Chatter in Gear Hobbing

Publisher Website
Google Scholar
Abstract
This paper describes an investigation into the characteristics of chatter in gear hobbing. The likelihood of chatter occurring was shown to increase with feed-rate, depth of cut and gear diameter; it was also shown to be critically dependent on the material being cut. Chatter was found to be of the regenerative type, occurring in bands of speed in a manner similar to its occurrence in milling operations. On a given machine and for a given gear material, the factor deciding whether chatter would arise was shown to be the magnitude of the mean total chip-width being cut by the flanks of the hob teeth. This magnitude was computed for various machining conditions from a knowledge of the hob and gear geometries, the feed-rate and the depth of cut. The machine's design was considered in terms of the vibration characteristics at the hob-blank interface; the dynamic stiffness of relative motion tangential to the gear blank was shown to be critical. Special techniques were used to derive the associated torsional characteristics of the work-table system experimentally.

This publication has 4 references indexed in Scilit: