The Constructive Geometry of the Hobbing Tools for Continuous Sharpening

Abstract

Modern variety of “Fredascon” gear hob, profiled through continuous sharpening, provide the accuracy in processing of gear pinions profile, in the terms of preserving the advantages results through tooth shifting. Tooth profiling through continuous sharpening tool remove the possibility to utilize machine of relief milling. In this paper the proposed gear hob cutter permit the assembling of a sharpening tool, with the cutting edge placed in such a way to control the decrease of irregularity caused by teething and increase the precision of gear pinions process.
The paper presents the calculus relations of the passive angle of the hob-tool teeters, in the case of continuous grinding of their active, in assembly estates.