Browsing by Author "Luri Irigoyen, Rodrigo"
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Publication Open Access Análisis de la influencia del tratamiento térmico de envejecimiento en la modificación de las propiedades mecánicas de la aleación AA6060 procesada por ECAE(CENIM, 2011) Pérez Ruiz, Iván; Luis Pérez, Carmelo; Luri Irigoyen, Rodrigo; León Iriarte, Javier; Puertas Arbizu, Ignacio; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaEn el presente trabajo se ha realizado un estudio de la modificación de las propiedades mecánicas de la aleación de aluminio AA6060 F, al ser deformada mediante deformación plástica severa empleando el proceso de extrusión en canal angular (ECAE). Asimismo, se ha efectuado un estudio del efecto del envejecimiento artificial sobre la modificación de dichas propiedades mecánicas. Para ello, se han realizado tratamientos térmicos a diferentes temperaturas y tiempos de permanencia, efectuando mediciones de dureza, ensayos de tracción, ensayos con péndulo Charpy y técnicas de revelado metalográfico, para conocer los comportamientos mecánicos y el estado del material. Existe un elevado número de publicaciones, que han analizado el efecto de tratamientos térmicos de envejecimiento en aleaciones de la serie 6000. Sin embargo, la aleación AA6060 no ha sido tan ampliamente estudiada. Por ello, en este trabajo se parte de una aleación comercial AA6060 en estado de bruto de colada, lo cual no ha sido estudiado hasta la fecha.Publication Open Access Análisis por elementos finitos de máquina fresadora(2011) Murgado García, David; Luri Irigoyen, Rodrigo; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaEn este proyecto fin de carrera se estudiarán y se analizará el comportamiento de una fresadora en el mecanizado. Se estudiará las diferentes partes de la fresadora y se analizara que es lo que pasa cuando se está mecanizando. Al mecanizar, las fuerzas de corte que se emplean para trabajar la pieza producen vibraciones que afectarán en mayor o en menor medida a la estructura de la máquina-herramienta produciendo que haya desplazamientos y no se cumplan con las tolerancias o con los requisitos de acabado de la pieza. Por esta razón se va a realizar un análisis por elementos finitos (FEM) de las partes de la fresadora que más sufren estas fuerzas y con los resultados que se consigan de este análisis se creará un mecanismo de control consistente en un controlador que ajustará la señal de salida de tal forma que se corrijan esas desviaciones. Con este presente proyecto se pretende tener un mayor conocimiento de los procesos de fabricación y del control de las fuerzas de procesado y así obtener un mecanismo de control que mejore los resultados de los procesos de mecanizado.Publication Open Access Análisis y modelización del daño en elementos mecánicos obtenidos a partir de material nanoestructurado(2017) Fuertes Bonel, Juan Pablo; Luis Pérez, Carmelo; Luri Irigoyen, Rodrigo; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaPublication Open Access Analysis of fatigue and wear behaviour in ultrafine grained connecting rods(MDPI, 2017) Luri Irigoyen, Rodrigo; Luis Pérez, Carmelo; León Iriarte, Javier; Fuertes Bonel, Juan Pablo; Salcedo Pérez, Daniel; Puertas Arbizu, Ignacio; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaOver the last few years there has been an increasing interest in the study and development of processes that make it possible to obtain ultra-fine grained materials. Although there exists a large number of published works related to the improvement of the mechanical properties in these materials, there are only a few studies that analyse their in-service behaviour (fatigue and wear). In order to bridge the gap, in this present work, the fatigue and wear results obtained for connecting rods manufactured by using two different aluminium alloys (AA5754 and AA5083) previously deformed by severe plastic deformation (SPD), using Equal Channel Angular Pressing (ECAP), in order to obtain the ultrafine grain size in the processed materials are shown. For both aluminium alloys, two initial states were studied: annealed and ECAPed. The connecting rods were manufactured from the previously processed materials by using isothermal forging. Fatigue and wear experiments were carried out in order to characterize the in-service behaviour of the components. A comparative study of the results was made for both initial states of