info:eu-repo/semantics/bachelorThesis
Caracterización metalográfica, evaluación de propiedades mecánicas del acero M303, comparación y sustitución entre los aceros 17-4PH Y AISI 420
Fecha
2022-12-22Registro en:
Escalante Castillo, Andrés Patricio; Casa Chimba, Cristian Geovanny. (2022). Caracterización metalográfica, evaluación de propiedades mecánicas del acero M303, comparación y sustitución entre los aceros 17-4PH Y AISI 420. Escuela Superior Politécnica de Chimborazo. Riobamba
Autor
Escalante Castillo, Andrés Patricio
Casa Chimba, Cristian Geovanny
Resumen
The objective of this project was to design and implement the drive system for the pendulum
impact tester at Mechanics Faculty, by means of an electromechanical lifting system. It was
installed in the bridge crane of the foundry laboratory Mechanics Faculty and a mechanical device
for its release. The design parameters of its components were obtained from operating conditions
and literature review. The design methodology based on the DIN VDI 2225 standard was used.
A winch type lifting system coupled to a quick load release hook was proposed. Developing the
mathematical model as a function of the mass of 1500 kg pendulum impactor. A winch-type
lifting system was designed, required to reach a maximum angular position of 45° in 16 seconds
and consisting of the following elements: electric motor, belt - driven, a speed reducer and a drum
for the steel cable winding. A mechanical device with a desmodromic mechanism to release the
load, complemented with hoisting accessories, was designed to hold the impactor. The finite
element method was also used to design removable reinforcement elements to ensure the stability
of the bridge crane in the critical operating condition, without affecting its normal operation. To
validate the design of the pendulum drive system, operational tests have been carried out. After
the tests, it was possible to conclude that the implemented system provides greater safety for the
operator, greater efficiency in the execution time of the tests and greater precision in the release
of the impactor. Subsequently, recommendations have been made with the objective of improving
the precision in the elevation during the execution of the impact tests, as well as to extend the
useful life of the system.