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Abstract

A method and apparatus for the rolling drive of a gear grinding machine. The rotation portion of the rolling movement of the workpiece is effected by roll bands, which at one end are secured to a roll-band carriage movable back and forth with respect to the workpiece axis and at the other end are secured to a roll cam and roll onto and off therefrom. The roll cam and the workpiece are supported on a roll-cam carriage movable back and forth parallel to the roll-band carriage. The roll-band carriage and the roll-cam carriage can be driven at a substantially phase-equal movement. The relationship between the stroke of the roll-band carriage and the roll-cam carriage can be adjusted corresponding with the difference between the diameter of the roll cam and of the workpiece. To control the drive of the roll-band carriage, on the one hand the path covered above ground by the roll-cam carriage and on the other hand the distance between the roll-cam carriage and the roll-band carriage is determined in intervals, the relationship between these two values is calculated and is compared with a desired value corresponding with the adjusted stroke relationship, and the drive of the roll-band carriage is corrected corresponding with a determined deviation.

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First Claim