Method of manufacturing pairs of spur gears
AssigneeWerkzeugmaschinenfabrik Oerlikon-Buhrle AG
InventorErich Kotthaus
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Abstract
A method of producing pairs of mating spur gears by cutting tooth gaps with a rotating end cutter head, wherein, in order to manufacture the one spur gear, one of the elements--the spur gear or the end cutter head--carries out an arcuate or circular rolling movement about an axis which coincides or approximately coincides with the gear axis of the other gear, and the other gear is produced by a cutting-in depth or plunge cut operation without any rolling movement.
Claims10
A method of manufacturing a pair of mating spur gear elements by cutting out tooth gaps with an end cutter head element wherein one of two elements--one of said mating spur gear elements having an axis and the end cutter head element having an axis--is mounted on a rolling cradle having an axis, comprising the steps of:
- (I) imparting to the one of said two elements, mounted on the rolling cradle, an arcuate-shaped generating movement,
- (II) (a) arranging and maintaining the axis of the one mating spur gear element being cut parallel to the axis of the rolling cradle, and
- (II) (b) simultaneously arranging and maintaining the axis of the end cutter head element substantially perpendicular to the axis of the rolling cradle during said arcuate-shaped generating movement,
- (III) moving one of the axis of the one mating spur gear element and the axis of the end cutter head element relative to the other axis through said arcuate-shaped generating movement around the axis of the rolling cradle,
- (IV) coinciding the center of the arcuate-shaped generating movement with the center of the other mating spur gear element to be produced, and
- (V) fabricating the other mating spur gear element by a plunge cut operation without any generating movement to produce gear teeth having a straight tooth depth profile in a radial direction.
Dependencies are inferred from the claim text.