Design and manufacture of a shaving cutter with unequal depth gashes

Gear shaving is a gear finishing operation with high efficiency and high precision. When a work gear has been shaved by a shaving cutter with a true involute profile, the “mid-concave” phenomena inevitably exist around the pitch points of the work gear tooth flanks. Aiming at this problem, a new-style shaving cutter with unequal depth gashes is designed and manufactured. This paper analyses the forming of the gash on the basis of the slotting principle, and proposes a gash-designing method. Experiment has proven that the shaved gear has a better surface finish that achieves the anticipated effect.