Ingeniería Mecánica

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    Diseño y construcción de la estructura tubular para la carrocería del prototipo de un auto eléctrico BIPLAZA UTA-CIM17
    (2018) Lizano Núñez, Carlos David; Arroba Arroba, César Hernán
    This project is of great interest from the innovative point of view as it contributes to the growing tendency to project towards the use of non-polluting energies such as the use of fossil fuels. The present project was elaborated in some phases, first designing the geometry considering spaces and distribution of components, the selection of the material was very important considering some materials it was decided to build the floor of the interior, the front and back with galvanized structural steel pipe ASTM A-500 of (30x30x2) mm and the ceiling with tube (25x25x1.5) mm, based on these parameters it was needed a CAD / CAE software to visualize the design and the forms, the next phase was to calculate the states load that would be subject to the structure such as vertical loads, braking, acceleration, rotation, resistance to wind and torsion, with the values of the loads was proceeded to simulate with the help of the ANSYS student version program to obtain results of displacements, Von Misses effort and essential safety factors for the design. Finally, in the construction phase, the selected profiles were cut and welded using GMAW ER70S-6 welding, while the structure was assembled also the other subsystems accompanying the structure were assembled as suspension, propulsion and steering.
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    Análisis de soldadura en frío y costura mecánica para fisuras en hierro fundido gris y su aplicación en la reconstrucción de un block.
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2018) Morales Miranda, Christian Andrés; Espín Lagos, Segundo Manuel
    Nowadays the recovery by welding in cast iron components is very important, considering that these foundries are of common use in the industrial area. However, this objective is not easy to achieve because of the physical properties of this material. Its difficulty in welding can be due to several factors such as low plasticity due to its high carbon content, the formation of cementite, formation and growth of pores or other factors that affect or decrease the mechanical properties of the material. In the following research work, the analysis of cold welding and mechanical sewing is shown by means of an experimental process carried out in the gray cast iron joints, applying different variables in the mechanical sewing process considering variables such as the diameter of bolts, distances between bolts and material of the bolts used in the mechanical sewing process for each of them. The procedure of mechanical sewing and cold welding was evaluated by means of specimens which were subjected to traction, hardness and Charpy impact tests and metallographic analysis was also carried out on the base material in order to determine the mechanical properties, the tests were carried out in the laboratories of the Faculty of Civil and Mechanical Engineering of the Technical University of Ambato, later the results were tabulated and analyzed, obtaining as a conclusion that group E is the one that obtained a better behavior, this process being suitable for cold welding and mechanical sewing Finally, through the analysis carried out, this process could be applied in the reconstruction of a block, checking that cold welding and mechanical sewing is applicable in the recovery of gray cast iron components.
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    Estudio de materiales alternativos para el análisis metalográfico mediante réplicas y su incidencia en el costo del ensayo metalográfico no destructivo en uniones soldadas de acero A36
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica., 2011) Lascano Moreta, Alejandra Marlene; Córdova Suárez, Manolo Alexander
    Luego de analizar la problemática de los elevados costos de los ensayos metalográficos no destructivos usando réplicas metalográficas, se determinó que estos costos están directamente relacionados al medio replicante utilizado para obtener las muestras metalográficas, por lo cual el presente trabajo se encamina básicamente a disminuir los costos del ensayo por réplicas metalográficas, mediante el estudio de un material el cual sirva como medio replicante para desarrollar dicho ensayo. Para el desarrollo de éste trabajo, se empezó con la preparación de probetas de juntas soldadas en las cuales se preparó una superficie apta para la aplicación de un ensayo por réplicas metalográficas, posteriormente se experimentó con distintos materiales los cuales a criterio del autor podían servir como medio replicante, éstos fueron aplicados a modo de prueba y error en las superficies preparadas metalográficamente, luego de numerosos ensayos se encontraron materiales aptos para ser usados como medios replicantes, con estos materiales se realizaron nuevos ensayos con el objeto de determinar cuál de ellos ofrecía los mejores resultados tanto en calidad de replicado como en costos. Finalmente se desarrolló un procedimiento el cuál servirá de guía para la aplicación de este material como medio replicante en el ensayo por réplicas metalográficas. Cabe destacar que todo el trabajo se encuentra desarrollado tomando en cuenta el cumplimiento de las distintas normas aplicables a esta investigación.