曲面件搭接接头搅拌摩擦焊温度场的数值模拟及参数优化
Numerical Simulation of Temperature Field and Optimization of Welding Parameters in Friction Stir Welding of Curved Structure Overlap Joint
张利国, 姬书得, 刘震磊, 高双胜
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作者单位：（沈阳航空航天大学 航空宇航学院，辽宁 沈阳 110034）
中文关键字：面件； 搅拌摩擦焊； 温度场；焊 接参数
英文关键字： curved structure; friction stir welding; temperature; welding parameters
中文摘要：采用点点之间连接的方法实现了曲面结构件的搅拌摩擦焊焊接热源模型的加载，研究了飞机中蒙皮与桁条结构的搅拌摩擦焊搭接接头温度场的动态变化过程。结果表明，随着焊接速度的减小、旋转速度的增加以及搅拌头压力的提高，搅拌摩擦焊过程中的温度峰值升高，焊缝区域的高温区域扩大。从提高材料流动性以及避免出现熔焊的角度，提出了搅拌摩擦焊焊接工艺参数的优化方案。
英文摘要：By the connection between adjacent points, the loading of welding heat resource model on the curved structure was realized. the change of temperature field of the stringer and skin structure in aircraft was studied. The results show that, with the decrease of transverse speed, the increase of rotational tool's speed and the increase of rotational tool's press, the peak value of temperature in the welding process increases and the high temperature region in weld enlarges. From the view of increasing the material flow property and avoiding the material fusion, the optimization scheme of welding parameters of friction stir welding is put forward.