OVERVIEW

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

AIMS AND CONTENT

LEARNING OUTCOMES

The module aims to convey the skills needed to create technical representations using orthogonal projections, in compliance with UNI/EN/ISO regulations. Provide the essential knowledge for computer-aided design of models and/or construction details of significant interest in the nautical sector.

AIMS AND LEARNING OUTCOMES

Nature of the course

Introductory to the general aspects and framework of the sector

Representation methodologies and orthogonal projections
Sections, dimensioning, micro/macrogeometric tolerances

In-depth study of some topics of particular interest for the nautical engineer

Removable connections and permanent connections
Construction drawing of the hull of typical ships

PREREQUISITES

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TEACHING METHODS

1. Classroom lectures: during these lessons the theoretical topics indicated in the course program will be addressed

2. Classroom exercises:

The exercises require the use of the CAD tool “MICROSTATION V8i”, presented during the same.
Each exercise consists of the execution in the classroom of a graphic exercise, assigned at the beginning of the exercise itself. During the following lesson the solution to the assigned exercise is presented in the classroom. The exercises carried out in the classroom are marked with the letter A, for a total of eight exercises (A1-A8).
The texts of all the assigned exercises can be downloaded directly from the course web page on the website www.aulaweb.unige.it

N.B. The exercises carried out in the classroom are essential integrations of the topics covered.

3. Home exercises:

During the course exercises are provided to be carried out independently at home (similar to the exercises carried out in the classroom) and to be handed in at the exam (preferably printed or, alternatively, in .dgn format on a USB stick). The examining commission reserves the right to check the execution and, if necessary, to reject the exercise if the execution is insufficient. The exercises carried out at home are marked with the letter D, for a total of eight exercises (D1-D8).
The texts of all the assigned exercises can be downloaded directly from the course web page on the website www.aulaweb.unige.it

SYLLABUS/CONTENT

1. Introductory part

- General: Purpose of technical drawing. Drawing tools. Unification. Formats and folding of sheets (UNI EN ISO 5457 and UNI 938). Scales of representation. Fundamental geometric constructions.

- Projections: Projection methods (UNI EN ISO 5456). Orthogonal projections. True form: rotations and overturnings. Plane sections of solids.

- Axonometric projections: Orthogonal axonometric projections: isometric, dimetric and trimetric; unified orthogonal axonometrics and applications.

2. Standards for technical drawing

- Technical product documentation (UNI EN ISO 3098)

- General principles of representation: Basic line conventions. Fundamental conventions and applications for recall lines and reference lines. Lines used in mechanical and industrial engineering drawings.

- Views and Sections (UNI ISO 128 and UNI 3972): Fundamental conventions for views. Fundamental conventions for cuts and sections. Views and sections in mechanical and industrial engineering drawings. General conventions for representing surfaces in sections and cuts. Hatching for representing materials in sections.

- Dimensioning and choice of references (UNI EN ISO 1119 and 3040, UNI ISO 129): General principles. Dimensions and their arrangement. Special conventions for representing them. Conical elements. Series of tapers and cone angles.

3. Drawing for technological realisation

- Notes on Mechanical and Materials Technology. Notes on mechanical machining by chip removal.

4. Tolerances and surface roughness

- Tolerances: Renard series and normal numbers; the ISO tolerance system, tolerances and deviations, groups of nominal dimensions, fundamental tolerances, fundamental deviations and position of tolerances; hole-base coupling systems and shaft-base; selection of tolerances; deviations for dimensions without indication of tolerance in machined parts with material removal; resulting dimensions; series of tolerated dimensions.

- Surface roughness: Definition, measurement of roughness, general rules for drawing; considerations on surface finishing: roughness and machining, roughness and tolerances; indication of roughness on technical drawings.

5. Removable connections and permanent connections

- Threaded connections: Unified threads; relief grooves for threads; threaded connecting elements (screws, studs, nuts, bolts); connections with through screw, biting screw, stud; devices against loosening; examples of applications.

- Permanent connections: Forced connections; riveting and riveting; welded connections; representation of welds and related graphic symbols; gluing; examples and applications.

6. Construction drawing of the hull of typical ships

- Technical drawing in Engineering Nautical: unified methods of representation of the elements that make up the hull structures, convention of lines and signs for the drawing of naval structures, application examples of significant interest.

7. Computer-aided design

- 2D CAD – MICROSTATION V8i: CAD workstation; generation of geometries; properties of the elements and their modifications; auxiliary functions; generation of drawings; dimensioning.

RECOMMENDED READING/BIBLIOGRAPHY

Material and bibliography provided on the TEAMS platform

LESSONS

LESSONS START

As per academic calendar.

Class schedule

The timetable for this course is available here: Portale EasyAcademy

EXAMS

EXAM DESCRIPTION

Written, Oral

ASSESSMENT METHODS

The exam will ascertain the acquisition of the fundamental concepts of technical drawing, the ability to transform sketches and drafts into reproducible and measurable digital drawings.

FURTHER INFORMATION

Students with disabilities or DSA can request compensatory/dispensatory measures for the exam.