セラミックスの精密研削における微粒ダイヤモンド砥石の最適研削条件

概要

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This paper aims to clarify the optimum grinding condition for fine grain diamond wheels in precision grinding of fine ceramics. A series of plunge surface grinding tests on alumina ceramics have been conducted using fine grain diamond wheels with grain size in the range of 2-6 to 5-12 μm. On the basis of these results, the optimum grinding condition has been evaluated from a veiw point of grinding ratio. The main results obtained in this paper are as follows : (1)When the grinding speed does not exceed about 1 800 m/min, the grinding ratio is solely a function of coefficient of grain depth of cut φ_g=(v/V)√<t/D (v; work speed, V; peripheral wheel speed, t; wheel depth of cut, D; wheel diameter) approximately. (2)When φ_g exceeds a critical value φ_<gc>, a transition from attrition to fracture type in the wear mode of diamond wheel occurs. Therefore, the grinding ratio takes a maximum value at the critical condition φ_g=φ_<gc>.The critical value φ_<gc> decreases in proportion to the mean grain diameter of diamond abrasives.
社団法人精密工学会の論文
1992-06-05