Caracterización metalográfica, evaluación de propiedades mecánicas del acero M303, comparación y sustitución entre los aceros 17-4PH Y AISI 420

Abstract

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.