热冲压工艺对6061铝合金U型件成形质量的影响

发布时间：2018-06-15 07:30

本文选题：铝合金 + 热冲压　；参考：《中国有色金属学报》2016年06期

【摘要】：利用有限元分析软件MSC.Marc,研究板料初始温度、压边力、保压时间等工艺参数对制件厚度、回弹的影响规律,并通过6061铝合金板材热冲压实验验证仿真分析的可靠性。结果表明:板料热冲压初始温度在465~565℃范围内变化时对该制件厚度分布和回弹量的影响不大;压边力对制件成形质量影响明显,本工况下选用3 k N较为合适;兼顾制件保压结束时刻的温度以及最终的回弹量,保压时间选择5 s左右比较合适。进一步开展成形制件热处理后的力学性能测试分析,并与常规固溶淬火-时效热处理后的6061-T6铝合金进行比较,发现热冲压制件的力学性能并未弱化,且同一热冲压制件不同位置硬度差异在10%以内。
[Abstract]:By using the finite element analysis software MSC.Marc, the influence of the process parameters such as the initial temperature of sheet metal, blank holder force and holding time on the thickness and springback of the sheet metal is studied. The reliability of the simulation analysis is verified by the hot stamping experiment of 6061 aluminum alloy sheet. The results show that the initial temperature of hot stamping has little effect on the thickness distribution and springback, and the blank holder force has obvious influence on the forming quality, and 3 KN is more suitable under this working condition. Taking into account the temperature at the end of the part holding pressure and the final springback, it is more appropriate to choose the holding time about 5 s. The mechanical properties of forming parts after heat treatment were further tested and analyzed, and compared with 6061-T6 aluminum alloy after conventional solution quenching and aging heat treatment. It was found that the mechanical properties of hot stamping parts were not weakened. And the hardness of the same hot stamping parts in different positions is less than 10%.
【作者单位】：中南大学机电工程学院;中南大学高性能复杂制造国家重点实验室;
【基金】：湖南省自然科学基金资助项目(13JJ2009)~~
【分类号】：TG306

【相似文献】