Mechanical Engineering Drawing

Code:

EM0012

Acronym:

DCM

Keywords
Classification	Keyword
OFICIAL	Drawing

Instance: 2012/2013 - 2S

Active?	Yes
Responsible unit:	Industrial Drawing 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
MIEM	254	Syllabus since 2006/2007	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 course units like Computer Aided Design and Manufacturing, Manufacturing Processes, Introduction to Machine Design and Final Mechanical Project in general.

PERCENTUAL DISTRIBUTION:

Estimated percentual distribution for the scientific and technological contents:

- Scientific component: 40 %.

- Technological component: 60 %.

Learning outcomes and competences

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.

Working method

Presencial

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

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 Unidade curricular de Desenho de Construção Mecânica (MIEM), AEFEUP, 2013
Morais, José Manuel de Simões; Desenho técnico básico. ISBN: 972-96525-2-X

Complementary Bibliography

ISO Standards Handbook - Technical product specification, ISO, 2009. ISBN: ISBN: 978-92-67-10510-9
ISO; Fasteners and screws threads. ISBN: 92-67-10344-X (vol. 1)
ISO Standards Handbook - TECHNICAL DRAWINGS. Vols 1 e 2, Switzerland: ISO, 4ª ed. 2002
International Organization for Standardization; Limits, fits and surface properties. ISBN: 92-67-10288-5
CHEVALIER, A.; Guide du Dessinateur Industriel, Paris: Hachette Technique, 2004
Silva, Arlindo 070; Desenho técnico moderno. ISBN: 972-757-337-1
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 recitation classes are based on detailed expositions of each topic of the course, illustrated by the presentation of application examples and intercalated with the resolution, by the students, of exercises considered relevant and that can be found in the main bibliography of the course unit.

keywords

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

Evaluation Type

Distributed evaluation without final exam

Assessment Components

Description	Type	Time (hours)	Weight (%)	End date
Attendance (estimated)	Participação presencial	67,50	90,00
Tests	Exame	7,50	10,00	2013-07-08
	Total:	-	100,00

Amount of time allocated to each course unit

Description	Type	Time (hours)	End date
Study	Estudo autónomo	52	2013-06-05
Problems solving	Estudo autónomo	35	2013-06-05
	Total:	87,00

Eligibility for exams

Students have to attend to 75 % of the classes, according to Article 7 of the Specific Rules for FEUP's Students Assessment.

Calculation formula of final grade

Final grade = (A + B + C) / 3.

where:

A - is the "assembly drawing + mechanical components" test mark;

B - is the "detail drawing + tolerancings" test mark;

C - is the average mark of four work assignments.

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 course unit 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 grade, in the course unit, greater than 18/20 must be confirmed by a complementary test.

Special assessment (TE, DA, ...)

According to items 9.1 b) and c), 9.2 to 9.4 in Article 9 of the Specific Rules for FEUP's Students Assessment. Students will have to take a complementary practical exam (the teacher will specify it, before the day of the exam), where they have to show their knowledge, that couldn’t be assessed during the semester.

Classification improvement

According to Article 10 of the Specific Rules for FEUP's Students Assessment.