The Experimental Research On The Dressing Of Monolayer Diamond Wheel And The Grinding Of K9 Optical Glass

Monolayer diamond wheels are widely used in machining hard-brittle materials such as K9 optical glass due to high grit protrusion, strong grit-bond adhesion and long tool life, etc. But the application is always limited for the high roughness on the ground surface of the workpiece because the monolayer diamond wheel has an inherent weakness—the distances of the grit tips from the centre of gyration are unequal.To solve this problem, the monolayer diamond wheels should be precisely dressed. In this study, a series of researches were carried out on a new dressing method, namely plate wheel dressing, micro-removing the over-protruded grits through chemical-mechanical effect. Besides, a dressing experiment was carried out on a monolayer brazed diamond wheel. The grinding performance was evaluated through grinding K9 optical glass.The main contents are as follows:(1)Some single grit wearing experiments were carried out with diamond and CBN grits. Through comparing the wearing speeds of diamond grit and CBN grit, the dressing mechanism was analyzed.(2)A plate wheel dressing experiment was carried out on a monolayer brazed diamond wheel. The dressing effect was evaluated through grinding K9 optical glass during the dressing process. The changes of the grits were observed and the quality of the ground surface was measured.(3)A series of grinding experiments were carried out on K9 optical glass using the dressed monolayer brazed diamond wheel. The influence of the grinding parameters on the surface roughness, the surface topography and the subsurface damage was studied. The influence mechanism was analyzed in terms of the maximum undeformed chip thickness to evaluate the dressing effects.