锻压技术

铝合金折叠夹层结构的冲压成形工艺

英文标题：Stamping process of aluminum alloy folded core structure

作者：段春争徐振

单位：大连理工大学

分类号：TG386

出版年,卷(期):页码：2015,40(9):21-26

摘要：

铝合金折叠夹层结构具有很好的能量吸收特性和灵活的可设计性，由于铝合金折叠夹层结构加工成形困难，限制了其应用和发展。为了找到简单、高效的成形方法，通过实验方法研究了5052、6061和7075 三种型号的铝合金折叠结构的冲压成形工艺，探讨了材料性能、板厚、冲压速度、板材初始温度等因素对折叠结构冲压成形质量的影响。研究结果表明，冷冲时，较低的冲压速度可以使危险点处的减薄率较小；热冲时，过高和过低的冲压速度都不利于成形；提高铝合金板材的初始成形温度对成形质量有明显改善。

Folded core structure of aluminum ally is of good energy absorption ability and can be designed flexibly. However, the difficulty in forming of aluminum alloy folded core structure limits its application and development. To find a simple and efficient forming method, the stamping processes of aluminum alloy 5052, 6061 and 7075 folded core structure were studied experimentally. And the influences of different factors such as material properties, sheet thickness, stamping speed and initial temperature of sheet on the forming process were discussed. The results show that in cold stamping process, the slow stamping velocity results in less thinning rate at danger point, while in hot stamping process both too fast and too slow stamping speeds are not fit for forming folded core structure. Furthermore, the increase of initial temperature of aluminum sheet can modify the quality of forming.

基金项目：

段春争（1970-），男，博士，副教授，博导

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