Reduction of Warping in Kinematic L-Profile Bending Using Local Heating

Kinematic bending of profiles allows to manufacture parts with high flexibility concerning the geometry. Still, production asymmetric cross-sections regarding force application axis using kinematic processes offers challenges springback and warping. These geometric deviations can be reduced by partial, cross-sectional heating during process as it lowers flow stress locally. In this work, influence a three-roll push-bending on warping L-profiles is investigated. Numerical experimental methods reveal temperature springback. A newly developed analytical model predicts moment in design phase assists understand effect reduction through partial plastic bending. With increasing heated profile area, up 76% bend decreased 44%. The attributed shift free fiber due gradient between room areas. stress-free leads an adapted shear center position, resulting approximated “quasi-symmetric” case.