Influence of metal gear tooth geometry on load and wear within metal-polymer gear pairs

Rohrmoser A, Bode C, Schleich B, Hagenah H, Wartzack S, Merklein M (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Applied Sciences MDPI

Book Volume: 12

Article Number: 270

Journal Issue: 1

DOI: 10.3390/app12010270

Abstract

Gear pairs made of the material pairing metal-polymer provide advantages, such as a reduced weight, beneficial damping properties and the possibility to be operated in dry running conditions. However, the service life of the pairing is limited due to wear. The properties of the metallic gearing have a significant influence on the wear behavior of the material pairing. From previous investigations, the influence of the surface topography and the flank hardness of the metal pinion is known. With regard to resource saving and efficient manufacturing of the metal pinion, cold forging offers benefits. Through cold forging, metallic gears for the material pairing can be produced ready-to-use in a process suitable for serial production. In order to enable manufacturing by extrusion, the application of gear radii is necessary. The gear radii significantly affect the extrusion process and the achievable gear properties. However, the influence of gear radii on wear within the metal-polymer material pairing has not yet been investigated. Within this contribution, the influence of the gear radii on the contact behavior as well as the resulting local load and wear of the tooth flank is determined. For this purpose, wear tests with aluminum (AlMgSi1) and steel (16MnCr5) gears with different gear radii within the pairing with polyamide (PA66) gears were performed. It has been shown that the local wear of the tooth flank can be attributed to the local load and that adjusted gear radii lead to a varying load and wear of the metal and polymer gears. Based on the findings, functional relationships regarding the choice of gear radii and the wear behavior are derived which can be applied in the design of cold forged gears.

Authors with CRIS profile

Andreas Rohrmoser Institute of Manufacturing Technology Christoph Bode Chair of Engineering Design Benjamin Schleich Chair of Engineering Design Hinnerk Hagenah Institute of Manufacturing Technology Sandro Wartzack Chair of Engineering Design Marion Merklein Institute of Manufacturing Technology

Related research project(s)

Consideration of functionally relevant geometric deviations in the design of metal forming processes for the production of gears by extrusion FOR 2271: Prozessorientiertes Toleranzmanagement mit virtuellen Absicherungsmethoden (FORTol) April 1, 2016 - March 31, 2023

How to cite

APA:

Rohrmoser, A., Bode, C., Schleich, B., Hagenah, H., Wartzack, S., & Merklein, M. (2022). Influence of metal gear tooth geometry on load and wear within metal-polymer gear pairs. Applied Sciences, 12(1). https://dx.doi.org/10.3390/app12010270

MLA:

Rohrmoser, Andreas, et al. "Influence of metal gear tooth geometry on load and wear within metal-polymer gear pairs." Applied Sciences 12.1 (2022).

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