A process is disclosed for producing hollow bodies composed of at least two shell-like individual parts. The individual parts are produced in pairs in the subsequent joining position, are brought together in this joining position to the assembly station and are linked together preferably by punch riveting or by capacitor discharge welding. Depending on the size of the individual parts, they may be produced and joined in a single shaping and joining device. The larger individual parts are produced in a separate device then joined in a joining device.