the materials. Furthermore, Finite Element Modelling (FEM) simulations were used in order to compare experimental results with those obtained from simulations. In addition, dimensional wear coefficients were found for each of the aluminium alloys and initial deformation states. This research work aims to progress the knowledge of the behaviour of components manufactured from ultrafine grain materials.Publication Open Access Analysis of tribological properties in disks of AA-5754 and AA-5083 aluminium alloys previously processed by equal channel angular pressing and isothermally forged(MDPI, 2020) Luis Pérez, Carmelo; Luri Irigoyen, Rodrigo; Puertas Arbizu, Ignacio; Salcedo Pérez, Daniel; León Iriarte, Javier; Fuertes Bonel, Juan Pablo; Ingeniería; IngeniaritzaIn the present study, the wear behaviour of two aluminium alloys (AA‐5754 and AA‐5083) is analysed where these have been previously processed by severe plastic deformation (SPD) with equal channel angular pressing (ECAP). In order to achieve the objectives of this study, several disks made of these alloys are manufactured by isothermal forging from different initial states. The microstructures of the initial materials analysed in this study have different accumulated deformation levels. In order to compare the properties of the nanostructured materials with those which have not been ECAP‐processed, several disks with a height of 6 mm and a diameter of 35 mm are manufactured from both aluminium alloys (that is, AA‐5754 and AA‐5083) isothermally forged at temperatures of 150 and 200 °C, respectively. These thus‐manufactured disks are tested under a load of 0.6 kN, which is equivalent to a stress mean value of 18 MPa, and at a rotational speed of 200 rpm. In order to determine the wear values, the disks are weighed at the beginning, at 10,000 revolutions, at 50,000 revolutions and at 100,000 revolutions, and then the volume‐loss values are calculated. This study was carried out using specific equipment, which may be considered to have a block‐on‐ring configuration, developed for testing in‐service wear behaviour of mechanical components. From this, the wear coefficients for the two materials at different initial states are obtained. In addition, a comparison is made between the behaviour of the previously ECAP-processed aluminium alloys and those that are non‐ECAP‐processed. A methodology is proposed to determine wear coefficients for the aluminium alloys under consideration, which may be used to predict the wear behaviour. It is demonstrated that AA‐5754 and AA‐5083 aluminium alloys improve wear behaviour after the ECAP process compared to that obtained in non‐ECAP‐processed materials.Publication Open Access Analysis on the manufacturing of an AA5083 straight blade previously ECAE processed(Hindawi, 2013) Salcedo Pérez, Daniel; Luis Pérez, Carmelo; Puertas Arbizu, Ignacio; León Iriarte, Javier; Fuertes Bonel, Juan Pablo; Luri Irigoyen, Rodrigo; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaOver these past few years, there have been a large number of technical papers published related to the problem of improving the mechanical properties of materials obtained through severe plastic deformation. Nevertheless, the number of technical papers dealing with improvement in the mechanical properties of mechanical components manufactured from submicrometric grain size material has not been so proficient. Therefore, in this present research work, a straight blade has been manufactured starting from AA-5083 previously processed by ECAE twice (N2) with route C.This material will be manipulated so as to be isothermally forged at different temperature values.This present research work shows the results that are inherent in an improvement in themechanical properties and the microstructure achieved in the thus obtained components, compared with the starting material. In addition, the optimum forging temperature to achieve these components will be determined. As shown in this research work, it is possible to obtain submicrometric grain size mechanical components with a higher mechanical strength than those obtained in nonultrafine grained materials. The originality of this research work lies in the manufacturing of actual mechanical components from ECAE processed material and the analysis of their properties.Publication Open Access Cálculo y diseño de un reductor de velocidad de dos etapas(2020) Arandigoyen