Determination of Friction Coefficients of Interstice of a Shaft-Hub-Connection Manufactured by Lateral Extrusion

Abstract:

A combination of several manufacturing process steps in a simultaneous manner allows savings in energy costs, reduced investment and economizing logistical efforts. In particular, this investigation deals with manufacturing and joining of a frictionally engaged shaft-hub-connection by lateral extrusion. One key challenge of such new process management is the prior layout of both optimal friction conditions during manufacturing process on the one hand and highly expected static friction interaction of joined components in order to transmit tangential and axial forces on the other hand. Therefore, cylindrical, thin-walled hubs have been manufactured and joined to shafts. Several parameters describing the tribological system between shaft and hub such as contact surface topographies and lubricant, have been varied within this study. By measuring the radial deformation of the hub, the contact pressure is determined and a normal force applied to the contact surface of shaft and hub is calculated. When separating hub and shaft in a destructive manner, an extensive axial tensile force is applied and measured. According to Coulomb's friction law, specific friction coefficients are calculated depending on manufacturing process parameters as mentioned above.

• Periodical: Advanced Materials Research (Volumes 966-967)
• Pages: 659-670
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.966-967.659
• Online since: June 2014
• Authors: Florian Dörr*, Michael Funk, Mathias Liewald, Hansgeorg Binz, Marco Savino
• Keywords: Joining by Forming, Lateral Extrusion, Shaft-Hub-Connection

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