Multi sheet hydroforming of complicated thin wall part and numerical simulation

作者：Li Tao^*; Lang Lihui; An Dongyang; Wang Ling

来源：Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(7): 830-833.

• Cavity pressure
• Multi sheet hydroforming
• Numerical simulation

Sheet hydroforming has proven to be an effective method for manufacturing complicated parts. The multi-sheet hydroforming technology of complicated thin wall aerocraft part was investigated. Effects of key process parameters including the shape of pre-forming punch, corresponding pre-forming depth, and cavity pressure on the forming process of the finally formed parts were explored in multi-hydrodynamic deep drawing by using the finite element numerical simulation methods. Failure types including fracture and wrinkling during sheet hydroforming were discussed. The successful region of the maximal cavity pressure was provided during the forming process of the final formed parts. The measures of controlling forming quality were presented, and process parameters were optimized. According to the results of the numerical simulation, the experimental confirmations were carried on by using the equipment of sheet hydroforming which had been developed independently. It is shown that the results from the simulation are in reasonable agreement with those from experiment.

• 出版日期2007
• 单位北京大学