针对国产大型客机6056/6156铝合金机身壁板T型接头双侧激光同步焊接的表面成形缺陷，从焊缝成形、微观组织、接头性能等方面对焊接缺陷的补焊工艺进行系统研究。结果表明：采用双侧填丝补焊方法能够有效消除焊缝原始缺陷获得成形良好的接头；补焊焊缝中心的等轴晶粒明显细化，热影响区弥散分布的第二相粒子有所减少，接头软化现象更为明显；补焊接头平均横向和轴向拉伸强度分别为323.9 MPa和183.5 MPa，为原始接头的95.8%和89.8%；轴向拉伸断口表现为脆性与韧性混合断裂，横向拉伸断口呈现脆性断裂特征。

Contraposing the welding defects of double-sided laser beam welded 6056/6156 aluminum alloys T-joints for the aircraft panels, systematic research on the repair welding process is carried out from the weld appearance, microstructure, and mechanical properties. The results show that double-sided repair welding with filler wire can eliminate the welding defects of the original joints and obtain good weld appearance, and the equiaxial crystal grain refinement is obvious. The dispersively distributed second phase particles in the heat affected zone are reduced, which causes the joints softened more significantly. The transverse tensile strength and axial tensile strength of the double-sided repair joints with filler wire are 323.9 MPa and 183.5 MPa, being 95.8% and 89.8% of the original joints, respectively. Axial tensile fracture surface appears mixed modes of brittle and ductile fracture, and the transverse tensile fracture surface appears brittle fracture characteristics.