Method for manufacturing grinding wheel having depressions on grinding surface thereof

A method for manufacturing a grinding wheel having depressions on a grinding surface thereof, which comprises a plurality of grinding chips that include a substrate layer and an abrasive grain layer containing superabrasive grains, wherein the grinding chips are adhered to a core mounted to a wheel spindle that is rotatably journalled in a wheel head of a grinding machine, and the grinding surface formed on the abrasive grain layer contacts with a workpiece, which is rotatably supported on a workpiece supporting apparatus of the grinding machine, to grind the workpiece at a grinding point, wherein the method comprising;

• forming the grinding chip before baking in such a manner that a substrate layer formed by mixing substrate grains with bond is overlaid on an inner surface of an abrasive grain layer and is integrally press-molded with the abrasive grain layer to form the grinding chip with an arcuate shape, wherein the abrasive grain layer is formed by mixing superabrasive grains with the bond;
• forming a plurality of depressions on an abrasive grain layer of the non-baked grinding chip;
• baking the non-baked grinding chips, thereby making baked grinding chips;
• and
• adhering a plurality of baked grinding chips to the core.