多圆弧覆盖件冲压回弹研究
Study of Multi-circle Auto Panel Forming Spring-back
赵茂俞1,2， 陈乾旺1
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作者单位：1.中国科学技术大学 化学与材料科学学院，安徽 合肥 230026；2.合肥学院 机械工程系，安徽 合肥 230022
中文关键字：DP钢； 多圆弧覆盖件； 回弹； 数值模拟； 优化
英文关键字：DP steel; multi-circle auto panel; spring-back; simulation; optimization
中文摘要：针对DP钢板塑性成形的主要缺陷为回弹、破裂等，以典型高强度双相钢板DP600材料为研究对象，运用3参数Barlat-Lian屈服准则和非线性强化材料模型，对覆盖件面板进行冲压回弹成形模拟。通过将多圆弧半径、圆心角作为自变量，回弹角作为成形质量设计目标，遵循回弹前后各圆弧部分的长度相等原则，以正交试验为设计方案，模拟冲压成形。分析冲压回弹终态的冲压回弹角、残余等效应力和成形极限图，最终获得优化的圆角半径和圆心角参数组合，指导模具设计。结果表明，应用优化的模具实际冲压，板料成形质量明显提高。
英文摘要：DP sheet steel forming defects is spring-back, crack, et al. DP600 auto panel forming spring-back was simulated . Based on the three-parameter Barlat-Lian yield criteria and nonlinear materials hardening model, the auto panel faceplate was simulated forming by finite element software. The forming of auto panel was simulated while the multi-circle radius, circle angles were independent variables, and the principle of each circle length was equal while springback varied. Forming quality object (the data about spring-back values, final-state residual mean-stress, forming limit diagram(FLD)) were acquired by orthogonal experiment. The optimization circle radius and circle angles data could adjust and guide the auto panel die design. The conclusion is demonstrated that the sheet forming quality is obviously increased by the optimized forming process parameters.