Influence of wheel-workpiece speed ratio of turn grinding on grinding force and surface roughness

Abstract

Turn grinding is cylindrical grinding with control of the grinding wheel posture. The advantages of turn grinding in comparison with cylindrical traverse grinding are reduction of the grain depth of cut and approach angle. Therefore, the grinding force can be reduced and the surface roughness can be improved because the chip shape becomes thinner. However, when the wheel-workpiece speed ratio is large, the grain depth of cut and the approach angle are too small. Therefore, it is difficult to determine the grinding conditions. This paper investigates the grinding characteristics of turn grinding. The influence of the wheel-workpiece speed ratio on the grinding force and surface roughness were evaluated. The results indicated that the surface roughness tends to improve when the wheel-workpiece speed ratio is decreased with constant wheel peripheral speed, or when both the wheel peripheral speed and the wheel-workpiece speed ratio are increased.