7075铝合金蠕变时效成形工艺参数对回弹的影响
Influences of Process Parameters on Springback of 7075 Aluminum Alloy During Creep Age Forming
摘 要
对7075铝合金进行了蠕变时效成形试验，通过正交试验分析了时效温度、保温时间和模具半径等工艺参数对该铝合金蠕变时效成形后回弹的影响。结果表明：蠕变时效成形工艺参数对回弹的影响程度由大到小的顺序为时效温度、保温时间、模具半径；当时效温度为190 ℃、保温时间为15 h、模具半径为300 mm时，7075铝合金成形效率最高，回弹率最小，为29.43%；在其它工艺参数一定时，回弹率随时效温度的升高而降低，随保温时间的延长先快速下降然后逐渐趋于稳定。
7075铝合金
正交试验
回弹率
creep age forming
7075 aluminum alloy
orthogonal experiment
springback rate
Abstract
The creep age forming experiment of 7075 aluminum alloy was conducted, and the influences of aging temperature, aging time and die surface radius on springback of the aluminum alloy after creep age forming were analyzed by orthogonal experiments. The results show that the creep age forming parameters listed in descending order of effect on the springback was aging temperature, aging time and die surface radius. With the aging temperature of 190 ℃, aging time of 15 h, and die surface radius of 300 mm, the best forming efficiency was obtained, and the springback rate reached the minimum value of 29.43%. With the other process parameters constant, the springback rate decreased with the increase of aging temperature and first decreased rapidly then tended to be stable with the increase of aging time.
中图分类号 TG306 DOI 10.11973/jxgccl201512002
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(51375220)
收稿日期 2014/10/15
修改稿日期 2015/9/11
网络出版日期
作者单位点击查看
备注刘大海(1981-)，男，河南泌阳人，副教授，博士。
引用该论文: LIU Da-hai,XIE Yong-xin,LI Jun-chu,ZONG Chong-wen. Influences of Process Parameters on Springback of 7075 Aluminum Alloy During Creep Age Forming[J]. Materials for mechancial engineering, 2015, 39(12): 5～8
刘大海,谢永鑫,黎俊初,宗崇文. 7075铝合金蠕变时效成形工艺参数对回弹的影响[J]. 机械工程材料, 2015, 39(12): 5～8
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【4】HOLMAN M C. Autoclave age forming large aluminum aircraft panels［J］. Journal of Mechanical Working Technology, 1989, 20:477-488.
【5】JEUNECHAMPS P P, HO K C, LIN J, et al. A closed form technique to predict springback in creep age forming［J］. International Journal of Mechanical Sciences, 2006,48(6):621-629.
【6】蒋建辉，郑子樵，唐娟，等.单级时效7056铝合金的显微组织与性能［J］.机械工程材料，2013,37(4):69-74.
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【10】SPIGARELLI S, MEHTEDI E M. Microstructure-related equations for the constitutive analysis of creep in magnesium alloys［J］. Scripta Materialia, 2009, 61(7):729-732.
【11】BAKAVOS D，PRANGNELL P B，DIF R. A Comparison of the effects of age forming on the precipitation behavior in 2xxx, 6xxx and 7xxx aerospace alloys［J］.Materials Forum, 2004, 28:124-131.
【12】ZHU A W,STARKEEA．Materialsaspectsofageforming of AlＧxCu alloys [J]．Journal of Materials Processing Technology,2001,117(3):354G358．
【13】KULA E, WEISSV．Residualstressand stressrelaxation
[M]．[Sl．．]:KluwerAcademic/Plenum Publishers,1981．
【14】赵飞.2A12铝合金时效成形的微观组织及力学性能[D].大连 :大连理工大学,2010．
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