Abstract: In order to explore the accuracy of the existing wrinkle evaluation method for the prediction of the wrinkling of the thin-walled spherical members, the first-pass conventional spinning of the 2024-O aluminum alloy spherical thin-walled member is taken as the research object, and the test method is used to determine the occurrence of the 2024-O aluminum alloy spinning flange wrinkle, combined with the numerical simulation method, which obtains the results of the wrinkling occurrence of the 2024-O aluminum alloy spinning flange based on the existing wrinkle evaluation methods. The results show that the flange geometry wave method and the model based on plastic instability theory can correctly predict the moment when the flange wrinkles occur, and the former method’s prediction error is 12.5% and the latter is 7.7%. The spin pressure method can predict the moment of serious wrinkles, but cannot quantitatively predict the occurrence time of wrinkles. The elastic strain energy oscillation method cannot predict the above two wrinkling problems.

Key words: thin-walled spherical members, aluminum alloy, spinning forming, flange wrinkle, wrinkling prediction