MACHINING METHOD FOR VARIABLE GEAR PART OF VARIABLE GEAR RATIO RACK

PROBLEM TO BE SOLVED: To machine a rack product or a rack electrode of a variable gear ratio rack with high accuracy at low cost. SOLUTION: In the machining method for a variable gear ratio rack 20, a reciprocation cutting movement for vertically moving a rack material against a cutting blade of a p...

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Bibliographische Detailangaben
Hauptverfasser:	KATSUNO TATSUYA, ISHIKAWA MASATO, OZAKI HIROSHI, FUNAMOTO MASAMI, MIKAMI YOSHIHISA
Format:	Patent
Sprache:	eng
Schlagworte:	LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS MACHINE TOOLS MAKING GEARS OR TOOTHED RACKS METAL-WORKING NOT OTHERWISE PROVIDED FOR MOTOR VEHICLES PERFORMING OPERATIONS TRAILERS TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To machine a rack product or a rack electrode of a variable gear ratio rack with high accuracy at low cost. SOLUTION: In the machining method for a variable gear ratio rack 20, a reciprocation cutting movement for vertically moving a rack material against a cutting blade of a pinion cutter 10 and cut-in for forwardly/rearwardly moving the rack material against the pinion cutter 10 are imparted using the pinion cutter 10 having the same tooth shape as that of a pinion gear product and a gear hobbing machine. The same relative feed speed as a relative movement speed of the pinion gear product and the rack product in the power steering device is imparted during the reciprocation/rotation movement of the pinion cutter 10 and the right/left movement of the rack material. Thereby, a variable gear ratio rack 20 is made in the rack material. COPYRIGHT: (C)2004,JPO