Shaving processing method and shaving processing apparatus for gear

A shaving processing method for finishing a tooth surface of a gear in a state where the gear and at least a first shaving cutter are engaged with each other and the first shaving cutter is rotated, the gear comprising a circumference that extends around a central axis of the gear and connects a pair of end surfaces facing each other in a tooth width direction and spaced from each other in a direction of the central axis, the method comprising:

• performing a first shaving step of processing the tooth surface so that a radial dimension of a processing region of material being removed gradually gets smaller as machining performed by the first shaving cutter proceeds from one end surface of the pair of end surfaces toward the other end surface;
• and
• performing a second shaving step of processing the tooth surface so that a radial dimension of a processing region of material being removed gradually gets smaller as machining performed by either the first shaver cutter or a second shaving cutter proceeds from the other end surface of the pair of end surfaces toward the one end surface.