有限元在铜排回弹及折弯机构优化中的应用

Application of Finite Element in Copper Springback and Optimization of Bending Mechanism

电气控制行业对铜排质量的要求越来越高,而铜排在折弯过程中产生回弹是不可避免的现象,减少铜排折弯后的回弹角度可以极大地提高母线产品质量的一致性。运用有限元法对铜排的折弯变形及卸载回弹的过程进行了仿真分析,揭示了基于弹塑性弯曲工程理论的2个假设与实际折弯过程不相符,总结了铜排弯曲回弹变化的规律。最后根据校正法,提出了减小铜排回弹角度的结构方案,并通过仿真验证了该方案的可靠性。

The demand of copper quality in the electric control industry is higher and the phenomenon that coppers in the bending process produce springback is inevitable. The consistency of product quality can be greatly improved by reducing the springback angle after bending the copper. The simulation analysis is carried out on bending deformation and unloading of copper by using the finite element method. It reveals that the two assumptions based on the elastic bend theory are unrealistic and sums up the rules of the copper bending and springback. Finally, according to the correction method, the structure scheme is put forward to reduce the copper rebound angle and the reliability of the proposed scheme is verified by simulation.