Introduction to process planning
Manufacturing process selection
Machining operations and scheduling
Fixture
Tool selection
Cutting parameters selection
Vibrations in machining
CNC machining
NC Code for manual programming
M. Santochi, F. Giusti, Tecnologia meccanica e studi di fabbricazione, Ambrosiana
G. Halevi, R.D. Weill, Principles of Process Planning, Chapman & Hall, 1995
A. Fortunato, A. Ascari, E. Liverani, Tecnologia meccanica, introduzione alle macchine utensili, Esculapio
G. Campana, M. Mele, Sistemi integrati di lavorazione, Esculapio
Learning Objectives
General objective:
Providing to the students the competencies to realize a process plan and basic knowledge about NC machine programming.
With reference to the knowledge (CC) identified for the course, reference is made to the following descriptors:
- cc3: systematic knowledge and understanding of the key aspects of mechanical design of industrial engineering and its methods. In particular: understanding of which are the most suitable methods in order to define a product and its characteristics; knowledge of the technology of the materials that can be used, of the mechanical study of parts and assemblies, their dimensioning, their static and dynamic behaviour and interactions between components. The technologies for their production and their graphic representation are also areas of knowledge and understanding.
- cc6: knowledge and understanding of production facilities and processes. Understanding the advantages and limitations of process and plant design choices in different application contexts.
- cc7: knowledge and understanding of current issues regarding the organization and management of production factors and of the principles of company management and quantitative methodologies for the analysis of profitability of an economic activity, models for defining its organizational project, for strategic analysis and determination of the business plan.
- cc8: knowledge and understanding of the wider multidisciplinary context of engineering with a particular focus on problem solving, which starts from the problem to identify causes and possible measures (typically multidisciplinary) to tackle them.
- cc12: knowledge and understanding of the most suitable production process for the realization of mechanical components, and definition of process parameters able to meet the requirements of product feasibility.
With reference to the competences acquired (CA) identified for the Course reference is made to the following descriptors:
- ca3: applying knowledge and understanding related to the most appropriate methods of analysis, modelling, verification and experimentation to design, analyze and test machines and plants. This includes: the interpretation and drafting of mechanical parts and machines (also using dedicated CAD systems); the sizing and the functional and structural verification of components and mechanical groups subjected to static and fatigue stress; the functional setting of the design of a mechanical system, applying the principles of kinematics and static principles; analysis of the characteristics of metallic and polymeric materials for the production; the choice of the best production process aimed at the creation of mechanical components; analysis and design of production systems including the study of reliability, safety and economic and environmental sustainability
- ca7: applying knowledge and understanding problems related to the choice and subsequent use of appropriate tools and methods - such as software tools for three-dimensional modeling, simulation (structural and fluid dynamics) and management of technical information – for the design and production of components and machines.
- ca 10: Applying knowledge and understanding problems related to the choice of the most suitable production process for the production of mechanical components, and to define the process parameters able to satisfy the product feasibility requirements.
Prerequisites
Mechanical Technology
Mechanical Design
Teaching Methods
50 hours of In-class lesson
4 hours of laboratory
Further information
The exams sessions are available using the CSIAF booking system.
On the e-learning platform of the current year further information for booking procedure are reported.
Type of Assessment
The level of knowledge acquired by the student will be evaluated by an oral exam provided by both teachers on process planning and manufacturing process, including the technical and technological tools for its implementation.
The access to the oral exam is subject to achieve a sufficient grade on the developed process planning for a mechanical component.
The student must prove the competences acquired on manufacturing process selection and process parameters definition to obtain a sufficient grade. Complementary competences are related to multidisciplinary approach to design and manufacturing process.
With reference to the knowledge (cc) and competences acquired (ca) identified for the course, oral examination aims at highlighting the acquired knowledge cc3, cc6, cc7, cc8 and cc12, and verifying the competences ca3, ca7 and ca10.
Course program
Introduction to process planning
- Semi automatic development of a process plan
Manufacturing process selection
- Manufacturing processes
- Technological and economical aspects for the process selection
Machining operations and scheduling
- Anteriorities and sequencing the operations
Fixture
- Fixturing theory
- Fixture example for turning and milling
- Tooling systems
Tool selection
- Milling, turning and drilling tools: main characteristics
- Tool selection procedures
Cutting parameters selection
- Cutting parameters
- Cutting parameters selection on the basis of the different aspects of the machining process
Vibrations in machining
- Different vibrations in machining
- Stability lobe diagram: theory and simplified prediction
CNC machining
- Main machine tool structure
- CNC machine
NC Code for manual programming
- NC machine programming
- G and M codes
- Trajectory and tool compensation