合理地选择冲压件的毛坯外形 ,可以提高板料的成形性 ,同时也可以提高材料利用率。本文着重研究了一步成形模拟方法中松弛因子对收敛的稳定性和收敛效率的影响问题 ,提出了一种基于 0 618法的松弛因子优化算法 ,并且设计编制了计算程序。通过球冠、L形件、行李箱盖外板、T形件 4个算例 ,与一系列未经优化的固定松弛因子结果进行了比较 ,验证了此方法的有效性 Reasonable choice of blanking blank shape, can improve sheet formability, but also can improve material utilization. This paper focuses on the influence of the relaxation factor on the convergence stability and convergence efficiency in one-step simulation. A relaxation factor optimization algorithm based on 0 618 method is proposed, and the calculation program is designed. Through the four examples of the spherical cap, the L-shaped piece, the trunk lid and the T-piece, the results of a series of un-optimized fixed-relaxation factors are compared to verify the effectiveness of this method