An eddy-current-based sensor for preventing knots in metallic wire drawing processes

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Issue date
2011-04
Author
Esteban Dalmau, Bernat
Riba Ruiz, Jordi-Roger
Baquero Armans, Grau
Suggested citation
Esteban Dalmau, Bernat; Riba Ruiz, Jordi-Roger; Baquero Armans, Grau; . (2011) . An eddy-current-based sensor for preventing knots in metallic wire drawing processes. Nondestructive Testing and Evaluation, 2011, vol. 26, núm. 2, p. 169-180. https://doi.org/10.1080/10589759.2010.545128.
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Abstract
During metallic wire drawing processes, the presence of knots and the failure to detect them can lead to long production interruptions, significant economic losses and a lower quality of final product. Consequently, there is a pressing need to develop methods for real-time detection and prevention of this fault. In this paper a sensor to prevent the formation of knots during the metallic wire drawing process is presented and evaluated by means of experimental data. This fast, inexpensive, non-contact sensor is based on electromagnetic principles such as eddy current induction, magnetic reluctance variations and magnetic coupling. The proposed sensor can detect knots in a target metallic wire without direct contact by measuring the impedance variations of a calibrated sensing coil caused either by a knot or an unwound loop rising from a wire rod. The incorporation of this type of sensor into a wire drawing machine can avoid the tightening of the knot, thereby reducing downtime and increasing the security and reliability of the process. Experiments were conducted using a scale model of the above proposed system. This allowed to highlight the sensor’s potential by carrying out an automatic, real-time knot detection during steel wire drawing.
URI
http://hdl.handle.net/10459.1/71019
DOI
https://doi.org/10.1080/10589759.2010.545128
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Nondestructive Testing and Evaluation, 2011, vol. 26, núm. 2, p. 169-180
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cc-by-nc-nd, (c) Taylor & Francis, 2011
Except where otherwise noted, this item's license is described as cc-by-nc-nd, (c) Taylor & Francis, 2011