Abstract
Abstract Gear hobbing is an efficient method of gear manufacturing. Due to the fact that during the cutting process, every hob tooth always cuts in the same generating position, where the formed chip has different geometry, the resulting tool wear is not uniform on any particular hob tooth. In order to overcome this problem, the hob is shifted tangentially after a certain number of cuts. The optimum selection of the shift displacement and the number of gears (shift amount), after which the hob has to be shifted, leads to a uniform tool wear and consequently increases the amount of the hobbed gears per tool regrinding, until the maximum permitted tool wear is reached. In the present paper, an experimentally verified computational procedure is presented, which enables the determination of optimum values for the shift displacement and for the corresponding shift amount, by considering the wear behaviour of the hob teeth in the individual generating positions.
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