The course aims to introduce students to product design.
The course aims to introduce students to product design, with particular reference to the design process and to design for safety, for manufacturability, for cost, for assembly and for environment.
The course aims to set out the rules for the design, calculation and representation -according to ISO standards- of typical machine elements (axles and shafts, brakes and joints, chains and belts, bearings, springs, threaded connections, welds, gears). The entire design process is faced according to the Design-for-X and Eco-Sustainable life-cycle guidelines.
The student will be able to schematize simple machine parts, carry out their static and fatigue strenght, choose the most suitable material and suggest the optimal shape according to the DFA and DFM rules, outline the assembly and disassembly methods.
Classroom lessons.
Design of mechanical elements
Connections that cannot be dismantled: Welds. Riveted joints. Glued on joints. Forced connections.
Connections that can be dismantled: Threads. Power screws. Threaded connections. Set screws (outlines).
Mechanical springs.
Elements for transmission of power and lifting: Gears. Flexible elements: Belts; Wire ropes; Chains.
Members for storage or transfer of energy associated to rotating motion.
Brakes. Clutches. Flywheels.
Bearings: Rolling contact bearings. Journal bearings.
Crankshafts.
Elements of product design
New approach European Directives (outline).
Standards for the safety of machinery: Machinery Directive and Italian D. Lgs. 81/2008.
Total Design. Product design specification.
Cooperative and Eco-compliant Design.
Design for “X” (specifically: Design for manufacturing and for assembly/disassembly).
Reference book:
De Paulis A., Manfredi E., Costruzione di macchine: Criteri di base e applicazioni principali, Pearson Italia - Milano, 2012
Additional suggested books:
Shigley J.E., Progetto e costruzione di macchine, 2a ed., McGraw-Hill, 2009
Chirone, E., Tornincasa, S., Disegno tecnico industriale, Ed. Il Capitello - Torino, 2011
Medri G., Cenni di progettazione di prodotto, Liguori Editore, 2008
Ricevimento: The teacher is available for the students at the end of each lesson or via a Teams' meeting.
MARGHERITA MONTI (President)
GIOVANNI BERSELLI
FRANCESCO CRENNA
ROBERTO RAZZOLI (President Substitute)
Written and oral examination. The written test regards the solution of one exercise. The oral examination consists of two questions on theorical aspects. A positive evaluation of the written test is a necessary condition to access the oral examination.
It will be evaluated the candidate's ability to translate a real mechanism into a simplified representation for the calculation of the stresses and strain given by service loads. In addition, is required that the students can illustrate the architecture of the mechanism by means of hand made drafts, according to ISO rules, both for the assembly steps and the maintenance tasks.
