Ingeniería Mecánica
Permanent URI for this collectionhttp://repositorio.uta.edu.ec/handle/123456789/900
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Item Análisis integral de la influencia de parámetros de mecanizado y lubricantes ecoeficientes en la productividad y calidad superficial en procesos de mecanizado sostenible de aceros(Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2024-08) Celi Mariño, Fabián Patricio; Núñez Núñez, Melanie Doménica; Núñez Núñez, Diego FernandoThere is a discrepancy between traditional machining methods and the urgent need to implement ecological and sustainable strategies in the steel and machining industry in Ecuador. This misalignment is evident in the choice of lubricants and the optimization of machining parameters, affecting the production and surface quality of products. Aligning machining processes with sustainability principles is crucial for the sector's efficiency and its contribution to the country's sustainable growth. The primary objective is to evaluate the relationship between these variables and determine optimal strategies for sustainable machining of steels. The methodology employed is based on three stages: A correlational analysis of data from previous research was conducted to identify relationships between the study variables. Recommendations and strategies for implementing sustainable cooling in machining processes were developed. Experimental validation of the predictions was carried out through specific tests that allowed the hypotheses to be verified. The results obtained confirm the significant influence of machining parameters and eco-efficient lubricants on the productivity and surface quality of steel machining. The potential of Minimum Quantity Lubrication (MQL) to prolong tool life and reduce the environmental impact of the process is highlighted. The results indicated that cutting speed, spindle speed, tool nose radius, nanoparticle concentration, type of lubricating oil, number of nozzles, incidence angle, and cooling method are variables that influenced surface quality and flank wear.Item Análisis comparativo de la evolución del desgaste de las herramientas de corte en procesos de fresado del acero AISI 304 lubricados mediante inundación y nanocriomecanizado(Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2024-02) González Jiménez, Juan José; Núñez Núñez, Diego FernandoDue to the environmental and operator health problems caused by water emulsion coolants in the machining area, combined with the low useful life of cutting tools in milling processes, it has become necessary to study new environmentally friendly alternatives. The present research focuses on the study of the effect of a hybrid lubrication method, which involves the use of the MQL (Minimum Quantity Lubricant) technique with the addition of nanoparticles in combination with a cryogenic fluid, on the flank wear of cutting tools in face milling processes of AISI 304 stainless steel. The experiments were carried out using a semi-finishing process on a CNC milling machine; carbide cutting inserts with PVD-TiAlN coating were used; the MQL system worked with biodegradable oil Unist Coolube 2210XP with Titanium Oxide nanoparticles prepared at 0.5 weight percent and the cryogenic system with Carbon Dioxide in liquid and gas phase. The machining parameters were: cutting speed of 190 and 270 m/min, feed rate of 0.1 mm/tooth, axial depth of 0.3 mm. The measurements were performed through a scanning electron microscope and evaluated using the ISO 8688-1: 1989 standard under normal wear criteria. The results obtained in this experimental work indicate an increase in cutting tool life for the speed of 190 m/min and 270 m/min by 85.35 and 230.60 percent respectively.Item Evaluación del desgaste de las herramientas de corte y acabado superficial en el fresado del acero inoxidable AISI 304 y acero AISI 1018 utilizando lubricación híbrida (nanofluidos +CO2)(Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2024-01) Llumitasig Tubón, Wilmer Alexander; Núñez Núñez, Diego Fernando; Ocaña Guzmán, Adriel SantiagoThe present project focused on the analysis of the effect of the hybrid lubrication method and a Minimum Quantity Lubricant (MQL) system together with Titanium Dioxide and Alumina nanoparticles on the milling process of AISI 1018 and AISI 304 steels, cutting tool flank wear and surface finish, which will be carried out on a CNC milling machine. In this analysis hard metal inserts with PVD TiAlN coating were used, cutting speed is the variable parameter, the recommended and maximum values by the manufacturer were used to establish the experimental combinations, for the hybrid lubrication methods two types of nanoparticles were used, Titanium Dioxide and Alumina for AISI 1018 and AISI 304 steels respectively at a concentration of 0. 5 percent by weight; using a combination of liquid and gaseous CO2 together with the system of minimum amount of lubricant directed to the contact zone of the work material and cutting tool to minimize the friction and temperatures generated in the cutting process. For the evaluation of flank wear and roughness, standard instruments such as the scanning electron microscope, based on the ISO 8688-1 standard specialized in this type of evaluations, and a roughness meter for the measurement of surface quality Ra and Rz were used. After analysis of the results, the surface finish of the steels was improved and the service life of the cutting tools was increased.Item Influencia de los sistemas de lubricación en el acabado superficial en la punta de eje posterior del Nissan Patrol en el proceso de torneado(Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2016) Villácres Gavilanes, Juan Carlos; Vaca Ortega, Wilson Henry