|SCIENTIFIC DISCIPLINARY SECTOR||ING-IND/15|
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 nautical 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.
The course aims to provide fundamental elements on the graphic representation using orthogonal projections , sections and units . Introducing the use of the computer to create models and drawings with special practical applications .
Basic introduction to general industrial aspects
Methods of representation and orthogonal projections
Sections, dimensioning, micro / macro geometric tolerances
In-depth study of some particularly interesting topics for the nautical engineer
bolt and welded connections
hull construction drawing of typical ships
1. Exercises within the classroom:
NB The exercises carried out in classroom represent an essential part of the overall course.
- General: purpose of technical drawings. Drawing tools. Standards. Formats and sheet folding (UNI EN ISO 5457 and UNI 938). Representation scales. Basic geometric constructions.
- Projections: Projection Methods (UNI EN ISO 5456). Orthogonal projections. True form: rotations and reversals. Planar sections of solids.
- Axonometric projections: isometric orthogonal projections: isometric, dimetric and trimetric; Unified applications and orthogonal axonometric projections.
2. Standards for technical drawing
- Technical product documentation (UNI EN ISO 3098)
- General principles of representation: basic conventions for lines. Fundamental conventions and applications for construction 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 surface representation in case of sections and cuts. Lines for the material representation in sectioned parts.
- Dimensioning and selection of reference (UNI EN ISO 1119 and 3040, UNI ISO 129): General principles. dimensioning and related rules. Special conventions. Conical elements. Series of taper and cone angles.
3. Technical Drawings and Manufacturing Technologies
- Elements of Material and Machining Technologies.
4. Tolerances and surface roughness
- Tolerances: normal numbers; the ISO system of tolerances, tolerances and deviations, fundamental tolerances, fundamental deviations; Hole-based and shaft-based coupling systems; selection of tolerances; deviations for dimensions without indication within machined parts; series of tolerated dimensions.
- Surface roughness: Definition, measurement of roughness, general design rules; considerations on the surface finish: roughness and machining, roughness and tolerances; indication of the roughness on technical drawings.
5. Connection between components
- Fasteners: Unified threads; threaded connections (screws, studs, nuts, bolts); connections through screws; devices against loosening; examples of applications.
- Permanent connections: nails and rivets; welded connections; representation of welds and graphic related symbols; examples and applications.
6. Hull construction drawing of typical ships
- The technical drawing in Nautical Engineering field: standard representation methods for the elements composing the hull structures, Convention for lines in the design of marine structures, application examples.
7. The computer aided drafting
- 2D CAD - MICROSTATION V8i:CAD workstation; generation of geometries; properties of elements and their modification; auxiliary functions; generation of the drawings; dimensioning.
Office hours: Teacher is available by e-mail appointment.
The exams is divided in 2 parts:
NB The written test, if sufficient, is valid for the entire calendar year. The related oral exam may be seated in any official exam date.
Access to the graphical test
Access to the oral test