金属板料成形弯曲力算法及仿真分析

Algorithm and simulation analysis of bending force in sheet metal forming processes

通过分析板料在冷弯成形时的弹塑性变形及硬化特性,推导出自由弯曲时所需的弯曲力,与经验公式相比更具科学性和准确性。利用非线性有限元Marc建模仿真,得到冷弯时弯曲力与弯曲角的关系及特殊节点的应力、应变,验证了公式的正确性,对冷弯型钢成形提供理论依据,具有一定的参考价值。

Free bending force was deduced by analysis of the elastic-plastic deformation and hardening properties of sheet metal during the cold bend forming,which is more scientific and accurate than the empirical formula.Through establishing model and simulation by the nonlinear finite elementMarc,the relationship between bending force and bending angle was obtained,and the stress and strain in special nodes were analyzed,which verifies the accuracy of the formula.It provides a theoretical basis for cold-formed steel molding and has a certain reference value.