Browsing by Author "Salazar Freire, Mayra Isamar"

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    Diseño de la estación y selección de equipamiento para la cabina de metalizado de turbinas hidráulicas de CELEC EP-HIDROAGOYAN
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2017-08) Salazar Freire, Mayra Isamar; Núñez Núñez, Diego Fernando
    The process of metallizing by the technique of High Velocity Oxy Fuel (HVOF) is practically based on the use of a high kinetic energy and a relatively low temperature, in which the supply material is supplied as a powder, Center of the accelerated flame at supersonic velocities towards the surface of the part; Resulting in a coating of high hardness, density and strength, which is suitable for applications including erosion, friction, shock and abrasion wear, which are the main phenomenons presented by hydraulic turbines. In addition, the manufacturing processes currently depend on automatic or automation equipment, such as manipulator robots that are very helpful thanks to the precision, flexibility and programmability they possess so they can be adapted for the execution of different tasks by What, to automate the process would be beneficial to obtain finishes of better quality, more precise, fast, efficient.
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    Evaluación de costos de mecanizado por arranque de viruta para aceros inoxidables ASTM a743 grado CA6-NM y soldadura ER312 y ER410 para el CIRT-CELEC EP
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Mecánica Mención Manufactura, 2021) Salazar Freire, Mayra Isamar; Cabrera Anda, Santiago Paúl
    The research project focuses on the analysis of milling and turning costs in hydraulic turbine impellers. This is important because the machining parameters were evaluated and how they affected the useful life of the inserts used for roughing stainless steel ASTM A743 grade CA6-NM, base material, and ER 312 and ER 410 welding. For this purpose, the machining costs were experimentally compared with different cutting tools to establish variables and their relationship with the final machining cost. The present study had a qualitative and quantitative approach in which variables, which intervened in the machining process by chip removal, were handled. The parameters used for each of the cutting tools were the following based on those recommended by the manufacturer of each one as shown below: TD1 Vc=225 (m/min), TD2 gives 270 (m/min), TD3 gives 100 m/min and TD4 = 250 m/min, for the turning process. Giving from this group the Taylor slope 0.79, while the data offered by stainless steel A743 with ER 410 welding gives n=0.8 and stainless steel A743 with ER 312 welding gives = 0.87. For the milling process, the following parameters were also considered: FD1 Vc=120 (m/min), FD2 Vc=120 (m/min), FD3 Vc=235 (m/min) and FD4 Vc=400 (m/min). On the other hand, the costs of using machinery and consumables in the order of the inserts detailed above were 16.67, 19.38, 16.12 and 10.11dollars, respectively. Finally, the hypothesis was validated, defining as optimum parameters the type of insert, cutting speed and recommended feed rate, concluding with the experimental comparison of the different inserts and fulfilling the proposed objectives.