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Vibrations in CDFW

Institute of industrial Engineering, Federal University of Itajubá (UNIFEI), Itajubá 37500-903, Brazil
Federal Center of Technological Education of Minas Gerais (CEFET-MG), Varginha 37022-560, Brazil
Authors to whom correspondence should be addressed.
Entropy 2020, 22(6), 704;
Received: 5 November 2019 / Revised: 6 January 2020 / Accepted: 14 January 2020 / Published: 24 June 2020
(This article belongs to the Section Multidisciplinary Applications)
Continuous drive friction welding is a solid-state welding process that has been experimentally proven to be a fast and reliable method. This is a complex process; deformations in the viscosity of a material alter the friction between the surfaces of the pieces. All these dynamics cause changes in the vibration signals; the interpretation of these signals can reveal important information. The vibration signals generated during the friction and forging stages are measured on the stationary part of the structure to determine the influence of the manipulated variables on the time domain statistical characteristics (root mean square, peak value, crest factor, and kurtosis). In the frequency domain, empirical mode decomposition is used to characterize frequencies. It was observed that it is possible to identify the effects of the manipulated variables on the calculated statistical characteristics. The results also indicate that the effect of manipulated variables is stronger on low-frequency signals. View Full-Text
Keywords: friction; welding; mean square root; crest factor; peak; kurtosis; empirical mode decomposition friction; welding; mean square root; crest factor; peak; kurtosis; empirical mode decomposition
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MDPI and ACS Style

Soares de Alcantara, D.; Balestrassi, P.P.; Freitas Gomes, J.H.; Carvalho Castro, C.A. Vibrations in CDFW. Entropy 2020, 22, 704.

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