管材多点成形过程中壁厚减薄的数值模拟  

Numerical simulation of wall thinning in the process of multi-point forming for tube

作　　者：刘启骞[1] 付文智[1] 李明哲[1] 陈志红[1,2] 柳雨红[3] 

机构地区：[1]吉林大学辊锻工艺研究所,长春130022 [2]长春工程学院机电工程学院,长春130012 [3]哈尔滨理工大学机械动力工程学院,哈尔滨150080

出　　处：《塑性工程学报》2011年第2期13-17,共5页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(50275063)

摘　　要：基于动态显式有限元ABAQUS/Explicit,建立了管材多点成形过程的三维有限元模型,模拟分析管壁厚度、曲率半径和管坯的材料参数对管件壁厚的影响规律。结果表明,管壁厚度的增加和曲率半径的增大,有助于控制管件壁厚减薄,但管壁厚度对壁厚减薄的影响不显著,而随着曲率半径的增大,壁厚减薄率变化比较明显;在管件的截面畸变发生前,壁厚减薄量增大较快;合理地选择材料,可以有效地预防管件破裂的产生。该研究结果对管材多点成形参数的确定,具有指导作用。Based on dynamic explicit FEM（ABAQUS/Explicit）,a 3-D FEM model of the process of multi-point forming for tube was built.The effect of wall thickness,curvature radius and material parameters on the thickness of tube was simulated and analyzed.It shows that increasing the wall thickness and the curvature radius is beneficial for controlling wall thinning of tube.The influence of wall thickness on the thickness of tube is not significant.As the curvature radius increases,the change of the rate of wall thinning is quite obvious.The wall thinning increases quite fast before the cross-section distortion of tube occurs.The rupture can be prevented effectively with a reasonable material selected.The results can play directory role for determining the parameters of multi-point forming of tube.

关 键 词：材料合成与加工工艺 管材成形 数值模拟 壁厚减薄 

分 类 号：TG386[金属学及工艺—金属压力加工]