ジルコニア仮焼材の切削加工 : 最小表面粗さを得るための最適な仮焼温度および切削条件

概要

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The representative manufacturing process of ceramics involves the steps of cold isostatic pressing of powder, sintering, and grinding for surface finish. The cost of grinding is very high because diamond wheels are necessary for surface finishing. Moreover, surface damage is induced during the grinding process and it reduces the toughness of ceramics. The purpose of this study is to suggest a new manufacturing method of ceramics elements. It is expected to lower the cost and to solve the surface damage problem. Generally speaking, the method consists of cold isostatic pressing, presintering, cutting, and full sintering. The minimum cutting surface roughness is the major determining factor of the presintering temperature and optimum cutting conditions for presintering zirconia ceramics. Specifically speaking, the cutting conditions involve cutting speed, feed rate, depth of cut, nose radius, and rake angle. It was found that the minimum value of maximum surface roughness R_<max> at the cutting surface was 0.9μm. Integrity, pits and flakes of the cutting surface morphology are also examined in this cutting test.
一般社団法人日本機械学会の論文
1993-12-25