基于DEFORM-3D的7075铝合金筒型件半固态成形有限元模拟及试验验证  

Finite Element Simulation and Experimental Verification of Semi-solid Forming of 7075 Aluminum Alloy Cylinder Based on DEFORM-3D

作　　者：牛海侠 甘国强[3] 李萍[3] 薛克敏[3] Niu Haixia;Gan Guoqiang;Li Ping;Xue Kemin(School of Mechanical Engineering,Anhui Sanlian University,Hefei 230601,China;National Engineering Research Center for Vehicle Driving Safety,Hefei 230031,China;School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]安徽三联学院机械工程学院,安徽合肥230601 [2]国家车辆驾驶安全工程技术研究中心,安徽合肥230031 [3]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《稀有金属材料与工程》2022年第5期1697-1704,共8页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51575153);安徽省高校优秀拔尖人才培育资助项目(gxgnfx2019071);安徽省教育厅高校自然科学重点项目(KJ2019A0892)。

摘　　要：使用三维模拟软件DEFORM-3D,模拟了7075铝合金深腔筒型件的半固态成形过程,分析了坯料温度、模具温度及加载速度对筒型件成形过程的影响。结果表明,提高模具温度和坯料温度,能显著降低坯料的变形抗力;提高模具温度和加载速度可以减少热量损失,提高半固态坯料的充型能力。最优工艺参数为:坯料温度610℃,模具温度350~400℃,加载速度15 mm/s,此时,材料最大等效应力值为69.9 MPa。通过试验验证表明,在模拟参数下进行半固态成形,筒型件外形完整,表面品质高,组织致密,无成形缺陷。Using 3D simulation software DEFORM-3D,the semi-solid forming process of 7075 aluminum alloy deep cavity cylinder was simulated,the effects of billet temperature,die temperature and loading speed on the forming process of cylinder were analyzed.The results show that,increasing the die temperature and billet temperature can significantly reduce the deformation resistance of billet during cylinder forming;increasing the mold temperature and loading speed can reduce the heat loss and improve the filling capacity of semi-solid billet.The optimal process parameters are as follows:billet temperature 610℃,die temperature 350~400℃,punch loading speed 15 mm/s,at this time,the maximum equivalent stress value of the material is 69.9 MPa.Tests have shown that,semi-solid forming is carried out under optimized process parameters.The shape of the cylinder is complete,the surface quality is high,the structure is compact and there is no forming defect.

关 键 词：7075铝合金 半固态挤压成形 有限元模拟 温度 加载速度 

分 类 号：TG146.21[一般工业技术—材料科学与工程]