锻压技术

盒形件增量拉深成形数值模拟及工艺试验

英文标题：Numerical simulation and process testing of box part incremental deep drawing

作者：张庆丰金文中周旭东

分类号：TG302

出版年,卷(期):页码：2011,36(1):34-38

摘要：

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 characteristics and laws of the sheet incremental deep drawing， the track of incremental deep drawing was designed and the incremental deep drawing simulation of box was carried out by Deform-3D, then the effects of die radius and punch speed on the formed parts quality were analyzed. The effective stress and effective strain of the forming process were obtained. Finally incremental drawing die with two-way adjusting mechanism was designed and the engineer testing process was proceeded in the Gleeble 1500D heat imitating machine. Results indicate that a high-quality formed part is got if die corner radius is 1.5 mm and punch feed rate is 2.5 mm·s-1; the effective stress and strain of the box increase with the increase of deformation degree, maximum stress and minimum thickness of the thinning occur in the tangent position between straight section of tube wall and punch corner of box, where the parts are easy to be broken.

基金项目：

河南省教育厅基础研究基金资助（200410464013）

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