The utility model discloses a
piston ring finishing
machine which comprises a mounting bracket, a horizontal rubber roller assembled on the mounting bracket through a pair of bearings, a motor in transmission connection with the end part of the rubber roller, a pair of mounting units symmetrically arranged on the mounting bracket, and a supporting
pipe unit of which the two ends are respectively and detachably assembled on the pair of mounting units, the supporting
pipe is parallel to the rubber roller when the supporting
pipe is assembled on the mounting unit, the positioning clamping strip can be assembled on the outer wall of the supporting pipe in a detachable mode at the same length, the rubber roller makes contact with the bottom side of the
piston ring so as to drive the
piston ring to rotate, and the positioning clamping strip is detachably assembled on the supporting pipe. A large number of customized pipes matched with the equipment can be prevented from being customized, and the cost input is reduced; in the using process, only the positioning clamping strip needs to be assembled on the supporting pipe, the
piston ring does not need to be transferred between the supporting pipe and the customized pipe, and the working efficiency is improved.