Remediation device for inner hole of circular ring type workpiece

The utility model relates to the field of machining, in particular to a circular ring type workpiece inner hole remedying device which comprises a butt joint ring, an extruded piece and an extruding piece which are all in a circular ring shape, the outer side face of the butt joint ring is used for making contact with the inner side face of a workpiece, and the outer side face of the extruded piece is tightly attached to the inner side face of the butt joint ring. The outer side face of the extrusion part and the inner side face of the extrusion part are in conical surface fit, and the extrusion part can push the extruded part to expand outwards. According to the utility model, the extrusion part is adopted to provide pressure required by butt joint for the butt joint ring, the extruded part is pushed by the extrusion part to provide pressure for the butt joint ring, the extrusion part is used as a power source, the extruded part is used as a transmission part, and the force transmitted by the extrusion part