针对高强钢汽车轮辐在实际生产过程中经常出现反拉深－翻边复合工序中中心孔翻边开裂这一问题，采用有限元数值模拟的方法，建立了有限元模型，并通过试制轮辐验证其可靠性。模拟获得了新型高强钢材料B550CL在用于轮辐翻边成形时的应力应变的分布和变化规律，并进一步对轮辐的损伤和壁厚分布情况进行了分析。研究表明：反拉深－翻边复合工序中翻边区在成形过程中应力应变集中明显，变形量较大；同时，材料的损伤和壁厚减薄在翻边区域也比较严重，导致实际成形中翻边区可能出现开裂等缺陷。
With the increasing demand of safety performance, lightweight and energy saving in the automotive industry, low cost hot?rolled high?strength steel parts have been widely used in the automotive wheel manufacturing . In order to tackle the cracking problem occurring in the center hole during the coupled reverse?drawing and flanging process, finite element simulation was carried out. The distribution and variation of the stress and strain when forming the B550CL high?strength steel was calculated and validated by experimental results. The results showed that the stress and strain concentrates severely in the flange area during the coupled forming process, and the deformation of this area is larger than the rest of the part.The damage and thickness reduction in the flanging region is relatively more serious, which may cause defects such as cracking in actual production.
参考文献
| [1] | 童恬.现代乘用车钢制车轮的技术发展[J].汽车工艺与材料,2005(08):1-3,7. |
| [2] | 罗晓晔,赵从容.金属板材的滚压成形[J].机械制造与自动化,2004(03):48-49,52. |
| [3] | ABE Y;MORI K;EBIHARA O .Optimization of the distribution of wall thickness in the multistage sheet metal forming of wheel disks[J].Journal of Materials Processing Technology,2002,125-126:792-797. |
| [4] | TAN C J;MORI K;ABE Y .Forming of tailor blanks for increase in wall thickness at corner of stamped high strength steel products[J].Journal of Materials Pro-cessing Technology,2008,202:443-449. |
| [5] | 高蔚然,方刚,张小格.钢制车轮轮辐冲压成形的有限元模拟[J].锻压装备与制造技术,2010(03):45-49. |
| [6] | K. Mori;Y. Abe;O. Ebihara .Prevention of shock lines in multi-stage sheet metal forming[J].International Journal of Machine Tools & Manufacture: Design, research and application,2003(12):1279-1285. |
| [7] | 纪莲清,谢欢.内孔翻边时变形区应力应变规律研究[J].锻压技术,2007(01):20-23,69. |
| [8] | 邱晓刚,吴晓星,曾庆江,钟鸣.微型汽车轮辐零件翻边成形仿真[J].计算机辅助工程,2011(02):20-23. |
| [9] | 邱晓刚,吴晓星,曾庆江,钟鸣.微型车轮辐零件翻边成形的工艺改进[J].锻压技术,2011(01):39-42. |
| [10] | FRACZ W;STACHOWICZ F;TRZEPIECHN T .In-vestigations of thickness distribution in hole expanding of thin steel sheets[J].Archives of Civil and Me-chanical Engineering,2012,12(3):279-283. |
| [11] | 张立玲.圆孔翻边应力应变分析[J].锻压技术,2002(01):14-16. |
| [12] | 虞松,冯维明,王戎.金属韧性断裂准则的实验研究[J].锻压技术,2010(01):121-124. |
| [13] | TAKUDA H;MORI K;HATTAN .The application of some criteria for ductile fracture to the predication of forming limit of sheet metal[J].Journal of Materials Processing Technology,1999,95(1/3):116-121. |
| [14] | 余心宏,翟妮芝,翟江波.基于Oyane韧性断裂准则的板料成形极限预测[J].材料科学与工艺,2009(05):738-740. |
| [15] | 黄建科,董湘怀.金属韧性断裂准则的数值模拟和试验研究[J].材料科学与工艺,2010(04):450-454. |
| [16] | 刘志云,何成宏,杨国泰,黄菊花.锥状凸模圆孔翻边的应力应变分析[J].锻压技术,2004(02):23-26. |
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