摘要
旋轮是大型变壁厚椭圆封头强力旋压加工过程中的关键工艺装备之一,对封头零件的成形精度和成形质量起着至关重要的作用。研究旋轮参数对成形过程的影响,可为相关成形参数的确定和优化设计提供理论依据。文章基于ABAQUS/Explicit建立的三维有限元模型,获得了旋轮进给比、旋轮圆角半径和旋轮安装角对该成形过程中的不贴模度、圆度及壁厚的影响规律。结果表明,增大旋轮进给比、选择合适的旋轮圆角半径或旋轮安装角,有利于封头的不贴模度和圆度的改善;减小旋轮进给比、减小旋轮圆角半径、增加旋轮安装角,均可改善凸缘变形状态,甚至可以消除扩径及材料隆起等缺陷,从而使封头壁厚分布更加均匀。
Roller plays an important role in power spinning of large ellipsoidal heads with variable thickness. A 3D-FE model was developed. The influences of roller parameters including roller feed rate, roller nose radius and roller oblique angle on the process were investigated. The results show that： the increase of roller feed rate, the selection of appropriate roller nose radius and roller oblique angle may improve the closefitting of the part with the die and the roundness of the head; the decrease of roller feed rate and roller nose radius, also the increase of roller oblique angle may improve the deforming state of the flange and even eliminate such defects, as diameter enlarging and material bulging to have the wall thickness of the head being more homogeneous. The investigations on influences of roller parameters on the forming process may lay a foundation for determining the forming parameters and optimizing the technological design.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2011年第2期114-119,共6页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(50405039
50575186)
国家"863"计划资助项目(2008AA04Z122)
关键词
旋轮参数
大型变壁厚椭圆封头
强力旋压
三维有限元模型
roller parameters
large ellipsoidal heads with variable thickness
power spinning
3D FE model
