论文部分内容阅读
为了探索板料增量拉深成形的特点和规律,设计了增量拉深成形轨迹,用Deform-3D模拟软件,对盒形件增量拉深过程进行了数值模拟,分析了凹模圆角半径和凸模进给速度对成形件质量的影响,获得了成形过程中的等效应力和等效应变;并设计了具有双向调节机构的增量拉深模,在Gleeble1500D热模拟试验机上进行了工艺试验验证。结果表明:凹模圆角半径R=1.5 mm、凸模进给速度v=2.5 mm.s-1时能获得高质量的成形件;盒形件的等效应力和应变随着变形程度的增加而增大,最大应力和最大厚度减薄发生在盒形件筒壁直段与凸模圆角相切的部位,此处为零件最易破裂部位。
In order to explore the characteristics and rules of incremental sheet metal forming, an incremental drawing forming trajectory was designed. Deform-3D simulation software was used to simulate the incremental drawing process of box-shaped pieces. Radius and punch feed rate on the quality of the forming part, the equivalent stress and equivalent strain in the forming process were obtained. An incremental drawing die with bi-directional adjusting mechanism was designed and tested on a Gleeble1500D thermal simulator Process test verification. The results show that when the radius of the die die is R = 1.5 mm and the punch feed rate is v = 2.5 mm.s-1, high-quality formed parts can be obtained. The equivalent stress and strain of box-shaped parts increase with the increase of deformation The increase, the maximum stress and the maximum thickness thinning occur in the straight section of the box-shaped cylinder wall and the convex part of the tangent, where the most vulnerable parts of the site.