5Kim H S. A. study on cold firging process sequence design of terminal pins tbr high-voltage capacitors [ J]. Journal of Materials Proc.essing Technology ,2007,187:604-608.
6Cao C H, Hua L, Liu S L. Flange forming with combined blanking and extrusion process on sheet metals by FEM and experiments [ J ]. The International Journal of Ad- vanced Manufacturing Technology, 2009,45 ( 3/4 ) : 234- 244.