Construction elements

Enrolment into the academic year.

Fundamentals of technical drawing: technical drawing, types of drawings, drawing tools, drawing formats, folding, scale, lines, technical writing.
Drawing: 2D and 3D projections, views, hatching, cross-sections, wrinkles, invisible edges, details.
Dimensioning: lengths, diameters, radii, angles, curves, inclination, cone, narrowing, holes, groove, layout of the dimensions, parallel and serial dimensioning.
Manufacturing technologies: turning, milling, drilling, additive manufacturing, manufacturing based dimensioning and technical documentation.
Labeling of the surface quality: micro-and macro-geometrical tolerance, definitions of the surface profiles, marking of the surface quality. Surface tailoring technologies (grinding, polishing, honing) and their effect on surface quality.
Tolerances and fits: deviations, tolerances of form, location, running, fits, fits systems, the size of the tolerance fields, the position of the tolerance fields, the choice of fits, the application of the fits in practice, recording of the deviations and tolerances.
Machine elements (drawing, nature, labeling, standards): threads, bolts, nuts, screw connection, washers, pins, dowels, groove shafts, bolts, cotter pins, snap rings, rivets, gears, gear pairs, sliding bearings, roller bearings.
Computer Aided Design: 2D in 3D programs for drawing, advantages and drawbacks, demonstration how to use programs (part, assembly, documentation processing)

1. S. Glodež, Tehnično risanje. Tehniška založba Slovenije, Ljubljana, 2012.
2. I. Prebil, Tehnična dokumentacija. Tehniška založba Slovenije, Ljubljana, 1995.
3. I. Prebil, R. Kunc, G. Marunić, B. Križan. Opisna geometrija. STRI svetovanje, 2011.
4. D. Whitehouse, Surfaces and their measurements. Hermes Penton Science, London, 2002.
5. G. Nieman, H. Winter, B.R. Hohn, Machinen-elemente. Springer, 2005.
6. R. L. Mott, E. M. Vavrek, J. Wang, Machine-Elements-in-Mechanical-Design. Pearson, 2014.

Objectives: Base objectives of the course are to provide the students basics about technical communication, technical documentation and performance of standard machine elements. The type and form of technical documentation, spatial projections and rules of technical documentation are defined. Standard form of presentation, classification and selection for basic construction elements is shown. Focus is also on assembly of construction elements, their tolerances and topographical properties of surfaces such as geometry, roughness, etc.

Competences:
Reading and recognizing different kinds of technical documentation.
Ability to design own drawings and technical documentation from sketch to assembly drawing.
Knowledge, analysis and defining tolerances for fitting contacts of construction elements.
Knowledge about surface properties, surface fabrication errors, measuring methods and evaluation of surface defects.
Knowledge and classification for standard construction elements.

Knowledge and understanding: A student independently presents and draws a technical object with all the necessary information about the dimensions, materials, quality, tolerances and other requirements.

Application: Design and understanding of the technical solutions in a standardized format.

Reflection: The ability to critically assess the suitability and optimality of specific technical solutions.

Transferable skills: The knowledge of technical standards is crucial for the cooperation with the technical staff in the design and construction of physical experiments.

Lectures, tutorials, homework (drawing).

Assessment of theoretical knowledge
Assessment of practical work.
grading: 5 (fail), 6-10 (pass) (according to the Statute of UL)

1. KALIN, Mitjan, ŽUGELJ, Blaž, LAMUT, Martin, HAMOUDA, Karim. Elastic and plastic deformation of surface asperities and their load-carrying mechanisms during the formation of a real contact area. Tribology International 178 (2023) 108067 1-9, doi: https://doi.org/10.1016/j.triboint.2022.108067 [COBISS-SI-ID 129711619]
2. VADIVEL, Hari Shankar, SOMBERG, Julian, KALIN, Mitjan, EMAMI, Nazanin. Tribological performance of a UHMWPE-based multiscale composite under different lubrication and loads. Lubrication Science 34 (2022) 480‐492. doi: https://doi.org/10.1002/ls.1603.
3. MATKOVIČ, Sebastjan, POGAČNIK, Aljaž, KALIN, Mitjan. Wear-coefficient analyses for polymer-gear life-time predictions: A critical appraisal of methodologies. Wear 480-481 (2021) 203944 1-12. doi: https://doi.org/10.1016/j.wear.2021.203944.
4. SIDDIQUI, muhammad shoaib naseem, POGAČNIK, Aljaž, KALIN, Mitjan, Influence of load, sliding speed and heat-sink volume on the tribological behaviour of polyoxymethylene (POM) sliding against steel. Tribology International 178 (2023) 108029 1-12. doi: https://doi.org/10.1016/j.triboint.2022.108029. [COBISS-SI-ID 129358083]
5. PUŠAVEC, Franci, STERLE, Luka, KALIN, Mitjan, MALLIPEDDI, Dinesh, KRAJNIK, Peter. Tribology of solid-lubricated liquid carbon dioxide assisted machining. CIRP annals. 2020, vol. 69, iss. 1, str. 1-4. doi: https://doi.org/10.1016/j.cirp.2020.04.033