if necessary it is possible to establish multiple preform regions on one blank the forming devices u 1 and u 2 are used to preform the blanks p 1 and p 4 subdivided corresponding to the blank p 2 into a region to be preformed and a region from which to generate the final form of the component each of these forming devices comprises a container filled with a fluid action medium for example water and is equipped with a holding device 2 which holds the blanks p 1 p 4 in their edge regions surrounding an opening of the container 1 thus the blanks p 1 and or p 4 are clamped over the opening so that the action medium may be applied to the surface facing the inside of the container thus the edge of the opening of the container 1 corresponds to the course of the edge of the region v 1 and or region v 2 of the respective processed blanks p 1 and p 4 in contrast to the forming device u 1 in which the blank p 1 is preformed without a counter mold fig7 the forming device u 2 is equipped with a counter mold 3 positioned at a distance to the blank p 4 which is clamped over the opening of the container 1.