bachelorThesis
Dimensionamento das engrenagens de uma caixa de redução de um protótipo tipo Baja
Fecha
2021-08-26Registro en:
FERNANDES, Lucas Antonio; VIVI, Victor Henrique Gonçalves. Dimensionamento das engrenagens de uma caixa de redução de um protótipo tipo Baja. 2021. Trabalho de Conclusão de Curso (Bacharelado em Engenharia Mecânica) - Universidade Tecnológica Federal do Paraná, Ponta Grossa, 2021.
Autor
Fernandes, Lucas Antonio
Vivi, Victor Henrique Gonçalves
Resumen
The referent work presents the development of a transmission system for a Baja prototype. Basic concepts of the transmissions most used in vehicles and the main components that make up the system will be explained, such as gears, transmission shaft and gear keys. The work motivation originated in a during a competition in which one of the gears of the transmission box suffered flexural fatigue and the team had to end its participation. By deepening in the transmission studies, a transmission ratio was designed for the gearbox, seeking to select the most suitable material for the gears and it’s keys. According to the materials science literature, two materials were selected that were most recommended for this application and specimens were dimensioned that were manufactured by means of a lathe by numerical command and the treatment of quenching followed by tempering was selected. Several temperatures were selected to subsequently carry out mechanical tests of traction and hardness to determine which combination will result in the best mechanical properties for application in gears. After selecting the materials, the SAE 4340 steel quenched and tempered at 400ºC was selected and a study was carried out to dimension the gears and its keys in order to reduce mass without losing torque transmission capacity. The results obtained are two pairs of gears that in tests with the prototype met expectations, increased its life expectancy and made it more competitive.