Ingeniería Mecánica

Permanent URI for this collectionhttp://repositorio.uta.edu.ec/handle/123456789/900

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Subject: search.filters.subject.AMBIENTES CONTROLADOS

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    Análisis del proceso de aplicación de pintura líquida para componentes de transformadores y la evaluación de la resistencia del recubrimiento bajo ambientes controlados
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2023-03) Manosalvas Buenaño, Erick David; Analuiza Maiza, Oscar Iván
    Due to the lack of necessary analyses for liquid paint coatings and addressing the need to perfect them, with which the characteristics of their components and application processes could be improved, this research is proposed. The objective of the present work is to analyze the application process of liquid paint for transformer components and the evaluation of the coating resistance under controlled environments. The type of research used in the work was: explorative, descriptive, explanatory and bibliographic. The sample and therefore the controlled conditions for the analysis were defined with the Taguchi L32 design of experiments, which has 16 combinations and two replicates. After the research, it was possible to determine the critical requirements that a given coating must meet in the base material to be subjected to their respective tests. The standards applied for each of the tests were the following: adhesion (NTE INEN 1006), impact (NTC 877), double (NTE INEN 1002:98) and salt chamber (ASTM B117 - 19, ASTM D610 - 08, ASTM D714 - 02). It is concluded that the statistical analysis of the coating properties indicated that: the type of paint is influenced by the curing temperature; also, the behavior of the component to the different types of surface preparation (shot blasting, phosphatizing) depends on the number of layers (bilayer, trilayer), achieving the objectives set out in this qualification work.
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    Análisis del proceso de aplicación de pintura electroestática en polvo para componentes de transformadores y la evaluación de su adherencia y anclaje bajo ambientes controlados
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2022-09) Zamora Valencia, Klever Mauricio; Pérez Salinas, Cristian Fabián
    Currently, electrostatic powder coatings are gaining more reliability and applicability in the national industry, in the metal-mechanical segment and electrical cabinets. Therefore, in order to determine each one of the controlled environments and their respective specimens, we proceed with this research to determine their resistance to each one of the tests. In the present experimental work, the controlled environments to be used were analyzed for the population of transformer components in which electrostatic powder paint was applied, elaborated under control conditions in which the type of paint, adhesion voltage, surface preparation and curing temperature were addressed. The properties of adhesion, impact, bending and saline chamber were determined according to the standards collected, within which the necessary conditions were stipulated to carry out the pertinent tests. Thus, there were two groups of data, quantifiable and categorically estimable, the first ones were statistically reviewed and the second ones according to what could be observed according to the criteria of the standard used.
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    Estudio de la aleación de aluminio 6063-T5 utilizada en pasamanos de buses para disminuir el riesgo de contaminación biológica con ensayos en ambientes controlados
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2017) Martínez Barrera, José Stalin; Espín Lagos, Segundo Manuel
    In this study the main objective is to analyze the reduction of biological contamination on bus’s handrails made of aluminum alloy 6063-T5. Many tests had been performed in typical handrail’s material samples under controlled environments to determine whether to find antimicrobial properties or not in these material. The experimental investigation was performed to determine mechanical properties of aluminum alloy 6063-T5 and also biological test methods to investigate whether or not the inhibition of bacterial growth. Recount method on aluminum alloy 6063-T5 samples to establish the number of bacteria found with two sample replicates and dilutions using the laminar flow cabinet and laboratory incubator. Finally, to estimate the number of viable bacteria in the samples, we use the colony-forming unit (CFU/ml) to determine which material response with positive antimicrobial properties and it was possible to find that AA6063-T5 is not recommended to be use in bus’s handrails and all the others aluminum alloys with high levels of copper in their chemical composition are well suited due to its antimicrobial properties under the technical recommendation of the Environmental Protection Agency - EPA