Table group for a machine tool

A table group for a machine tool configured to rest on a horizontal reference plane, the table group comprising:

• a support assembly comprising a support comprising an annular wall delimiting an inner compartment;
• a table supported by the support assembly, rotationally about a vertical rotation axis;
• a main biasing portion provided with a lower face and a secondary biasing portion provided with an upper face, the main and secondary biasing portions being jointed to the table;
• a plurality of main hydrostatic skids, fixed to the support assembly, adapted to support the table by means of a pressurized fluid, generating a lifting action, each main hydrostatic skid of the plurality of main hydrostatic skids being configured to form a main pressure chamber with the lower face of the main biasing portion, in which a meatus supporting the table is formed;
• a detection device adapted to detect the lifting action generated by the main hydrostatic skids;
• a plurality of dogs fixed to the support assembly, adapted to push the table towards the main hydrostatic skids by means of the pressurized fluid, generating a contrasting action, wherein each dog of the plurality of dogs comprises a secondary hydrostatic skid, each secondary hydrostatic skid being configured to create a secondary pressure chamber with the upper face of the secondary biasing portion, in which a meatus pushing the table towards the main hydrostatic skids is formed;
• and
• an electronic management device operatively connected to the main hydrostatic skids, the dogs and the detection device, configured to control the dogs to generate a contrasting action such that the lifting action is equal to a predetermined constant nominal load (P*), which is greater than a weight of a semi-finished product and either smaller than or equal to a maximum load (Pmax) which can be borne by the main hydrostatic skids.