Profile Modification of Helical Gear Teeth

Abstract

Few investigations are available concerning the profile modification of helical gear teeth and there are many important problems which should be clarified. The object of the present investigation is to find out the effect of the profile modification on the dynamic properties of helical gears, and furthermore to derive the method for determining the optimum amount of profile modification. The profile modification of both non-crowned and crowned helical gear teeth was dealt with in this investigation. As the result of the investigation, it was found that the vibration caused by a gear mesh was reduced by giving a suitable profile modification to the teeth, especially with regard to the crowned helical gears, and the optimum amount of profile modification to the teeth of both non-crowned and crowned helical gears could be determined from the tooth deflection under working load, similarly to the case of spur gears.