Mechanical Technology I

Year
3
Academic year
2020-2021
Code
01005855
Subject Area
Mechanical Engineering Sciences
Language of Instruction
Portuguese
Mode of Delivery
Face-to-face
Duration
SEMESTRIAL
ECTS Credits
6.0
Type
Compulsory
Level
1st Cycle Studies

Recommended Prerequisites

Material Science and Engineering, Thermodynamics, Applied Mechanics, Elasticity and Plasticity.

Teaching Methods

The fundamental aspects are presented in theoretical classes. These classes take the form of lectures using slides and videos. In theoretical-practical modules students proceed to the consideration and resolution of problems that illustrate the themes presented. Students participate actively in the process of formation, being asked to comment and discuss some of the topics covered in the course. Two companies in the areas of subjects taught are visited every year.

Learning Outcomes

This course aims to document the students about the technological processes of metal forming by plastic deformation and metal cutting. Moreover, the behaviour of materials when subjected to these processes is analysed and discussed, indicating their particular characteristics and tests used for the characterization of the materials mechanical behaviour.

As advance preparation needed for the study mentioned in the preceding paragraph, are the theoretical and experimental aspects of the material behaviour, during cold and hot plastic deformation. That is, the physical mechanisms of plastic deformation of ductile rupture and recovery of the deformed structure (restoration and recrystallization) are described.

Finally the fundamentals of machining technologies by chip removal, since they correspond to situations of extreme plastic deformation and rupture, are introduced.

Work Placement(s)

No

Syllabus

Mechanisms of plastic deformation (dislocation theory, strain hardening and recovery, plastic deformation of mono-and polycrystalline). Static and dynamic crystallization. Ductile rupture during cold and hot plastic deformation.

Metal forming technologies: rolling, sheet metal forming, extrusion, wire drawing, forging. It is mentioned the specificities of each process and the corresponding tests to characterize the mechanical behaviour of materials.

Methods for plasticity - theory and applications: method of slices (general cases and application to cold and hot rolling) and upper bound method.

Fundamentals of mechanics of orthogonal cutting. Classification and characterization of conventional machining processes.

Head Lecturer(s)

José Valdemar Bidarra Fernandes

Assessment Methods

Assessment
Exam: 100.0%

Bibliography

- P. Baque, E. Felder, J. Hyafil e Y. D'Escatha, Mise en Forme des Métaux - Calcus par la Plasticité, Vol. 1 e 2., Dunod, 1974.

- B. Baudelet, Mise en Forme des Métaux e Alliages, École d'Été de Métallurgie Physique de Villars-Sur-Ollon (Suisse). CNRS, 1976.

- Grupo de Técnicos Industriais e LNETI, Jornadas Nacionais das Tecnologias de Conformação de Metais por Deformação plástica em Chapa (Embutidura e Estampagem), Vol. I., CATIM, DEMEC, 1987.

- M. Vieira, A recristalização Dinâmica em Condições de Deformação a Quente, Relatório da Aula Teórico-Prática das Provas de Aptidão Pedagógica e Científica. Departamento de Metalurgia da FEUP, 1989.

- J. Lemaitre e J.-L. Chaboche, Mechanics of solid materials, Cambridge University Press, 1994.

- Jorge Rodrigues e Paulo Martins, Tecnologia Mecânica, Tecnologia da Deformação Plástica, Vols. I e II, Escolar Editora, 2005.

- Dino Ferraresi, Fundamentos da Usinagem de metais, Ed. Edgard Blucher, São Paulo, Brasil, 2008