Pejenaute, Naroa; Luri Irigoyen, Rodrigo; Escuela Técnica Superior de Ingeniería Industrial, Informática y de Telecomunicación; Industria, Informatika eta Telekomunikazio Ingeniaritzako Goi Mailako Eskola TeknikoaEl objetivo principal de este TFG es realizar el cálculo y diseño de un reductor de velocidad de dos etapas. El tipo de transmisión escogido es por engranajes directos de dientes rectos, siendo los ejes de entrada y de salida coaxiales. La relación de transmisión del mecanismo será igual a 12. El mecanismo es requerido para ser acoplado a una máquina herramienta genérica, que cumpla que la velocidad de entrada sea de 1500 rpm, cuando se entrega el par máximo, 1800 Nͼm, y la de salida sea de 125 rpm. El proceso de diseño ha comenzado con el dimensionamiento de los engranajes atendiendo a las ecuaciones de resistencia AGMA. Posteriormente, se han diseñado los ejes en base al cálculo de fatiga. Más tarde, se han calculado y seleccionado los rodamientos, anillos de sujeción, chavetas y tuercas. Seguidamente, se ha hecho una simulación por elementos finitos de cada eje con ayuda del programa Marc Mentat con el objetivo de acercarse más a la realidad y ver si sufren fallos por fatiga. Una vez conocidas todas las dimensiones finales de todos los componentes, se ha diseñado la carcasa donde irán apoyados. Más tarde, se ha descrito la fabricación de cada elemento así como el montaje final del mecanismo. Y por último, se ha realizado un presupuesto del reductor de velocidad y se han realizado los planos correspondientes de todos los componentes que lo forman.Publication Open Access Comparative study of the damage attained with different specimens by FEM(Elsevier, 2015) Fuertes Bonel, Juan Pablo; Luri Irigoyen, Rodrigo; Luis Pérez, Carmelo; Salcedo Pérez, Daniel; León Iriarte, Javier; Puertas Arbizu, Ignacio; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaThis present research work deals with the analysis of the design of different specimen geometries so that by finite volume simulations, the appearance of cracks may be predicted in the case of forging processes. To this end, each of the geometries selected are studied by means of compression tests between plane shape dies in the same conditions (T = 25 ºC). On the one hand, a value for the critical damage value is obtained by applying the Cockroft-Latham’s criterion and on the other hand, a damage distribution along all the specimen volume with the aim of defining a specimen which shows the most likely place for the crack to appear. This crack location may be also determined through visual inspection with the aim of being able to evaluate this experimentally in the near future.Publication Restricted Desarrollo de una metodología para caracterizar materiales metálicos sometidos a esfuerzos cíclicos a temperatura(2009) Alfaro Ruiz, Maite; Luri Irigoyen, Rodrigo; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaPublication Open Access Design and mechanical properties analysis of AA5083 ultrafine grained cams(MDPI, 2017) Salcedo Pérez, Daniel; Luis Pérez, Carmelo; Luri Irigoyen, Rodrigo; Puertas Arbizu, Ignacio; León Iriarte, Javier; Fuertes Bonel, Juan Pablo; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaThis present research work deals with the development of ultrafine grained cams obtained from previously ECAP (Equal Channel Angular Pressing)-processed material and manufactured by isothermal forging. The design and the manufacturing of the dies required for the isothermal forging of the cams are shown. Optimization techniques based on the combination of design of experiments, finite element and finite volume simulations are employed to develop the dies. A comparison is made between the mechanical properties obtained with the cams manufactured from material with no previous deformation and with those from previously SPD (Severe Plastic Deformation)-processed material. In addition, a comparative study between the experimental results and those obtained from the simulations is carried out. It has been demonstrated that it is possible to obtain ultrafine grained cams with an increase of 10.3% in the microhardness mean value as compared to that obtained from material with no previous deformation.Publication Open Access Design and optimization of the dies for the isothermal forging of a cam(Elsevier, 2015) Salcedo Pérez, Daniel; Luis Pérez, Carmelo; Luri Irigoyen, Rodrigo; León Iriarte, Javier; Puertas