Nihon Kikai Gakkai ronbunshu (Nov 2020)
Quantitative evaluation of grinding wheel surface condition and effect of dressing condition on characteristics of grinding
Abstract
In the grinding process, the difference of the grinding wheel surface condition affects a grinding performance and a ground surface roughness. It is well known that the grinding wheel surface topography is changed by the difference of dressing condition and the self-sharpening. Therefore, to estimate the optimal dressing conditions and/or manage the grinding wheel life, it is required that the relationship between the grinding wheel surface topography and the grinding characteristic is clarified. From such a viewpoint, by the proposed measuring method called a measured focus position recalculation method, the grinding wheel surface shape is measured before and after dressing and groove grinding. This study aims to quantitatively evaluate the relationship between the grinding wheel surface topography, grinding force and ground surface roughness. From experimental results, by extracting only the changed part of the grinding wheel surface shape before and after dressing and groove grinding, it was found that changes in the grinding wheel surface could be evaluated. Moreover, the abrasive grain cutting edge density, the abrasive grain contact area ratio and the successive cutting-point spacing were calculated by measured results of the grinding wheel with dressing lead changed. By these calculated results, it was clarified that the effect of the grinding wheel surface topography of the difference of dressing lead could be evaluated quantitatively. Finally, it was experimentally clarified that the normal grinding force had the same tendency as the contact area per abrasive grain cutting edge, the ground surface roughness had the same tendency as the successive cutting-point spacing.
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