• Low cost semi-industrial 3GDL CNC vertical milling center design with non-ferrous metal machining capability

      Shimabukuro, Satoshi; Diaz, Piero; Vinces, Leonardo (Institute of Electrical and Electronics Engineers Inc., 2020-09-01)
      This work proposes the design of a low cost semi-industrial three degree of freedom CNC vertical milling center (VMC) with non-ferrous metal machining capabilities. The design seeks to mitigate the difficulties that acquiring a commercial industrial CNC can present, such as large dimensions, high cost and complications in its transportation within the plant. The proposed machine will be made up of 1 NEMA 23 stepper motor for each X, Y and Z axis, and will be controlled by open source firmware using an ATMEGA 2560 microcontroller. Likewise, the working area will be 320x180mm and will have a precision 100 microns with semi industrial capacities. This design is aimed at small and medium-sized companies that are looking for a low cost non-ferrous CNC milling machine that in turn has the quality, performance and precision of an industrial one.
      Acceso restringido temporalmente
    • A Mechanical Development of a Dry Cell to Obtain HHO from Water Electrolysis

      Salazar, Gustavo; Solis, Wilmer; Vinces, Leonardo (2021-01-01)
      This article proposes a mechanical development of a dry cell in order to obtain HHO through water electrolysis. Calculations and technical specifications of the materials used for implementation are supported by mathematical, physical and chemical formulas and theories (Faraday´s Law, electrolysis process and mechanical design). The importance of mechanical design is focused on achieving efficient use of the energy provided to the cell that allows the H2 and O2 molecules to be separated without overheating the cell, evaporating the water, loss of current due to the geometry of the electrodes (Foucault Current). Moreover, choosing materials for proper implementation and physical robustness is mandatory. In addition, the mechanical design is not justified in different articles. Nevertheless, the mechanical design of the cell and the efficiency in the production of HHO are related. Therefore, the mechanical design and the calculations were performed, as well as the construction of the dry cell to obtain HHO. The results of the implementation and production were placed and compared with what theoretically the dry cell should produce from the law of Faraday. Finally, the volumetric flow of HHO obtained was 2.70 L per minute. It means a production efficiency of 98.68%. It is higher than the majority of the dry cells.
      Acceso abierto
    • Study of internal flow of a bipropellant swirl injector of a rocket engine

      Rivas, Julio R. Ronceros; Pimenta, Amílcar Porto; Salcedo, Saulo Gómez; Rivas, Gustavo Adolfo Ronceros; Suazo, Marie C. Girón; pcmajron@upc.edu.pe; marie.giron@upc.edu.pe; amilcar@ita.br; gustavo_ronceros@hotmail.com (Asociacion Interuniversitaria de Investigacion en Pedagogia, 2018-06)
      The main objective of this research was to determine the differences among the components of burnout in professors from a private university in Lima according to socio-demographic variables. With this aim in mind, a comparative descriptive research design was used. Also, a specific sample quota was not applied. We collected a total population composed of 260 professors of humanities at said educational institution who teach the following courses: Language, Research, Ethics and Citizenship and Creativity Workshop. In addition, we used the Maslach Burnout Inventory Adaptation and a socio-demographic record handout for university professors as measuring instruments. Finally, from the processing and statistical analysis of the data obtained, we found the following: there are significant differences in the levels of emotional exhaustion by sex and class schedule; also, personal fulfillment according to age, marital status, specialty, highest level of educational attainment and years of teaching experience, among other results. Some results of previous research were corroborated or refuted, especially in relation to the variables sex, age, marital status, level of education and class schedule. Also, from this research, it was identified that the place of undergraduate studies, specialty and years of teaching experience, aspects not studied in depth in the previous studies, could be variables associated with some components of burnout. Finally, in addition to the significant differences mentioned, it was concluded that there are average levels of emotional exhaustion, depersonalization, distortion of the work environment, personal and professional fulfillment in the teachers who formed the study sample. © 2018 Asociacion Interuniversitaria de Investigacion en Pedagogia.
    • A Vibratory Conveying System for Automatic Sorting of Lima Beans through Image Processing

      Injante, Hugo; Gutierrez, Esteban; Vinces, Leonardo (Institute of Electrical and Electronics Engineers Inc., 2020-09-01)
      In order to comply with lima beans peruvian export standards, this study develops an automatic sorter machine. This system uses vibratory conveying to linearly move the grains and to allow their faces to rotate. In addition, image processing algorithms were used for the detection and rejection of defective lima beans. After performing 2200 sorting tests, an industrial performance with an efficiency of 96.81% in acceptance and 95.26% in product rejection was obtained
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