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Politecnico di Torino
Anno Accademico 2012/13
01NLEJM
Manufacturing processes
Corso di Laurea in Ingegneria Meccanica (Mechanical Engineering) - Torino
Docente Qualifica Settore Lez Es Lab Tut Anni incarico
De Maddis Manuela ORARIO RICEVIMENTO RC ING-IND/16 60 20 0 0 9
SSD CFU Attivita' formative Ambiti disciplinari
ING-IND/16 8 B - Caratterizzanti Ingegneria meccanica
Presentazione
The course is aimed at developing the knowledge of production methods typical of mechanical industry. Description is than given of plastic deformation processes of metals, of foundry techniques and of material removal processes, analyzing the relationships among them and the product requirements (i. e. performances and costs).
Risultati di apprendimento attesi
The knowledge of production processes utilized by the mechanical industry is necessary as the student must be capable of :
- choosing process technologies,
- choosing and, if required, collaborating in the design of production means;
- preparing the manufacturing cycle of the part, both in metal or polymeric materials.
At the end of the course the student must:
- know and apply the relationships between materials and processes;
- know and apply manufacturing techniques;
- know and apply basic performances of production means (machines, tools/moulds/dies, fixtures and measurement/testing instruments);
- know and apply process variables and their interactions with part requirements (quality, tolerances, surface roughness etc.)
- know and apply the right actions in order to minimize the part cost;
- know and apply the regulations concerning the industrial safety.
As to judgement independence and communication cleverness, the student must:
- write technical reports, also in English, with a high level of professionalism
- evaluate production problems and find quickly their solutions as he knows the interactions among the various players in the production process and he has a sufficient experience in the evaluation of the magnitude order of involved variables;
- get easily into touch with people, using English too.
Prerequisiti / Conoscenze pregresse
Ability in technical drawing, as every production process starts from the detailed drawing of the component; extensive knowledge of materials, especially metal. The mastery of English, spoken and written is essential.




Programma (Prof. M. De Maddis)

The course is aimed at developing the basic knowledge on manufacturing processes.
Through lectures, demonstrations, and practical applications, the students will be introduced to the different types of manufacturing processes with the aim of making them able to select the most economic process which best meets the design requirements.

The principal topics are:

Mechanical fundamentals:
ˑ Elastic and plastic behavior
ˑ Stress and strain
ˑ Stress and strain relationship for elastic behavior
ˑ Element of the theory of plasticity
Application to material testing
ˑ Tensile test. Bridgman correction. Effect of temperature and strain rate.
ˑ Compression test. W&F theory.
ˑ Hardness test
Fundamental of metalworking
Bulk deformation Process
ˑ Forging: open die forging process.
ˑ Forging: closed die forging.
ˑ Closed die design
ˑ Extrusions.
Material removal processes
ˑ Orthogonal cutting.
ˑ Chip types and chip removal mechanism.
ˑ Velocity relationship.
ˑ Cutting forces. Ernst & Merchant theory.
ˑ Cutting pressure. Cutting power.
ˑ Temperatures in cutting.
ˑ Oblique cutting.
Machining operations and machine tolls
ˑ Turning. Engine lathe, CNC lathes, fixtures, tools geometry, characteristic angles, forces, powers. Surface roughness
ˑ Milling: peripheral milling. Chip thickness. Cutting force. MRR. Helical milling cutter. Surface finish in milling. Working time.
ˑ Milling: face milling. Chip thickness. Cutting force, Working time.
ˑ Drilling: drill press e work holding. Cutting force and power. Drilling time Cutting tool technology
ˑ Toll wear. Toll life . Taylor and Kronenberg equations.
Economic and product design
ˑ Optimization of cutting condition. Cutting speed for maximum production and minimum cost.
Solidification processes
ˑ Fundamental of metal casting.
ˑ Sand Casting: from the draw to the pattern. Feeding system, gating system design, metallostatic force.
ˑ Casting manufacturing processes: discussion of several expandable and permanent mold processes.
ˑ Casting quality.
Manufacturing system
ˑ Computer Numerical Control. Programming (G-code, APT).
ˑ Program structure. CNC milling.








Prerequisites
Ability in technical drawing, as every production process starts from the detailed drawing of the component; extensive knowledge of materials, especially metal. The mastery of English, spoken and written is essential.


Testi richiesti o raccomandati: letture, dispense, altro materiale didattico (Prof. M. De Maddis)
Manufacturin Engineering and Technology
Kalpakjian_Schmid
Pearson

Fundamentals od Modern Manufacturing
Mikell P. Groover
John Wiley & sons, inc.

Mechanical Metallurgy
George E. Dieter
Mc Graw - Hill Book Company

Slides and exercices available on the Didactic Portal at the end of each lesson.


Criteri, regole e procedure per l'esame (Prof. M. De Maddis)
Compulsory written examination
The written exam will concern all course programme and will be made up of theoretical questions and practical exercises.


Orario delle lezioni
Statistiche superamento esami

Programma definitivo per l'A.A.2012/13
Indietro



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