Lecturer: Daniele Stefano Bonomi  

Course name: Disegno di macchine con laboratorio di progettazione
Course code: 500740
Degree course: Ingegneria Industriale
Disciplinary field of science: ING-IND/15
University credits: CFU 9
Course website: n.d.

Specific course objectives

Course programme

Geometrical constructions

• Design instrument (description and use);
• Drawing lines (large, thin, mixed lines, dotted lines, control of thickness, types of pencils, types of refils )
• Geometrical constructions (fundamental constructions, construction of polygons, circumferences, archs and connections, notable curves, semplifyed constructions ( ellipse, oval, evolvent, etc) technical curves (evolvent of circle, cylindrical helic, Archimedean drill ))

Orthogonal projections

• Orthogonal projections ( plane projections, orthogonal projections of simple geometrical figures, projections of simple solids);
• Axonometric constructions (illustrative drawing )
• Sectional views (sections of simple solids; intersections of solids)
• Sectional views in the industrial technical drawing

Norms

• International system of measurement
• Rules and standard specifications
• Meaning of different types of lines in drawing
• Squaring off a drawing sheet
• Sizes of the sheets
• technical drawing heading

Drawing and mechanical working

• Specification of materials and their characteristics
• Moulding process from the liquid state, elements of foundry and diecasting
• Manufactures for plastic deformation-rolling, extrusion, drawing, forging, sheet working
• Manufactures for the removal of metal chips (machine tools, milling, lathe machining, drilling, reaming, slotting, broaching, grinding, lapping )
• Non conventional manufactures ( spark . erosion, laser cutting, water cutting )

Dimensioning

• Description of the elements of dimensioning
• Criteria of the indications of dimensions
• Particolar conventions of dimentioning ( radius, diameter, spheres etc. etc. )
• Systems of dimensionig ( series, parallel etc. etc. )
• Dimensioning according to the aim of the drawing, dimensioning according to the machining
• Classification of dimensioning

Errors and tolerances

• Errors in the built pieces
• Dimensional tolerances (control between two limits , ISO system of tolerances and connections, general tolerances, series and chains of tolerated measures )
• Errors in the drawings

Surface finishes and roughness

• Types and degrees of surface finishes
• Relationship between roughness and tolerances

Threads

• Threads
• Drawing the threads
• Thread tolerances

Threaded fastenings

• Screws and bolts, threaded inserts, nuts, washers, bolt classes, unscrewing devices
• design of the threaded fastenings

removable non threaded connections

• shaft-hub connections, keys and tabs, plugs and pins, grooved connections
• transverse keys, safety rings or stop collars

parts of machinery ( representation only )

• transmission of rotary motion (gears, belts and pulleyes, joints )
• devolution pairs (plane bearings, roller bearings )
• roller bearings ( criteria of selection )
• springs

Course entry requirements

Course structure and teaching

Lectures (hours/year in lecture theatre): 32
Practical class (hours/year in lecture theatre): 34
Practicals / Workshops (hours/year in lecture theatre): 60

Suggested reading materials

E.Chirone, S.Tornincasa. Disegno tecnico industriale. Voll 1 e 2. edizione Il Capitello.

L.Baldassini. Vademecum per Disegnatori e Tecnici. edizione. Hoepli.

Testing and exams

Students of mechanical are expected to draft a project during the course. There will be two test at the end of the course : a computer test and a graphic test. The oral exam may be replaced by a multiple choice questionnaire.