Effects of abrasive tools on surface finishing under brittle-ductile grinding regimes when manufacturing glass

摘要

This paper addresses the effects of bonds and grains of abrasive tools on the edge aspect of ground glasssurface. Diamond grains and silicon carbide (SiC) grains combined with two bond types, i.e., resin andmetal, were considered for this study. The surface edge characteristics were characterized using scanningelectron microscope (SEM) and interferometer observations. In particular, the spectrum of arithmeticmean was investigated for distinguishing the different scales of analysis. Experimental results showedthat the grinding forces vary sensitively with bond type and wheel velocity. Using diamond grains’ wheel,it was found that roughness level obtained with metallic bond is lower than that obtained with resin bond.However, using a resin-bonded wheel, two mechanisms of material removal were revealed according tograins’ type. (i) A partial ductile regime, i.e., ductile streaks and brittle fracture, obtained with diamondgrains, and (ii) a fully ductile regime obtained with SiC grains. Thus, it was found that ground surfaceobtained using SiC grains’ wheel has a better roughness than that obtained using diamond grains wheel.Besides, SiC grains seem to lead to more marked streaks and form defects.