Patent ID: 6085418
Filing Date: 2000-07-11
Classification: B21K,Y10T

Abstract:
An apparatus for sizing the teeth profiles of helical gears comprising:a lower punch on which is placed a gear blank, an upper punch being vertically movable for pressing said gear blank downward, and a sizing die adapted to have inner peripheral teeth thereof engaged with the gear blank pressed by said upper punch to size the teeth profiles of the gear blank; characterized in thatsaid lower punch comprises a first lower punch and a second lower punch, said second lower punch non-rotationally carrying the gear blank placed thereon and said first lower punch being arranged axially rotatable around said second lower punch and provided with outer peripheral teeth thereon, said sizing die being axially rotatable and vertically movable while the inner peripheral teeth thereof are engaged with the outer peripheral teeth of said first lower punch, and said upper punch being arranged axially rotatable and provided with the outer peripheral teeth which come into engagement with the inner peripheral teeth of said sizing die.