Transactions of Materials and Heat Treatment

Title：Numerical simulation and experiment on the hydroforming for double curved aircraft aluminum alloy skin

Authors： Wang Ling Wu Yongkun Zhang Jianmin Lang Lihui Zhang Chun Chi Cailou

Unit： Shenyang Aircraft Industry (Group) Co. Ltd. Beihang University Tianjin Tianduan Press Co. Ltd.

KeyWords： hydroforming springback aluminum alloy sheet double curvature skin numerical simulation

ClassificationCode：TG394

year,vol(issue):pagenumber：2017,42(6):169-173

Abstract：

For a aircraft skin part, two kinds of schemes as active hydroforming and passive hydroforming were numerically simulated and comparatively analyzed by the finite element analysis software Dynaform. According to the numerical simulation results, the above part was suitable for the active hydroforming. Then, the maximum reduction of parts was effectively controlled by modifying the addendum surface and optimizing the parameters in forming process. At the same time, a certain amount of thinning of the sheet was ensured to make the sheet metal into plastic deformation, thereby the springback is effectively reduced. Then, according to the analysis and the calculation results of springback, the springback of die surface was compensated by the software Think Design , and the springback quantity was controlled within the qualified range. Finally, the accuracy and applicability of the numerical simulation were verified by the experiment, and qualified parts with good surface quality and high accuracy were formed.

Funds：

国家科技重大专项（2014ZX04002041）

王玲（1973-），女，学士，研究员

Reference：

［1］郎利辉，谢亚苏，王永铭.飞机大型复杂双曲度蒙皮充液成形数值模拟及实验研究[J].精密成形工程，2011，3(6)：112-116.

Lang L H，Xie Y S，Wang Y M.Aircraft large complex double curvature skin hydroforming numerical simulation and experiment research [J]. Journal of Netshape Forming Engineering，2011，3(6)：112-116.

［2］Hartl C.Research and advances in fundamentals and industrial applications of hydroforming[J].Journal of Materials Processing Technology，2005，167(2/3)：383-392.

［3］郎利辉，张士宏，康达昌，等.板液压成形及无模充流拉深技术[J].塑性工程学报，2002，9(4)：29-34.

Lang L H，Zhang S H，Kang D C, et al. About sheet hydroforming and hydromechanical deep drawing without draw die[J].Journal of Plasticity Engineering，2002，9(4)：29-34.

［4］Nakamura K, Nakamura T. Sheet metal forming with hydraulic counter pressure in Japan [A]. CIRP AnnalsManufacturing Technology [C]. Beograd, 1987.

［5］Lang L H, Zhang S T, Li T, et al. Investigation into the forming of complicated parts with poorformability materials in cold/warm sheet hydroforming[A]. Tube Hydroforming Technology[C]. Harbin, 2007.

［6］李奇涵，刘海静，李笑梅，等.基于Dynaform的汽车顶盖冲压成形回弹模拟及回弹补偿[J]. 锻压技术，2015，40(10)：16-19.

Li Q H, Liu H J, Li X M, et al. Springback simulation and compensation of car roof stamping based on Dynaform[J].Forging & Stamping Technology, 2015，40(10)：16-19.

［7］Livatyali H, Wu H C, Altan T. Prediction and elimination of springback in straight flanging using computeraided design methods: Part 2: FEM predictions and tool design[J]. Journal of Materials Processing Technology, 2001, 117(1):262-268.

［8］丁少行，李晓星，孙志莹，等.钛合金蒙皮拉形数值模拟与试验[J]. 锻压技术，2014，39(7)：24-29.

Ding S X, Li X X, Sun Z Y, et a1. Numerical simulation and experimental of stretch forming for titanium alloy skin[J]. Forging & Stamping Technology, 2014，39(7)：24-29.

Service：

【This site has not yet opened Download Service】【Add Favorite】