Study on the Cold Stretch Bending Technology for T8 Al-Li Alloys Profiles
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摘要: 研究了铝锂合金T8状态冷拉弯成形回弹预测及模具补偿修正技术,并进行T和Z截面的2196-T8511和2099-T83铝锂合金型材拉弯成形试验。将模具回弹补偿修正算法应用于拉弯模具修正,回弹补偿后的零件与样板最大间隙为2 mm,证实了T8状态铝锂合金型材拉弯成形的可行性和理论回弹计算及模具回弹补偿修正算法的有效性,这种方法可以用于拉弯成形及模具设计。Abstract: The springback prediction for cold stretch bending of T8 aluminum-lithium alloys profiles and the die correction technique are researched. The stretch bending experiment of 2196-T8511 and 2099-T83 aluminum-lithium alloys profiles with T-section and Z-section is carried out. The present correction algorithm is used for dies of stretch bending. Its maximum error is 2 mm. The results show that cold stretch bending of T8 aluminium-lithium alloys profiles is feasible and the algorithms of springback prediction and compensation are effective. It can be taken as a reliable approach for stretch bending and die design of T8 aluminum-lithium alloys profiles.
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Key words:
- aluminum-lithium alloy /
- bending dies /
- cold stretch bending /
- die correction
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