| Citation: | Wang Lili, Li Dongsheng, Li Xiaoqiang, et al. Die-face compensation algorithm in stretch forming of aircraft skin over reconfigurable compliant tooling[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011, 37(8): 1011-1016,1020. (in Chinese)
|
Two finite element models of a single curvature part, discrete and equivalent models of stretch forming over reconfigurable compliant tooling, were set up. The calculation times, rubber deformations and part shapes in two models were compared. The result shows the equivalent model is reliable and more efficient. To eliminate the influence of springback and the interpolator deformation on the part shape fidelity, a die-face compensation algorithm was proposed based on displacement adjustment method and equivalent model. In the algorithm springback compensation and deformation compensation of interpolator were performed in sequence. This algorithm was applied to compensate the die-faces of a single curvature part and a double curvature part. Finally, the two parts were stretch-formed over compensated die-faces and measured by non-contact three-dimensional measurement techniques. The results show that the shape errors are both within tolerance (±0.5 mm) and meet the requirements. It is proved that the algorithm is effective.
|
[1] 汪华.飞机蒙皮多点成形柔性垫层技术研究[D].北京:北京亚洲成人在线一二三四五六区机械工程及自动化学院,2007 Wang Hua.Research on flexible interpolator technology for aircraft skin stretch forming use reconfigurable tool[D].Beijing:School of Mechanical Engineering and Automation,Beijing University of Aeronautics and Astronautics,2007(in Chinese) [2] Norfleet W A.Algorithms for closed loop shape control[D].Cambridge:Department of Mechanical Engineering,Massachusetts Institute of Technology,2001 [3] Webb R D,Hardt D E.Transfer function description of sheet metal forming for process control[J].Journal of Engineering for Industry,1991,113(1): 44-52 [4] Anagnostou E L.Optimized tooling design algorithm for sheet metal forming over reconfigurable compliant tooling[D]．Stony Brook:Mechanical Engineering,State University of New York,2002 [5] Karafillis A P,Boyce M C.Tooling and binder design for sheet metal forming process compensating springback error[J].International Journal of Machine Tools Manufactures,1996,36(4):503-526 [6] 黄霖,万敏.铝合金厚板时效成形回弹补偿算法[J].航空学报,2008,29(5):1406-1410 Huang Lin,Wan Min.Compensation algorithm for springback in age forming for aluminum alloy thick plate[J].Acta Aeronautica et Astronautica Sinica,2008,29(5):1406-1410(in Chinese) [7] Zhang Q,Wang Z R,Dean T A.Multi-point sandwich forming of a spherical sector with tool-shape compensation[J].Journal of Materials Processing Technology,2007,194(1/2/3):74-80 [8] Gan Wei,Wagoner R H.Die design method for sheet springback[J].International Journal of Mechanical Sciences,2004,46(7):1097-1113
|
Copyright © Journal of Beijing University of Aeronautics and Astronautics
Address: Editorial Department of Journal of Beijing University of Aeronautics and Astronautics, 37 Xueyuan Road, Haidian District, Beijing Post Code: 100191 Email: jbuaa@cqjj8.com
Supported by:
Beijing Renhe Information Technology Co., Ltd.
DownLoad: