锻压技术

铝合金开闭机构舱门超塑气胀工艺

英文标题：Superplastic bulging process of aluminum alloy opening and closing mechanism hatch

单位：1.哈尔滨工业大学金属精密热加工国家级重点实验室 2.哈尔滨工业大学材料科学与工程学院 3.中国中车长春客车轨道股份有限公司

分类号：TG306

出版年,卷(期):页码：2024,49(3):114-126

摘要：

为了响应轨道交通领域新时代发展需求，利用有限元分析软件MSC.Marc模拟了开闭机构舱门主体件在温度为480 ℃、应变速率为0.001 s-1条件下的整体超塑气胀、快速超塑气胀、均匀快速超塑气胀的3种成形工艺，预测了材料的变形流动规律及成形缺陷，厚度均方差由整体超塑气胀时的0.129 mm依次降低至快速超塑气胀时的0.088 mm和均匀快速超塑气胀时的0.072 mm，极限减薄率由32.6%依次降低至25.1%和22.3%。结果表明，集热冲压与超塑正反胀工艺优势于一体的刚柔介质协调成形的均匀快速超塑气胀工艺最佳，并将其作为实际成形工艺路径。

In order to respond to the development demand of the new era in the field of rail transit, three forming processes of integral superplastic bulging, rapid superplastic bulging and uniform and rapid superplastic bulging for the main body of opening and closing mechanism hatch at 480 ℃ and 0.001 s-1 were simulated by FEA software MSC.Marc, and the material deformation flow patterns and forming defects were predicted. In addition, the mean square deviation of thickness decreases from 0.129 mm for the integral superplastic bulging to 0.088 mm for the rapid superplastic bulging and 0.072 mm for the uniform and rapid superplastic bulging, and the ultimate thinning rate decreases from 32.6% to 25.1% and 22.3%, respectively. The results show that the uniform and rapid superplastic process of rigid-flexible medium coordinated forming is the best, which combines the advantages of hot stamping and superplastic forward and reverse bulging, and it is taken as the actual forming process path.

基金项目：

国家自然科学基金资助项目（51875122）

作者简介：赵佳乐（2000-），男，硕士研究生，E-mail：zhaojiale2396@163.com；通信作者：王国峰（1973-），男，博士，教授，E-mail：gfwang@hit.edu.cn

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