Transverse cylindrical grinding of a eutectic alloy

Abstract

We report herein on a comparison of the performance of two different grinding wheels (conventional and CBN) in the transverse cylindrical grinding of a eutectic alloy. Three cutting conditions were tested: rough, semi-finishing and finishing. The parameters of evaluation were the cutting force, roughness and wheel wear. The optimal cutting force and roughness values were obtained when grinding with the conventional wheel, due to the superior dressing operation performed under every cutting condition tested. Although the CBN wheel presented the best G ratio values, they were lower than expected owing to the inappropriate dressing operation applied. Excessive wheel corner wear was detected in both wheels, caused by the grinding kinematics (transverse grinding) employed. In terms of cutting force and roughness, the conventional wheel proved to be the better choice under the conditions tested. However, in terms of the G ratio, a cost analysis is crucial to determine whether the differences between the wheels justify the use of the CBN wheel, in which case the dressing operation requires improvement

Evaluation of Diamond Dressing Effect on Workpiece Surface Roughness by Way of Analysis of Variance

“…In grinding, the grinding wheel has to be dressed periodically to restore wheel form and cutting efficiency [1,7]. In diamond dressing, a number of parameters govern the process, including dressing depth, dressing lead/traverse rate, the type of dresser used and number of dressing passes [2,3]. Owing to the significant effects of dressing conditions on the shape and distribution of abrasive grits, which directly affect grinding quality [4,6,8], grinding wheel wear, grinding force and grinding efficiency [9,11,13] the importance of proper dressing of grinding wheels on precision machining cannot be emphasized too strongly.…”