工艺参数对Ti75合金筒形件旋压成形的影响  

Influence of Process Parameters on Ti75 Alloy Tube Spinning

作　　者：韩冬[1] 杨合[1] 詹梅[1] 牟少正 杨延涛 

机构地区：[1]西北工业大学材料学院,西安710072 [2]西安航天动力机械厂,西安710025

出　　处：《宇航材料工艺》2011年第4期48-50,56,共4页Aerospace Materials & Technology

基　　金：国家"863计划"(2008AA04Z122)资助

摘　　要：建立了Ti75合金筒形件旋压三维有限元模型,分析了旋压过程中应力应变的分布规律。得到了进给速率、减薄率和旋轮工作角三个关键工艺参数对旋压过程的影响规律:随着旋轮工作角、进给速率和减薄率的增加,旋压力和隆起高度均增大;等效塑性应变随着减薄率的增加而增大,随进给速率的增大而减少,进给速率超过1 mm/s时,等效塑性应变基本保持不变;工作角小于20°范围内变化时,最大等效塑性应变几乎不变,当旋轮工作角超过25°,最大等效塑性应变迅速增大。A 3D FEM model of Ti75 alloy tube spinning was established.The distribution regulation of stress and strain during spinning process was analyzed.The influences of feeding,reduction and angle of roller on spinning process were obtained.The force and piling distance of spinning increased with increasing roller angle,feeding speed and reduction ratio.The PEEQ increased with increasing reduction ratio,decreased with increasing feeding speed.The PEEQ is hardly changed when feeding speed is above 1mm/s.The PEEQ is almost constant when the roller angle are smaller than 20 degree.The PEEQ increased quickly with roller angle when the roller angle exceed 25 degree.

关 键 词：TI75合金 旋压 有限元 模拟 

分 类 号：TG519.1[金属学及工艺—金属切削加工及机床]