Arbizu, Ignacio; Fuertes Bonel, Juan Pablo; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaIn the present study, the design of the dies required for the isothermal forging of a cam is analysed by finite volume method. Specifically, cams are of great importance in automotive industry, where a lower weight and an improvement in the lubrication or in the materials to be in contact lead to a significant reduction in the fuel cost. The flow stress curves of one Al-Mg alloy were firstly determined by using compression tests. Once these flow stress curves were obtained, FV simulation was employed. In the forging process, the optimum die configuration has been selected. To this end, several aspects have been taken into account such as the force required for the forging, the correct die filling, the introduced plastic strain and the damage imparted to the billet.Publication Open Access Design, optimization, and mechanical property analysis of a submicrometric aluminium alloy connecting rod(Hindawi, 2015) Fuertes Bonel, Juan Pablo; León Iriarte, Javier; Luis Pérez, Carmelo; Salcedo Pérez, Daniel; Puertas Arbizu, Ignacio; Luri Irigoyen, Rodrigo; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaUltrafine grained materials have a great deal of both scientific and technological interest because they allow outstanding properties to be obtained. An improvement in the mechanical strength and in the ductility and a better fatigue behaviour are properties to be expected with these materials. However, in spite of the great number of scientific publications that deals with the mechanical property improvement, the number of practical applications of these materials is scant. In this present research work, equal channel angular pressing (ECAP) is used as a severe plastic deformation process (SPD) to obtain billets which are subsequently isothermally forged to obtain a connecting rod with submicrometric grain size. The optimization of the design process is shown as well as the die design. The objective variables to be fulfilled are the correct filling of the die and the required force to obtain the part. Moreover, a comparison is also included between the mechanical properties thus obtained and those obtained with traditional methods. Moreover, optical and SEM micrographs are also included in this research work.Publication Open Access Design, simulation and manufacturing of a connecting rod from ultra-fine grained material and isothermal forging(Elsevier, 2016) Fuertes Bonel, Juan Pablo; Luis Pérez, Carmelo; Luri Irigoyen, Rodrigo; Salcedo Pérez, Daniel; León Iriarte, Javier; Puertas Arbizu, Ignacio; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaIn this research work, a study on the mechanical properties of isothermal forging for connecting rods is made from previously ECAP (Equal Channel Angular Pressing)-processed AA1050 and AA5083 aluminium alloys. This severe plastic deformation (SPD) process is used in order to achieve a starting material with a submicrometric structure, thus improving the mechanical properties of the part. In this study, the design and the experimentation process is shown, where this involves the design stage by finite element simulations, the experimental tests and the use of metallographic techniques for the required properties to be analysed. Itis observed thatthere is an improvementin the mechanical properties when the starting material is ECAP-processed before carrying out the isothermal forging. This improvement consists in an increase of 20% in the hardness of the final connecting rod which also possesses a microstructure grain size of 500 nm. To come to these conclusions,the results obtained with the connecting rods manufactured by isothermal forging from previously ECAP-processed material are compared with those conventionally manufactured. Therefore,the feasibility and the advantages ofthe industrialmanufacturing ofmechanical components by isothermal forging from ECAP-processed material are demonstrated here as mechanical properties are achieved, as well as a better flow of the material and at a lower forging temperature. In the existing bibliography, there are no research works dealing with the manufacturing of connecting rods from ultra-fine grained material and that is the reason why this present study is considered to be of scientific and technological interest, and therefore, it may be considered to be at the frontline of current