筒形件强力反旋的数值模拟及旋压力分析

Numerical Simulation and Spinning Force Analysis on Backward Spinning of Tube

以大型非线性有限元软件ANSYS/LS-DYNA为分析平台,通过对18种几何尺寸和参数不同的筒形件三旋轮强力反旋旋压过程的三维动态模拟,得到了它们的旋压力以及旋压力随不同减薄率,旋轮进给量,旋轮圆角半径,旋轮成形角,旋轮直径和毛坯内径的变化曲线。分析结果表明:随着减薄率、旋轮进给量、旋轮圆角半径的增加,旋压力各分力基本呈上升趋势。随着旋轮成形角、旋轮直径和毛坯内径的增加,旋压力各分力均呈非线性变化,但变化均不大。总之,减薄率、旋轮进给量、旋轮圆角半径对旋压力的影响较明显,而旋轮成形角、旋轮直径和毛坯内径对旋压力的影响较小。另外,随着上述各影响因素的变化,旋压力的轴向分力、切向分力与径向分力的比值基本保持不变。

In this paper, based on nonlinear FEA software ANSYS/LS-DYNA, 3D dynamic simulation models of eighteen-type tubes for backward spinning was established. This paper not only obtained spinning force of tube back- ward spinning but also obtained the spinning force curves varying with the different reducer ratio, feeds, fillet radius for spinning roller, forming angle and diameter of spinning roller, and diameter blank inner. Analysis results indicate： wlfh increasing the reducer ratio, feeds and fillet radius of spinning roller, the component forces of spinning force pres- ents the upward-trend. With increasing the forming angle and ciameter of opinning roller and diameter blank innes, the component forces of spinning force presents small nonlinear variation. In a word, the reducer ratio, feeds and fillet ra- dirs of spinning roller have a larger impact on spinning force, however forming amgle and diameter of spinning roller, and diameter of bland inner have a smaller impact on spinning force. Ohterwise, the ratioes between axial force and ra- dial force of spinning force approximately remain constant, also the ratloes between tangential force and radial force of spinning force approximately remain too.