数控弯曲下TA18高强钛管回弹对壁厚减薄和截面畸变的影响

Effect of Springback on Wall Thinning and Section Distortion for High Strength TA18 Tube in NC Bending

摘要:

通过ABAQUS有限元显/隐式方法模拟研究了不同芯棒和压块参数下回弹对TA18高强钛管壁厚减薄及截面畸变的影响。结果表明：在不同的工艺参数下TA18高强钛管卸载回弹后，壁厚减薄率与回弹前的相对差均小于10%；但截面畸变率与回弹前的相对差除极个别测量点外，均大于35%，甚至超过60%，且回弹后截面畸变率稳定变形区的“平台”现象消失。

Abstract:

The influence of the springback in high strength TA18 tubes on the wall thinning and section distortion under different process parameters was investigated using ABAQUS Explicit/Standard finite element models. The results show that the wall thinning ratios after unloading-springback are less than 10% under different process parameters for high strength TA18 tubes, while the section distortion ratios after springback are more than 35%, even 60% except a few measured points. The "platform" of section distortion ratio at stable forming zone disappears after springback.