Improvement of Gear Accuracy in Gear Hobbing : 1st Report, A Numerical Analysis of Tooth Profile Errors : Vibration, Control Engineering, Engineering for Industry

Abstract

Accurate gears are needed in order to obtain a high load carrying capacity. This study aims at manufacturing highly accurate gears by hobbing. In this report, a method for the calculation of tooth profile errors, caused by geometrical hob errors such as profile errors of the hob tooth and the eccentricity of the hob, is proposed. From a comparison of the calculated tooth profile errors with the measured ones in hobbing tests, it is found that tooth profile errors generated by geometrical errors and the eccentricity of the hob can be distinguished from those by dynamic errors of the hobbing process, i.e. vibrations, built-up edges and so on. It is proved that the accuracy of this calculation method is sufficient to study the accuracy of hobbed gears.