覆盖件拉深过程中的力学特征分析  

ANALYSIS ON MECHANICS CHARACTERISTIC FOR DEEP-DRAWING PROCESS OF PANEL PARTS

作　　者：李赞[1] 董湘怀[2] 李建军[1] 

机构地区：[1]华中科技大学模具国家重点实验室,武汉430074 [2]上海交通大学模具CAD国家工程研究中心,上海200030

出　　处：《机械工程学报》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)

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.

关 键 词：拉深 力学特征 过渡区域 流动阻力 

分 类 号：TG386.3[金属学及工艺—金属压力加工]