The dependence of deformation inhomogeneity on the pulsed laser parameters in laser shock incremental forming (LSIF) of pure copper foil was studied based on finite element simulation. The formed depth, angle, profile and limiting fluctuation value were adopted to evaluate the forming deviation of parts. The digital microscope was employed to examine the bottom surface morphology of formed parts. The effect of pulsed laser energy, spot diameter and overlapping rate on the deformation inhomogeneity in LSIF was investigated. It is revealed that there are variances in the shape and dimension of formed parts along both the shock and travelling directions owing to the local loading history of LSIF. The formed depth and angle are different in various positions of formed parts along the shock direction, while the formed profile presents a periodic variation along the travelling direction. The appropriate enhancement of laser energy can improve the deformation inhomogeneity along both the shock and travelling directions. The deformation profiles along the shock and travelling directions depend on the adopted spot diameter. The rebound effect may occur while too small spot diameter is employed, resulting in the degradation of forming accuracy. The overlapping rate has a major impact on the surface morphology of formed parts. As the overlapping rate increases to 80%, the limiting fluctuation values along the travelling direction become large due to the distortion at the free end. Under the given process conditions, the laser energy of 1100 mJ, the spot diameter of 2.5 mm and the overlapping rate of 60% are recommended to achieve straight-line channels with high forming quality.

在有限元模拟的基础上，研究了纯铜箔激光激增成形中变形不均匀性对脉冲激光参数的影响。采用成形深度，角度，轮廓和极限波动值来评估零件的成形偏差。用数字显微镜检查成形零件的底表面形态。研究了脉冲激光能量，光斑直径和重叠率对LSIF变形不均匀性的影响。结果表明，由于LSIF的局部加载历史，成形零件的形状和尺寸沿冲击方向和行进方向均存在差异。沿冲击方向，在成形零件的各个位置，成形深度和角度不同，而形成的轮廓呈现出沿行进方向的周期性变化。适当增加激光能量可以改善沿冲击方向和传播方向的变形不均匀性。沿冲击方向和行进方向的变形轮廓取决于所采用的光斑直径。当使用过小的光斑直径时，可能会发生回弹效应，从而导致成形精度下降。重叠率对成型零件的表面形态有重大影响。随着重叠率增加到80％，沿行进方向的极限波动值由于自由端的变形而变大。在给定的工艺条件下，激光能量为1100 mJ，光斑直径为2。