Method and apparatus for producing a hollow body

摘要

Automobile hoods and doors etc., in the form of hollow bodies, are manufactured by a method in which at least two panels, preferably of sheet steel, are held tightly together along an at least almost closed line and are formed into the hollow body with the aid of an internal high-pressure forming process. The panels are forcibly joined together. The joining process may be carried out before, during and/or after forming. Also claimed is equipment for carrying out the process comprising an upper tool (4) attached to a ram (2) which can move up and down and a lower tool (5), fastened to a press table (3), in which a supplementary tool is integrated. A lance (7) supplies pressure medium into the a between the sheets (12, 13).