Positioning and adjusting device for lathing of large mechanical parts

The utility model relates to the technical field of machining, in particular to a positioning and adjusting device for turning of large mechanical parts, which improves flexibility and machining efficiency. Comprising a base, two supporting plates, two rotating shafts, a working circular table, two connecting rods, a bottom plate, a first servo motor, rotating shafts, a disc, a bearing, a lead screw, two polished rods, a connecting block, a second servo motor, a telescopic rod and two clamping mechanisms, a groove is formed in the top end of the base, the bottom ends of the two supporting plates are connected with the top end of the base, and the rotating shafts are installed at the left end and the right end of the working circular table; the two rotating shafts are rotationally connected with the close ends of the two supporting plates correspondingly, a circular groove is formed in the top end of the working circular table, an annular sliding groove is formed in the inner wall of the circular groove, an an