Function-oriented filtering for evaluation of tooth flank roughness: Rethinking selection of the cut-off wavelength

Tuesday, 3 December, 2024
10:00 10:30

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Image: ©RWTH Aachen University

Online seminar: FVA 669 IV research project

The surface roughness has a significant influence on the operating behavior in tooth flank contact. In addition to noise generation and efficiency improvements, reducing the surface roughness is particularly beneficial for the tooth flank load capacity. Preliminary investigations have also shown that the surface waviness (commonly removed via filtering operations) also has an influence on the development of tooth flank damage. Function-oriented separation of the roughness profile from the primary profile is not included in current standards, as filtering parameters are selected based on the amount of roughness, independent of the contact conditions in rolling contact.

Therefore, this webinar is based on the core question of the wavelength at which the primary profile should be separated into a roughness profile and a waviness profile from a functional perspective. Targeted separation of the roughness profile from the primary profile makes it possible to extract only the wavelengths that influence the stress in the contact zone of the rolling contact at micro level. The aim of the recently completed research project was to develop a guide for the function-oriented selection and parameterization of filters for evaluating the tooth flank roughness. This was based on the working hypothesis that function-oriented separation of the measured profile into a roughness profile and a waviness profile is possible, depending on the contact conditions in the rolling contact.