Lectures and laboratory exercises will allow the student to: • know and understand the theoretical foundations, the basic application techniques and the graphic and normative language of industrial technical design; the geometric elements and conventions of representation; projective and sectioning techniques for graphic technical representation; the principles and techniques of dimensioning and attribution of dimensional tolerances; the basic elements and technological principles necessary for the correct interpretation of manufacturing drawings in the industrial field. • know and understand the functional and construction characteristics of the main mechanical components, the regulations of the main mechanical components, the main threaded parts and fixed connections and the main connecting shaft-hub, removable and fixed. • ability to interpret technical drawings of machines, systems and subgroups; ability to prepare and analyze technical drawings of simple subgroups of machines and components. Being able to choose and size the main threaded parts and fixed connections. Being able to choose and size the main shaft-hub connecting parts. • knowledge of the modeling procedures of a CAD (Computer-Aided Design) system and of the main modeling features and production capabilities of a technical drawing

Basic principles of orthographic representations.

Course consists in 21 hours of theoretical lections and 39 hours of laboratory activities. The laboratory activities consist in the graphic representation by hand and by 3D parametric CAD system of single components or parts extracted from assemblies. Understanding the principles of 2D and 3D drawing includes the fundamental concepts of projection theory, hidden views and sections, which involve spatial abilities such as mental rotation and spatial visualization. The combined use of hand drawing and CAD during laboratory activities therefore has a double advantage. The use of CAD and expertise in digital design systems is essential. However, the physical nature of the experience of drawing by hand and training through descriptive geometry develops a deeper ability in the mental capacity of manipulating three-dimensional space. The parts are provided by the teacher and must be represented by hand and by CAD using the best views and sections, completed with dimensions, tolerances and roughness. The functional dimensioning is recommended. Clearance and interference of fits are to be calculated. In the 3D CAD, the parts must be modelled and assembled with the appropriate mating constraints. Then, through the software, the 2D drawings for parts and assemblies must be defined. The laboratory activities also include the development of a virtual prototyping project, on a theme chosen by the student and agreed with the teacher. The project is carried out by groups of two to four students using the techniques and systems learned during the course itself. This activity based on brainstorming (a comparison of ideas that are freely proposed within a group) and on problem solving (the research for the best solution to solve a problem) allows for reasoning by objectives, finding creative, flexible and customized solutions and to acquire greater empowerment, student cooperation and the ability to learn by themselves from concrete experience.

Course consists in 21 hours of theoretical lections and 39 hours of laboratory activities. The laboratory activities consist in the graphic representation by hand and by 3D parametric CAD system of single components or parts extracted from assemblies. Understanding the principles of 2D and 3D drawing includes the fundamental concepts of projection theory, hidden views and sections, which involve spatial abilities such as mental rotation and spatial visualization. The combined use of hand drawing and CAD during laboratory activities therefore has a double advantage. The use of CAD and expertise in digital design systems is essential. However, the physical nature of the experience of drawing by hand and training through descriptive geometry develops a deeper ability in the mental capacity of manipulating three-dimensional space. The parts are provided by the teacher and must be represented by hand and by CAD using the best views and sections, completed with dimensions, tolerances and roughness. The functional dimensioning is recommended. Clearance and interference of fits are to be calculated. In the 3D CAD, the parts must be modelled and assembled with the appropriate mating constraints. Then, through the software, the 2D drawings for parts and assemblies must be defined. The laboratory activities also include the development of a virtual prototyping project, on a theme chosen by the student and agreed with the teacher. The project is carried out by groups of two to four students using the techniques and systems learned during the course itself. This activity based on brainstorming (a comparison of ideas that are freely proposed within a group) and on problem solving (the research for the best solution to solve a problem) allows for reasoning by objectives, finding creative, flexible and customized solutions and to acquire greater empowerment, student cooperation and the ability to learn by themselves from concrete experience.

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 4) Material provided by the teacher through the web site

Lecture slides; Exercises; Exercise with solutions ; Lab exercises; Lab exercises with solutions;

Exam: Computer lab-based test;

L’esame è volto ad accertare la conoscenza degli argomenti elencati nel programma ufficiale dell'insegnamento e la capacità di applicare la teoria ed i relativi metodi di calcolo, sia alla rappresentazione grafica, sia alla soluzione di esercizi. Le valutazioni sono espresse in trentesimi e l’esame è superato se la votazione riportata è di almeno 18/30. L'esame consiste in una prova scritta, durante la quale lo studente dovrà inizialmente rappresentare graficamente, su foglio da disegno formato A3, alcuni particolari estrapolati da un disegno di assieme, completi di quotatura con indicazione delle tolleranze e delle rugosità; successivamente completeranno l'esame, una serie di domande di natura teorica, a risposta e chiusa, che comprenderanno lo svolgimento di esercizi di calcolo, sugli argomenti contenuti nel programma dell'insegnamento ed avranno lo scopo di verificare il livello di conoscenza e di comprensione degli argomenti trattati. L’esame scritto si pone l’obiettivo di verificare le competenze di cui sopra (cfr Risultati dell’apprendimento attesi). La durata della prova scritta è di 2,5 ore. I punteggi relativi alla parte grafica ed alle domande teoriche, vengono forniti all'interno della traccia d'esame. Durante lo svolgimento dell'esame non è consentito tenere e consultare quaderni, libri, fogli con esercizi, formulari. I risultati dell’esame vengono comunicati sul portale della didattica, insieme alla data in cui gli studenti possono visionare il compito e chiedere chiarimenti.

In addition to the message sent by the online system, students with disabilities or Specific Learning Disorders (SLD) are invited to directly inform the professor in charge of the course about the special arrangements for the exam that have been agreed with the Special Needs Unit. The professor has to be informed at least one week before the beginning of the examination session in order to provide students with the most suitable arrangements for each specific type of exam.