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Fecha
2022-10-12
Derechos de acceso
info:eu-repo/semantics/openAccess
Título de la revista
ISSN de la revista
Título del volumen
Editorial
MDPI
Citas
Resumen
Glass fiber-reinforced composites are widely used in industry, with machining operations frequently performed, drilling, in particular, for later assembly. Although there is a smaller increase in temperature during drilling in composites than in metals, further cooling of the tool can produce improvements in some variables, such as thrust force, diameter, or surface roughness. This has been seen in studies where lower temperatures were achieved by cooling compressed air, reaching around −20 °C in plates of polyether-ether-ketone and polyamide, reinforced with glass fiber at 30% (PEEK-GF30 and PA-GF30, respectively). This paper analyzes the results of cryogenic drilling in plates of PEEK-GF30 and PA-GF30, specifically assessing thrust forces, diameter, and average surface roughness. The experimental methodology was carried out by monitoring thrust forces during cryogenic drilling using a piezoelectric dynamometer, measuring diameters with a coordinate measurement machine, and assessing surface quality with a roughness profilometer. During the cutting, the temperature of the cutting tool achieved a temperature near −120 °C from cooling with liquid nitrogen. Conducting an analytical and statistical study allowed us to determine the relationships between the measured variables and cutting conditions. Our results showed that cooling the tool during the drilling processes improved results of the cutting process.
Descripción
The registered version of this article, first published in Applied Sciences, is available online at the publisher's website: MDPI, https://doi.org/10.3390/app122010275
La versión registrada de este artículo, publicado por primera vez en Applied Sciences, está disponible en línea en el sitio web del editor: MDPI, https://doi.org/10.3390/app122010275
La versión registrada de este artículo, publicado por primera vez en Applied Sciences, está disponible en línea en el sitio web del editor: MDPI, https://doi.org/10.3390/app122010275
Categorías UNESCO
Palabras clave
cryogenic machining, drilling, PEEK-GF30, PA66-GF30, thrust force, circularity, surface roughness
Citación
Domingo, R., de Agustina, B., & Ayllón, J. (2022). Study of Drilled Holes after a Cryogenic Machining in Glass Fiber-Reinforced Composites. Applied Sciences, 12(20), 10275. https://doi.org/10.3390/app122010275
Centro
E.T.S. de Ingenieros Industriales
Departamento
Ingeniería de Construcción y Fabricación