为提高TRIP高强度钢板的成形质量，提出通过改变刚性凸模胀形试样宽度来测定板料FLC，并对其进行优选。在此基础上，以盒形件为例，借助数值模拟研究其压边力成形窗口以及最优的压边力变化曲线。结果表明：随着冲头行程的逐步增加，TRIP钢板盒形件的压边力成形窗口高度逐渐减小，成形后期必须严格控制压边力的大小；当采用最优压边力变化曲线时，盒形件成形质量好、变形充分。
In order to improve the forming quality of TRIP high strength steel sheet,the method was proposed to measure the forming limit curve(FLC)of sheet by changing the width of rigid punch bulging specimen,and specimen width was optimized. On this basis,the BHF forming window was established and the BHF curve was optimized with box-shaped workpiece by numerical simulation. The results show that the height of BHF forming window will be decreased with the gradual increase of punch stroke,which indicates that the BHF should be controlled strictly in the last period of forming process. With optimal BHF curve,good forming quality of the box-shaped workpiece is achieved and it deforms adequately.
参考文献
| [1] | 潘玲玲,曾顺民.高强度钢作为汽车轻质材料的应用[J].上海汽车,2005(08):41-43. |
| [2] | 王利,杨雄飞,陆匠心.汽车轻量化用高强度钢板的发展[J].钢铁,2006(09):1-8. |
| [3] | 景财年,王作成.TRIP-相变诱发塑性钢的研究进展[J].特殊钢,2004(04):1-5. |
| [4] | 谭善锟,张亚峰,柴震,潘兴旺,刘建民,谢建平,俞宁峰.高强度冷轧钢板在奇瑞轿车上的应用研究[J].汽车工艺与材料,2003(06):10-14. |
| [5] | 王利,金蕾,夏启,徐祖耀.冷轧TRIP钢的特性及应用[J].汽车工艺与材料,2004(06):72-74. |
| [6] | 刘林虎 .基于压边力设计的高强度钢板成形性能研究[D].上海交通大学,2005. |
| [7] | 罗亚军,郑静风,张永清,何丹农.板料拉深成形过程中的变压边力技术[J].锻压技术,2003(02):21-24. |
| [8] | Youngsuk Kim;youngjin Son .Study on wrinkling limit diagram of anisotropic sheet metals[J].Journal of Materials Processing Technology,2000(1/3):88-94. |
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