锻压技术

超深冲IF钢的各向异性对前门内板冲压成形的影响

英文标题：Influence of anisotropy for ultra-deep drawing IF steel on stamping of front door inner panel

分类号：TG386

出版年,卷(期):页码：2025,50(6):69-77

摘要：

利用有限元仿真模拟软件Autoform，以汽车前门内板为研究对象，以最大减薄率和最大失效值为评判指标，通过改变材料参数条件进行模拟分析，探讨了DC05超深冲钢的塑性应变比加权平均值r、塑性应变比各向异性度Δr和落料角度θ对冲压成形性能的影响，并将实物试验结果与数值计算结果相比较，验证了方法的可靠性。结果表明：与Δr相比，r是决定超深冲钢成形性能的主要因素；当r保持恒定时，Δr对材料的冲压成形性能产生显著的影响，成形性能随着Δr的增加先下降后升高，当Δr=0.3~0.8时材料的成形性能不佳，且Δr=0.5时材料成形性能最差，因此，应尽量控制材料的Δr在0.3以下；Δr越大，θ对成形性能的影响越显著，且成形性能与其对应方向的塑性应变比rθ呈正比关系，在rθ最小的方向上成形性能最差。

For the automobile front door inner panel, taking the maximum thinning rate and the maximum failure value as the evaluation indicators, the simulation analysis was conducted by using finite element simulation software Autoform and changing the material parameter conditions to explore the influences of weighted average value of plastic strain ratio r , anisotropy of plastic strain ratio Δr and blanking angle θ of ultra-deep drawing steel DC05 on the stamping performance. Then, the physical object test results were compared with the numerical calculation results to verify the reliability of the method. The results show that compared with Δr, r is the main factor determining the formability of ultra-deep drawing steel. When r remains constant, Δr has a significant effect on the stamping formability of materials, and the formability first decreases and then increases with the increasing of Δr. When Δr is 0.3-0.8, the formability of the material is not good, and the formability of the material is the worst when Δr=0.5. Therefore, Δr of the material should be controlled below 0.3 as much as possible, the larger the Δr, the more significant the influence of stamping angle θ on the formability, and the formability is proportional to plastic strain ratio rθ in the corresponding direction, and the formability is the worst in the direction with smallest rθ.

基金项目：

广西科技重大专项(桂科AA22068079)

作者简介：黄兴鸿（1995-），男，硕士，助理工程师,E-mail：hongzi7350@163.com;通信作者：刘崇林（1983-），男，博士，高级工程师,E-mail：liuchonglin2003@163.com

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