根据小孔等离子弧焊接的工艺特点，考虑等离子弧对熔池的“挖掘”作用，提出了一种新的焊接热源模型（TPAW），以描述和反映等离子弧作用下“倒喇叭”状焊缝横断面的特点以及等离子弧热流沿工件厚度方向的分布。在此基础上，对小孔等离子弧焊接热场进行了有限元计算，分析了引弧后熔池及周围温度场的瞬时演变过程。计算出的小孔等离子弧焊缝形状与试验结果基本吻合，达到准稳态的时间与试验测试值一致。
With considering the characteristics of keyhole plasma arc welding and the plasma’s “digging” action to the weld pool, a new welding heat source model (TPAW) is proposed to describe and reflect the “reversed bugle” configuration of weld cross section under plasma’s action and the heat intensity distribution along the workpiece thickness direction. Based on TPAW, finite element calculation of temperature field in keyhole plasma arc welding is conducted, and the transient development of weld pool and surrounding thermal profiles are analyzed. The predicted weld geometry and the time needed to reach the quasi-steady state are in agreement with experimental measurements.
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| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] | |
| [11] | |
| [12] | |
| [13] | |
| [14] | |
| [15] |
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