锻压技术

TA15钛合金深腔形零件超塑成形试验与仿真研究

英文标题：Experiment and simulation investigation on superplastic forming process of a TA15 titanium alloy deep cavity shaped part

作者：王月林黄烜昭李小强李东升郭贵强

单位：沈阳飞机工业(集团)有限公司北京航空航天大学

关键词：超塑成形深腔形零件仿真贴模度减薄率

分类号：V261.7

出版年,卷(期):页码：2015,40(9):37-42

摘要：

利用PAM-STAMP有限元仿真分析软件，对1.8 mm厚TA15钛合金板料深腔形零件在945 ℃下的超塑成形进行数值模拟，得到优化了的时间-压力曲线与零件的厚度分布图，并设计了相应的成形模具。根据仿真优化得到的时间-压力曲线对该零件进行超塑成形试验，用三维扫描设备扫描零件的外形得到点云数据，并用超声波测厚仪测量零件的厚度分布。将仿真结果与实际零件的三维外形和厚度进行对比发现，试验成形零件与仿真成形零件的外形误差在0.6 mm以内，而且厚度分布趋势一致，最大误差为17.98%；试验成形零件的最大减薄率为64.3%，满足设计要求，验证了有限元仿真模型的准确性。

The superplastic forming process of TA15 titanium alloy deep cavity part at 945 ℃ was carried out by software PAM-STAMP, and then the optimized pressure-time curve and the thickness distribution were obtained. Furthermore, the die of the deep cavity part was designed. The superplastic forming experiment of the part was done based on pressure-time curve obtained from simulation. Then, point cloud data of the practical part contour was obtained by a three dimensional scanning device and its thickness distribution was measured by an ultrasonic thickness meter. The shapes and thickness distributions obtained from simulation and experiment were compared. The results show that the contour error between the simulation and experiment is less than 0.6 mm. The two kinds of thickness distributions have the same trend. The max error is 17.98% and the max thickness reduction is 64.3%, which meet the design requirement. The accuracy of the calculated model is verified.

基金项目：

国家科技重大专项“高档数控机床与基础制造装备”（2013ZX04001-041）

王月林（1982- ），男，硕士，工程师;通讯作者：李小强（1979- ），男，博士，副教授

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