Fatigue strength of inner knurled interference fit joined by forming and cutting methods

Lukas Suchy; E. Leidich; A. Hasse; T. Gerstmann; B. Awiszus

doi:10.3221/IGF-ESIS.49.41

Fatigue strength of inner knurled interference fit joined by forming and cutting methods

Authors

Lukas Suchy TU Chemnitz
E. Leidich Chemnitz University of Technology, Institute of Design Engineering and Drive Technology, Germany
A. Hasse Chemnitz University of Technology, Institute of Design Engineering and Drive Technology, Germany
T. Gerstmann Chemnitz University of Technology, Institute for Machine Tools and Production Processes, Germany
B. Awiszus Chemnitz University of Technology, Institute for Machine Tools and Production Processes, Germany

DOI:

https://doi.org/10.3221/IGF-ESIS.49.41

Keywords:

Inversed knurled interference fit, Notch fatigue, Joining by plastic forming, High-cycle fatigue testing, Torque transmission

Abstract

The joining of machine parts by plastic forming is a common method for transmitting forces and torque. In drive trains, the ‘knurled interference fit’ has a high transmission capacity through the combination of frictional connection and form fit. In the present study, the shaft specimen made of C45 steel material is joined with an inner knurled hub made of 16MnCr5 case hardened steel. The influence of the joining process parameters on the torsional fatigue strength of the shaft-hub connection is investigated by means of experimental studies. The most important parameter is the chamfer angle of the knurled hub, which determines the rate of strain hardening in the material and differs between the cutting and forming joining processes. This study shows that knurled interference fit connections joined by forming achieve a higher fatigue strength and a higher maximum static torque than connections joined by cutting.

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Published

27-06-2019

Issue

Vol. 13 No. 49 (2019): July 2019

Section

SI: New Trends in Fatigue and Fracture

License

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Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.

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How to Cite

Fatigue strength of inner knurled interference fit joined by forming and cutting methods. (2019). Frattura Ed Integrità Strutturale, 13(49), 429-434. https://doi.org/10.3221/IGF-ESIS.49.41