Technical Drawing

Code:

L.EA003

Acronym:

DT

Keywords
Classification	Keyword
OFICIAL	Technological Sciences - Engineering

Instance: 2021/2022 - 1S

Active?	Yes
Responsible unit:	Industrial Design Section
Course/CS Responsible:	Bachelor in Environmental Engineering

Cycles of Study/Courses

Acronym	No. of Students	Study Plan	Curricular Years	Credits UCN	Credits ECTS	Contact hours	Total Time
L.EA	49	Syllabus	1	-	3	26	81
L.EMG	11	Plano de estudos oficial a partir de 2008/09	1	-	3	26	81

Teaching language

Suitable for English-speaking students

Objectives

Introduction of the concept of standardization in general and its importance in Engineering. Acquisition of solid knowledge about object representation, in terms of their geometry and nominal dimensions. Development of spatial visualization and technical communication skills, through the reading of drawings in orthographic representation. Development of technical communication skills, through the execution of drawings in isometric representation. Introduction to the concepts of Geometric Product Specification (GPS), through the exploration of the concepts of tolerance and interchangeability and a developed study of dimensional tolerance. Transmission of basic concepts about standard general purpose mechanical systems and components. Introduction to schematic drawing.

Learning outcomes and competences

At the end of the term, students should be able to:

1) Elaborate drawings of objects in orthographic representation and with nominal dimensions.

2) Read drawings of objects in orthographic representation and make the corresponding perspective representations in isometric axonometry.

3) Interpret the meaning of different tolerances inscribed in technical drawings and solve simple dimensional tolerance problems.

4) Identify different standardized mechanical components existing in some mechanical systems currently in use; select its characteristics; know its representation in drawing and the elementary mechanical functions performed.

5) Read simplified representations of piping.

Working method

Presencial

Pre-requirements (prior knowledge) and co-requirements (common knowledge)

Pre-requirements:

- Basic notions about drafting and drawing instruments (secondary school).

- Fundamentals of plane and solid Euclidean geometry (secondary school).

Program

The syllabus of the curricular units includes the following topics:

1) STANDARDIZATION in general and in technical drawings.

2) TECHNICAL PRODUCT DOCUMENTATION: scales, drawing supports, ISO writing and lines. Types of projection systems. Brief references to the dihedral method.

3) ORTHOGRAPHIC REPRESENTATIONS: general principles of representation of views, selection of views, partial views, auxiliary views, sections and sections. Reading of drawings in orthographic representation.

4) QUOTATION AND INDICATION OF TOLERANCES: general principles; measuring angles and inclinations in prisms; dimensioning of cones; dimensioning of profiles; nominal dimension theory and preferred nominal dimensions.

5) PERSPECTIC REPRESENTATIONS: axonometric representations (isometric drawings).

6) GEOMETRIC PRODUCT SPECIFICATION (GPS): the GPS concept; fundamental principle of tolerance; dimensional and geometric tolerances; general tolerances; indication of surface states.

7) GENERAL PURPOSE STANDARD MECHANICAL SYSTEMS AND COMPONENTS: types of components, their design representations and standard designations; detachable connections for threaded parts.

8) Introduction to schematic drawings: simplified representation of PIPES.

Mandatory literature

José Manuel de Simões Morais; Desenho técnico básico. ISBN: 972-96525-2-X
Francisco xavier de Carvalho; Desenho Técnico

Teaching methods and learning activities

Classes work in a theoretical-practical regime.

In each class there is a brief exposition of the syllabus referring to each module of the course, illustrated by the presentation of some application examples, interspersed with the realization, by the students, of exercises considered relevant and which are, mostly, included in the course support texts.

keywords

Technological sciences > Engineering > Project engineering
Social sciences > Communication sciences > Graphic communication
Technological sciences > Technology > Measurement technology
Technological sciences > Technology > Graphic techniques

Evaluation Type

Distributed evaluation without final exam

Assessment Components

Designation	Weight (%)
Teste	80,00
Trabalho escrito	20,00
Total:	100,00

Amount of time allocated to each course unit

Designation	Time (hours)
Estudo autónomo	55,00
Frequência das aulas	26,00
Total:	81,00

Eligibility for exams

The discipline frequency implies that the absences limit is not exceeded (25% of the number of planned classes).

Calculation formula of final grade

Final classification = 0.8 * Minitests + 0.2 * Papers

on what :

Minitests Component - two minitests to be performed throughout the semester;

1st Minitest: Test on the "Representation and Quotation" chapters - Weight of 45%.

2nd Mini-test: Test on the chapters "Reading" and "Dimensional tolerance", with the respective weights of 40% and 15%.

Note: Each test is subject to a minimum score of 6.0 values.

Works Component - two individual works to be carried out during the semester;

1st Work related to the chapter "Representation and quotation" - Weight of 10%.

2nd Work related to the "Reading" chapter - Weight of 10%.


Carrying out the three individual resolution exercises, on the dates previously indicated for the 2 mini-tests provided, is a necessary condition for considering the existence of a minimum number of elements that allow for a correct assessment of each student.

An optional Appeal Test is planned (with a partial character: one of the two mini-tests).

Obtaining a final classification above 18 points implies the need to take a complementary test.

Special assessment (TE, DA, ...)

The special exam periods are carried out in accordance with sub-paragraphs a) and b) of number 3 of article 4º of the General Evaluation Rules.

Classification improvement

The classification improvement test is carried out in accordance with article 10º. of the General Valuation Rules.