锻压技术

轧制差厚板成形极限的理论预测与数值模拟

英文标题：Theoretical prediction and numerical simulation on forming limit for tailor rolled blank

作者：张华伟1 2 黄艳萍2 吴佳璐1 2

单位：1.广东石油化工学院机电工程学院广东省石化装备故障诊断重点实验室东北大学机械工程与自动化学院

分类号：

出版年,卷(期):页码：2022,47(3):59-64

摘要：

轧制差厚板由于其板料厚度以及力学性能具有非均一性的特点，其成形极限的准确预测成为实际应用过程中的一大瓶颈。基于前期研究中获取的轧制差厚板的几何参数以及力学性能参数，通过改变试件的形状和尺寸，对板料进行了不同应变路径下凸模胀形的数值模拟，采用数据拟合方法获取差厚板的成形极限曲线，并将其与理论公式获得的成形极限曲线进行对比；最后，应用建立的成形极限曲线来预测差厚板盒形件的成形极限。研究结果表明：通过数值模拟以及拟合方法得到的差厚板成形极限曲线与理论曲线比较接近，能够实现对实际差厚板零件的成形极限的准确预测。

Due to the characteristic of non-uniformity for blank thickness and mechanical properties of tailor rolled blank(TRB), the accurate prediction of forming limit for TRB became a major bottleneck in the practical application process. Therefore, on the basis of geometric parameters and mechanical property parcmeters of TRB obtained in the previous study, the numerical simulation of punch bulging under different strain paths for sheet was carried out by changing the shape and dimensions of the specimen, and the forming limit curve(FLC) of TRB was obtained by data fitting method. Then, the FLC obtained by simulation and fitting was compared with the FLC obtained by theoretical formula. Finally, the obtained FLC was used to predict the forming limit of TRB box-shaped part. The results show that the FLC of TRB obtained by the numerical simulation and the fitting method is close to the theoretical curve, which can more accurately predict the forming limit of actual TRB parts.

基金项目：

国家自然科学基金资助项目(51475086)；广东石油化工学院校级科研基金资助项目(2020rc020)

张华伟（1983-）男，博士，副教授 E-mail：zhanghw@neuq.edu.cn

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