Ingeniería Civil y Mecánica

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Subject: search.filters.subject.HERRAMIENTA DE CORTE

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    Desarrollo de un sistema híbrido “Plug and Play” de lubricación pulverizada con nanofluido y fluido criogénico para mejorar los procesos de mecanizado por arranque de viruta torneado
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Mecánica Mención Manufactura, 2021-07) Arias Soto, Diego Rafael; Núñez Núñez, Diego Fernando
    The present research work focuses on the development of a hybrid system, which increased the surface quality of the machined material; CO2 was used for the cryogenic fluid and the MQL system with biodegradable oil Unist Coolube 2210 EP with TiO2 nano particles as additive for the spray lubrication. The system was evaluated using an experimental methodology applying a design of experiments of 8 runs where it was proposed to run the experiments with cutting speeds of 235 and 195 m/min and feeds of 0.1 and 0.2 mm/rev using a cutting tool, a sintered carbide insert CNMG120408 in a material applicable in the Ecuadorian industry such as API L80 steel pipes with an outer diameter of 3.5 inches. For the measurement of the surface finish, a measuring instrument, the Mitutoyo SJ-210 roughness meter, was used, while for the measurement of the cutting tool flank wear, the VB life criterion equal to 300 micrometers in zone B of the insert established by the ISO3685 standard was evaluated with the help of SEM scanning microscopy. The results obtained were favorable since an increase in the cutting tool life of up to 40 percent was obtained, while in the surface finish minimum Ra roughness of 0.4 micrometers was achieved; therefore, it was possible to establish that the proposed system is efficient in this machining process.
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    Diseño y construcción de máquina rotativa de corte longitudinal de planchas de acero galvanizado de 1 mm de espesor en la empresa Carrocerías “IBIMCO S.A.”
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2017) Iza Carrillo, Edgar Vinicio; Guamanquispe Toasa, Jorge Patricio
    For the execution of the project the shear cutting process was investigated by means of an unconventional system which allows longitudinal cuts of dimensions larger than those established for a standard metal plate, from which different design alternatives were determined. Of these, the circular blade cutting system was selected as the main mechanism, which consists of a combined transmission of chains, catars, pulleys and belts, as well as a power reducer and a three-phase electric engine. The parameters specific to parts and components were designed taking into account the actual conditions on which the machine will work in addition to safety factors recommended by entities such as ASTM-HANDBOOK. Once the design and construction were carried out, the functional tests were carried out where it was verified that with the implementation of the machine clean cuts can be made with minimum tolerances, reducing the 40% of time during the cutting process in relation to the conventional process used in the company.