| 摘要 |
PURPOSE: To provide an abrasive capable of compatibly achieving the high grinding speed and the excellent grinding precision, and a grinding method using the abrasive. CONSTITUTION: An abrasive has the composition consisting of, by weight, 85-50% matrix of polyurethane resin whose Shore hardness specified by ASTM-D2240 is D60-83, and 15-50% abrasive grains diffused in the matrix, the expansion ratio being 2-17 times. The abrasive is stuck to an upper surface plate 1 and a lower surface plate 2, and used to grind each face of a work 5 to be ground which is stored in a hole of a carrier 4 between the surface plates. |
