基于ANSYS的筒形件强力反旋应力应变分析

Stress and Strain Analysis of Tube Backward Spinning Based on ANSYS

为了确定更为符合实际的筒形件三旋轮强力反旋工艺参数的选用原则,利用大型非线性有限元软件ANSYS/LS-DYNA对不同工艺参数下筒形件三旋轮强力反旋旋压过程进行了动态模拟和应力应变分析。分析结果表明:减薄率为10%~20%时,旋压效率极低,减薄率应取30%~40%;旋轮进给量在1mm/r^2.5mm/r范围内变化时,其应力和应变变化不大,比较稳定;旋轮圆角半径在一倍至两倍毛坯厚度之间较为合适;旋轮成形角以取20°~25°为最佳;旋轮直径对应力影响较小;随着毛坯内径的增大,应力基本保持不变,应变基本呈减小趋势。

In order to obtain actual preferred principle of processing parameter about three-roller backward spinning of tube, nonlinear FEA software ANSYS/LS-DYNA is, carried on 3D dynamic simulation, stress analysis and strain analysis to three-roller backward spinning of tube under different processing parameter. Analysis results indicate ： when the reducer ratio takes 10%～20%, the efficiency of spinning is very low, so the reducer ratio should take 30%～40% ; when feeds of spinning roller take lmm/r～ 2.5mm/r, variety of stress and strain is very small; thus the roller working radius should take once to twice blank thickness; roller forming angle should take 20°～25°; roller diameter have smaller influence to stress ; with the increase of blank inner diameter, stress approximately remains invariant, and strain appears reducing trend.