薄壁铝合金封头挡板辅助旋压成形方法  

Baffle-Assistant Spinning Method for Thin-Walled Aluminum Alloy Seal Head

作　　者：史敏[1] 赵亦希[1] 孔庆帅[1] 于忠奇[1] 

机构地区：[1]上海交通大学上海市复杂薄板结构数字化制造重点实验室,上海200240

出　　处：《上海交通大学学报》2015年第10期1497-1503,共7页Journal of Shanghai Jiaotong University

基　　金：国家重点基础研究发展规划(973)项目(2014CB046601)资助

摘　　要：针对毛坯厚度1mm的薄壁铝合金封头零件,提出了挡板辅助旋压成形工艺,并采用数值模拟方法进行研究,讨论了挡板辅助旋压成形中的主要工艺参数进给率、旋轮圆角半径和旋轮安装角对成形质量的影响.结果表明:相对于传统的先剪切旋压后普通旋压的多道次成形工艺,挡板辅助旋压成形工艺能够减少工序道次,提高成形效率并改善壁厚均匀性;在径厚比增大到300的情况下,传统工艺需要增加道次来解决起皱问题,而挡板辅助旋压成形工艺仍然可以一道次成形,且径厚比越大,其对壁厚均匀性的改善作用越明显;旋轮圆角半径对壁厚均匀性和贴膜度的影响最大,减小旋轮圆角半径可使贴膜度提高,但会降低壁厚均匀性.The baffle-assistant spinning technology was proposed for thin-walled aluminum alloy seal head,which was studied using numerical simulation.Compared with the traditional multi-pass forming technology,the proposed method can reduce the number of passes to improve efficiency,and uniformity of wall thickness.The number of passes need to be increased to solve the wrinkling problem in the traditional process on condition of large diameter-thickness ratio,but seal head can be formed well with one pass using the baffle-assistant spinning method.It improves the thickness for higher diameter-thickness ratios.In further study,the influence of dominant parameters including feed rate,corner radius of roller and attack angle under new conditions will be discussed.

关 键 词：薄壁铝合金 封头 挡板辅助旋压方法 径厚比 成形质量 

分 类 号：TG386.4[金属学及工艺—金属压力加工]