摘要
利用DYNAFORM软件构建有限元模型,对1060铝板单道次渐进成形圆孔翻边进行了研究,分析了预制孔径大小对壁厚分布规律的影响。结果表明:预制孔径过小会导致翻边出现中部减薄区;增大预制孔径,壁厚呈线性变化区和均匀分布区,中部减薄现象消除;预制孔径较大时,翻边壁厚线性分布。探究了在5种板料厚度下,不同翻边孔径对应的临界预制孔径,以及临界预制孔径对应的翻边高度,并将翻边孔径和临界预制孔径以及临界预制孔径和翻边高度之间的关系拟合成参数化方程。发现增加板料厚度,临界预制孔径减小,翻边件的成形极限增大。
A finite element model was established by software DYNAFORM to study the hole-flanging in single pass incremental forming of 1060 aluminum sheet,and the influence of the size for pre-fabricated aperture on the distribution law of wall thickness was analyzed. The results show that a small size of pre-fabricated aperture results in the central thinning zone in the flange,and when the pre-fabricated aperture increases,the wall thickness presents linearly variation zone and evenly distributed zone to vanish the central thinning zone. Therefore,when the pre-fabricated aperture is larger,the flanged wall thickness is distributed linearly. Furthermore,the critical pre-fabricated apertures corresponding to different flanged apertures and the flange heights corresponding to the critical pre-fabricated apertures were investigated under five kinds of sheet thicknesses,and the relationship between the flanged aperture and the critical pre-fabricated aperture as well as the critical pre-formed aperture and the flange height were fitted to a parametric equation. The results show that when the thickness of sheet increases,the critical pre-fabricated aperture reduces,and the forming limit of flanging part increases.
作者
张沈杨
高锦张
Zhang Shenyang;Gao Jinzhang(Jiangsu Key Laboratory of Advanced Metallic Materials,School of Materials Science and Engineering,Southeast University,Nanjing 211189,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2020年第1期186-192,199,共8页
Forging & Stamping Technology
基金
先进数控技术江苏省高校重点建设实验室基金开放项目(KXJ05017)
关键词
渐进成形
圆孔翻边
单道次
临界翻边系数
翻边高度
incremental forming
hole-flanging
single pass
critical flanging coefficient
flange height
