锻压技术

成形速度及载荷对高强钢板回弹影响的研究

英文标题：Research on influence of forming speed and load on springback for high strength steel sheets

作者：徐刚李建军付秀娟

分类号：TG386

出版年,卷(期):页码：2012,37(2):15-20

摘要：

回弹问题一直是高强钢板弯曲成形的难点。本文基于伺服压力机对成形速度、载荷以及滑块行程的可控性，通过控制高强钢板弯曲成形过程中的成形速度、载荷以及滑块的行程位移，在试验的基础上探讨了成形速度及载荷等工艺条件对高强钢板弯曲回弹的影响，并通过ABAQUS有限元软件进行了相关的成形模拟。研究结果表明,随着成形载荷的增大回弹量明显减小，多次折弯可有效减小回弹。另外，成形速度和凸模保压时间对回弹影响不大。因此，在伺服压力机工作环境下，可以通过精确控制成形载荷以及折弯次数来控制高强钢板弯曲回弹量。

Springback is one of the difficulties in forming high strength steel sheets. The springback behaviour under different forming speeds, forming loads and slider displacements of servo press was investigated by Vbending experiment and simulation methods. The results show that the amount of springback will decrease obviously with the increase of forming load and the times of multiplebending. But, the effects of forming speed and holding time at the bottom dead center on the springback are very small. Therefore, the springback of forming high strength steel sheets can be controlled by controlling the forming load and bending times.

基金项目：

国家自然科学基金资助项目（50975108）

参考文献：

［1］Dan W J, Li S H, Zhang W G, et al. The effect of straininduced martensitic transformation on mechanical properties of TRIP steel[J]. Materials & Design, 2008, 29(3): 604-612.
［2］Chen Peng, Muammer Koc. Simulation of springback variation in forming of advanced high strength steels[J]. Journal of Materials Processing Technology, 2007, 190(13): 189-198.
［3］Jeanneau M， Pichant P. The trends of steel products in the European automotive industry[J]. La Revue De metallurgiesCIT，2000,(11)：1399-1408.
［4］Lee Chang Gil, Kim SungJoon, Lee TaeHo,et al. Effects of volume fraction and stability of retained austenite on formability in a 0.1C1.5Si1.5Mn0.5Cu TRIPaided coldrolled steel sheet[J]. Materials Science and Engineering A, 2004, 371(12): 16-23.
［5］Andersson A. Numerical and experimental evaluation of springback in advanced high strength steel[J]. Journal of Materials Engineering and Performance, 2007, 16(3): 301-307.
［6］张冬娟. 板料冲压成形回弹理论及有限元数值模拟研究[D].上海：上海交通大学，2006.
［7］Hilditch Tim, Speer J, Matlock D. Influence of lowstrain deformation characteristics of high strength sheet steel on curl and springback in bendundertension tests[J]. Journal of Materials Processing Technology, 2007, 182(13): 84-94.
［8］罗云华，王磊. 高强钢板冲压回弹影响因素研究[J]. 锻压技术, 2009, 34(1): 23-26.
［9］Mori K, Maki S, Tanaka Y. Warm and hot stamping of ultra high tensile strength steel sheets using resistance heating[J]. CIRP ANNAL SMANUFACTURING TECHNOLOGY, 2005, 54(1): 209-212.
［10］Mori K, Akita, Abe Y. Springback behaviour in bending of ultrahighstrength steel sheets using CNC servo press[J]. International Journal of Machine Tools & Manufacture, 2007, (47):321-325.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】