拉形与渐进成形在钣金零件快速制造中的复合应用研究  

Research on combined application of stretch and incremental forming in the sheet metal of rapid manufacture

作　　者：王德亮[1] 高霖[1] 王辉[1] 吴梦陵[1] 汤泽军[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《锻压技术》2015年第2期26-31,共6页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(51105203)

摘　　要：分析了拉形与数控渐进成形的工艺特点,开发了利用有限元分析来确定拉形不贴模区域边界的系统;设定了复合成形工艺参数,在数控渐进成形机床上实现一次装夹的复合成形。通过试验对渐进成形和复合成形的成形件质量进行了分析,结果证明,复合成形比渐进成形加工的零件成形精度高,厚度分布更均匀。对于复合成形,拉形行程越大,精度越高,但厚度减薄更严重,拉形行程过大会导致零件拉裂。凹陷区域的成形采用了固定轴跟随零件层加工,与传统的等高线层加工相比,具有较好的表面质量和较高的精度。By analyzing process characteristic of the stretch forming （SF） and incremental forming （IF）, the system which can deter- mine the boundary without fitting the die by SF was built using finite element analysis. The process parameters of the combined forming were set in order to form on the original incremental forming equipment by one clamping system. The quality of parts by incremental form- ing and combined forming was analyzed through experiment. The results show that combined forming can improve the geometry accuracy and obtain more uniformity in thickness distribution. Furthermore, the larger the stroke length is, the more accuracy is obtained. Howev- er, it leads to a more serious thickness thinning and even causes parts to crack. The forming in the area of grooves is machined by part layer with fixed axis, and it has good surface quality and high accuracy compared with contour layer processing.

关 键 词：拉形 渐进成形 有限元分析 复合成形 

分 类 号：TG386[金属学及工艺—金属压力加工]