RETRACTED: Modal analysis and simulation on effect of correction factor (cf) in spur gear tooth profile

Abstract

This work is to investigate the effect of correction factor on tooth contact strength, bending strength and basic performance parameters of spur gears. The basic requirement of gear-tooth geometry is the ability to transmit motion in a constant angular velocity ratio at all times. We know that the most gears are made by milling, hobbing or tooth forming. In any case the idea is to generate the tooth form on the work piece by replicating that on the cutter. Now when the cutter (profile generator) is moved away from the center of the work piece, it gives rise to a profile stronger at the base and weaker at the tip. This is positive gear correction. Whereas when the cutter is moved towards the workpiece center it results in negative correction. Negative correction results in tooth undercutting thus reducing strength at the tooth base. 3D model of gear tooth has been modeled with different correction factor and face contact model of teeth method is used for finite element method (FEM) are used together to conduct loaded tooth contact analyses. Deformation and stress calculations of spur gears with different correction factor and contact ratios are done. Contact stress and bending stress for gear and pinion are found and compared for different correction factor. Effects of correction factor and contact ratio on gear strength and basic performance parameters are also discussed.

Keywords: Spur gear tooth profile, Gear correction factor, Positive and Negative correction of spur gear