Patent ID: 6351886
Filing Date: 2002-03-05
Classification: B21H,B21K,B23P,F16H,Y10T

Abstract:
A speed gear manufacturing method, comprising:integrally molding a speed gear section of a speed gear and a clutch spline section of the speed gear by hot or warm forging, the speed gear having an axial line; rough-forming helical speed gear teeth in the speed gear section and an involute spline parallel to the axial line of the speed gear in the clutch spline section; forming the involute spline of the clutch spline section into an involute spline with a back taper and having a chamfer at the tip by cold forging; and finish forming the helical speed gear teeth by cold forging with rolling dies while turning the speed gear teeth around a shaft hole of the speed gear, the shaft hole having been formed with reference to the involute spline with a back taper of the clutch spline section.