The course aims to provide the basic elements for the reading and drafting of a technical representation of the main mechanical devices with the specific understanding of the function that these elements have in the system to which they belong. D1 - Knowledge and understanding At the end of the course, the student has to know and understand the main types of technical drawings that are used in the industrial field, especially with reference to the utilization modality of the type of drawing. D2 – Applying knowledge and understanding At the end of the course the student will be able to carry out the representation of the main machine devices in accordance with the current technical standards and understanding their function. D3 - Making judgment On the basis of the acquired knowledge, the student will be able to draw a simple device by using the appropriate technical graphic representation. The students should be able to independently evaluate the use of the various forms of graphic language to transmit specific technical information; D4 - Communication skills The student has to be able to easely illustrate the main mechanical devices and their functions by using the correct terms in accordance with the rules of the technical representation. D5 – Lifelong learning skills The topics covered in the course are designed to teach to the student the rules for drawing and reading of technical drawings of mechanical parts and assembly strictly related to the mechanical engineering.

No prerequisites

The course deals with the standard representation of mechanical elements. UNI ISO norms related to mechanical topics are the normative reference. The course starts with an introduction concerning the standard representation techniques. Then, the rules to draw and read standard two-dimensional representations of common mechanical devices are illustrated. SYLLABUS General principles of mechanical drawing: Importance of Graphic Language needs for correct drawings; Rules and tools for mechanical drawing: Codes and ISO-UNI standard for mechanical drawing; Monge Method and orthographic projections: first angle, third angle and arrow projection methods; Views, cuts and sections: views selection, methods of obtaining orthographic views, cuts and sections; Dimensioning: general principles, codes, method of execution, arrangement of dimensions Fundamental principles of production technologies and their relationship with mechanical drawings Limits, tolerances and fit: fundamental tolerances and fundamental deviation, clearance fit, transition fit and interference fit. Basics of geometrical tolerances. Removable joints: representation of screw threads, screwed fasteners, bolted joint and shaft coupling (keys, cotters and pin joint) Fixed joints: riveting, welding and gluing representation, basics of technologies; Surface roughness: Actual profile, reference profile, datum profile, mean profile, peak to valley height, Mean Roughness Index, Indication of surface roughness Basics of geometrical measurements: Measurement tools Assembly drawings: bill of material, representation in assembly drawings of main standard mechanical components PRACTICE During the course, seven basic technical drawings are executed in according with UNI ISO rules. These drawings are characterized by an increasing difficulty and are drawn by hand and then with the aim of a software for bi-dimensional drawing software. During the course the tutorial drawing execution is explained. The last three tutorial drawings will be discussed and evaluated during the examination.

[1] Disegno Tecnico Industriale, Vol.I,II, Emilio Chirone, Stefano Tornincasa, Editore Il Capitello, Torino, Ultima edizione. [2] Disegno Tecnico Industriale, Sandro Barone, Alessandro Poli, Armando V. Razionale, Città Studi, Novara, 2020 [3] Vademecum per disegnatori e tecnici, Baldassini, Fiorineschi, Frillici, Piccioli, HOEPLI ed. [4] Machine Drawing, K.L.Narayana, P. Kannaiah, K. Venkata Reddy, New age international publishers. Additional resources are available on the “moodle” webpage of the course

SYLLABUS OF MACHINE DRAWING COURSE A.A. 2025/2026 General principles of mechanical drawing: Importance of Graphic Language needs for correct drawings; Rules and tools for mechanical drawing: Codes and ISO-UNI standard for mechanical drawing; Monge Method and orthographic projections: first angle, third angle and arrow projection methods; Views, cuts and sections: views selection, methods of obtaining orthographic views, cuts and sections; Dimensioning: general principles, codes, method of execution, arrangement of dimensions Fundamental principles of production technologies and their relationship with mechanical drawings Limits, tolerances and fit: fundamental tolerances and fundamental deviation, clearance fit, transition fit and interference fit. Basics of geometrical tolerances. Removable joints: representation of screw threads, screwed fasteners, bolted joint and shaft coupling (keys, cotters and pin joint) Fixed joints: riveting, welding and gluing representation, basics of technologies; Surface roughness: Actual profile, reference profile, datum profile, mean profile, peak to valley height, Mean Roughness Index, Indication of surface roughness Basics of geometrical measurements: Measurement tools Assembly drawings: bill of material, representation in assembly drawings of main standard mechanical components PRACTICE During the course eight basic technical drawings are executed in according with UNI ISO rules. These drawings are characterized by an increasing difficulty and are drawn by hand and then with the aim of a software for bi-dimensional drawing software.

Traditional classroom setting, drawings correction

Any changes to the methods described here will be communicated on the website of the Department, the Degree Program and the teaching.

The candidates will attend a practical and oral examination: The practical test will consist in development of detailed drawing of mechanical component using paper or 2d CAD software. In addition, t he development of two exercises about theoretical topics will be required. The oral exam will concern the discussion of the outcomes produced during the practical test, the verification of learning the theoretical topics, as well as the discussion of the exercises developed during the in-classroom tutorials.

This course explores topics closely related to one or more goals of the United Nations 2030 Agenda for Sustainable Development (SDGs)