Patent ID: 9140351
Filing Date: 2015-09-22
Classification: B23F,F16H,Y10T

Abstract:
1. A method of making a bevel gear with a plurality of teeth each having a load flank and a nonworking flank, each of the nonworking flanks of the bevel gear having an engagement region for engagement when in use with teeth of another similar meshing toothed gear, the method comprising the steps of sequentially: casting a blank from steel to form a round wheel of unhardened material; milling or grinding the round wheel of unhardened material to form on it teeth having outer surfaces; thereafter, without hardening outer and edge regions of the wheel, removing material with high precision from the surfaces of the teeth formed on the round wheel by milling or grinding using a four- or multi-axis method so as to produce lowered surfaces or regions that can no longer make contact with the teeth of the other meshing toothed gear and so as to produce a reduced-area raised inner region that measures 10 to 40 percent of the surface of the respective flank of the respective tooth from which material has been removed; and hardening at least the inner raised regions of the teeth of the round wheel.