带筋管充液压形实验研究

为探讨带筋管整体成形的可行性,通过实验方法初步探讨了带筋管整体成形的力学条件及关键影响因素。实验结果表明,在消除筋板内环的径向、轴向和环向自由度后,充液压形工艺可实现带筋管的整体成形;采用充液压形工艺可以成形出高径比为5,径厚比为42.5的带筋椭圆紫铜管件。单自由度影响实验表明,侧翻和起皱是带筋管充液压形的两类典型缺陷,消除轴向自由度,可抑制侧翻缺陷的发生,消除环向自由度同时保持环向拉应力状态,有助于消除起皱缺陷。

Hydro-assisted Forming for Stiffened Tube with Ultra-ratio of Radius to Thickness

To explore the practicality of whole forming for stiffened tube, hydro-assisted forming is carried out. The mechanical boundary conditions and the key parameters are also explored. Experiment results illustrate it is possible for stiffened tube whole forming under hydro-assisted. The main mechanical boundary conditions are removing all degrees of freedom of the inner side of rib. A stiffened tube with elliptic cross section is formed successfully, whose ratio of height to inner radius and inner radius to thickness reach to 5 and 42. 5 respectively. Wrinkling and collapse are two typical defects during hydro-assisted forming. It is useful to eliminate axial degree of freedom for preventing collapse defect. Eliminating hoop degree of freedom is help to prevent wrinkling.