描述了对经“削角处理”的足球状封闭壳体进行无模液压胀球的实验过程,测量了在内压增大过程中壳体各典型部位的应变数值,得出了厚度变化规律。使用非线性商用有限元软件ADINA对成形过程进行了数值模拟,厚度变化趋势与实测数据一致。结果表明,六边形先变形并且变形量大,五边形后变形并且变形量小。此外,还讨论了胀形前壳体的结构对胀形后球壳的圆度影响。 The experimental process of die-free hydrostatic expansion of a football-like closed shell with “chamfered” was described. The strain values ​​of various typical parts of the shell during the increase of internal pressure were measured, and the thickness variation law. The non-linear commercial finite element software ADINA was used to simulate the forming process. The trend of thickness variation was consistent with the measured data. The results show that the hexagons deform first and the deformations are large, the pentagons deform and the deformations are small. In addition, the influence of the structure of the front shell body on the roundness of the spherical shell after bulging is also discussed.