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Abstract

Method of producing a conical or cup-shaped crown wheel which can mesh with a cylindrical pinion with the inclusion of an angle .alpha.. The crown wheel is produced by means of a generating process. The tool (1, 43) consists of a disc (3) which has machining elements (53) disposed on its circumference whose cutting edges lie in the surface of a profile which extends in the form of helical ribs (4) at a pitch angle .gamma. around the circumference of the disc (3), said profile in each cross-sectional plane perpendicular to the helical direction of the ribs (4) being the shape of a number of adjacent cuttting teeth (53), based on the basic geometry of a cylindrical pinion which is characteristic of the crown wheel and the center point of which lies on a circle which is in a plane perpendicular to the rotation shaft of the tool, and has a center point lying on the rotation shaft of the tool. During the generating process the tool (1, 43) is positioned in such a way that the center point (5, 47) of the cutting teeth (53) which are in engagement with the workpiece (20, 38) lies essentially in the plane which is formed by the axis of rotation (22, 39) of the workpiece and the center point of the tool (1, 43) lying on the rotation shaft (2, 46) of the tool and said center point (5, 47) is moved in a straight line which intersects or crosses the axis of rotation (22, 39) of the workpiece (20, 38) with the inclusion of the angle .alpha..

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First Claim