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| DP780高强钢U形弯曲回弹影响因素及优化 |
| Influence Factors and Optimization of U-shaped Bending Springback of DP780 High-strength Steel |
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| DOI：10.3969/j.issn.1674-6457.2022.10.007 |
| 中文关键词: DP780高强钢 U形弯曲回弹 有限元仿真 正交试验 |
| 英文关键词: DP780 high-strength steel U-shaped bending springback finite element simulation orthogonal experiment |
| 基金项目:湖北省教育厅科学技术研究计划青年人才项目(Q20202602) |
| Author Name | Affiliation | | DING Hua-feng | School of Automotive and Traffic Engineering, Hubei University of Arts and Sciences, Hubei Xiangyang 441053, China
Hubei Third Ring Forge Co., Ltd, Hubei Xiangyang 441700, China | | PAN Jun-jie | School of Automotive and Traffic Engineering, Hubei University of Arts and Sciences, Hubei Xiangyang 441053, China | | YAN yang | Hubei Third Ring Forge Co., Ltd, Hubei Xiangyang 441700, China | | JIN Xian-zhi | School of Automotive and Traffic Engineering, Hubei University of Arts and Sciences, Hubei Xiangyang 441053, China | | LI Hong-bing | School of Automotive and Traffic Engineering, Hubei University of Arts and Sciences, Hubei Xiangyang 441053, China | | HU Ze-qi | School of Automotive and Traffic Engineering, Hubei University of Arts and Sciences, Hubei Xiangyang 441053, China | | ZHOU Chang-yu | School of Automotive and Traffic Engineering, Hubei University of Arts and Sciences, Hubei Xiangyang 441053, China |
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| 中文摘要: |
| 目的 研究DP780高强钢不同参数对其U形弯曲回弹的影响。方法 在室温下对DP780钢板材进行拉伸试验，获得其应力应变曲线。采用U形弯曲模具模型，利用ABAQUS有限元仿真软件对U形弯曲回弹进行分析，研究摩擦因数、压边力、冲压速度和凹凸模间隙对U形弯曲回弹的影响规律，并在此基础上设计正交试验以优化影响参数。结果 在较小的摩擦因数下，回弹是有微小波动的，继续增大摩擦因数，回弹呈现减小的趋势;回弹随着压边力的增大先增大后减小;冲压速度的改变对回弹的影响不是很大;随着凹凸模间隙的增加，回弹逐渐增大。结论 通过正交试验得到4个参数对回弹程度的影响，最佳参数组合为A5B5C3D1，以此参数组合得出的侧壁角θ1和法兰角θ2最接近90°，回弹效果最好。 |
| 英文摘要: |
| The work aims to study the influence of different parameters of DP780 high-strength steel on its U-shaped bending springback. A tensile test was carried out on DP780 steel sheet at room temperature, and its stress-strain curve was obtained. The U-shaped bending die model was used to analyze the U-shaped bending springback with ABAQUS finite element simulation software, and the influence laws of friction coefficient, blank holder force, punching speed and clearance between punch and die on the U-shaped bending springback were studied. On this basis, orthogonal experiments were designed to optimize the influencing parameters. The results show that with a small friction coefficient, the springback will fluctuate slightly. Continue to increase the friction coefficient, the springback will show a decreasing trend. The springback first increases and then decreases with the increase of blank holder force. Change of the punching speed does not have a great impact on the springback. With the increase of clearance between punch and die, the springback gradually increases. The influence magnitude of the four parameters on springback is obtained through the orthogonal experiment, and the best parameter combination is A5B5C3D1. Side wall angle θ1 and flange angle θ2 obtained by this parameter combination are the closest to 90°, and the springback effect is the best. |
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