Politecnico di Torino
Politecnico di Torino
Politecnico di Torino
Academic Year 2012/13
Engineering Drawing
1st degree and Bachelor-level of the Bologna process in Mechanical Engineering - Torino
1st degree and Bachelor-level of the Bologna process in Automotive Engineering - Torino
Teacher Status SSD Les Ex Lab Tut Years teaching
Moos Sandro ORARIO RICEVIMENTO A2 ING-IND/15 39 21 0 18 11
Tornincasa Stefano ORARIO RICEVIMENTO PO ING-IND/15 39 21 0 18 23
SSD CFU Activities Area context
ING-IND/15 6 C - Affini o integrative A11
Subject fundamentals
The basic language of all engineering activities is represented, in the majority of cases, by design processes that involve the engineer in two distinct activities: modeling and communication. In areas such as systems design and analysis, industrial plants and processes, which are typical fields of automotive engineering, the engineer uses technical drawings in order to identify construction solutions, carry out design calculations, and perform a technical-economic comparative analysis of the various solutions. In this sense, technical drawing is not merely a graphical exercise, but becomes a synthesis of the engineer's expertise about a product which must respect economic, manufacturing and functional specifications.
Today, the engineering drawing is a document to communicate, in a complete, precise, unambiguous and rigorous way, all information of an industrial component with the main objective of its manufacturing.
The course provie the theoretical notions related to the formalization of shape, dimensions, technological, dimensional and geometrical information that will permit the student to make the technical drawing of any mechanical part.
Expected learning outcomes
The students are expected to acquire the ability to represent and to dimension the most common industrial components, considering their functional and manufacturing requirements, as well as interpreting unambiguously and correctly drawings of parts and assemblies. The module therefore intends to provide undergraduate engineers the knowledge and methodologies necessary for components modeling and graphic description, in accordance to national and international Standards.
In more detail, the course deal with the drawing norms, the projection and section methods, the representation of dimensional and geometrical errors. The main mechical parts will be described, with the corresponding norms for representation and dimensioning.
Students need to acquire the abilities of interpreting univocally and correctly drawings of parts and assemblies, of representing and dimensioning common machine parts, and choosing autonomously:
- the required number of views for a complete representation of the part,
- the section techninque more fitting to the part morphology,
- the dimensioning method more suitable for describing the functional, techinological and checking requirements and to calculate taper and inclination parameters,
- the dimensional tolerances for fits, and their characterization,
- the dimensionale tolerances for functional dimension defined by tolerance stack-up analysis
- then geometrical tolerances and their datums,
- the application and drawing of mechanical connection parts.
The study cases proposed during the practice hours offer an application background oriented to common problems that can be found in the professional career.
Prerequisites / Assumed knowledge
Basic IT knowledge. Basic principles of orthographic representations.
Technical Standards, drawing conventions

Orthographic projections, solid intersections, sections. Axonometric projections.

Dimensioning, standards, functional dimensioning and tolerancing, surface roughness. Basic hole and basic shaft systems. Tolerance stack-up and geometric tolerancing.

Fastening and joining. Threaded fasteners, definition and standards. Standard pins, retaining rings. Threading systems: screws, bolts, studs and nuts. Introduction on bearings, belts and pulleys.
Delivery modes
Lessons are held in conventional rooms and provide the theoretical notions defined in the course contents. Practice, divided by two groups, are held in the drawing rooms and consists in the traditional representation of parts using orthographic or Axonometric projections. Parts can be presented stand-alone or are to be extracted from assemblies. Parts must be represented using the best views and sections, completed with dimensions, tolerances and roughness. The functional dimensioning is required. Clearance and interference of fits are to be calculated.
The parts are also modelled using a 3D parametric CAD system and many parts are to be assembled with the appropriate mating constraints to form an assembly. Through the software, the 2D drawings for parts and assemblies are produced.
Texts, readings, handouts and other learning resources
1) C. H. Simmons, D. E. Maguire, Manual of engineering drawing, ed. Elsevier
2) B. Griffith, Engineering drawing for manufacture, Kogan page science
3) C. Jensen, J. D. Helsel, Engineering drawing and design, Mc Graw-Hill
Assessment and grading criteria
A graphical test assesses the abilities for representing and dimensioning the common machine parts, autonomously choosing the views required for a complete representation of the part, the section technique more suitable to the part morphology, the more appropriate dimensioning sytem following the functional, technological or checking requirements, the geometrical tolerances and their datums, to apply and represent the mechnical connection parts using the proper technical standards. Contextually the ability of calculate dimensional fits, with geometrical tolerances, the taper and inclination and the tolerance stack-up analysis on simple assemblies.
The exam paper evaluation is based on the graphical quality, on the correctness of the graphical representation, of the dimensions, tolerances and on the ability of performing the required calculation. The theoretical competencies about graphical representation, with particular references to the technical standards is assessed with a set of question attached to the graphical test.
The duration of the graphical test does not exceed 3h and permits to achieve the maximum score of 30L/30.
The oral test is facultative by request of the students and with the professor's approval. It is possible to accede to it only if the score of the graphic test is equal or grater than 18/30. As a result, the score of the graphical test can be modified within a +/- 3/30 limit.
The practice drawings are mandatory and the papers must be delivered for evaluation. The final score can be varied of +/- 1/30 maximum.

Programma definitivo per l'A.A.2017/18

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