1. Izdelava plk programa za robotsko celico za posluževanje cnc strojaKlemen Vrentuša, 2024, undergraduate thesis Abstract: Diplomska naloga se osredotoča na avtomatizacijo posluževanja CNC stroja z uporabo kolaborativnega robota DOBOT. Naloga zajema razvoj in implementacijo PLK programa za Siemensov programabilni krmilnik S7-1214C, pri čemer je za programiranje uporabljen TIA Portal. Operater vnese željene parametre preko uporabniškega panela, ki je nameščen na robotski celici, komunikacija med panelom in krmilnikom pa poteka preko PROFINET protokola. Prav tako je vzpostavljena komunikacija med robotom in krmilnikom s pomočjo MODBUS protokola. V nalogi je opisana vzpostavitev MODBUS komunikacije in razvoj programa, ki ustreza specifičnim zahtevam robotske celice. Opisan sistem omogoča operaterju, da hkrati upravlja več CNC strojev, kar povečuje operativno učinkovitost in zmanjšuje potrebo po človeškem nadzoru.
Keywords: Avtomatizacija, PLK, industrija, robotska celica, CNC stroja
Published in DKUM: 06.05.2025; Views: 0; Downloads: 11
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2. Nadgradnja naprave za ekstrudiranje plastikeDomen Rožman, 2024, undergraduate thesis Abstract: Diplomsko delo je izdelano v sodelovanju s podjetjem Polycom d.o.o. Škofja Loka. Delo zajema nadgradnjo obstoječe naprave za ekstrudiranje plastike, saj so se med delom na njej pokazale številne napake in pa potrebe po izboljšavah. Potrebno bo bilo opraviti več manjših izboljšav in pa tudi samostojno izdelati nekatere elemente. Izboljšave so potrebne za enostavnejše in bolj učinkovito upravljanje z napravo. Vsa tehniška dokumentacija bo izdelana s programom Solidworks, elektro načrti pa s programom EPlan. Nadgradnja bo razdeljena na več podsklopov, ki bodo zajemala več načinov dela, in sicer na strojni in programski del. Strojni del bo razdeljen na podsklope, in sicer doziranje materiala, praznjenje materiala ter kontrola teka materiala. Pri doziranju materiala bomo kot nadgradnjo, dodali dozirnik z motorjem in izdelali stojalo ter po potrebi ocenili, če je za nadgradnjo potrebna še kakšna dodelava. V namen procesa praznjenja, bomo izdelali posodo za odvzem materiala in voziček za posodo. Predelali bomo tudi obstoječi voziček za dozirnik z motorjem. Dodali bomo tudi senzorje in merilnike, ki bodo služili za nadzor teka materiala. Z omenjenimi nadgradnjami se bo olajšalo delo na napravi in izboljšala se bo tudi sama produktivnost naprave.
Keywords: nadgradnja naprave, ekstrudiranje, kompavndiranje, Solidworks, TIA Portal, EPlan
Published in DKUM: 06.05.2025; Views: 0; Downloads: 3
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3. Predictive modelling of weld bead geometry in wire arc additive manufacturingKristijan Šket, Miran Brezočnik, Timi Karner, Rok Belšak, Mirko Ficko, Tomaž Vuherer, Janez Gotlih, 2025, original scientific article Abstract: This study investigates the predictive modelling of weld bead geometry in wire arc additive manufacturing (WAAM) through advanced machine learning methods. While WAAM is valued for its ability to produce large, complex metal parts with high deposition rates, precise control of the weld bead remains a critical challenge due to its influence on mechanical properties and dimensional accuracy. To address this problem, this study utilized machine learning approaches—Ridge regression, Lasso regression and Bayesian ridge regression, Random Forest and XGBoost—to predict the key weld bead characteristics, namely height, width and cross-sectional area. A Design of experiments (DOE) was used to systematically vary the welding current and travelling speed, with 3D weld bead geometries captured by laser scanning. Robust data pre-processing, including outlier detection and feature engineering, improved modelling accuracy. Among the models tested, XGBoost provided the highest prediction accuracy, emphasizing its potential for real-time control of WAAM processes. Overall, this study presents a comprehensive framework for predictive modelling and provides valuable insights for process optimization and the further development of intelligent manufacturing systems.
