アルミナセラミックスの被研削性に関する研究(第1報) : ダイヤモンド砥石およびクラスタホイールによる研削面性状

概要

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In this study, alumina ceramics are ground with vitrified diamond wheel and cluster wheel, which is a metal disc mounted with a cluster that is a small piece removed from the diamond wheel. The grindability on surface roughness, grinding force and chipping are experimentally investigated. The results obtained are as follows. Ground surface of alumina ceramics that contain more than 99 % Al_2O_3 are mostly occupied by transgranular or intergranular fractures, but those less than 99 % Al_2O_3 are approximately half by plastic flow. In three dimensional roughness curve, large variation of interval between surface roughness curves means poor grindability. Therefore surface roughness measured along grinding direction is suitable to evaluate grindability of ceramics. When grain size of ceramics becomes large, chipping and surface roughness increase but grinding force decreases. Other ingredients, impurities, additives and firing condition have effects on surface roughness and grinding force.
公益社団法人精密工学会の論文
1990-03-05