Patent ID: 7744447
Filing Date: 2010-06-29
Classification: B24D

Abstract:
1. An abrasive disc comprising: a disc substrate of flexible fiber reinforced resin having a substantially planar annular peripheral portion; plural abrasive chips, each of said plural abrasive chips having an abrasive layer on a planar metal piece and being arranged in said peripheral portion of said disc substrate with a predetermined space; an annular suspension plate interposed between said disc substrate and said plural abrasive chips, said annular suspension plate being in the form of a circular ring made of flexible metal; and an annular elastic sheet placed between said annular portion of said disc substrate and said suspension plate so as to isolate said disc substrate from said suspension plate in order to absorb mechanical shock generated in operation of said abrasive disc, said elastic sheet being in the form of a circular ring; wherein metal stakes are integrally formed on one surface of said metal piece of each of said plural abrasive chips, wherein said suspension plate has through-holes through which said stakes are inserted, and wherein distal end portions of said stakes are deformed so as to clamp said metal pieces to said suspension plate in order to fasten said abrasive chips to said suspension plate.