GRINDING DISC Russian patent published in 2002 - IPC

FIELD: manufacture of grinding discs by pressing bound abrasive powder material for rough grinding operations. SUBSTANCE: grinding disc has large number of protrusions distributed according to predetermined configuration along its peripheral surface and extended from it, mainly in normal direction, for creating textured working surface of disc. Protrusions are pressed together with grinding disc and they are formed due to placing perforated or textured annular sleeve into press-mold for grinding disc in order to press-in sleeve near peripheral surface of grinding disc. After pressing operation or during next step of grinding, sleeve is removed out of peripheral surface for exposing protrusions restricted by perforations of sleeve. EFFECT: simplified rough grinding operations, minimum excess pressure of disc at grinding operation. 11 cl, 4 dwg _