锻压技术

无凸缘球底筒形件成形工艺优化设计

英文标题：Optimization design of forming process of no-flanged spherical-bottomed cylindrical parts

作者：曹秀中陈炜

关键词：无凸缘球底筒形件有限元拉深

分类号：TG386

出版年,卷(期):页码：2014,39(5):36-39

摘要：

在对无凸缘球底筒形件成形分析的基础上，建立球底区域的应力模型，并获得平衡微分方程。对球底区进行应力分析，确定压边力、凹模圆角半径、摩擦系数等影响球底圆筒形零件成形极限的重要因素。根据成形方案，首先进行数值模拟成形，并对模拟结果进行综合分析，确定压边力、凹模圆角半径、摩擦系数等参数对球底圆筒形零件变薄率和凸耳值的影响；然后通过实验验证，实现无凸缘球底筒形件成形时无切边工序的工艺优化。研究结果表明，凹模圆角半径越小，对控制球底部位内皱的效果越好，降低摩擦系数能够有效降低成形中的凸耳尺寸。

On the basis of forming analysis about the no-flanged spherical-bottomed cylindrical parts, the stress model was established and the differential equations was got at the spherical-bottomed regional. By the stress analysis of ball bottom area, the blank holder force, die corner radius, friction coefficient, etc., which were important affecting factors for forming limit of spherical-bottomed cylindrical parts, were determined. According to the forming program, firstly, the forming numerical simulation was finished, and the effect of blank holder force, die corner radius, friction coefficient on the thinning rate and lug value of spherical-bottomed cylindrical parts were determined by the comprehensive analysis of simulation results. Then, through experimental verification, the processing optimization without trimming process during no-flanged spherical-bottomed cylindrical parts forming was realized. The results show that the die radius is smaller，the controlling effect of ball bottom wrinkle is better, and reducing friction coefficient can effectively reduce the size of lug.

基金项目：

2013江苏省高等职业院校国内高级访问学者计划资助项目（FX092）；博士点基金博导类课题资助项目（20133227110013）

曹秀中（1973-），男，工学硕士，副教授

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