Technical Drawing

Code:

EM0006

Acronym:

DT

Keywords
Classification	Keyword
OFICIAL	Drawing

Instance: 2007/2008 - 1S

Active?	Yes
Web Page:	http://www.fe.up.pt/~fonseca/dtlem/dtlem.html
Responsible unit:	Industrial Design Section
Course/CS Responsible:	Master in Mechanical Engineering

Cycles of Study/Courses

Acronym	No. of Students	Study Plan	Curricular Years	Credits UCN	Credits ECTS	Contact hours	Total Time
LEM	0	Plano de estudos de transição para 2006/07	1	5	5	56	133
MIEM	208	Syllabus since 2006/2007	1	-	5	56	133
		Plano de estudos de transição para 2006/07	1	-	5	56	133

Teaching language

Portuguese

Objectives

BACKGROUND

In the present global market, engineers and technologists must be more and more visually literate to successfully face the increasing use of graphical communication of technical information. Technical drawing is a globally standardized graphical language for technical communication in all engineering fields. In this context, technical product documentation (including technical drawings) is the only established mean of communication and serves as a basis for interpretation of contracts.

SPECIFIC AIMS:

Introduction of the concept of Standardization in general and of its importance in Engineering. Acquisition of deep knowledge about the representation of the nominal shape and dimensions of objects. Development of spatial visualization and technical communication skills. Introduction to the concept of Geometrical product specification (GPS). Acquisition of basic knowledge about surface development methods. Introduction to diagrammatic drawings. Development of the ability to establish relationships between real mechanical systems for general use and their assembly drawings. Technical skills acquired in this Unit are important for disciplines like Mechanical Engineering Drawing, Computer Aided Design and Manufacturing and Introduction to Machine Design.

PREVIOUS KNOWLEDGE

- Basic notions about drafting and drawing instruments (secondary school).
- Fundamentals of plane and solid Euclidean geometry (secondary school).
- Elements of descriptive geometry (secondary school).

PERCENTUAL DISTRIBUTION

Estimated percentual distribution for the scientific and technological contents:
- Scientific component: 40 %.
- Technological component: 60 %.

LEARNING OUTCOMES:

At the end of the course, the students shall be able to:

1) Make drawings of objects in orthographic representation and with nominal dimensioning.
2) Read drawings of objects in orthographic representation and make the correspondent pictorial representations (isometric drawings).
3) Interpret the meaning of the dimensional tolerances inscribed in drawings and determine the ISO fits that fulfils the design requirements previously established.
4) Make the developed views of polyhedral and single-curved surfaces.
5) Identify different standardized mechanical components present in some mechanical systems for general use; know their representation in assembly drawings and the accomplished elementary mechanical functions.
6) Make simple linear and angular measurements.

Program

STANDARDIZATION in general and in technical drawings. TECHNICAL PRODUCT DOCUMENTATION: scales, drawing media, ISO lettering and lines. Types of projection systems. Short references to the dihedric method. ORTHOGRAPHIC REPRESENTATIONS: general principles of presentation for views, the choice of views, partial views, auxiliary views, cuts and sections. The reading of orthographic drawings. PICTORIAL REPRESENTATIONS: axonometric representations (isometric drawings). INDICATION OF DIMENSIONS AND TOLERANCES: general principles; dimensioning of angles and slopes on prisms; dimensioning of conical tapers and taper angles; dimensioning of profiles; theory of nominal dimensioning and preferred numbers. GEOMETRICAL PRODUCT SPECIFICATION (GPS): The concept of GPS, the model for geometric specification; fundamental tolerancing principle; dimensional tolerances - ISO system of limits and fits. SURFACE DEVELOPMENT. Simplified representation of PIPELINES. Dismounting and remounting some real general purpose mechanical systems. Introduction to DIMENSIONAL METROLOGY.

Mandatory literature

Almacinha, J.; Simões Morais, J.; Texto de Apoio à Disciplina de Desenho Técnico (MIEM), AEFEUP, 2007
Morais, José Manuel de Simões; Desenho técnico básico. ISBN: 972-96525-2-X
Almacinha, J.; Fonseca, J.; Carvalho, F. X.; Desenho Técnico - Aulas práticas laboratoriais. Monografias relativas aos trabalhos práticos, AEFEUP, 2007

Complementary Bibliography

CHEVALIER, A.; Guide du Dessinateur Industriel , Paris: Hachette Technique, 2004
Silva, Arlindo 070; Desenho técnico moderno. ISBN: 972-757-337-1
International Organization for Standardization; Limits, fits and surface properties. ISBN: 92-67-10288-5
ISO Switzerland; ISO Standards Handbook - TECHNICAL DRAWINGS. Vols 1 e 2, 4ª ed, 2002
Earle, James H.; Engineering design graphics. ISBN: 0-13-030365-8
French, Thomas E.; Engineering drawing and graphic technology. ISBN: 0-07-113302-X
Morais, José Manuel de Simões; Desenho básico. ISBN: 972-9247-00-5

Teaching methods and learning activities

The theoretical-practical classes are based on detailed exposition of each topic of the course, illustrated by the presentation of examples of application and intercalated with the resolution, by the students, of exercises considered relevant and that can be found in the main bibliography of the discipline.

In the laboratory classes (only compulsory for 1st time enrolled students), each group of two students dismounts and remounts some mechanical systems for general use, to acquire a general perception about its working method and composition, examining, in addition, some constructive solutions found and getting in contact with different machine elements used in mechanical engineering.

Evaluation Type

Distributed evaluation without final exam

Assessment Components

Description	Type	Time (hours)	Weight (%)	End date
Subject Classes	Participação presencial	60,00
Problems solving	Teste	44,00		2008-02-08
	Total:	-	0,00

Amount of time allocated to each course unit

Description	Type	Time (hours)	End date
Study	Estudo autónomo	31	2008-02-08
	Total:	31,00

Calculation formula of final grade

Students enrolled for the 1st time:

Final classification = 90 % of the weighted mean of the marks of the three evaluation tests ("Orthographic representation and dimensioning” + “Isometric representation" + "Dimensional tolerances and surface development or pipelines") achieved in the theoretical-practical classes + 10 % of the average mark of the lab works assessment questionnaires.

Others enrolled students:

Final classification = weighted mean of the marks of the three evaluation tests ("Orthographic representation and dimensioning” + “Isometric representation" + "Dimensional tolerances and surface development or pipelines") achieved in the theoretical-practical classes.

Carrying out the three individual evaluation tests is a necessary condition for considering that exists a minimum number of elements that allows a correct assessment of each student.

The weights of the three individual evaluation tests achieved in the theoretical-practical classes are the following:
- Orthographic representation and dimensioning (0,4 weight).
- Isometric representation (0,35 weight).
- Dimensional tolerances and surface development or pipelines (0,25 weight).

When the final classification is greater or equal than 9,0/20, information (if it exists) about the remaining work developed in classes may increase this classification up to a maximum of 2,0/20.

The attainment of a final classification, in the discipline, greater than 18/20 must be confirmed by a complementary test.