汽车桥壳胀—压复合成形工艺预制坯胀形模拟研究  

Bulging simulation study on preforming tube of bulging-pressing compound-deforming process for automobile axle housing

作　　者：吴士波[1] 赵升吨[1] 张大伟[1] 

机构地区：[1]西安交通大学机械工程学院,陕西西安710049

出　　处：《锻压装备与制造技术》2014年第5期82-86,共5页China Metalforming Equipment & Manufacturing Technology

基　　金：国家自然科学基金重点项目(51335009);高档数控机床与基础制造装备国家科技重大专项(04专项)项目(2011ZX04001-011);西安市科技计划项目(CX12508)

摘　　要：以某型汽车桥壳为例,结合汽车桥壳胀—压复合成形工艺预制坯的设计方法,确定了预制坯形状与尺寸。根据预制坯的设计尺寸,确定采用两次胀形工艺与有益褶皱相结合的方式进行胀形。通过ABAQUS有限元模拟软件模拟了预制坯两次胀形过程中不同加载曲线对胀形件成形质量的影响,其中:一次胀形3种加载曲线最大胀形压强分别为10MPa、20MPa、30MPa;二次胀形3种加载曲线最大胀形压强分别为10MPa、20MPa、30MPa,分析了理想胀形件的壁厚分布情况。模拟分析表明:通过一次胀形加载曲线2可得到理想有益褶皱,进而增压得到成形质量较好的一次胀形管坯;通过二次胀形加载曲线2最终得壁厚减薄小且所需进给力小的理想预制坯。理想预制坯的壁厚最大减薄为20%,最大增厚为50%,满足汽车桥壳胀—压复合成形工艺压制过程的需要。Taking bridge shell of certain model automobile as an example, by use of design method of preforming tube of bulging-pressing compound-deforming process for automobile axle housing, the profile and size of preforming tube have been confirmed. The combination methods of double bulging process and favorable wrinkles have been adopted according to the size. The influence of different loading curves to bulging quality during double bulging process for preforming tube has been simulated by use of finite element simulation software ABAQUS. It is concluded that the maximum bulging pressure of three loading curves are respectively IOMPa, 20MPa, 30MPa in the first and second bugling phases. The ideal wall thickness distribution of bulging parts has been analyzed. The simulation analysis shows that： ideal favorable wrinkles can be obtained through first bugling process under the second loading curve while the first-bugling preforming tube with better quality has been found by adding pressure; finally, the ideal preforming tube with small wall thickness reduction and feeding force has been achieved through second bulging process under the second loading curve. The max. wall thickness reduction of ideal preforming tube is 20% and max. Increasing is 50%, which can satisfy the requirement of combination of bulging-pressing compound-deforming process for automobile axle housing.

关 键 词：胀—压复合成形 汽车桥壳 预制坯尺寸 有益褶皱 数值模拟 

分 类 号：TG316[金属学及工艺—金属压力加工]