セラミックスの高品位翼型形状研削に関する考察

概要

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Grinding performance of ceramics was experimentally investigated to obtain high quality ground components like a curved surface with small roughness and small residual stresses. An electrolytic/electro-chemical in-process dressing method was applied to very fine grain-size wheels for finishing mirror-like surface with low grinding force, in contour grinding of a blade-shaped silicon nitride with a machining center. The relation between the grain size and the surface roughness of the ground ceramics was found. High quality surface of silicon nitride with a roughness of 0.012 μmRa could be accomplished by using a 10 000-mesh metal-bonded diamond wheel. The X-ray diffraction measurement showed that the surface compressive residual stresses increased with increasing feed rate or with decreasing wheel speed. It was found, however, that there was no effect from the normal grinding force during grinding. It then concluded that the residual stresses decreased with decreasing chip cross sectional area.
公益社団法人精密工学会の論文
1993-05-05