Speed-changing gear manufacturing apparatus

For the purpose of providing a speed-changing gear manufacturing apparatus capable of forming back-tapered spline teeth having a chamfer at the tip with high accuracy, by forming both side faces of spline teeth in back-tapered shape and forming the tip in chamfered shape at a time, the present inven...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NISHIGORI SAKAE, OKUMURA TADASHI
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:For the purpose of providing a speed-changing gear manufacturing apparatus capable of forming back-tapered spline teeth having a chamfer at the tip with high accuracy, by forming both side faces of spline teeth in back-tapered shape and forming the tip in chamfered shape at a time, the present invention is a speed-changing gear manufacturing apparatus comprising dies formed at regular intervals on a circumference, to enable to move a plural number of spline teeth forming units for forming back-tapered spline teeth on lines extending radially from the center axis of the gear material, and a pressing member for moving the spline teeth forming units toward the center axis of the gear material, by pressing the outer circumferential face of the spline teeth forming units of the dies, wherein said spline teeth forming units are constructed in a way to form an open space in which to form both side faces of spline teeth in back-tapered shape and form the tip in chamfered shape at a time, in contact with the adjacent spline teeth forming units and between two adjacent spline teeth forming units, by moving the spline teeth forming units toward the center axis of the gear material.