拉延筋在板料翻边成形回弹中的应用及影响  

The application and effect of drawbeads in sheet metal flanging rebound

作　　者：李军[1] 王晓枫[1] 

机构地区：[1]合肥工业大学机械与汽车工程学院,合肥230009

出　　处：《塑性工程学报》2015年第4期74-78,共5页Journal of Plasticity Engineering

基　　金：合肥工业大学马鞍山高新技术研究院与马钢合作资助项目(11Z0201025)

摘　　要：翻边成形是板料成形工艺中的重要成形方法,曲面零件的翻边成形是翻边成形中的难点和重点。在实际生产中,曲面零件翻边成形主要存在起皱、拉裂、回弹等成形缺陷。文章以DYNAFORM软件为平台,通过调整冲压方向、冲压速度和有限元模型结构,使得弯曲和翻边工序在一套模具上同时进行,且通过增加凹模的数量、充分利用拉延筋的性质、合理布置拉延筋达到了改善成形缺陷和控制回弹的效果。Flanging is an important method of sheet metal forming, in which the surface parts flanging is one of the most difficult processes. In actual production, the main surface parts flanging forming defects are wrinkling, crack, rebound and other issues. The surfaces are generally formed by two steps including bending and flanging. In this paper, based on the software of DYNAFORM, by adiusting the pressing direction, punching speed and finite element model structure, the re-bending and flanging are integrated on a mold, the number of female die is increased, and reasonable arrangement of drawbeads is conducted by taking full advantage of the feature of drawbeads to achieve the improvements on avoiding forming defects and controlling the rebound effect.

关 键 词：曲面翻边 工序 成形缺陷 拉延筋 DYNAFORM 

分 类 号：TG386[金属学及工艺—金属压力加工]