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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2009, Vol. 30 ›› Issue (8): 1531-1536.

• 材料工程与制造工艺 • Previous Articles     Next Articles

Prediction of Springback and Tool Surface Modification Technology for Age Forming of Integral Panel

Huang Lin1, Wan Min1, Wu Xiangdong1, Chi Cailou2, Ji Xiusheng2, Li Shanliang3, Zhang Xinjuan3   

  1. 1 Department of Aircraft Manufacturing Engineering, Beijing University of  Aeronautics and Astronautics 2 Technology Reasearch Institute, Shenyang Aircraft Industry (Group) Company LTD 3 Sheet Metal Factory, Xi’an Aircraft Industry (Group) Company LTD
  • Received:2008-06-15 Revised:2008-10-17 Online:2009-08-25 Published:2009-08-25
  • Contact: Huang Lin

Abstract: Age forming technique has been developed to manufacture integral wing-skin panel components. A method of accurately predicting springback and modifying tool surface to eliminate the effect of the springback on forming precision should be developed, since huge amount of springback is a characteristic of this forming technology. This article uses finite element method (FEM) to analyze the age forming process of gridtype high flange integral panels, and test results show that FEM analysis results are reliable. Based on the FEM prediction of springback, a tool surface modification algorithm is developed for the age forming of integral aluminum panels. This algorithm is used in tool surface modification for the age forming of a complex high flange integral panel part. After 9 iterations, the maximal shape error of the panel part is reduced to below 0.4 mm. Its advantages of high precision and fast convergence rate have been confirmed.

Key words: integral panel, age forming, finite element method, springback, die design

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