OVERVIEW

The course aims at providing students with the basic knowledge, according to ISO standards, for the correct interpretation, understanding and execution of technical drawings via CAD software, with particular reference to the components used in the naval industry (description of geometry, tolerances, processes, materials, etc.). In addition, it shows the symbolic representations of the main structural elements, providing indications for the correct selection of components.

AIMS AND CONTENT

LEARNING OUTCOMES

TThe course introduces students to the solution of simple problems in design of machines and components for naval engineering by means of related techniques as well as tools for part and assembly drawing.

AIMS AND LEARNING OUTCOMES

By the end of the course, the students will know how to apply the basics of technical communication languages in mechanical industry to the solution of simple design problems.

Particularly, they will be able to:

1. interpret assembly and component drawings relevant to machines and their components respectively
2. understand details (for example tolerances, roughness, cartouche) contained in the above-cited drawings
3. apply the theoretical concepts to the solution of simple design or verification problems (for example the calculation of couplings)
4. make part drawings of simple mechanical components in orthographic representation and assembly drawings of simple groups of related parts according to standard, in both cases preferably by means of CAD tools
5. apply the relevant standards to achieve the previously mentioned results
6. demonstrate the ability to develop their own imagination and creativity, reflection, criticism, strategic thinking in the development of suitable design problems.

TEACHING METHODS

The course is mainly based on frontal teaching (roughly 60 hours). The activities are organized in lectures and tutorials.  

The theory classes held by the lecturer provide standard rules and basics of the design and drawing of machines.

By taking advantage of the concepts taught in the theoretical lectures, the core part of tutorials held in the informatics hall by the lecturer and the teaching assistant allows students to solve simple drawing and design problems, so that they can create assembly as well as component drawings after an introduction about the key features of the software Bentley Microstation. A class held by engineers from local firms (e.g., Fincantieri, Phase, etc.) who, suitably authorized, illustrate company drawings to consolidate the students' interpretative skills complements the cycle of drawing tutorials.

Theoretical lessons and practice sessions include a final self-assessment test and examples of design problem solutions, respectively. Attendance of all the lessons (both theory classes and tutorials) is advisable.

The core part of tutorials involves the solution of design problems proposed to the students and the creation of the related design drawings. Particularly, projects related to assemblies or subassemblies of machines will be performed by organizing work teams which, in addition to the course, will have to choose an assembly and produce the related design drawings by applying the methods described in the lessons. At the end of the course, the students will present their individual or group work, which will be considered in the assessment of the exam performance.

Students who have valid certification of physical or learning disabilities on file with the University and who wish to discuss possible accommodations or other circumstances regarding lectures, coursework and exams, should speak both with the professor of the course and with the Polytechnic School - Engineering's disability liaison (https://unige.it/commissioni/comitatoperlinclusionedeglistudenticondisabilita.html). Such communication should be carried out at the beginning of the course and in any case well in advance to agree on teaching and examination methods which, while respecting the teaching objectives, can consider individual learning methods.

SYLLABUS/CONTENT

Standardization of technical drawings. Classification of the drawings. General standards: formats and sizing, title block, lines, scale. Representation methods: classification of projections. Introduction to perspectives. Orthogonal and oblique projections. Orthographic projections. Use of orthographic projections: layout and choice of views. Sections: rules, types. Dimensioning: standards, systems, dimensions of geometric elements, functional and technological dimensioning. Dimensional errors: ISO system of tolerances, types and calculation of couplings, general tolerances, tolerance of chained dimensions. Microgeometric errors: definition, measurement, symbols and choice of the roughness. Macrogeometrical errors: geometric tolerancing in outline. Threads: elements of a thread, types, representation and dimensioning. Threaded connections elements: bolts (nuts and screws), studs, inserts, unscrewing devices. Removable non-threaded connections elements: keys, mention of plugs, safety rings and stops, splined coupling joints. Outline of permanent connections. Materials for mechanical engineering: designation and notes on mechanical properties, types of materials and heat treatments.

By spreading methods of communication of technical knowledge including design strategies aimed at reducing production costs, the course contributes to the achievement of goal 8 of 2030 United Nations’ SDGs, which encourages long-lasting, inclusive, and sustainable economic growth, full and productive employment, and decent work for all.

RECOMMENDED READING/BIBLIOGRAPHY

Recommended material

• A collection of the slides shown during the lessons is available.
• E. Chirone, S. Tornincasa, “Disegno tecnico industriale”, vol. 1 e 2, Ed. Il Capitello, Torino, 2006.

Additional consultation books

• Baldassini L., Handbook for designers and technicians, 20th edition, Hoepli, 2010
• UNI - Technical Drawing - General principles and application of mechanical and industrial design, Vol. I-II, 2011.
• UNI - Technical Drawing - Dimensional and geometric specifications for mechanical and industrial design, 2011.

The slides projected during the theory classes and tutorials, the texts of the proposed drawing problems, all the material necessary for their solution (Appendices, tables, extracts from the Standards, software, and support files) as well as examples of solutions are published on the Aulaweb page of the course.

Asynchronous or synchronous video lessons (recorded previously or during the classes, respectively) including an exhaustive explanation of the slides mentioned above are available to working students (or those with a reduced possibility of attending the classes).

TEACHERS AND EXAM BOARD

Exam Board

FABRIZIO STEFANI (President)

GIORGIO TANI (President Substitute)

DIEGO VILLA (President Substitute)

LESSONS

LESSONS START

https://corsi.unige.it/8722/p/studenti-orario

Class schedule

The timetable for this course is available here: Portale EasyAcademy

EXAMS

EXAM DESCRIPTION

The exam consists of a written and an oral part.

The written exam consists of a Multiple Choice Question theory test. The Multiple Choice Question theory test includes questions about 10 topics of the course. A maximum of 3 questions for each topic must be answered, for a total of roughly 20 questions.

Oral exam consists of a discussion about simple design and drawing exercises as well as specific questions of the test, inclusive of the relevant theoretical topics. The drawing exercise must be preferably carried out by means of a CAD software and completed with all the information (quote, tolerances, roughness, ...) needed to ensure compliance with the requirements prescribed in the text of the exercise.

Students with certified DSA, disabilities or other special educational needs are advised to contact the teacher at the beginning of the course to agree on examination methods that provide suitable compensatory tools.

ASSESSMENT METHODS

The written exam will evaluate the comprehension of all the main theoretical topics of the course, necessary to read and interpret drawings as well as to perform the overall design of mechanical components and related details, by means of the multiple-choice test. Each question of the test does not require the theoretical study of the theory, but its application for solving the proposed problem. In addition to further verifying the comprehension of the theoretical topics, the oral examination will evaluate the operational skills required for the completion of the exercise theme, i.e. the use of representation and detailing methods in an assembly or component drawing related to a simple mechanical part.

Assessment of students’ learning is based on:  the ability to apply drawing standards and rules; critical thinking skills applied to the exercises assigned during the course; the ability to expose the topics covered with appropriate technical terminology.

Exam schedule