摘要
以铝合金车体侧墙搅拌摩擦焊过程为研究对象,应用数值模拟技术开展焊接变形的研究及控制。基于分段温度函数法的高效计算方法,建立了该焊接结构三维有限元模型,得到结构焊后的变形分布,焊接变形呈马鞍状,结构面外变形约1.7 mm。为减小焊接变形,提出了三种不同焊接顺序和方向优化方案,并分别进行了数值模拟。结果表明,从中间向两边进行分段焊接可减小焊接变形50%,而单纯改变不同焊缝的焊接方向,对变形几乎没有影响。
This paper aim to the friction stir welding process for aluminum alloy car body side wall as the research object,applied tile simulation technnlogy to research and control the welding defnrmation. Efficient calculation method based on the method of piecewise function of temperature, the welding structure finite element model, the deformation distribution are obtained after welding, the welding deformation of the saddle,outside of the structure deformation is about 1.7mm. In order to decrease welding defnrmation,put forward three kinds of different welding sequence and direction of optimization solutinn,and the numerical simulation is performed. The results show thai, from the middle to both sides of subsection welding can reduce welding deformation of 50%, the welding direction and simple change of different weld, almost no impact on the deformation.
出处
《电焊机》
北大核心
2014年第4期78-82,共5页
Electric Welding Machine
关键词
焊接结构
搅拌摩擦焊
数值模拟
工艺优化
welded structure
friction stir welding
numerical simulation
process optimization
