第42卷第11期 Vol. 42No. 11
饭
压技
FORGING & STAMPING TECHNOLOGY
轧制差厚板盒形件充液拉深成形的数值模拟
张华伟，吴佳璐
（东北大学机械工程与自动化学院，辽宁沈阳110819)
2017年11月 Nov.2017
摘要：为了解决轧制差厚板在拉深成形过程中的破裂、起皱、过渡区移动等缺陷同题，应用充波拉深方法完成差厚板零件的成形。通过数值模拟技术，对轧制差厚板的充液拉深成形性能进行研究，完成差厚板盒形件充液拉深成形的仿真，对比分析充液拉深成形与普通拉深成形的优势，讨论液体压力对于差厚板成形性能的影响。结果表明，采用充液拉深技术能够改善差厚板的成形性能。随着液体压力的增加，厚度减薄率呈现先减小后增大的趋势，而过渡区移动量则逐渐减小。大尺寸的差厚板对液体压力的变化更为数感，但无论对于哪种尺寸的板料，采用合适的液体压力均能够获得高质量的差厚板零件。
关键词：轧制差厚板；充液拉深；盒形件；厚度减薄率；过渡区移动 DOI: 10. 13330/j. issn. 1000-3940. 2017. 11. 006
中图分类号：TG386
文献标识码：A
文章编号：1000-3940（2017）11-0032-05
Numerical simulation on hydro deep drawing for box part of tailor rolled blank
Zhang Huawei, Wu Jialu
( School of Mechanical Engineering and Automation, Northeastern University , Liaoning 110819, China)
Abstract : In order to solve the problems of erack, wrinkle and transition zone movement for tailor rolled blank (TRB) in the process of deep drawing, TRB parts were manufactured by hydro deep drawing ( HDD) process. Then, the formability of TRB in HDD was studied by numerical simulation, and the HDD process of TRB box part was simulated. Furthemore, HDD was compared with traditional draw-ing, and the influences of liquid pressure on the fomability of TRB were diseussed. The results show that the formability of TRB can be improved by the application of HDD, As the liquid pressure increases, the thickness thinning decreases first and then increases, and the thickness transition zone movement decreases. TRB with larger size is more sensitive to the variation of liquid pressure than that with smal-
aas ue im r a og nenb e surd a anbo o paaaas aq ura anssaud penb] adod aramo as [ Key words : tailor rolled blank (TRB) ; hydro deep drawing ; box part; thickness thinning; thickness transition zone movement
从目前实际应用情况来看，轧制差厚板（Tailor RolledBlank，TRB）主要用于汽车梁结构的制造，对于更为复杂的车身覆盖件则很少采用差厚板进行
收稿日期：20170717；修订日期：20170930
基金项目：国家自然科学基金资助项目（51475086）；河北省自然科学基金项目（E2016501118）；中国博士后科学基金（2016 M591404)；河北省高等学校科学技术研究重点项目资助(ZD2017315)
作者简介：张华伟（1983-），男，博士，讲师 E-mail: zhanghw@ neuq, edu. cn
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方数据WhanUnnity Techgy,Fine hkingfomingmethod
生产[]。这一方面是由于梁结构比较简单，其成形过程容易控制。另一方面则是因为差厚板存在板料厚度、机械性能的差异[2]，在成形过程中应力与应变分布不均勾[3]，从而导致差厚板在拉深成形过程中不仅会发生破裂、起皱等缺陷，还会产生过渡区移动现象[4)，并且引起模具发生不均匀磨损，降低模具的使用寿命。而充液拉深正是解决差厚板拉深成形工艺问题的一种理想方法[5]
采用充液拉深进行差厚板零件的成形，差厚板的板厚差可以完全在高压液体一侧体现，高压液体
reducing or eliminating angle of collapse [ P].
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