型材单辊柔性垫弯曲曲率半径变化规律研究

通过ABAQUS软件对典型截面型材的单辊柔性垫弯曲进行了模拟,研究了压入深度、压辊直径、聚氨酯垫厚度等对曲率半径的影响,并与实验结果进行了对比.结果表明,随着压入深度的增加,曲率半径迅速减小并在一定压入深度下趋于稳定,而曲率基本呈线性增加趋势.随聚氨酯垫厚度的增加,曲率半径逐渐增大,弯曲变形程度减小.压辊直径的变化对曲率半径的影响较小.实验所得曲率半径变化规律与有限元模拟结果吻合较好,但是因实验时的实际压入深度小于预定值,导致实验所得型材曲率半径偏大.

On curvature radius of profiles bent with single roller and hyper-elastic pad

Single roller bending of profile with typical section-shape was analyzed by ABAQUS.The effect of penetration depth,roller radius and PUR pad thickness was investigated,and compared with experimental results.Experimental results show that the curvature radius decreases rapidly as penetration depth increases,and becomes stable as certain penetration depth is reached.The curvature of bent profile increases linearly as penetration depth increases.As the PUR pad thickness increases,the curvature radius increases,i.e.,smaller bending deformation happens.The change of roller radius has little effect on curvature radius.The FEM results agree well with the experimental results.However,the curvature radius obtained by experiments is bigger than that of the FEM results,which is mainly caused by the smaller penetration depth realized in experiments compared with FEM simulation.