锻压技术

镁合金方形件液压拉深成形的数值模拟

英文标题：Numerical simulation of magnesium alloy square parts in hydraulic deep drawing

作者：毛献昌杨连发刘赟李世洋

分类号：TG386.3

出版年,卷(期):页码：2013,38(3):24-28

摘要：

采用Dynaform有限元软件对AZ31B镁合金方形件的液压拉深过程进行数值模拟，研究了分块压边条件下，压边力加载方式、拉深速度、液压力等工艺参数对镁合金方形件壁厚差值和最小壁厚值的影响规律，并分析了方形件的壁厚分布特点。结果表明:镁合金方形件分块压边液压拉深过程中，当圆角块和直边块初始压边力分别为3和1kN，压力增幅ΔQ为500N，且均采用“增恒减”加载方式，液压力取12MPa，拉深速度为3000mm·s-1时，可以获得较好的成形效果；拉深后期，压边力大小不断增大或保持不变对镁合金方形件成形效果的影响程度基本一致；液压力大小对镁合金方形件的壁厚极值分布位置影响较小。

The deep drawing process of AZ31B magnesium alloy square parts in hydraulic deep drawing was simulated using the commercial FE software Dynaform. The technological parameters which influence the wall thickness difference and minimum wall thickness were introduced, including the load method of blank holder force, drawing speed, hydraulic pressure, etc. Furthermore, the wall thickness distribution of magnesium alloy square parts was discussed. The results show that preferable forming effect of AZ31B magnesium alloy square parts can be obtained in hydraulic deep drawing when deep drawing speed is 3000 mm·s-1, hydraulic pressure is 12MPa, initial blank holder force on straight blocks and circular blocks are 1 and 3 kN with both blank holder force load path on the two blocks are “increase-constant-decrease” and the press amplification ΔQ is 0.5 kN. The forming effect of square parts would be influenced similarly in deep drawing later whether the blank holder force is kept increasing or constanting. Hydraulic pressure is hardly influence the extremum wall thickness distribution of magnesium alloy square parts.

基金项目：

国家自然科学基金资助项目(51271062)；广西自然科学基金资助项目(2012GXNSFBA053147)；广西教育厅科研项目(201106LX592)；河池学院大学生创新创业训练计划项目(2013-12、2013-17)

参考文献：

［1］钟敏, 唐伟琴, 李大永，等. AZ31B镁合金板材温热成形极限实验研究[J]. 塑性工程学报, 2011, 18(5): 59-63.Zhong M, Tang W Q, Li D Y, et al. Experiment research on forming limit diagram (FLD) of magnesium alloy sheet AZ31B at warm condition[J]. Journal of Plasticity Engineering, 2011, 18(5): 59-63.
［2］Lee Y S, Kim M C, Kim S W. Experimental and analytical studies for forming limit of AZ31 alloy on warm sheet metal forming [J]. Journal of Materials Processing Technology, 2007, 187188(1): 103-107.
［3］Yang L F, Mori K I. Deformation behaviors of magnesium alloy AZ31 sheet in cold deep drawing[J]. Transactions of Nonferrous Metals Socity of China, 2008, 18(1): 86-91.
［4］El\|Morsy A W, Manabe K I. Finite element analysis of magnesium AZ31 alloy sheet in warm deep\|drawing process considering heat transfer effect [J]. Materials Letters, 2006, 60(8): 1866-1870.
［5］王冬梅, 王忠堂, 张士宏，等. 镁合金盒形件充液拉深液压力的研究[J]. 沈阳理工大学学报, 2007, 3(6):53-56.Wang D M, Wang Z T, Zhang S H, et al. Research of hydraulic pressure during hydro\|mechanical deep drawing of magnesium alloy box parts [J]. Journal of Shenyang Ligong University, 2007, 3(6):53-56.
［6］Mao X C, Wang M G. Forming limit of magnesium alloy sheet in hydromechanical deep drawing [J]. Advanced Materials Research, 2012, 482484(2): 2086-2089.
［7］喻祖建, 李钢, 李建辉. 镁合金拉深成形模具结构研究[J]. 热加工工艺, 2012, 39(3): 122-124.Yu Z J, Li G, Li J H. Study on mould structure of deep drawing process for magnesium alloy [J]. Hot Working Technology, 2012, 39(3): 122-124.
［8］方玉刚, 康永林, 朱国明. AZ31 镁合金薄板手机外壳温冲模具设计及成形效果研究[J]. 塑性工程学报, 2009, 16(1): 47-53.Fang Y G, Kang Y L, Zhu G M. Design of the warm-stamping die and experimental on formability of AZ31 magnesium alloy sheets for mobile telephone shell [J]. Journal of Plasticity Engineering, 2009, 16(1): 47-53.
［9］Chen F K, Huang T B. Deep drawing of square cups with magnesium alloy AZ31 sheets [J]. International Journal of Machine Tools & Manufacture, 2003, 43(9):1553-1559.
［10］龙向前, 毛献昌. 镁合金筒形件压力润滑拉深壁厚分析[J]. 机床与液压, 2009, 37(11): 34-37.Long X Q, Mao X C. Analysis on thickness of pressure\|lubricating deep drawing of magnesium alloy cylindrical cups [J]. Machine Tool & Hydraulics, 2009, 37(11): 34-37.

服务与反馈：

【文章下载】【加入收藏】