AIMS AND CONTENT

LEARNING OUTCOMES

The course provides the students with the basic knowledge of welding and bonding technologies. The structure of a join is described and the causes of the typical defects are studied. The bonded joints realisation phases are described.

AIMS AND LEARNING OUTCOMES

The aim of this course is to provide students with basic knowledge of the special welding process, to describe in detail the defects that can be found, to analyze the main welding technologies (traditional and innovative) of metallic materials. Visits to laboratories and production facilities materialize the theoretical aspects described in class, showing students some of the working realities in which they will be able to operate after graduation.
At the end of the course the students will know the basic concepts on welding and will be able to recognize the metallurgical and operational defects found. They will have the tools to establish the geometric parameters of a joint by selecting the most suitable cutting technique. Thanks to an in-depth analysis of the main welding techniques, students will have the means to select between conventional welding technologies such as the coated electrode, the submerged arc, MIG MAG and TIG welding and the most innovative ones such as plasma , the laser beam and the FSW, the one that is most suitable for the selected material and application type.

TEACHING METHODS

The teaching consists of lectures, during which the teacher uses video to understand the various aspects of welding and the machines principles of operation during the joint realization.

Visits to industrial plants and laboratories are also carried out, during which it is possible to watch the various stages of production and verification of the quality of the welded parts.

SYLLABUS/CONTENT

During the course the following topics will be discussed:

1. The welding concept

• Basic welding concepts;
• Structure of a welded joint, identification of the fused zone and the heat affected zone;
• Thermal cycles due to welding;
• Stress and strain.

2. Defects in welding

• Introduction of the main defects found in a welded joint;
• Metallurgical defects;
• Operational defects;
• Applicable normative references, definitions and acceptability criteria.

3. Preparation of the edges

• Types of preparations;
• Preparation of the edges with thermal source.

4. Welding methods

• Introduction and historical notes;
• Oxyacetylene welding;
• Operating principles of the electric arc;
• Generators for electric arc welding;
• Welding with coated electrodes;
• Submerged arc welding;
• MIG / MAG welding;
• TIG welding;
• Resistance welding;
• Innovative welding (plasma, electron beam, laser, friction stir welding).

RECOMMENDED READING/BIBLIOGRAPHY

E. Lertora, C. Gambaro, “Tecnologie di giunzione”, Dipartimento di Ingegneria della Produzione, Termoenergetica e Modelli Matematici, Università di Genova, 2010.

TEACHERS AND EXAM BOARD

Exam Board

ENRICO LERTORA (President)

CARLA GAMBARO

CHIARA MANDOLFINO

ALESSANDRO BRUZZONE (President Substitute)

LESSONS

Class schedule

JOINT TECHNOLOGY

EXAMS

EXAM DESCRIPTION

The exam includes an oral exam during which three questions will be asked.
The first question will focus on the basic concepts of welding, the electric arc, defects and cutting and preparation of the edges.
The second question will concern a traditional welding technology.
The third question will concern an innovative welding technology.

ASSESSMENT METHODS

Details on how to prepare for the exam and the degree of depth of each topic will be given during the lessons.
The oral examination involves the discussion of three topics covered during the lectures and will have the purpose of assessing whether the student has reached a level of knowledge of the appropriate concepts, will also evaluate the ability to choose a welding process according to the type of application required.

Exam schedule