Projeto Integrado de Engenharia Mecânica Dimensionamento de um Eixo-Árvore

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Abstraat

The design of a loom (mechanical) machine is based on meeting the needs of its application and on the expectation of its performance, in addition to considering the best cost-benefit relationship among the viable material and process options for its manufacture.

The specifications elaborated with the use of calculations, projections and analysis of the working conditions define the material options; However, the choice of the manufacturing process usually does not follow a clearly defined procedure because of the specificities involving the various existing processes and the lack of engineering criteria to evaluate its applicability to obtain a certain projected component. In this way, the project is usually exposed to the various influences on the choice of the manufacturing process that can impose technical limitations on it.

This fact occurs mainly when carbon and low alloy steels are indicated for the components which, in this case, can be manufactured by various processes. Doubts are even greater when the decision to manufacture them oscillates between smelting and forging processes, traditional competitors, surrounded by innumerable variables, whose technologies are usually little known to designers.

In this context, this research presents the productive aspects of both processes for the use of a good mechanical component, which was developed from requirements established at the beginning of the project.

Initial data were collected and, from these, all necessary sizing calculations were done and the final mechanical design drawing was done, based on the values ​​of the components present in the equipment and based on the knowledge acquired during the course of mechanical engineering ( Mechanical Integration Project).

Índice

Pag.

Agradecimentos ------------------------------------------------------------------------------------ 3

Resumo --------------------------------------------------------------- ------------------------------ 4

Abstraat ----------------------------------------------------------------------------------------------- 5

Lista de Tabelas ----------------------------------------- ------------------------------------------- 7

Lista de Gráficos ------------------------------------------------------- ---------------------------- 7

Simbologia ---------------------------------------------------------------------------------------------7

Objetivos ---------------------------------------------------------------- -------------------------------8

Justificativa - ----------------------------------------------------------------------------------------- 9

Introdução- -------------------------------------------------------------------------------------------- 10

Projeto Solicitado- -----------------------------------------------------------------------------------11

Generalidades - --------------------------------------------------------------------------------------- 12

Apresentação de Cálculos e Resultados -----------------------------------------------------20

Conclusão --------------------------------------------------------------------------------------------- 36

Bibliografia -------------------------------------------------------------------- ------------------------ 37

Anexos --------------------------------------------------------------------------------------------------- 39

Lista de Tabelas

Tabela nº 1 - Representação do momento fletor nos pontos ------------------------ 23

Tabela nº 2 - Resumo dos cálculos, na conceção do projeto ------------------------- 34

Tabela nº 3 - Resumo das constantes dadas e calculadas ----------------------------- 35

Lista de Gráficos

Gráfico nº 1 - Representação Gráfica do Esforço Transverso-------------------------- 23

Gráfico nº 2 - Representação Gráfica do Momento Fletor ------------------------------ 23

Simbologia

Factor de serviço

n

Factor de acabamento superficial

Ka

Fator de tamanho

Kb

Fator de confiabilidade

Kc

Fator de temperatura

Kd

Fator de concentraçao de tensoes

Se

Fatores de correção da resistência a fadiga

Ke

Calculo do limite de resistência a fadiga do material

Sy

Mpa

Limite de resistencia

Sut

Mpa

Tensão

Τm

Tensão

σa

[pic 2]

σa

[pic 3]

Τa

diametro

d

m

Angulos

¥

Rad