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Computer Aided Technical Drawing

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 build a 3D model from the orthogonal projections of a particular piece, using a CAD software tool.

General characterization

Code

10413

Credits

3.0

Responsible teacher

Guilherme António Rodrigues Lavareda

Hours

Weekly - 3

Total - 36

Teaching language

Português

Prerequisites

Basic knowledge of drawing and geometry.

Basic knowledge of the Microsoft Windows 7, 8 or 10 operative systems.

Bibliography

MAIN:
- L. Veiga da Cunha, "Desenho Técnico", 17ª Edição, Fundação Calouste Gulbenkian (2017).

 COMPLEMENTARY:
- Arlindo Silva, João Dias e Luís Sousa, "Desenho Técnico Moderno", 11ª Edição, Lidel (2011).
- Tutorial Books, "NanoCAD 5.0 Basics Tutorial", Draft2digital (2021).

Teaching method

Part I - Initial part of the lesson with exposition of the subjects using examples drawn on the blackboard. Final part with execution of a drawing by students where they apply the knowledge acquired in the previous part.

 

Part II - Initial part of the lesson with introduction to the subjects using specialized software and a projector. Final part with execution of a drawing in computer by the students where they apply the knowledge acquired in the previous part.

Evaluation method

a) Ongoing assessment :

 

Part I - Basics of Technical Drawing (Classroom):

 

   - 1st Assessment Test (conventional drawing).

 

Part II - Computer Aided Design (Computer Lab.)

 

   - 2nd Assessment Test (CAD).

 

Exemption from final exam:

   - Tests grade average equal or greater than 9.5.

 

b) Assessment by Final Examination:

 

   - Examination test (CAD).

 

 

Final classification:

 

    - With exemption of final exam: Test grade average.

    - Without exemption of final exam: Exam grade.

 

Additional information:

In any evaluation test (either ongoing assessment or exam), a complementary oral test may be required by teachers to clarify students'' knowledge or to defend a grade.

Subject matter

PART I – BASIC TECHNICAL DRAWING

  • Introduction. Tools for drawing. Line types and thicknesses for technical drawing.
  • Orthographic projections. ISO and ANSI standards. Choice of the necessary and sufficient views.
  • Representation of Cuts and Sections. Types of Cutaway. Conventional representation and elements that do not cut lengthwise.
  • Dimensioning. Types and placement of dimensions. Tolerances.
  • Drawing of Connecting Elements. Representation of threaded parts. Types of Thread. Bolts, nuts, washers and keys. Dimensioning of connecting elements.

 

PART II – COMPUTER-AIDED DRAWING (CAD):

  • Basic tools. Initial set-up. Coordinate systems.
  • 2D drawings - entity creation and edition. Entity grouping. Advanced tools.
  • Drawing method in 2D CAD.
  • Automatic hatching and automatic dimensioning.
  • Introduction to modeling and three-dimensional shapes.