Perforated sectional grinding disk

The utility model discloses a perforated sectional grinding disk, which is characterized in that the perforated sectional grinding disk is provided with two grinding faces (3) and a central axis hole (4). The grinding plate is dead joint by a binding layer (2) with a plurality of arc segments (1). The grinding faces (3) are provided with a plurality of perforations (5) which are arranged at certain intervals with each other. The perforations (5) are arranged on the grinding faces (3) which are with concentric circles in the same spacing distance. The utility model has the advantages of easy manufacture, low cost, high dimensional precision of the end-face of the grinding piston ring, and good roughness.