锻压技术

AA5754铝合金板材渐进成形壁厚均匀性研究

英文标题：Study on wall thickness uniformity in incremental forming for aluminum alloy AA5754 sheet

作者：谷岩波王辉王会廷靳凯郭训忠

分类号：TG386

出版年,卷(期):页码：2018,43(1):33-41

摘要：

为改善板材渐进成形制件的壁厚均匀性，采用ABAQUS/Explicit有限元仿真软件对AA5754铝合金板材渐进成形工艺进行数值模拟，建立了适用于渐进成形的有限元模型，并进行了渐进成形实验，通过模拟结果与实验结果对比，验证了模型的准确性。同时，分析了夹具开口尺寸、成形速度和背压压力3种工艺参数对渐进成形制件侧壁壁厚均匀性的影响。结果表明：夹具开口尺寸和成形速度对渐进成形制件壁厚均匀性影响较大，且夹具开口尺寸越小、成形速度越大，壁厚均匀性越好；另外，背压的存在也有利于改善壁厚均匀性，但是当背压大于一定值时，会产生较为严重的鼓包缺陷。

In order to improve the wall thickness uniformity of incremental forming components for sheet, the incremental forming process of aluminum alloy AA5754 sheet was numerically simulated by finite element simulation software ABAQUS/Explicit. Then, the finite element model suitable for incremental forming was established, and the incremental forming experiment was carried out. Furthermore, the accuracy of model was verified by comparing simulation results and experimental results. Meanwhile, the influences of clamping opening size, forming speed and back pressure on the thickness uniformity of side wall of incremental forming components were analyzed. The results show that the clamping opening size and forming speed have great influence on the wall thickness uniformity of incremental forming components, and the smaller the clamping opening size and the greater the forming speed are, the better the wall thickness uniformity is. In addition, the existence of back pressure is also beneficial to improve the wall thickness uniformity. However, more serious bulging defects are produced when the back pressure is over a certain value.

基金项目：

国家自然科学基金资助项目（51275003）；江苏高校优势学科建设工程资助项目；航空科学基金项目（2016ZE52047）

作者简介：谷岩波（1989-），男，硕士研究生，E-mail：guyanbo@nuaa.edu.cn；通讯作者：郭训忠（1981-），男，博士，副教授，E-mail：guoxunzhong@nuaa.edu.cn

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