Torsionsbelastete Rändelpressverbindungen - Gestaltung, Ausführung und Auslegung

Shaft-hub connections are a common machine element for the connection and load transmission between rotating shafts. In general shaft-hub connections can be classified in frictional, positive-locking and adhesive bonded types. Knurled interference connections are a special design of shaft-hub connection. They are combining the mechanisms of frictional- and positive locking in one connection type. As a result, this type of connection can be used a.o. to transmit very high torsional loads compared with conventional purely frictional or positive connections. Thus knurled interference connections can be used as an alternative to conventional shaft-hub connections for the ongoing optimization in the powertrain with regard to performance enhancement and lightweight construction. The manufacturing of the connection parts can be carried out with industrial usual workshop equipment and little effort compared to other connection types. For this purpose, the knurls of the specimens used are manufactured using three different knurl manufacturing techniques. Within the scope of the work, extensive experimental investigations are carried out on the static and dynamic torsional moment transfer capability of knurled interference connections. In contrast to previous research, the knurl geometry standardized according to [DIN 82] is modified by an ablation at the knurl tooth tips and an additional fillet in the tooth root area between the knurl teeth. These adjustments reduce the notch effect within the connection and further increase the torsional moment transfer capacity. The removal of the tooth tips can also help to improve the concentricity and the manufacturability of the connection. In addition to the results on the transfer capacity, the lubrication influence, the wear behaviour and the reusability of the connection type is characterized in more detail. Based on the experimental results and additional numerical investigations, the previously existing design concepts for knurled interference connections are extended and modified for practical application, including the use of thin-walled hubs. Overall, the findings and results of this thesis enable a focused and manufacturingoriented design and realization of knurled interference connection. In combination with the extended dimensioning concept, this broadens the basis for the application and acceptance of knurled interference connection.