OPTIMIZATION OF DRESSING PARAMETERS FOR GRINDING TABLET SHAPE PUNCHES BY CBN WHEEL ON CNC MILLING MACHINE

The dressing regime parameters in the process of grinding are the most important enabling factors that need to be determined. In this study, the influences of the dressing parameters including the depth of dressing cut, the rate of dressing feed and the speed of grinding wheel on the surface roughness when grinding tablet shape punches by CBN wheel on CNC milling machine are investigated. Taguchi technique and analysis of variance (ANOVA) have been applied to identify the impact of dressing regime parameters on the surface roughness. The results show that the impact level of the cutting depth (aed), the wheel speed (RPM), the feed rate (Fe) and errors on surface roughness (Ra) are 52.63%, 28.45%, 6.59% and 12.33% respectively. By analyzing the experimental results, optimum dressing parameters with the cutting depth of 0.02 mm, the wheel speed of 1000 rpm and the infeed rate of 400 mm/min have been determined, that allow to get the best surface roughness.