Method and apparatus for eliminating undulation errors on gear- tooth flanks in production gear-fabricating machines

摘要

In order to eliminate undulation errors in gear production wherein a generating motion of a gear-tooth flank of a gear fixed to a rotary table corresponding to an involute profile is induced by simultaneously imparting a predetermined rotary motion and a predetermined translatory motion to the rotary table, a reference ratio of these two speeds is determined, the momentary speeds of the table are measured and a momentary ratio is determined therefrom. A difference value is formed between the reference ratio and the momentary ratio. This difference value is first formed for each gear-tooth flank during one revolution and then stored in association with the momentary generating position of the gear and with the momentary stroke position of the gear- fabricating tool and only when the same gear-tooth flank is reached during a further revolution is the adjustment value of the gear- fabricating tool corrected by means of the stored difference values.