Pulsating tube hydroforming with axial feeding is an effective method to improve the forming performance of thin-walled tube. A beneficial wrinkle can make the tube wall thickness more uniform and create a greater bulging height during forming process. The method of expressing the degree of wrinkle with geometrical and mechanical criteria is applied to distinguish the wrinkle types, and thus, the wrinkles can be divided into beneficial ones and harmful ones based on the deformation wrinkle features with different forming parameters. The wrinkling behavior in tube pulsating hydroforming with axial feeding was investigated in this article by experimental study, numerical simulation and theoretical analysis. The results showed that loading parameters had great influence on formability and wrinkling behaviors and that the beneficial wrinkles could be identified and used effectively by controlling the relation of wrinkling degree and forming parameters. Furthermore, the evolution processes of wrinkling behaviors in tube-bulging experiment were observed, the characteristics of wrinkling in every stage were analyzed and the relationship between wrinkling degree and forming parameters was established in the experiment.

轴向进给脉动管液压成形是提高薄壁管成形性能的有效方法。有利的褶皱可以使管壁厚度更均匀，并在成型过程中产生更大的凸出高度。运用几何和机械准则表达皱纹程度的方法来区分皱纹的类型，因此，根据具有不同成型参数的变形皱纹特征，可以将皱纹分为有益皱纹和有害皱纹。通过实验研究，数值模拟和理论分析，研究了轴向进给管脉动液压成形的起皱行为。结果表明，加载参数对可成形性和起皱行为有很大影响，通过控制起皱程度与成形参数之间的关系可以识别和有效利用有益的起皱。此外，观察了胀管实验中起皱行为的演变过程，分析了每个阶段起皱的特征，并建立了起皱程度与成形参数之间的关系。