一种变截面拉延筋新工艺及其在回弹控制中的应用  

A New Technology of Non-uniform Section Drawbead and Its Application in Springback Controll

作　　者：黄健梓[1] 杨旭静[1] 

机构地区：[1]湖南大学,汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《科技导报》2009年第9期69-72,共4页Science & Technology Review

基　　金：国家科技支撑计划项目(2007BAF29B01)

摘　　要：在薄板冲压成形工艺中,引入了一种变截面拉延筋新工艺,对该拉延筋的阻力模型进行了分析,并以汽车外覆盖件为研究对象,根据板料成形特点及回弹规律,对顶盖冲压成形进行了回弹仿真分析。在回弹仿真过程中,该拉延筋对冲压件的成形有着显著的影响,使之得到充分的延展,大大提高了覆盖件的成形质量。仿真结果显示,采用变截面拉延筋新工艺,可以有效控制浅冲压件拉延成形的回弹,对实际生产中制定合理的冲压工艺方案具有一定的指导意义。For sheet metal forming, a new technology of non- uniform section drawbead is proposed. A friction model is adopted for the drawbead and a springback simulation of roof is carried out based on the formibility and springback of a blank sheet. The simulation shows that the drawbead has a remarkable effect on shaping quality through its role in helping a full extension. Accordingly, a reasonable method to effectively control the springback is obtained based on the model of non-uniform section drawbead, which may give some guidance in planning a forming procedure in practice.

关 键 词：变截面拉延筋 冲压成形 有限元 回弹分析 

分 类 号：TG386.32[金属学及工艺—金属压力加工]