热冲压工艺对6061铝合金U型件成形质量的影响
发布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新时间：2016-07-05
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。
热冲压工艺对6061铝合金U型件成形质量的影响Effect of hot stamping process on forming quality of 6061 aluminum alloy U-shaped parts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 kN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。
The factors affecting the thickness and the springback of the parts were investigated including initial blank temperature, blank holder force (BHF) and the holding time using MSC.Marc finite element analysis software. The reliability of finite element simulation was proved by the hot stamping experiments of 6061 aluminum alloy. The results show that sheet metal initial temperature has a little influence on the thickness and the springback when it changes in the range of 465-565 ℃. The influence of BHF on the forming quality of aluminum alloy is obvious. The use of 3 kN is more appropriate. Combined with the temperature and the final amount of springback in the end of the product, the time selection of 5 s is appropriate. The mechanical properties of the forming parts were analyzed, and compared with the conventional solid solution quenched and aged 6061-T6. It is found that the mechanical properties of hot stamping parts have not been weakened, and the hardness of the same hot stamping parts is less than 10%.
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