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■、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,■是决定超深冲钢成形性能的主要因素;当■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r_θ呈正比关系,在r_θ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 ■,anisotropy of plastic strain ratioΔr and blanking an-gleθof 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 withΔr,■ is the main factor determining the formability of ultra-deep drawing steel.When ■ remains constant,Δr has a significant effect on the stamping formability of materials,and the formability first decreases and then increases with the increasing ofΔr.WhenΔr is 0.3-0.8,the formability of the material is not good,and the formability of the material is the worst whenΔr=0.5.Therefore,Δr of the material should be controlled below 0.3 as much as possible,the larger theΔr,the more significant the influence of stamping angleθon the formability,and the formability is proportional to plastic strain ratio rθin the corresponding direction,and the formability is the worst in the direction with smallest rθ.
作者
黄兴鸿
刘崇林
陈拥军
李西德
吴俊源
刘富鑫
Huang Xinghong;Liu Chonglin;Chen Yongjun;Li Xide;Wu Junyuan;Liu Fuxin(Guangxi Liuzhou Iron and Steel Group Co.,Ltd.,Liuzhou 545002,China)
出处
《锻压技术》
北大核心
2025年第6期69-77,共9页
Forging & Stamping Technology
基金
广西科技重大专项(桂科AA22068079)。
