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 the 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.