自動沖壓線連續模式成形功的初步研究
艾衛東，桂建露，胡小軍，田 媛（江鈴汽車股份有限公司，江西 南昌 330001）
摘要：根據自動沖壓線偏心式壓力機連續模式下的行程功曲線，借助AutoForm軟件對某車型頂蓋外板拉深成形過程進行了有限元分析，并采用數值積分法對沖壓成形力和模具工作行程進行積分，得到零件成形所需的成形功，并與設備對應SPM下的輸出能量比較分析。結果表明，在恒定壓邊力工況下頂蓋外板成形功超出設備許可值，生產時設備會產生卸荷。對壓邊力加載方式進一步研究，提出了變壓邊力工況條件，模擬了極限條件及變壓邊力加載條件下的成形效果并現場驗證，通過優化成形工序的壓邊力，改善了零件成形功分布，解決了因成形功不匹配導致設備卸荷的問題，并建立了有效的數學分析模型推導過程。
關鍵詞：行程功；成形功；自動沖壓線；頂蓋外板；變壓邊力
中圖分類號：TG386.1 文獻標識碼：B 文章編號：1001-2168（2021）10-0021-05
DOI：10.16787/j.cnki.1001-2168.dmi.2021.10.005
Study on forming work of automatic stamping line in continuous mode
AI Wei-dong, GUI Jian-lu, HU Xiao-jun, TIAN Yuan (Jiangling Motors Co., Ltd., Nanchang, Jiangxi 330001, China)
Abstract: According to stroke work curve of automatic line eccentric press machine in continuous mode, the finite element analysis of the drawing process of the header outer plate was carried out by AutoForm software, and the stamping forming force and die were integrated by numerical integration method to obtain the forming work required by the parts, and the output energy of the equipment at the corresponding SPM were compared and analyzed. The results showed that in the condition of constant blank holder force, the forming work of header outer plate exceeded the allowable value of equipment, and the equipment would be unloaded during production. The way of blank holder force loading was further studied, and the working conditions of variable blank holder force were put forward. The forming effects under limit condition and variable blank holder force loading condition were simulated and verified on site. The problem of equipment unloading caused by mismatching of forming work was solved, and an effective mathematical analysis model was established by optimizing the blank holder force of parts forming process and improving forming work distribution of parts.
Key words: stroke work; forming work; automatic stamping line; header outer plate; variable blank holder force