板料胀形成形中的工艺预冲孔尺寸优化研究  

Size optimization research on pre-punching hole during bulging forming

作　　者：孙立君[1] 黄珍媛[2] 阮锋[2] 

机构地区：[1]广东水利电力职业技术学院机械工程系,广东广州510635 [2]华南理工大学机械与汽车工程学院,广东广州510641

出　　处：《锻压技术》2012年第5期162-165,共4页Forging & Stamping Technology

基　　金：广州市科技攻关项目"汽车大型冲压件的成形及其模具技术的开发与应用"(2004Z3-D0101)

摘　　要：结合有限元模拟技术和试验方法研究了预冲孔对板料胀形工艺的影响,发现预冲孔可以增加预冲孔附近材料向侧壁流动的趋势,降低凸模圆角处的塑性变形量,避免此区域破裂的产生。利用有限元模拟和0.618法对预冲孔尺寸进行优化设计,运用Ф评定因子评估优化结果的合理性,得到了最优的预冲孔尺寸,优化结果与试验结果一致。结果表明,所提出的预冲孔优化方法能快速准确的优化局部胀形的预冲孔尺寸,该方法对其他复杂的局部形状的成形工艺具有实际参考价值。Combined the finite element simulation and experimental method,the influence of pre-punched holes on sheet bulging was studied.The results show that the pre-punched holes can increase the flow-trend of material near the pre-punched holes toward the side wall,lower convex die corner plastic deformation and avoid rupturing in this area.Combined with the finite element simulation and 0.618 method,the pre-punching hole size was optimized,the rationality of optimization results were assessed using evaluation factors and the optimal pre-punching hole size was got.The optimization result was consistent with the experimental result.The results show that the proposed pre-punching optimization method can quickly and accurately optimize local bulging pre-punching hole size and has a practical reference value to other complex local shape forming process.

关 键 词：胀形 预冲孔 Ф因子法 0.618法 

分 类 号：TG386[金属学及工艺—金属压力加工]