| 摘要 |
PURPOSE:To easily exchange a grinding wheel, by removably setting through a mounting plate divide piece a solid grinding wheel to a section divided by a line crossing a center part or an internal circle on the surface of a surface plate, in the case of a surface grinding device equipping a circular or annular lapping disc. CONSTITUTION:A lapping disc 1 is formed by mounting by a screw a plurality of solid grinding wheels 4 of almost sector shape to a center holed lapping surface plate 2 through a mounting plate divide piece 3. A clearance 3a radially formed between the solid grinding wheels 4 discharges polishing dust and/or fall- off abrasive dust to the outside. Here the mounting plate divide piece 3, formed in a plane-shape equal to that of plural sections formed by dividing the lapping surface plate 2 by plural imaginary lines crossing its center, provides interchangeability, forming respectively two screw holes. This mounting plate divide piece 3, on which the solid grinding wheel 4 in an equal shape to the divide piece 3 is piled by aligning a screw hole 4a to the screw hole of the mounting plate divide piece 3, is mounted to the surface plate 2 by inserting the screw into the screw hole 4a. |
