The gear shaping process of helical offset non orthogonal face gear is the simulation of the generating motion of helical gear and face gear, and its machining principle is shown in the figure.
Different from the gear shaping processing of spur gear, in the gear shaping process of helical offset non orthogonal face gear, the axis of helical gear shaping cutter is not parallel and intersected with the axis of face gear, and has a staggered angle γ m。
When machining face gear, according to the formation principle of helical gear helix, in addition to cutting motion, circular feed motion, radial feed motion, indexing expansion motion and tool letting motion, the helical gear shaper needs to superimpose an additional rotation to form the helical tooth profile at the same time of cutting motion. That is, when the helical gear shaper cutter feeds a helical lead LS along the axial direction, the helical gear shaper cutter just rotates an additional circle around its axis.