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TECHNOLOGIES AND MANUFACTURING SYSTEMS Single discipline educational activity
Course Sheet Academic Year of enrolment:
Disciplinary Sector:
Production Technologies and Systems
Professor and Collaborators:
Hours of classroom activity:
Prerequisites:
Knowledge on fundamental aspects concerning the most common engineering materials, technical drawings and stress and strain states is required.
Objectives Contents The course enables students to acquire advanced knowledge on the processes required to transform the raw material into finished products with market value, through processes carried out on machines and systems. They will form the insights that will enrich knowledge and operational capabilities in the field of manufacturing processes, with a focus on the biomedical sector, so that the student acquires a clear awareness of the wider multidisciplinary context of engineering.
In order to address advanced design themes, even of considerable complexity, and treat the innovation and development of new products and new processes through the application of knowledge, the student will have able to determine method of carrying of the main manufacturing processes. This capacity will appear through a series of professionalising skills, such as the ability to appropriately choose the process able to produce the product with the design specifications and to evaluate the effect of the process parameters on the product costs and properties.
Extended Syllabus INTRODUCTION. Definition, product life cycle, main manufacturing processes, processes vs. materials, technological system, transformations and their accuracy. METAL CASTING. Fundamentals of casting and classification, mold, pattern, core, undercut, pouring of the molten metal, cooling effects, castability. Casting processes: sand casting, lost-wax casting, lost-foam casting. Permanent mold casting processes. High pressure die casting. METAL FORMING. Plastic flow behavior, rheological models, tension test, axysimmetric compression test, friction, strain energy method, classification of metal working processes. Forging. Sheet bending. Deep drawing. Sheet stamping. MATERIAL REMOVAL PROCESSES. Definitions, cutting and feed motions, cutting parameters, theory of chip formation in metal machining, actual chip formation, types of chip, build up edge, cutting forces, specific energy, thermal aspects in cutting, machinability, tool wear and tool life, Taylor tool life, cutting tool technology: Machining operations: turning, drilling, reaming, milling and grinding. WELDING PROCESSES. Autogenous welding. Heterogeneous welding. ADDITIVE MANUFACTURING. Operating principle, advantages, additive manufacturing techniques for metals, plastics and composite materials. MANUFACTURING PROCESSES FOR PLASTICS. Types of resins, injection molding and compression molding. MANUFACTURING PROCESSES FOR COMPOSITE MATERIAL. Polymer matrix composite materials, main forming technologies, vacuum bag molding.
Recommended Bibliography F. Gabrielli, R. Ippolito, F. Micari, Analisi e tecnologia delle lavorazioni meccaniche, McGraw-Hill, Milano, 2008.
Methods of Provision Teaching Methods Theoretical lectures: 120 hours
Evaluation methods Verification of learning:
The student has to demonstrate the ability to deal with the analysis of the main manufacturing processes by applying, autonomously, the metodologies and tools of manufacturing technologies. Aspects, such as the mastery of technical language and clarity of exposition, will also be assessed. Finally, the ability to properly use the acquired knowledge in solving simple problems must be proven.
The evaluation is based on an oral exam in which the student must answer four questions chosen among the topics of the course. There are also ongoing assessment tests (optional).
The student has to demonstrate the ability to deal with the analysis of the main manufacturing processes by applying, autonomously, the metodologies and tools of manufacturing technologies. Aspects, such as the mastery of technical language and clarity of exposition, will also be assessed. Finally, the ability to properly use the acquired knowledge in solving simple problems must be proven.
A thirty-points scale is used for grading, with possible praise.
The four questions asked in the oral test have the same weight in the assignation of the final grade. The minimum score, equal to eighteen points, will be achieved by the students who demonstrate sufficient capacity to answer to all the questions raised. The maximum grade, equal to thirty points with honors, will be given to students who have proven full mastery of the topics, exposed in full autonomy and with appropriate technical language. Students who have completed the ongoing assessment tests will be assigned a score equal to the average of the assessments obtained in the individual tests and the oral test will be optional.
