Computer Aided Technical Drawing
Code
10413
Academic unit
Faculdade de Ciências e Tecnologia
Department
Departamento de Ciências dos Materiais
Credits
3.0
Teacher in charge
Carlos Alberto Nunes de Carvalho, Guilherme António Rodrigues Lavareda
Weekly hours
3
Teaching language
Português
Objectives
- To draw the orthogonal projections of a particular piece.
- To choose the sectioning planes and their cutting surfaces, necessary for a perfect understanding of the drawing.
- To recognize the drawing elements that must not be cutted and represent them.
- To recognize the drawing elements where dimensioning must be done.
- To draw the orthogonal projections of a particular piece, using a CAD software tool.
- To buid a 3D model from the orthogonal projections of a particular piece, using a CAD software tool.
Prerequisites
Basic knowledge of drawing and geometry.
Basic knowledge of the Microsoft Windows 7 / 8 operative system.
Subject matter
PART I - BASIC TECHNICAL DRAWING
- DRAFTING TABLE.
- TECHNICAL PENCILS AND PENS.
- TOOLS FOR DRAWING: rulers; compasses; triangles; t-squares,.......
- TYPES OF LINES : visible; hidden; center; cutting plane; section,....
- ORTHOGRAPHIC PROJECTIONS: ISO and AMERICAN standards.
- AUXILIARY VIEWS.
- INTERSECTIONS.
- CUTS and SECTIONS: areas on cuts and sections.
- REPRESENTATION OF SCREW PARTS/INSERTS.
- DIMENSIONING: linear and angular dimensions.
- TOLERANCES.
- INDICATION OF SURFACE TEXTURE.
- PERSPECTIVE PROJECTIONS.
PART II -COMPUTER-AIDED DRAWING (CAD):
- Basic tools. Coordinate systems.
- 2D drawings - entity creation and edition. Entity grouping. Advanced tools.
- Sectioning and dimensioning.
- 3D drawings
- Solid modeling
Bibliography
- L. Veiga da Cunha, "Desenho Técnico", 14ª Edição, Fundação Calouste Gulbenkian (2008).
COMPLEMENTAR:
- Arlindo Silva, João Dias e Luís Sousa, "Desenho Técnico Moderno", 11ª Edição, Lidel (2011).
- Randy H. Shih, "Exploring DraftSight", SDC Publications (2012).
Teaching method
Classes will include a theory part, followed by the execution of exercise drawings or the drawing of a small metallic piece.
Evaluation method
Continuous valuation (Basic TD):
- 2 tests (T1, T2).
- Exemption of final exam: arithmetic average of T1 + T2 superior to 9,5 marks, none of them inferior to 7,0 marks.
Valuation with final exam (Basic TD):
- Exam (E).
Valuation of CAD:
- One Valuation (OV).
Final valuation:
- With exemption of final exam: (2/3)*[(T1+T2/2]+(1/3)*OV.
- Without exemption of final exam: (2/3)*E+(1/3)*OV.