uploaded by kelly on Dec 18, 2007.

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Description: in that a hemispherical recess is formed in the die in the region of the transition of the passage into the end face, with the ball diameter of the hemispherical recess corresponding to the ball diameter of the desired spherical formation of the bolt element, in that a tool with a likewise hemispherical recess is pressed onto the free end of the cylindrical blank projecting out of the die and the die and the tool are brought into contact with one another in order to reshape the end of the cylindrical blank projecting out of the die to the spherical formation by cold deformation.