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      저자 : Eva María Rubio (검색결과 2 건)
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        Comparative Analysis of Sustainable Cooling Systems in Intermittent Turning of Magnesium Pieces

        Eva María Rubio,María Villeta,Diego Carou,Adolfo Saá 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.

        Cutting fluids have been widely used in machining processes because of their favourable lubrication and cooling properties. However,their high costs, the risk to worker’s health and environmental concerns have necessitated the development of alternative methods ofcooling and lubricating that eliminate or, reduce such drawbacks. In this study, a comparative analysis of two sustainable coolingsystems (dry machining and minimum quantity lubrication (MQL) system) in intermittent turning of UNS M11917 magnesium pieceswas performed. To analyse the influence of the cooling system on intermittent cutting, the surface roughness was selected as theresponse variable. In addition to the cooling system, other parameters such as the feed rate, spindle speed, tool type, interruption typeand measurement zone (defined by the length and the generatrix) were taken into account. A combined L4x32 experimental design withthree nested replications was carried out. The obtained data were analysed using the analysis of variance (ANOVA) method. Mainconclusions include the identification of the feed rate and interruption type as the most important sources of surface roughnessvariability. In addition, it is possible to affirm that, in general, increases in the coolant flow rate, within the range studied, lead toslightly poorer surface roughness results.

      • KCI등재

        Sustainable Lubrication/Cooling Systems for Efficient Turning Operations of g-TiAl Parts from the Aeronautic Industry

        Elisabet Benedicto,Eva María Rubio,Laurent Aubouy,María Ana Sáenz-Nuño 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.10 No.3

        This paper presents the study of the finishing, repair, and maintenance turning operations of gamma titanium aluminide (γ-TiAl) parts from the aeronautic industry, with the aim to evaluate different sustainable lubrication/cooling environments, including a newly developed synthetic ester water-based metalworking fluid (EcoMWF) to replace mineral-based MWF (MWF). The systems considered in this work are dry, cold-compressed air, minimum quantity lubrication (MQL), cryogenic, and flood on turning of a new and relatively low explored titanium alloy, γ-TiAl. Therefore, the influence of machining parameters and insert type on tool wear, surface roughness, roundness, and cutting temperature have been investigated for each environment. Results detailed in this study showed a significant influence of the lubrication/cooling systems on the machinability of γ-TiAl. The study also revealed that the sustainability of turning γ-TiAl could be improved under the cryogenic system and the new EcoMWF, keeping the same machining performance as common mineral-based MWF.

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