セラミック球の磁性流体研磨の基本特性に及ぼす浮子の支持剛性と加工荷重の影響

概要

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Magnetic fluid grinding has been developed as a new process which can remove materials in the finishing of ceramic balls some fifty to one hundred times more rapidly than the conventionally used lapping process. However sufficient data for the optimum design of the magnetic field have not been obtained. This paper presents experimentally the effects of supporting stiffness of a float and grinding load on removal rate and sphericity. The supporting stiffness of a float is defined as the derivative of magnetic buoyant force Fb of a float with respect to the distance h of a float from magnet. The lower supporting stiffness of a float provides smaller minimum sphericity, and the higher supporting stiffness of a float provides higher removal rate and rapidly decreasing rate of sphericity. Lower grinding load provides smaller minimum sphericity. From these results, the importance of the design of supporting system of a float can be realized in magnetic fluid grinding.
1995-04-25