Equilateral double cone frustums shell with restrained ends is adopted to avoid the occurrence of buckling at the equatorial ring weld when it is bulged without restrained ends.

• 针对等边双圆锥台壳体在自由胀形过程中,赤道环焊缝处产生失稳起皱现象,提出了壳体的内约束胀形工艺,实验证明,壳体端部加约束后成形过程中没有起皱现象发