Machine bed, method for the operation of a forming machine and forming installation

A machine bed for a forming machine, said machine bed comprising a bed body with at least one support surface for supporting at least one forming device of the forming machine, the bed body comprising a bed plate with a ground side, a continuous surface and at least one bed wall which extends axially therefrom, said machine bed further comprising at least one pretensioning unit, said at least one pretensioning unit cooperates with the bed body in such a manner that said bed body is acted upon with lateral pretensioning which reacts to an input of force into the bed body brought about by and during the operation of the forming device and brought about by the operation of the forming device,

• wherein the at least one pretensioning unit comprises first pretensioning elements which extend laterally on and along an outer surface of the bed plate of the bed body,
• wherein the at least one pretensioning unit further comprises at least two internal second pretensioning elements which are embedded at least in part into the bed body, said at least two internal second pretensioning elements are guided in the bed body so as to be crosswise to each other,
• wherein the second pretensioning elements are arranged parallel to the continuous ground side surface of the bed plate;
• wherein both the first pretensioning elements and the second pretensioning elements are arranged to act on the bed body with lateral pretensioning in a plane parallel to the continuous ground side surface of the bed plate.