ABRASIVE DISK Russian patent published in 1994 - IPC

FIELD: grinding tools. SUBSTANCE: abrasive disk has axially located sections for rough grinding and a finishing grinding section positioned in between. The hardness and height ratios of the sections are determined from conditions H₁/H₂≥ 2 and B₂/B₁≥ 2 where H₁ and H₂ is the hardness of the rough and finishing grinding sections respectively; B₁ and B₂ is the height of the rough and finishing grinding sections respectively. The engageable ends of the finishing and rough grinding sections are inclined to the axis of rotation of the disk at an angle α determined from a relation a=90± arctgB₁/D where B₁ is the height of the rough grinding section, D is the disk diameter. EFFECT: improved structure. 1 dwg, 1 tbl