Politecnico di Torino
Politecnico di Torino
Politecnico di Torino
Academic Year 2007/08
Engineering Drawing
1st degree and Bachelor-level of the Bologna process in Automotive Engineering - Torino
Teacher Status SSD Les Ex Lab Tut Years teaching
Tornincasa Stefano ORARIO RICEVIMENTO PO ING-IND/15 28 28 24 0 21
SSD CFU Activities Area context
ING-IND/15 5 B - Caratterizzanti Ingegneria meccanica
Objectives of the course
Basic engineering language is made up, in many cases, by drawing, that involves the engineer in two different ways: modelling and communication.
In planning and analzing systems, processes and industrial plants (typical in motor vehicle engineering) the engineer uses drawing to choose the best building solutions, to make calculuation of projects, with technical-economic compared analysis of different solutions; in this way drawing is not only a strictly graphical activity, but also the knowledge asset of the engineer.
This course aims to gie the students skills and methodologies to model and represent machines' elements and their sets, keeping count of national and international laws.
Expected skills
The student will be enabled to represent and dimension machines' parts, focusing on functional and production needs, and to understand particular and general drawings.
Basic knowledge of Euclidean, plane and solid geometry: properties of lines in triangles, regular polygons, solids, cones and cylinders are required.
Knowledge of technical drawing studied at the high school, graphical symbols, representation scales, drawing tools, polygons and solids representation are required.
Knowledge of descriptive geometry: ortographic projections, axonometric projections are required.
Introduction to technical drawing.

Drawing as a graphical language to communicate technical informations. Drawing within the cycle of life of a product.
Regulation and standardization of technical drawing.
Ortographic projections.

Projection of points, lines and plane figures. Projection of solids and their interpenetration. Sections and representation rules. Axonometric projections.

Dimensioning and representation of errors.

Functional and technological dimensioning. Disposition of dimensions and relative laws. Dimensioning systems.
Dimensional tolerances. Tolerance systems according to rule ISO. Tolerance chains. Geometric tolerance: rule ISO and tolerance ANSI.

Mechanical parts and connections.

Threaded parts: definitions. Threatening systems and connected representation and dimensioning rules. Screws, bolts, threated metal ring and anti-unscrewing systems. Keys and tangs. Bearings, belts, pulleys and cogwheels.


Professros are available to explain the students some topics of the program and of practicals, and to check, in an informal way, the learning of the students. Students are divided into two groups.
Laboratories and/or exercises
Components must be represented in proper sections, indicating dimensions, tolerances and roughness. Clearences and interferences must be taken into account, using tolerance chains. The functional dimensioning method is suggested. Labs consist of graphical representation (using a 3D drawing software) of single or global parts. Tridimensional models must be assembled properly. Through a software 2D models must be generated specifing particulars and materials.

Professors are available to explain the students some topics of the program and of practicals, and to check, in an informal way, the
learning of the students. Students are divided into two groups.

The exercises solutions and the progress test results are available on the course website: http://webd.polito.it/ E-mail:

Didactic material

E. Chirone, S. Tornincasa, Disegno Tecnico Industriale, vol. I e II, ed. Il Capitello, ed 2004-2006.

Exam Procedure

The final examination consists of a graphical test, a written test (optional) and an evaluation of the drawings carried out during the
course. Students can only take the oral test if they achieve a mark of at least 15/30 in the practical and written test. Students cannot
take the examination unless they have completed at least 80% of the tables set during the course.

Programma provvisorio per l'A.A.2005/06

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