IN/0106 - MACHINE ELEMENTS
Academic Year 2022/2023
Free text for the University
ANTONIO BALDI (Tit.)
- Teaching style
- Lingua Insegnamento
|[70/78] MECHANICAL ENGINEERING||[78/00 - Ord. 2019] PERCORSO COMUNE||6||60|
The course is aimed at students of the 3rd academic year of Mechanical Engineering who have already attended and passed the courses "Disegno Tecnico Industriale", "Fondamenti di costruzioni di macchine" "Fondamenti di Progettazione", "Meccanica Applicate" and "Tecnologia Meccanica". In this sense, the course of Machine Elements has the ambition to act as a summary of the previous courses.
It addresses the design of some machine components: in particular, power screws bolted and welded unions, rolling bearings, gears and chain drives, springs.
Students will learn to deal with engineering problems by applying, as far as possible, the scientific knowledge acquired in previous courses but integrating them with specific data of the components in question.
Knowledge and understanding:
- Major structural problems related to the activity in pursuit of the most common mechanical components
- Identify the most dangerous working conditions
- Make a critical analysis of the structural solution
- Understand the plant- / technological- / structural-reasons which determined the achieved solutions
- Analyze technical documents on the topics of the course
- Express the result of calculations in the form of a technical report
The student will be able to perform a critical analysis of the possible solutions, clearly identifying advantages and limitations of various technological solutions, integrating them with the knowledge of the specific issues of the various machine components
The student will be able to fully illustrate by sketches, calculations, text the problems inherent in the various structural solutions.
The student must know the contents of the modules listed in the objectives, with particular reference to the course "Fondamenti di Costruzioni di Macchine" and the module "Fondamenti di Progettazione".
The correct understanding of the issues related to the identification of the stress and problems of fatigue are absolutely essential.
Faced with the study of the problems inherent in the operation of machine components in service, the student must also have an accurate picture of the scope in which they are to be inserted, so the knowledge about the courses of "Applied Mechanics" and "Manufacturing" are indispensable prerequisites for the proper schematization of loads and the identification of technological limits.
A good knowledge of the way in which these concepts are described, alongside the issues related to manufacturing tolerances (provided by the Industrial Design course) is also highly desirable.
Roll and silent chains
The course consists of lectures and exercises. As soon as enough knowledge are available, exercises focusing on the problems resulting from dimensioning and testing the analyzed components are proposed. Exercises are framed in the context of real problems trying to provide quantitative values of the involved parameters. From a temporal point of view, the distribution of Lessons/exercises is about 70 and 30% of the total of the course.
If still required, the didactic will be updated to face the current COVID-related emergency
Verification of learning
The examination consists of a written and an oral test. In the former, problems similar to those faced in the course will be proposed. The candidate will have to correctly identify loads and constraints of the system and perform an initial sizing of components.
The oral test focuses on the topics of the course; more in detail it focuses on the verification of the concepts and issues involved in sizing and monitoring of the mechanical components.
R.C. Juvinal, K.M.Marshek - "Fundamentals of Machine Components Design"
J.E. Shigley, C.R. Mischke, R.G. Budynas, "Progetto e costruzione di macchine". McGraw-Hill
P.H. Black, O.E. Adams, Jr., Machine design, McGraw-Hill
Text of some written tests and some didactic materials are available