Publication in the Diário da República: Despacho nº 14433/2024 - 05/12/2024
5 ECTS; 3º Ano, 2º Semestre, 30,0 T + 30,0 TP + 4,50 OT , Cód. 912363.
Lecturer
- Jorge Manuel Afonso Antunes (1)(2)
(1) Docente Responsável
(2) Docente que lecciona
Prerequisites
Mechanics and Waves, Applied Mechanics, Mechanics of Materials
Objectives
Students should become familiar with the design and selection of clutches, brakes, sliding bearings, ball bearings, belt drive components, chain drive components, gear drive components, gear trains.
Program
1. Gears
1.1. Classification
1.2. Fundamental law of gearing
1.3. Terminology
1.4. Tooth profile
1.5. Geometric relationships
1.6. Generation cutting
1.7. Continuity of meshing
1.8. Transmission ratio
1.9. Interference
2. Spur gears
2.1. Dynamic analysis
2.2. Design against bending failure
2.3. Design against surface contact pressure
3. Helical cylindrical gears
3.1. Dynamic analysis
3.2. Design against bending failure
3.3. Design against surface contact pressure
4. Bevel gears
4.1. Dynamic analysis
4.2. Design against bending failure
4.3. Design against surface contact pressure
5. Skew gears
5.1. Design against bending failure
5.2. Design against surface contact pressure
6. Bearings
6.1. Types of bearings
6.2. Specification
6.3. Bearing clearance
6.4. Bearing selection
7. Belts
7.1. Main relationships and nomenclature
7.2. Dynamic analysis
7.3. Transmitted power and torque
7.4. Pre-tensioning force
7.5. Loads induced on the shaft
7.6. Belt selection
8. Chains
8.1. Main relationships and nomenclature
8.2. Polygonal effect
8.3. Load analysis
8.4. Shaft loads
8.5. Chain selection
9. Shaft design
Evaluation Methodology
Students are assessed, one of the four evaluation periods established by the institution through written tests. The written test will take a minimum of 9.5 for approval.
Bibliography
- Antunes, J. (2022). Órgãos máquinas II. Abrantes: Apontamentos do docente
- Shigley, J. (2013). Mechanical Engineering Design. (Vol. I). (pp. 1-1248). EUA: McGraw-Hill
- Silva Ribeiro, A. e Domimgo Costa, J. e Ferreira, J. e Moura Branco, C. e , . (2005). Projecto de Órgãos de Máquinas. (Vol. 1). Portugal: Calouste Gulbenkian
Teaching Method
Theoretical classes describes and illustrates the application of fundamental principles. Theoretical and practical classes are propose solving practical cases.
Software used in class
PowerPoint.
