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Materials 2018, 11(6), 928; https://doi.org/10.3390/ma11060928

Applying Low-Frequency Vibration for the Experimental Investigation of Clutch Hub Forming

1
School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2
School of Mechanical Engineering, Northwest Polytechnical University, Xi’an 710072, China
3
Department of Mechanical Engineering, National University of Singapore, Singapore 119260, Singapore
4
School of Engineering Technology, Purdue University, 401 N. Grant Street, West Lafayette, IN 47906, USA
*
Authors to whom correspondence should be addressed.
Received: 4 May 2018 / Revised: 27 May 2018 / Accepted: 28 May 2018 / Published: 30 May 2018
(This article belongs to the Section Manufacturing Processes and Systems)
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Abstract

A vibration-assisted plastic-forming method was proposed, and its influence on clutch hub forming process was investigated. The experiments were conducted on a vibration-assisted hydraulic extrusion press with adjustable frequency and amplitude. Vibration frequency and amplitude were considered in investigating the effect of vibration on forming load and surface quality. Results showed that applying vibration can effectively reduce forming force and improve surface quality. The drop in forming load was proportional to the vibration frequency and amplitude, and the load decreased by up to 25%. Such reduction in forming load raised with amplitude increase because the increase in amplitude would accelerate punch relative speed, which then weakened the adhesion between workpiece and dies. By increasing the vibration frequency, the punch movement was enhanced, and the number of attempts to drag the lubricant out of the pits was increased. In this manner, the lubrication condition was improved greatly. The 3D surface topography testing confirmed the assumption. Moreover, vibration frequency exerted a more significant effect on the forming load reduction than vibration amplitude. View Full-Text
Keywords: clutch hub; vibration-assisted forming; load reduction; lubrication; surface quality clutch hub; vibration-assisted forming; load reduction; lubrication; surface quality
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Meng, D.; Zhu, C.; Zhao, X.; Zhao, S. Applying Low-Frequency Vibration for the Experimental Investigation of Clutch Hub Forming. Materials 2018, 11, 928.

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