knowledge.Publication Open Access Detección y marcaje automáticos de defectos exteriores de carrocería pintada en líneas de pulido de pintura de VW Navarra. Memoria(2014) Tardío Martos, Leyre; Luri Irigoyen, Rodrigo; Laszczok, Bartosch; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola TeknikoaEl control y retrabajo de carrocerías tras la aplicación de las lacas es un proceso indispensable de cara a asegurar la calidad de los vehículos que adquieren los clientes. Actualmente en Volkswagen Navarra, la detección defectos se realiza de forma visual y depende completamente del factor humano. Debido a este hecho, este proceso de suma importancia es variable y poco eficaz y existe el riesgo de que los fallos lleguen al cliente final. En el presente proyecto se presentan varias alternativas para automatizar el proceso de localización de defectos exteriores y se desarrolla aquella que se considera más adecuada para la fábrica y su situación actual. La descripción de dicha instalación incluye parte técnica, ahorros, valoraciones económicas y análisis de calidad del nuevo procesoPublication Open Access Development of nanostructured AA3103 by equal channel angular pressing and thermal treatments(Hindawi, 2014) Luis Pérez, Carmelo; Luri Irigoyen, Rodrigo; León Iriarte, Javier; Puertas Arbizu, Ignacio; Salcedo Pérez, Daniel; Pérez Ruiz, Iván; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen Ingeniaritza; Gobierno de Navarra / Nafarroako Gobernua, Project EUROINNOVA NANOCONS-IIM10784.RI1This work presents a study related to the achievement of a nanometric structure in AA3103, employing severe plastic deformation processes (SPD), in this case equal channel angular pressing (ECAP). The changes in the mechanical properties and in the microstructure of AA3103 were studied after being processed by ECAP. Subsequently, scanning electron microscopy was used to determine the evolution of the microstructure after different thermal treatments on the material processed by this severe plastic deformation process. Furthermore, a more profound knowledge of the changes in the mechanical properties of this aluminium alloy was obtained. It was demonstrated that with different appropriate combinations of thermal treatments and ECAP processing, it is possible to significantly improve the mechanical properties through obtaining submicrometric grain size structures.Publication Restricted Diseño de una célula de carga(2009) Rebolé Otazu, Eneko; Luri Irigoyen, Rodrigo; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaPublication Open Access Diseño y cálculo de un troquel para la estampación en frío del soporte metálico de una pastilla de freno(2012) García Blazquiz, Emilio; Luri Irigoyen, Rodrigo; Salcedo Pérez, Daniel; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaEste proyecto fin de carrera tiene por objeto el desarrollo de las especificaciones técnicas y de fabricación para llevar a cabo un sistema de fabricación adecuado para una pieza de las siguientes características: • Pieza de chapa de 5,5 mm de espesor del tipo AP-11 según norma UNE 36-093-85 • Tolerancias dimensionales según NES D0016. Especificadas por cliente • Necesidad de fabricar piezas simétricas. Cantidad media anual 50.000 Uds • Tratamiento superficial: sin tratamiento. • Serie de alta producción de piezas. El proceso más indicado de fabricación, basándonos en estas características propias de la pieza y en las unidades anuales, será el conformado en frío mediante un troquel compuesto animado por prensa hidráulica de simple efecto. Para ello a partir de la geometría de la pieza que se desea obtener se diseñan y fabrican los utillajes, matrices y demás elementos para su fabricación. Se emplearan F.E.M para el diseño de los utillajes. De esta forma se reducirán los tiempos de diseño, fabricación y puesta en marcha de los mismos. Además empleando la metodología F.E.M en el diseño se reducirán las pruebas de matrices necesarias para la puesta en marcha. Se intentará a través de los siguientes capítulos explicar todas las características de este tipo de sistema productivo, y se desarrollará un estudio completo de los aspectos más relevantes para conseguir las mejores soluciones de diseño.Publication Unknown Diseño, validación y fabricación de una potencia de bicicleta(2023) Araiz Michel, Sergio Néstor; Luri Irigoyen, Rodrigo; Escuela Técnica Superior de Ingeniería Industrial, Informática y de Telecomunicación; Industria, Informatika