Diseño y construcción de un horno para implementarlo en la máquina para ensayos de termofluencia del laboratorio de resistencia de materiales de la ESPOCH

Abstract

The thermofluence testing machine of the ESPOCH’s materials resistance laboratory presented specific difficulties at the time of operating and maintaining the equipment in charge of managing the constant temperature. For this reason, we proceeded to design and build an over to implement in the machine of thermofluence. During the development, the most suitable materials for the main parts of the stove were selected, which are: the heat source, heating chamber, and insulating coating. From this selection, a thermal analysis was carried out to determine temperatures through the oven wall as surface temperature. Besides, the pins that will support the tensile load applied by the machine were designed, and an analysis of the weld seam was included to ensure the stability and support of the oven weight. With this design, the construction and assembly of the equipment with its automation was carried out thanks to LOGO PLC, allowing us to make an ON/OFF control. Hence, the temperature is uniform during the test. We check the correct functioning of the equipment by testing an A36 steel specimen and a nodular cast iron specimen until it reaches its fracture. Finally, the oven functional and with a working temperature of up to 750 degrees Celsius. To continue the machine’s improvement is recommended to install a virtual control and monitoring system, allowing the recording of data such as load, temperature, and deformations from any part having a computer with internet service, and thus avoid the presence of the operator next to the machine during the whole test.