工艺参数对FVS0812铝合金板半球形件拉深成形影响的有限元分析  

Finite Element Analysis of Craft Parameter Influence on FVS0812 Aluminum Alloy Sheet Hemispheroid Drawing Forming

作　　者：曾新祥[1] 陈水先[2] 张辉[3] 邓学峰[3] 何江衡 

机构地区：[1]湘南学院数学系,湖南郴州423000 [2]湘南学院物理系,湖南郴州423000 [3]湖南大学材料科学与工程学院,湖南长沙410082 [4]加拿大国家地质调查局

出　　处：《湘潭大学自然科学学报》2008年第2期107-112,共6页Natural Science Journal of Xiangtan University

基　　金：国家科技部创新基金项目(07C26214301749);湖南省自然科学基金项目(07JJ5067)资助

摘　　要：应用有限元分析软件DEFORM3D结合半球形件温成形实验,研究了不同温度组合、不同压边力和摩擦系数对FVS0812耐热铝合金热拉深成形性能的影响.结果表明:在拉深过程中,最大应变区出现在1/4～1/3凸模半径处,工件出现断裂时对应损伤(Damage)临界值是0.24;使用冷模热工件及压边圈的方式可以在工件变形区建立有利的温度梯度,使工件的应变分布趋于均匀,压边力减小有利于减少断裂出现的危险性,良好的润滑也能使应变,应力分布得到改善;对比实验结果,损伤区域的预测与实验结果相吻合.The impact of different temperature combination, pressure pad force and friction coefficient on FVS0812 heat resisting aluminum alloy hot drawing forming process was investigated numerically employing the finite element analysis software DEFORM3D and experimentally using the hemispheroid warm forming tests. The results show that the largest strain area appears in 1/4 ～ 1/3 of the raised mold radius in the drawing process, and the critical Damage value is 0. 24 when fracture occurred. The results also demonstrate that the preferred temperature is likely to be built in workpiece deformation area by employing the cold mold, hot workpiece and the pressure edge marked with a circle, leading to the smooth strain distribution for the workpiece. Furthermore, decreasing the pressure edge force results in the reduction of fracture risk, and the good lubrication also improves the strain and the stress distributions. Excellent agreement is observed between the numerical result and the experiment for the Damage area prediction.

关 键 词：温成形 压边力 摩擦系数 有限元分析法 FVS0812铝合金 

分 类 号：TG386.32[金属学及工艺—金属压力加工] TP311.52[自动化与计算机技术—计算机软件与理论]