Compressor tray positioning tool based on lathe

The utility model relates to the technical field of tool clamps, and discloses a compressor tray positioning tool based on a lathe, which comprises a reference flange connected with a main shaft flange at the outer end of a lathe main shaft, the outer end face of the connecting base is at least provided with three supporting bases which are distributed in the circumferential direction and used for supporting the ends of the eccentric shaft holes in the tray, and the outer end faces of the supporting bases are provided with limiting bosses. A spring chuck which is fixed to the reference flange and used for tightly supporting a center hole of the tray is arranged in the middle of the connecting base, the axis of the spring chuck is coaxial with the axis of the lathe spindle, and a conical column which is driven by a lathe pull rod to move in the axial direction is arranged in the spring chuck. The positioning device has the advantages of being convenient to use, stable in positioning and high in positioning pre