基于焊接专用数值分析软件模拟电动自行车铝合金车架前管和连接管的钨极惰性气体保护焊接（GTAW）过程，分析了焊接变形的形成和残余变形分布。结果表明：在固定约束条件下，焊接过程的局部不均匀热输入是引起焊接变形的主要原因；在焊接和冷却过程中，焊接变形一直增大；室温状态时，最大残余变形量为0.530573 mm，主要位于前管左端位置。
The welding process of GTAW welded aluminum alloy electric bicycle frame was numerically simulated by using special welding finite element analysis software. Furthermore,the formation and distribution of welding residual deformation were also analyzed. The results show that under the fixed constraint condition,the partially uneven heat input in welding is the main cause of welding deformation. In soldering and cooling process,welding distortion is always increasing. In room-temperature state,the maximum residual deformation amount is 0.530 573 mm,mainly located in the left end position of the front tube.
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