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10 Taxiarchis Belis and Aristomenis Antodiadis
tool tangential displacement. Considering the above kinematic, two different
hobbing types may be applied according to the direction of the axial feed, the
climb and the up-cut hobbing respectively. In the present paper the tooth’s
profile generation complies with DIN 3972 [1].
Fig. 1 – Basic kinematics and essential parameters of gear hobbing.
2. State of the Art
As mentioned before, wear prediction in gear hobbing is a challenging task
because of the large amount of wear influencing data and the complex
kinematics of the process. Many studies have been published, introducing
different methods for wear determination. These studies can fall under two
categories. The first includes methods based on wear calculation in individual
generating positions [2], [3].These methods are based on the simulated chip
geometry and cutting conditions. Lately, FEM-based methods for wear
determination have been introduced [4]. These methods take into account
occurring stresses in the tool-chip contact areas. Nevertheless a FEM-based
simulation needs a considerable amount of time before it can be realised.
The wear model presented in [2] is used in the present paper,. The
contribution of the proposed method is the precise 3D chips determination