本文根据大型储水、油球罐的实际受力情况提出了不等厚度球罐的整体无模成形工艺，并通过实验获得了成功。本文对该工艺的可行性进行了实验探讨；对壳体的结构设计、材料选择、工艺参数、实验测试方法进行了研究；并对壳体的应变分布、胀形前后的壁厚分布及直径变化进行了测量。最后用有限元程序分析了实验壳体的成形过程，并对实验参数进行了优化，给出了模拟后的应变分布图。 In this paper, according to the actual situation of large storage tank and oil tank, the whole moldless forming process of spherical tank with different thickness is put forward, and the experiment is successful. In this paper, the feasibility of the process was discussed experimentally; the shell structure design, material selection, process parameters, experimental testing methods were studied; and the shell strain distribution, wall thickness distribution and diameter changes before and after bulging Measured. Finally, finite element program was used to analyze the forming process of the experimental shell, and the experimental parameters were optimized. The simulated strain distribution was given.