The Jaw Trajectory Design and Numerical Simulation of Stretch-bending in 3-dimension for Profiles

Abstract

Aimed at 3D stretch bending of profile, this paper put forward a jaw trajectory design method based on the tangent geometric relationship between the profile and the die for simulation. Firstly, based on the structure characteristics of the forming contour, extract the profile line and analyze the curvature variation. By setting numbers of feature points to discrete the contour line and extract the coordinates of feature points; then, calculate the jaw displacement and deflection angle in each forming process according to the tangent relationship between the profile and the die in the bending processes. Finally, input the obtained forming trajectory into finite element software to simulate the bending processes accurately. In this paper, finite element method was used to simulate the 3D stretch bending of profile to prove the validity of the trajectory design and analyze the bending processes.