非对称四通件整体成形技术  

Integral Forming Technology for Asymmetric Cross Part

作　　者：冯苏乐[1] 徐永超[2] 徐琅 董智军[1] 黄仪 Feng Su-le;Xu Yong-chao;Xu Lang;Dong Zhi-jun;Huang Yi(Shanghai Aerospace Research Institute of Precision Machinery,Shanghai,201600;Harbin Institute of Technology,Harbin,150001;Shanghai Aerospace Electronic Technology Institute,Shanghai,201109)

机构地区：[1]上海航天精密机械研究所,上海201600 [2]哈尔滨工业大学,哈尔滨150001 [3]上海航天电子技术研究所,上海201109

出　　处：《导弹与航天运载技术》2021年第4期15-20,共6页Missiles and Space Vehicles

摘　　要：针对非对称四通件传统加工过程存在的问题,提出整体成形试验方案,串联集成“充液拉深-缩口-液压胀形-翻孔”等系列工艺,以形位尺寸及壁厚减薄率为约束指标,针对成形难度最大的拉深,分别分析了液室压力、拉深比、压边力等对成形的影响。经过试验表明,压边力为50T时,可成形良好的深筒形件,并通过设计“胀形+翻孔”组合工艺,实现非对称四通件的精确定位与小减薄率翻孔成形。经过测量零件最大减薄量为22.5%,成形良好并通过了液压强度考核试验,实现四通零件整体无缝成形,为航天多通产品整体成形提供了技术基础。In order to solve the problems of the traditional forming process of the cross part,integral forming technology is proposed,combined processes of hydraulic deep drawing,necking,hydraulic bulging and hole flanging are used.The shape and position dimensions as well as the wall thickness reduction rate are taken as constraint indexes.Liquid chamber pressure,drawing ratio,blank holder force are analyzed during the deep drawing.The results show that the blank holder force as 50T is optimal parameters to form the fine part,besides,bulging&hole-flanging process is designed to reduce the thinning rate and improve the accuracy of hole-flanging.The seamless cross part is formed with the maximum thinning rate reaches 22.5%by using of the optimal parameters.The formed part passes the hydraulic strength test and it provides a technical basis for the aerospace multi-pass product integral forming.

关 键 词：非对称四通件 整体成形 “胀形+翻孔”组合 受力分析 

分 类 号：TG394[金属学及工艺—金属压力加工]