1JESWIET J, GEIGER M, ENGEL U, et al. Metal form- ing process since 2000 [ J ]. CIRP Journal of Manufac- turing Science and Technology,2008 (1) :2 -17.
2TOLAZZI M. Hydroforming applications in automotive: A review [ J ]. International Journal of Material Form- ing,2010,3 ( S1 ) :307 - 310.
3BOLAYC, LIEWALD M. Enhanced process for double sheet hydroforming [ C ]//International Conference on Hydroforming of Sheets, Tubes and Profiles. [ S. 1. ] : [S. n. ] ,2010:137 - 158.
4HEIN P, VOLLERTSEN F. Hydroforming of sheet met- al pairs [ J ]. Journal of Materials Processing Technolo- gy, 1999,87 : 154 - 164.
5HEIN P, GEIGER M. Advanced process control strate- gies for the hydroforming of sheet metal pairs [ C ]// Advanced Technology of Plasticity, Proceedings of the 6th ICTP. [ S. 1. ]: [ S. n. ], 1999.19 - 24.
6WAGNERS, KNORZER F, KAPPES J, et al. Die con- cepts for sheet hydroforming of low volumes [ C ]// In- ternational Conference on Hydroforming of Sheets, Tubes and Profiles,[ S. 1. ] : [ S. n. ] ,2010. 159 - 174.
7NOVOTNY S, HEIN P. Hydroforming of sheet metal pairs from aluminum alloys [ J ]. Journal of Materials Processing Technology ,2001,115:65 - 69.
8OH S, JEON B, KIM H, YANG J. Applications of hy- droforming processes to automobile parts [ J ]. Journal of Materials Processing Technology,2006,174 (1/2/3): 42 - 55.
9ASSEMPOUR A, EMAMI M R. Pressure estimation in the hydroforming process of sheet metal pairs with the method of upper bound analysis [ J ]. Journal of Materi- als Processing Technology ,2009,209:2270 - 2276.
10GEIGER M, MERKLEIN M, COJUTYI M. Hydroform- ing of inhomogeneous sheet pairs with counterpressure [ J]. Production Engineering,2008,3 ( 1 ) : 17 - 22.
