Tecnologia Meccanica (M/Z)
MANUFACTURING PROCESSES Archimede Forcellese
Knowledge on fundamental aspects concerning the most common engineering materials, technical drawings and stress and strain states is required.
KNOWLEDGE AND UNDERSTANDING:
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 or systems. This knowledge, by integrating notions acquired in the courses of metallurgy, machine design and mechanical drawing, will form the insights that will enrich knowledge and operational capabilities in the field of manufacturing processes in mechanics, so that the student acquires a clear awareness of the wider multidisciplinary context of engineeringCAPACITY TO APPLY KNOWLEDGE AND UNDERSTANDING:
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.TRANSVERSAL SKILLS:
The resolution of individual and group exercises in lecture room will contribute to improve both the learning skills autonomously and the degree of independent judgment, both the communication skills that also stems from teamwork
INTRODUCTION. Definition, the product life cycle, the main manufacturing processes, relationship between processes and materials, technological system, accuracy of transformations.
METAL CASTING. Fundamentals of casting and classification, mold, pattern, core, undercut, pouring of the molten metal, cooling effects, castability. Expendable mold casting processes: sand casting and mold making, other expendable mold casting processes. Permanent mold casting processes: the basic permanent-mold process, low pressure casting, die casting (cold-chamber and hot-chamber die casting).
METAL FORMING. Fundamentals of plasticity, constitutive models, tension test, axysimmetric and plane strain compression tests, friction, strain energy method, workability, classification of metal working processes. Forging: definitions, forgiability, forging machines, factors affecting the die filling, flashing, open die forging, close die forging and other related processes, flash formation, preforming, forging forces. Sheet forming: anisotropy and formability of sheet metals. Shearing, blanking, and punching. Sheet bending: V bending, elastic springback, bending force, other bending processes. Deep drawing of axysimmetric parts: engineering analysis, choice of process parameters, calculation of the blank diameter. Deep drawing of non axsimmetric parts and 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, threedimensional cutting, machinability, tool wear and tool life, Taylor tool life, cutting tool technology: Machining operations: turning, drilling, reaming, milling and grinding.
WELDING PROCESSES. Fundamentals of welding. Welding processes: arc welding, protective gas arc welding. Resistance welding. LASER welding.
Development of the examination
LEARNING EVALUATION METHODS
The evaluation is based on an oral exam in which the student must answer four questions chosen among the topics of the course.
LEARNING EVALUATION CRITERIA
The student has to demonstrate the ability to deal with the analysis of the main manufacturing processes used in mechanical engineering 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.
LEARNING MEASUREMENT CRITERIA
The ability to independently deal with the topics of the course by applying the methods and tools of the manufacturing technologies, the clarity of exposition, the mastery of technical language are evaluated.
FINAL MARK ALLOCATION CRITERIA
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.
F.Gabrielli, R. Ippolito, F. Micari, Analisi e tecnologia delle lavorazioni meccaniche, McGraw-Hill, Milano, 2008. Slides of the lectures uploaded to the Moodle platform of the Polytechnic University of Marche.
- Ingegneria Meccanica (Corso di Laurea Triennale (DM 270/04))