Maestría en Mecánica Mención Diseño

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    Estudio del estado actual de máquinas y equipos del área de inyección de accesorios de PVC de la empresa Holviplas S.A. a través de los registros de falla mediante la ley de Weibull
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Mecánica Mención Diseño, 2020-09) Poaquiza Rivera, Nelson Rodrigo; López Velástegui, Jorge Enrique
    At present, maintenance at the company level is important, which consists of planning certain measures dedicated to the condition of machines and equipment that has as its primary objective to determine the reliability and availability, with this it is intended to know the optimal operating conditions, reducing the failure rate, downtime and thus increase the life of the elements and the productivity of the company. It began with the determination of technical data sheets and the collection of data on maintenance activities recorded for each machine and equipment in the area, where operating times (To), repair time (TR), downtime (TP) were obtained and the mean time between failures (TPEF), mean time between repairs (TPPR), failure rate, reliability, and availability (D) were analyzed. Afterwards, the analysis was made by means of a statistical tool according to the NTP331 Weibull analysis, to determine the reliability by the mathematical method and graphic model for each machinery, which facilitated to issue a relevant criterion on the graphs of the curve of the bath and the stages that each machine and equipment are in. Also according to the Standard NTP 679 AMFE, the crucial components to suffer failures were identified through a matrix of weighted criteria, in which the risk priority number (NPR) of each system was obtained, which indicates the actions that must be taken for each component with greater (NPR) of the machinery. A specialized software was developed that allows and facilitates the calculation of the characteristic parameters of the Weibull function, as well as the reliability measurement parameters such as: failure rate, failure probability, time between failures, availability, etc. The program requires the entry of the historical data of operation times ordered from minor to major either manually or by means of an excel file by the selected method. Several practical tests were carried out to check the scope and it was possible to obtain a program that is capable of calculating the mentioned parameters and also of graphing with a precision at the level of some commercial softwares, with a simple user interface. The software developed is intended in the future to be applied to multiple machines and equipment from different companies, whether they are manufacturing companies or any other activity that requires an industrial maintenance strategy.