About the Grinding of Gear Hob’s Rake Face

Abstract The most simple and robust construction of the monolithic gear hobs present a common helical rake face for given line teeth, whose generatrix is straight-line segment perpendicular to hob’s axis while its directory helix, pitch helix. As consequence, constructive angles are zero on all edges. Total curvatures such surface negative. Thus, it can be grinded only using conical platter type grinding wheel, or bit. Despite this, some industry practices, possibly reasons simplicity cost lowering, involve plain surface, supposed motion. This paper deals with CAD-simulation process wheel shows differences between theoretical real obtained surface.