Mechanical Engineering Drawing

Code:

EM0012

Acronym:

DCM

Keywords
Classification	Keyword
OFICIAL	Drawing

Instance: 2007/2008 - 2S

Active?	Yes
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	6	6	-
MIEM	296	Syllabus since 2006/2007	1	-	6	-
		Plano de estudos de transição para 2006/07	1	-	6	-

Teaching language

Portuguese

Objectives

BACKGROUND

In the present global market, there is an increasing demand for highly sophisticated functions of workpieces at a low cost and a tendency to use both sub-contracting and outsourcing. In such a market, the specifications for design and manufacturing in all technical fields are of major importance and several types of mechanical engineering drawings can be generated throughout the different stages of the product development process. Consequently, there is a need for global understanding, communication and application of the standardization in the fields of the geometrical product specifications and mechanical systems and components for general use.

SPECIFIC AIMS

Development of standardization concepts in Mechanical Engineering Drawing. Improvement of spatial visualization and technical communication skills. Introduction to design drawing. Introduction to the functional analysis of mechanical systems with the detail drawing of some components. Development of the ability to establish relationships between the design, product definition, manufacturing and verification phases. Technical skills acquired in this Unit are important for disciplines like Computer Aided Design and Manufacturing, Manufacturing Processes, Introduction to Machine Design and Final Mechanical Project in general.

PREVIOUS KNOWLEDGE

- Principles and rules for the execution of technical drawings (Technical Drawing Unit).
- Principles and rules for indication of dimensions and related tolerances (Technical Drawing Unit).
- Ability to read drawings of objects in orthographic representation and to make the correspondent pictorial representations (Technical Drawing Unit).
- Basic knowledge about Manufacturing Processes and Product Development techniques (Introduction to Manufacturing Processes and Product Development Unit).

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 should be able to:

1) Make assembly drawings in orthographic representation and item lists of mechanical systems, with the selection of standardized mechanical components.
2) Read assembly drawings in orthographic representation and make the corresponding exploded views.
3) Make detail drawings of mechanical systems components, through a functional analysis based on the corresponding assembly drawings.

Program

STANDARDIZATION in mechanical engineering drawing. MECHANICAL SYSTEMS AND COMPONENTS FOR GENERAL USE: screw threads, bolts, screws and nuts, washers, pins, circlips and retaining rings, rivets, welding, shafts, splines, keys and keyways, rolling bearings, seals for dynamic application, springs and gears. GEOMETRICAL PRODUCT SPECIFICATION: complements of dimensional tolerances (toleranced dimensions properties, functional dimensioning, manufacturing dimensioning, angular tolerances of prisms and conical tapers); geometrical tolerancing (tolerances of form, orientation, location and run-out; datums and datum-systems); general tolerances; indication of surface texture; specification and interpretation of geometrical tolerances (principle of independency, envelope requirement, maximum and least material requirements and reciprocity requirement); edges of undefined shape; drawing indications for moulded parts. DESIGN DRAWINGS: assembly drawings in orthographic representation and item lists, with the selection of standardized mechanical components. DETAIL DRAWINGS: geometric dimensioning and tolerancing (functional analysis, dimensional chain analysis, etc.). PRODUCTION DRAWINGS: manufacturing drawings (the need for tolerance transfer) and general assembly drawings (orthographic representation and exploded views of assemblies). Short reference to technical catalogue drawings. DIAGRAMMATIC DRAWINGS.

Mandatory literature

Almacinha, J.; Simões Morais, J.; Texto de Apoio à Disciplina de Desenho de Construção Mecânica (MIEM) , AEFEUP, 2008
Morais, José Manuel de Simões; Desenho técnico básico. ISBN: 972-96525-2-X

Complementary Bibliography

International Organization for Standardization; Limits, fits and surface properties. ISBN: 92-67-10288-5
Morais, José Manuel de Simões; Desenho básico. ISBN: 972-9247-00-5
Earle, James H.; Engineering design graphics. ISBN: 0-13-030365-8
ISO Standards Handbook - TECHNICAL DRAWINGS. Vols 1 e 2, Switzerland: ISO, 4ª ed. 2002
ISO; Fasteners and screws threads. ISBN: 92-67-10344-X (vol. 1)
French, Thomas E.; Engineering drawing and graphic technology. ISBN: 0-07-113302-X
Silva, Arlindo 070; Desenho técnico moderno. ISBN: 972-757-337-1
CHEVALIER, A.; Guide du Dessinateur Industriel, Paris: Hachette Technique, 2004

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.

Evaluation Type

Distributed evaluation without final exam

Assessment Components

Description	Type	Time (hours)	Weight (%)	End date
Subject Classes	Participação presencial	65,00
Problems solving	Teste	35,00		2008-05-30
Teste	Exame	5,00		2008-06-06
	Total:	-	0,00

Amount of time allocated to each course unit

Description	Type	Time (hours)	End date
Study	Estudo autónomo	57	2008-05-23
	Total:	57,00

Calculation formula of final grade

Final classification = ("assembly drawing + mechanical components" test mark + "detail drawing + tolerancings" test mark + average mark of four work assignments) / 3.

Carrying out the two 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 approval in the discipline depends on the average of the two tests marks be greater or equal than 7,0/20.

The average mark of the work assignments will be the result of the weighted mean of the marks of the following four works:
- Orthographic representation and nominal dimensioning (0,5 weight).
- Assembly drawing (1,5 weight).
- Exploded view (0,5 weight).
- Detail drawing (1,5 weight).

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