧的理论解释还没有得到定量的描述。如本文所述，在考虑铁蒸气的情况下计算了温度分布，铁蒸气改变了电弧的能量平衡和阳极表面状况，作为电流的函数。因此，高温区的膨胀和收缩取决于Fe蒸气。在峰值电流期间，当Fe蒸气为污染物时，高温区的增长变慢。在基极电流期间，当Fe蒸气是污染物时，高温区迅速减小。辐射功率和电导率的增加改变了温度和轴向流动速度等性质。铁蒸气的影响取决于其分布，因为温度分布取决于电流波形。分析了电流波形与铁气相分布之间的关系。计算了峰值电流和基极电流的三个计算条件作为参数。在峰值电流期间，不同的电流波形，铁蒸气的分布不同。然而，在基本当前期间，它几乎是相同的。对于脉冲TIG焊，金属蒸气的分布是瞬时变化的，其对过渡电弧性能的影响也会发生变化。
Pulsed arc welding is used for improvement of welding quality and stability. However, welding defects readily occur when welding is used under inappropriate parameters. Properties of arc and energy balance are very important for TIG welding. However, the theoretical elucidation of a transient arc has not been described quantitatively. As described in this paper, the temperature distribution is calculated under consideration of Fe vapor, which changes the energy balance of the arc and anode surface condition as a function of current. Consequently, expansion and contraction of the high-temperature area depends on the Fe vapor. During the peak current period, the increment of the high-temperature area slows when Fe vapor is a contaminant. During the base current period, decrement of the high-temperature area occurs rapidly when Fe vapor is a contaminant. The increment of radiation power and electrical conductivity alters properties such as the temperature and the axial flow velocity. Effects of the Fe vapor depend on its distribution because the temperature distribution depends on the current waveform. The relation between the current waveform and Fe vapor distribution was assessed. Three calculation conditions of the peak and base current were calculated as parameters. During the peak current period, the Fe vapor distribution differs in the case of current waveform. However, it is almost identical during the base current period. For pulsed TIG welding, metal vapor distribution changes instantaneously; its effects for properties of transient arc change as well.