采用气压胀形方法对构成夹层结构的TC4钛合金激光焊接芯板进行了超塑成形。实验结果表明,芯板焊缝位置不当时成形,会出现焊缝严重弯曲变形,降低承载能力。芯板合理划分后,有限元模拟结果显示,成形温度为920℃,最大进气压力为1.5MPa时,效率比较高,成形理想。 The TC4 titanium alloy laser welded core plate that made up the sandwich structure was superplastic formed by the method of bulging bulge. The experimental results show that when the core plate welding position is improperly formed, the weld will appear serious bending deformation and reduce the carrying capacity. After the core plate is divided properly, the results of finite element simulation show that the forming efficiency is high and the forming is ideal when the forming temperature is 920 ℃ and the maximum inlet pressure is 1.5MPa.