锻压技术

焊缝形式对拼焊板冲压性能的影响研究

英文标题：Research on the influence of weld-line shapes on TWBs forming properties

作者：甘勇王瀚超郭颖颖李玉刚

分类号：

出版年,卷(期):页码：2014,39(10):32-37

摘要：

针对直线焊缝、抛物线焊缝、圆弧焊缝以及折线焊缝几种常见的焊缝形式，利用Dynaform数值模拟软件，结合胀形试验对不同焊缝形式的拼焊板成形性能进行研究。研究发现，直线焊缝具有较高的极限成形高度，但焊缝移动量很大，折线焊缝拼焊板在焊缝折点处容易应力集中，相比较而言圆弧焊缝具有较好的成形性能。针对圆弧焊缝，研究了圆弧焊缝直径的变化以及位置的变化对板料成形性能的影响，得出随着厚侧母材面积的增大，极限成形高度增大，焊缝移动量减小的结论。研究结果表明，在设计拼焊板时，可将圆弧焊缝代替折线焊缝，而且选择较大的圆弧直径，焊缝位置安排在中间靠近薄侧母材的位置更有利于成形。

Based on some common weld-line shapes such as linear-weld-line, parabola-weld-line, arc-weld-line and broken-weld-line, the TWBs formability with different weld-line shapes was studied using numerical simulation software Dynaform combined with the dome test. The studies show that the linear-weld-line of TWBs has high limit forming height, but its motion quantity of weld-line is very large. The stress concentration of TWBs with broken-weld-line is produced at the break point easily. With contrast，TWBs with arc-weld-line has a better formability. Therefore, the influences of changing diameter and changing position of arc-weld-line on sheet metal formability were researched. It is concluded that the limit forming height increases with the increasing area of the thick side area, but the motion quantity of weld-line decreases meanwhile. Finally, the broken-weld-line can be replaced by the arc-weld-line, and it is benefit for the forming process when designing the TWBs by choosing large diameter and arranging the weld position in the middle of the blank near to the thin side.

基金项目：

广西自然科学基金资助项目（2013GXNSFAA019298）

甘勇（1973-），男，博士，教授

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