Patent ID: 6820451
Filing Date: 2004-11-23
Classification: B21D,B60R

Abstract:
A method for producing a roll formed bumper comprising of a metal material and having a predetermined transverse cross section and a predetermined curvature, said method comprising:feeding a bumper structure into a forming assembly along a line level, said bumper structure having said predetermined transverse cross section and an essentially straight longitudinal configuration, said forming assembly comprising a driven support roller and a pair of driven cooperating flexing rollers, a first roller of said pair of flexing rollers positioned to deflect said bumper structure out of said line level and a second roller of said pair of flexing rollers mounted to revolve about said first roller, simultaneously driving said support roller and counter-rotating said pair of cooperating flexing rollers for feeding said bumper structure between said pair of cooperating flexing rollers, and revolving said second flexing roller about said first flexing roller to flex said bumper structure between said support roller and said first flexing roller thereby imparting a permanent longitudinal curvature to the bumper structure.