铝合金双丝焊应力场的数值模拟

Numerical simulation of stress field for twin wire welding of al-alloy

通过对双丝焊电弧形态及熔滴过渡路径进行分析,发现双丝焊时前丝和后丝的电弧均向两丝中间偏转的现象。以此为基础,对双椭球形热源模型进行修正,提出了可用于双丝焊温度场计算的热源模型,并经过实际温度采样验证了该模型的准确性以此为基础,分析了2219铝合金双丝焊条件下纵向及横向应力的演变规律。

By analyzing the shape of twin wire welding arc and the track of droplets transfer, the phenomena that both fore arc and back arc deflect to the middle of the two arcs was found in the twin wire welding. Based on this, the double ellipsoid heat source model was modified, and a heat source model to calculate the twin wire welding temperature field was put forward. This model was testified by actual experiment of temperature sampling. Then, the evolution regularities of longitudinal and transverse stress for 2219 Al-alloy were investigated under the condition of twin wire welding.