eta Telekomunikazio Ingeniaritzako Goi Mailako Eskola TeknikoaEl objetivo de este Trabajo Fin de Grado es diseñar y validar una potencia de bicicleta haciendo uso de programas de diseño en 3D y elementos finitos para la comprobación. Como punto de partida se hace una introducción y se analiza el estado del arte existente. Tras estudiar los requisitos y seleccionar el material se simulan los ensayos exigidos por la normativa mediante elementos finitos y se analizan los resultados obtenidos para justificar la elección de la versión final. Por último, se explica el proceso de inyección por inyección a alta presión en cámara fría, se realiza un prediseño de los rasgos principales de los moldes y se estima un presupuesto para comprobar la viabilidad y amortización de los moldes.Publication Open Access Experimental and FEM analysis of wear behaviour in AA5083 ultrafine-grained cams(MDPI, 2020) Luis Pérez, Carmelo; Luri Irigoyen, Rodrigo; Fuertes Bonel, Juan Pablo; León Iriarte, Javier; Salcedo Pérez, Daniel; Puertas Arbizu, Ignacio; Ingeniería; IngeniaritzaSevere plastic deformation (SPD) processes have attracted a great deal of both scientific and technological interest over the last few years as a consequence of the improvements that are possible to obtain in the microstructure and mechanical properties of the materials manufactured through the use of these kind of processes. However, the practical applications of such materials to obtain mechanical components are significantly fewer. As a direct consequence, the same thing has been observed in the development of studies that show the in-service behaviour of the mechanical components developed in this way. Since one of the industrial objectives of these SPD processes is to obtain functional parts, it is necessary to carry out studies to fill this gap. Therefore, in this study, an analysis of the wear that cams undergo when manufactured from an AA5083 aluminium-magnesium alloy is carried out. The cams were isothermally-forged from materials with and without previous SPD processing by equal channel angular pressing (ECAP). Subsequently, the wear behaviour of these cams was analysed by using specific equipment, which may have been considered to have a block-on-ring configuration, developed for testing in-service wear behaviour of mechanical parts. From this comparative wear study with cams, it is shown that previously-processed materials by ECAP have a better wear performance. Moreover, finite element modelling (FEM) simulations were also included to predict wear in the cams processed in this way. A good agreement between FEM and experimental results was obtained. It is this aspect of performing the wear tests on functional and real mechanical components, and not on laboratory samples, which makes this present research work novel.Publication Unknown Experimental modelling of critical damage obtained in Al-Mg and Al-Mn alloys for both annealed state and previously deformed by ECAP(Elsevier, 2016) Luri Irigoyen, Rodrigo; Fuertes Bonel, Juan Pablo; Luis Pérez, Carmelo; Salcedo Pérez, Daniel; Puertas Arbizu, Ignacio; León Iriarte, Javier; Ingeniería Mecánica, Energética y de Materiales; Mekanika, Energetika eta Materialen IngeniaritzaAssessing the damage produced in plastic deformation processes permits the optimum manner to shape a material that could avoid any cracks from appearing. In this present research work, the absolute critical damage in the following aluminium alloys: AA5754, AA5083 and AA3103 is to be determined. In order to do this, compression tests between plane-shape dies will be performed for the abovementioned alloys at a temperature range which varies from 25 °C to 300 °C and using Cockroft–Latham's prediction model. Furthermore, the results obtained by finite volume simulations will be compared with those obtained by experimental tests with isothermal upsetting. Given that in these last few years there has been a growing interest in obtaining mechanical components from submicrometric and/or nanometric structure materials which have been previously-processed by severe plastic deformation (SPD), this present research work deals with the determination of absolute critical damage for the abovementioned alloys once they have been ECAP (Equal Channel Angular Pressing) processed. This is considered to be of interest since it could allow the prediction of optimal processing conditions in advance.