Sheet Bulk Forming of Thin-Walled Components with External Gearing through Upsetting Using Controllable Deformation Zone Method  

作　　者：Xincun Zhuang Meile Liang Shengfa Zhu Yin Zhu Zhen Zhao 

机构地区：[1]Institute of Forming Technology and Equipment,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200030,China [2]National Engineering Research Center of Die&Mold CAD,Shanghai Jiao Tong University,Shanghai 200030,China

出　　处：《Chinese Journal of Mechanical Engineering》2021年第5期282-295,共14页中国机械工程学报（英文版）

基　　金：Supported by National Natural Science Foundation of China(Grant Nos.51875351,51475296).

摘　　要：Sheet-bulk metal forming(SBMF)is a promising process for manufacturing complex sheet components with functional elements.In this study,the entire forming process for a typical thin-walled component with external gearing is investigated,including sheet forming and bulk forming processes.Deep drawn cups are prepared during sheet forming;subsequently,upsetting is performed on the sidewall to form external gearing.The upsetting method performed is known as upsetting with a controllable deformation zone(U-CDZ).Compared with the conventional upsetting method,a floating counter punch with a counter force is used in the U-CDZ method such that the forming mechanism is changed into the accumulation of the deformation zone instead of deformation throughout the entire sidewall.The effects of the counter force and material flow are investigated to understand the mechanism.The forming quality,i.e.,the formfilling and effective strain distribution,improved,whereas a high forming load is avoided.In addition,a punch with a lock bead is used to prevent folding at the inner corner during the experiment.

关 键 词：Sheet-bulk metal forming Thin-walled components External gearing Controllable deformation zone 

分 类 号：TG316.11[金属学及工艺—金属压力加工]