Orderly-micro-grooved pcd grinding wheel and method for making same

A grinding wheel, comprising:

• a wheel hub;
• a polycrystalline diamond (PCD) film;
• a plurality of micro-grinding units;
• and
• a plurality of microgrooves;
• wherein an outer circumferential surface of the wheel hub is deposited with the PCD film;
• the plurality of micro-grinding units and the plurality of microgrooves are orderly distributed on a whole outer circumferential surface of the PCD film;
• the plurality of micro-grinding units form a part of the PCD film;
• and the plurality of microgrooves are spaced apart by the plurality of micro-grinding units;
• each of the plurality of microgrooves and each of the plurality of micro-grinding units both have an axial length equal to a thickness of the grinding wheel;
• the micro-grinding units each comprise two side surfaces and an outer surface;
• the microgrooves each comprise two side walls that form one of the two side surfaces of two adjacent micro-grinding units, respectively;
• and
• the micro-grinding units each have a rake angle that is positive.