6 credits during the 1st year of 8716 Electrical Engineering (L-9) GENOVA
6 credits during the 1st year of 10375 CHEMICAL AND PROCESSES ENGINEERING (L-9) GENOVA
|SCIENTIFIC DISCIPLINARY SECTOR||ING-IND/15|
|TEACHING LOCATION||GENOVA (Electrical Engineering)|
The course is about technical drawing assisted by a computer and related standards.
The course provides the basic knowledge, according to ISO standards, for the correct interpretation and understanding of technical drawings and for drafting, using a CAD software, mechanical components with geometry description and all further information (tolerances, processes, materials, etc.) necessary for their implementation (tolerances, processes, materials, etc.).
The purpose of the teaching is to introduce the student to the industrial drawing which is a universal visual language that conveys the way something works or how it is built. It will be explained that technical drawings may include two-dimensional (orthogonal) plans, sections and elevations or may include three-dimensional or exploded projections. They can be drawn to scale by hand or prepared using CAD (Computer Aided Design) software. To convey the precise meaning of the information, it will be clarified that technical drawings include dimensions, annotations and symbols which, to ensure their concise and unambiguous meaning, must be consistent with industry standards; furthermore, information on technical specifications included in technical drawings should never be duplicated as this can become contradictory and confusing.
Attendance to lectures, participation in computer classroom activities and individual study will allow the student to:
The course consists of lectures and exercises in the computer room.
The lessons introduce the UNI ISO standard for the representation of objects in an unambiguous manner and the indication of dimensions, dimensional, geometric and microgeometric tolerances. Furthermore, they present the terminology and basic rules for industrial technical drawing with the appropriate symbology to indicate threads, gear wheels, bearings, etc. The principle of maximum material and the need for envelope are also illustrated as exceptions to the principle of independence between dimensional and geometric tolerances.
The exercises are meant to explain the commands of a CAD software for the creation of A4 drawings in which a mechanical paty is represented according to the European orthogonal projections method. In order to facilitate the learning of the representation methods of 2D drawings on the computer, the students, who can work in pairs, are assigned themes that they develop independently. The idea is to exploit the techniques of learn by doing and learn by trial and error. The teacher guides and assists the students without interfering with their reasoning and about half an hour before the end of the exercise asks students who wish to show their work to the whole class so that errors are highlighted and corrected in real time.
Standardisation: international and national standards. Standard for technical drawing. Drawing types. Shape and size representation of a mechanical part: the graphic model. Hand-made sketches. Orthogonal projections, sections, dimensioning (complying the ISO standards). Overview on axonometric and slanted views. Summary on basic mechanical components.
Manufacturing tolerancing: dimensional, geometrical, surface tolerancing.
Non-permanent joining parts (threaded items, centering elements) and stable joining parts.
Guidelines on the elements shape depending on the manufacturing process and the material used.
Computer graphics. The digital mock-up. 2D modeling. Details on the SW for technical graphics. Rastering and vectoring of manual drafts.
A. Chirone, S. Tornincasa, “Disegno tecnico industriale”, vol. 1 e 2.
Additional documents are available on Aulaweb.
Office hours: The teacher is available for the students at the end of each lesson or via a MS Teams meeting.
ROBERTO RAZZOLI (President)
MARGHERITA MONTI (President Substitute)
All class schedules are posted on the EasyAcademy portal.
Students with specific learning disabilities, disabilities or other special educational needs are advised to contact the teacher at the beginning of the course to establish teaching and examination methods which, in compliance with the teaching objectives, can take into account individual learning methods and provide suitable compensatory tools.
The exam is divided into 2 tests:
A graphical computer test, which involves the execution of a constructive design using the 2D CAD MICROSTATION v8i. The graphic test takes place in the computer room (duration of the test: 2 hours) and the result of the test must be ≥ 18/30.
An oral test, which includes an assessment of the theoretical knowledge indicated in the course program.
N.B. The written test, if sufficient, is valid for the whole solar year. The oral exam can be taken in any official appeal.
Application for the graphic test
It is mandatory to book using the online mode (from the University portal services to students), AT LEAST 5 DAYS BEFORE the start of the test.
Given the limited capacity of the computer lab, one group is planned in the morning and a second one in the afternoon. These groups foresee a max. of 35 people.
If the total number exceeds 70, a further date will be set.
Within the assigned term, the drawing must be printed and the file copied to the Classroom - Delivery Unit folder.
It is possible to consult books and / or manuals.
The results will be announced on Aulaweb.
The oral examination if not passed (or rejected) does not cancel the written test. The positive results obtained in the graphic tests are valid for the whole exam session (calendar year).
The final grade is the average of the oral test and written test score.
Files containing the sheet squaring for A4 and A3 formats and the Microstation seed file settings are available on Aulaweb.
Upon delivery of the written test, the evaluation of any previous test is lost.
Registration for the oral test
After the publication of the results of the written test it is possible to register for the oral exam, using the web-based booking tool. Each student enrolled in the forum will receive an email alert, with the day and time of the oral test.
The examination procedures, its preparation and the degree of deepining of each topic will be illustrated during the lessons and reported on Aulaweb.
The written examination consists in the realization of a 2D table with dimensions and tolerances of a mechanical part of which a three-dimensional representation is provided. The student must be able to represent the proposed object unambiguously, maintaining its proportions, according to the European method of orthogonal projections; must provide the minimum number of views necessary to guarantee the workable realization of the piece; he or she will have to arrange the dimensions in sufficient and not redundant manner and to indicate the tolerances according to the required specifications in the examination text. He or she must be able to use the appropriate styles and line weights; must be able to designate a coupling in the hole-basis or shaft-basis system.
The oral examination will focus on the topics covered during the lectures and have the purpose of assessing not only if the student has reached an adequate level of knowledge, but also if he or she has acquired the ability to deal with logical problems that will be posed during the exam.
The student will be asked to illustrate theories and solve problems: in relation to these it will be evaluated the clarity of exposition, the appropriateness of the used terminology and the methodological approach oriented to manufacturability, interpreting and formulating prescriptions and principles related to the description of parts in a unique, unambiguous and not redundant way.