101101 - GRAPHIC EXPRESSION

Subject type: Basic

Coordinator: Joan Triadó Aymerich

Trimester: First term

Credits: 6

• Spanish

The purpose of Graphic Expression is to train students to be able to identify, interpret and use graphic representations in the fields of Engineering. Taking into account the industrial regulations of graphic representation techniques.

This course provides the essential basis for supporting graphic representation throughout the career.

Generally the contents of the subject of Graphic Expression can be grouped in:

1. Fundamentals and techniques of graphic representation
2. Spatial design
3. Industrial standardization
4. Representation and interpretation of industrial and architectural plans
5. Computer assisted applications

Specifically, the contents of the subject of Graphic Expression are the following:

Topic 1 - Dihedral System

• Dihedral System. definition
• What is a Projection
• Dihedral views
•  2D presentation of the Side view
• European System and American System
• Economy of Views
• Axonometric system

Topic 2 - Graphical expression and normalization

• Need for graphics in engineering
• normalization
• Types of drawings in engineering
• Technical vocabulary
• Standardization of plans

Topic 3 - Cuts and sections

• Purpose of cuts and sections
• Procedure to generate a cut
• Differences between cut and section
• Rules for representing cuts and sections
• Type of cut
• Cross sections
• Elements that cannot be sectioned longitudinally

Topic 4 - Dimension

• Functional, non-functional and auxiliary dimensions
• General principles of dimensioning
• Elements of a dimension
• Dimensioning of circular elements
• Provision of the quotas
• Simplified dimensioning of symmetrical parts
• Dimensioning of repeated features
• Dimensioning of conical, pyramidal and inclined surfaces
• Particular cases of limitation

Topic 5 - Dimensional tolerances

• Introduction
• Dimensional tolerances
  • Definition
  • Representation of tolerances
  • Quality tolerances
  • Position of the tolerance zone
• adjustments
  • Representation of adjustments
  • ISO adjustment systems
• General dimensional tolerances
• Verification of dimensional tolerances

Topic 6 - Geometric tolerances

• Introduction
• symbols
• Indications in the drawings
  • Theoretically exact dimensions
  • Tolerance rectangle
  • References and reference elements
  • Multiple references
  • Associated items
  • Application to partial lengths of elements
  • Individual zones with the same tolerance
  • Indication of "Common Area"
  • Projected tolerance zone
  • Partial references
• Examples of geometric tolerances
• General geometric tolerances

Topic 7 - surface states

• Introduction
• Symbols used in plans
• Indication of surface roughness
• Indications of the special characteristics of the State of the surface
• Indications in the drawings

Topic 8 - Threaded Unions

• Introduction
• Characteristics of a thread. Definitions
• Types of thread profiles
• Conventional representation and dimensions of the threads
• Snails
• Females
• bolts
• Asparagus
• Washers
• Pins
• Immobilization of screws and nuts
• Qualities of screw materials

Topic 9 - Detachable and Non-Detachable Unions

• PART 1: OTHER DETACHABLE JOINTS
  • Elastic rings
  • Chavetas
• PART 2: NON-REMOVEABLE JOINTS
  • rivets
  • Welding

Topic 10 - Transmission Elements 1 -  gears

• Types of gears
• Profile the tooth
• Gear elements
• Calculation of straight tooth gears
• Representation of cylindrical gears
• Helical gears
• Live without end crown
• Representation of crown worm gears

Topic 11 - Transmission Elements 2 -  Other transmission elements

• Belt transmission
• Transmission by chains
• Shafts and axles
• couplings
• Cardan joint

Topic 12 - bearings

• Definition of bearing
• Bearing type
• Simplified representation
• Bearing fixing systems
• lubrication abrasive and non-abrasive fillings

Topic 13 - Preferred Numbers

• Definition of preferred numbers
• Basic series and derivative series

The subject is taught throughout the 3 terms of the course (annual subject), but is divided into two modules. The 1st module covers the 1st trimester, and the 2nd module covers the 2nd and 3rd trimesters.

1st Module:

The teacher reserves the right to evaluate 2-3 practices out of the 5 to be completed during the first module. These practices (P1M) will have a value of 40% on the final grade and therefore the final exam (EF1M) 60%.

The Note of the 1st Module (N1M) is obtained:

N1M = 0,4 · P1M + 0,6 · EF1M

• Practices of the 1st module (P1M), carried out in the Practice Groups and during the class period of the 1st term.
• Final Exam of the 1st module (EF1M), carried out during the period of final exams of the 1st term.
• In order to pass the subject, a minimum grade of 4 (four) is required in the 1st module grade.

2nd Module:

The Note of the 2nd Module (N2M) is obtained:

N2M = 0,4 · AAGP + 0,2 · AAP + 0,4 · AAF

• Evaluable activities carried out in Practice Groups (AAGP) and during the class period of the 2nd and 3rd term.
• Partial assessable activity (AAP), carried out in the period of final exams of the 2nd term.
• Final assessable activity (AAF), carried out in the period of final exams of the 3rd term.
• The condition for delivering each evaluable activity is to have attended the corresponding session.
• In order to pass the subject, a minimum grade of 4 (four) is established in the average grade of the AAGP.
• In order to pass the subject, a minimum grade of 4 (four) is required in the AAF qualification.
• In order to pass the subject, a minimum grade of 4 (four) is required in the 2nd module qualification.

Final grade:

The Final Grade (NF) of the subject is obtained:

NF = 0,33 · N1M + 0,66 · N2M

Recoveries:

• The recovery of the modules (1st and 2nd) is carried out in the period of the recovery exams of the 3rd quarter.
• In the recovery period, only the EF1M (1st module) and the AAF (2nd module) are reassessed. The rest of the activities are not recoverable.
• The minimum marks established for all activities are maintained.
• The previous calculations will be applied to obtain the final grade of the subject.

Preciado Barrena, Cándido and Moral García, Francisco Jesús. 2006. Standardization of Technical Drawing. San Sebastián: Donostiarra. ISBN: 9788470633096.

Félez Mindán, Jesús and Martínez, María Luisa. 2008. Graphic Engineering and Design. Madrid: Synthesis; Collection: Synthesis engineering. ISBN: 8497564995.

Ruiz Vassallo, Francisco. 2005. Electrical and Electronic Schematics. Reading and Interpretation. Ed. Copyright creations. ISBN: 84-96300-02-1