Research Topic
| Short Title | Impact of Tolerances |
| Start of Project | Q1/2025 |
| Funding | FVA-Nr. 1062/I Research Association for Drive Technology, FVA |
| Contact | Dr.-Ing. M. Otto |
Project Description
The operational behavior of cylindrical gears in the overall gearbox and its variation is not only determined by load-related misalignments of the overall system and the manufacturing deviations of the individual tooth flanks of the gears itself. Geometric manufacturing deviations of housing bearing seats, fitting bores, shaft shoulders, wheel bodies and rolling bearings also have a considerable influence.
In order to be able to take into account and to calculate the system’s tolerance chain, the STIRAK and RIKOR tooth contact analyses are to be methodically expanded as part of this project to enable a more precise calculation.
Geometric characteristics scatter in different ways, which is made possible by considering different distribution functions in the calculation approach.
Variant calculations with sensitivity analyses will be used to determine how deviations interact with each other and which types of deviation are relevant for NVH behavior, efficiency and stress behavior. This allows targeted tolerance adjustment and consideration of these deviations in the early design phase.
An iterative first approach for designing transmission system tolerances that integrates production-related boundary conditions offers economic and ecological advantages. In this way, geometric tolerance limits of non-critical tolerance features can be extended. As a result, resources can be saved by avoiding unnecessary processes.
The examination of two example cylindrical gears from the industrial and automotive sectors enables a direct transfer of knowledge to the industrial sector.