控制压边力改善铝合金板成形性能的研究  

Control of the blank-holder force to improve the formability of aluminum alloy sheet

作　　者：孙成智[1] 陈关龙[1] 林忠钦[1] 倪峰[2] 鲍文华[2] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030 [2]上海大众汽车有限公司,上海200030

出　　处：《材料科学与工艺》2005年第4期445-448,共4页Materials Science and Technology

基　　金：国家杰出青年科学基金资助项目(NO.50225520).

摘　　要：以5052H32铝合金板为研究对象,以有限元数值模拟和基于计算机控制多点变压边力液压压力机的实验为手段,研究随位置变化的压边力对铝合金板成形性能的影响.研究结果表明:合理地控制随位置变化的变压边力可以显著提高铝合金板的成形性能,增加盒形件的拉深深度(最大拉深高度提高约12%);随位置变化的压边力对铝合金成形性能改进的主要原因是减少破裂危险区域壁厚减薄和应变的峰值;采用Barlat 96屈服准则描述铝合金的屈服行为具有较高精度,数值模拟和实验的偏差较小.Based on numerical simulations and experiments performed on the multi-point variable blankholder force hydraulic press, the effects of variable blankholder forces （locally around the blank holder surface） on the formability of 5052H32 aluminum alloy sheets was investigated. The simulation and experimental results demonstrated that the variable blank-holder force can improve the formability of aluminum alloy sheets and achieve greater draw depths （ maximum draw depths improved about 12% ）, and the main reason for improving the formability is that variable blankholder forces （locally around the blank holder surface） can decrease the thickness reduction and the peak value of strains in potential fracture areas. Finally, all the results derived from the FEM analysis show reasonable agreement with the experimental data.

关 键 词：铝合金 数值模拟 板抖成形 变压边力 

分 类 号：TG386[金属学及工艺—金属压力加工]