Reduction of tooth wear on asymmetric spur gear through profile correction factors

Abstract

ABSTRACT Surface tooth wear is one of the major causes of tooth failures in gear drives. Boosting tooth wear resistance is a significant research objective for designing high-quality asymmetric spur gears with longer life against wear. The main goal of the present work is to boost the wear resistance of the asymmetric spur gear by changing the tooth shape through profile modification. The proper distribution of correction factor to the pinion and gear is necessary to enhance the gear performance. The asymmetric spur gear with different values of sum of profile correction factors (−0.2, 0 and 0.2) is chosen to evaluate the wear depth. This sum of correction factors is accurately distributed between the asymmetric pinion and gear for attaining balanced sliding velocity at the tip and root, balanced slide to roll ratio at the tip and root, equal bending strength in the asymmetric drive and maximum balanced wear in the face and flank regions of the pinion. The optimum values of the correction factor of the asymmetric pinion and the maximum tooth wear are evaluated for the above four different balanced cases. The calculated tooth wear is lower in the balanced wear method than that in other balanced methods.