롤 포밍 성형법을 이용한 승합차용 자동차 범퍼 개발

Vehicle bumper shoud be meet the regulation as like as FMVSS, ECE42 and vehicle safety regulation No93. Vehicle bumper is consist of enery absorber, facia, backbeam plate, reinforcement, stay and bracet. Many research are carried out to develop the new bumper which has low cost, low weight and gigh strength by automobile company. Bumper backbeam plate is one of im portant part for weight control of bumper. Generally, bumper backbeam plate is producted by press and welding process method. But, this production method have some problems like thermal deformation during welding process and reduce of plate thickness during press process. It means the reduce the strength of bumper. To improve this problem, multi roll stamping method is applied to product the bumper backbeam plate. This method cannot reduce the thickness during the manufacturing process. In this paper, impact analysis of bumper backbeam plate using multi roll stamping carried out and evaluate the bumper can be meet the regulations for light commercial vehicle(LCV)rear bumper to apply mass production.