摘要
用上限法分析了覆盖件在拉深过程中的力学特征。这一特征就是,在覆盖件的拉深过程中,由于板坯的凸缘面上的应力及应变速率的分布必须连续,从而导致圆角区域的大量质点流入了直边区域中。于是,在板坯的凸缘面上,在圆角区域与直边区域之间,形成了一个流动阻力为极大的过渡区域。减小该区域上的流动阻力,是提高板料成形性能的技术关键。
Mechanics characteristic for deep-drawing process of panel parts is analysed by upper-bound method. With the stress and strain rate distribution in the flange must being continuous, it cause that a great many particles of circular angle area flow into straight side area in the deep-drawing process of panel part. Therefore, the transition region forms between a circular angle area & straight side area, where the flow resistance is of maximum. This is a essential mechanics characteristic in the deep-drawing process of panel parts. It is a key technology to improve the forming ability of sheet metal that flow resistance in the transition region is decreased with a designed process measures.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2005年第4期114-118,共5页
Journal of Mechanical Engineering
基金
'十五'国家科技攻关重点资助项目(2001BA205B09)
关键词
拉深
力学特征
过渡区域
流动阻力
Deep-drawing Mechanics characteristic Transition region Flow resistance