Keywords: wire arc additive manufacturing, WA AM, predictive modelling, machine learning, weld bead geometry, XGBoost
Published in DKUM: 13.03.2025; Views: 0; Downloads: 6
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4. Izdelava in aktivacija mehkega hasel aktuatorja : magistrsko deloMiha Ciglarič, 2024, master's thesis Abstract: V sklopu magistrskega dela je predstavljena izdelava in aktivacija mehkega peano HASEL aktuatorja. Družina mehkih HASEL aktuatorjev je zanimiva zaradi delovanja podobnega mišicam sesalcev. Te izkazujejo zmožnost: samozaznavanja deformacije, »celjenja«, linearnega pomikanja in ponujajo možnost paralelne uporabe. Tehnologija je navidezno enostavna, vendar zahteva podrobno razumevanje posamičnih bistvenih komponent sistema: telo aktuatorja, elektrode in napajalnega sistema, katerih delovanje je medsebojno odvisno. Tip aktuatorjev je relativna novost na tržišču in se nahaja v fazi razvoja. Natančno modeliranje (dimenzioniranje) sistema zaradi več nedoločenih spremenljivk ni mogoče. Izdelava v praksi zahteva uporabo številnih naprednih materialov in proizvodnih tehnik, ki so težko dostopne. V sklopu naloge sem preko enostavnega geometrijskega modela določil bistvene lastnosti vsake komponente peano HASEL aktuatorja. Na osnovi natančnega poznavanja delovanja sistema, sem izbral dostopne materiale in proizvodne tehnike, na osnovi katerih sem izdelal delujoči aktuator.
Keywords: izdelava, aktivacija, HASEL, aktuator, umetna mišica
Published in DKUM: 13.02.2025; Views: 0; Downloads: 28
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5. DIGITALNI DVOJČEK LINIJE S12 V PODJETJU BSH : magistrsko deloJure Golavšek, 2024, master's thesis Abstract: V magistrskem delu je predstavljen digitalni dvojček linije S12 v podjetju BSH Nazarje. Zaključno delo zajema predstavitev linije in programske opreme Tecnomatix Plant Simulation. Prikazano je izdelovanje digitalnega dvojčka in nastavljanje parametrov za pravilno delovanje. Sledi analiza, v kateri smo preizkusili različne scenarije, kot so spreminjanje števila delavcev in parametrov ter postavitev elementov, ki bi lahko pripomogli k optimizaciji proizvodnje linije. Na koncu so predstavljene ugotovitve in izboljšave, načrtovana je tudi paletizacija s pomočjo robotske roke in avtomatiziranega transporta. S pomočjo digitalnega dvojčka smo uspešno dosegli cilj magistrske naloge in izboljšali proizvodni sistem.
Keywords: digitalni dvojček, optimizacija, simulacija, robotika
Published in DKUM: 06.02.2025; Views: 0; Downloads: 0 |
6. Modelling and analysis of the ionospheric impact on observables in low earth orbit monitoring systems for gnss : master's thesisDominik Zdelar, 2024, master's thesis Abstract: Ionospheric errors in the ionosphere are a major source of signal delays in Global Navigation Satellite System (GNSS) propagation, particularly in the 250-400 km region of the ionosphere, where high electron density occurs. This thesis develops a model to estimate electron density at 300 km, focusing on improving predictions of ionospheric delays in signal paths between Medium Earth Orbit (MEO) and Low Earth Orbit (LEO) satellites. The model utilizes simulated orbits on specific dates to account for varying solar flux strengths and compares results with data from the Swarm mission. The findings aim to enhance GNSS delay estimation and navigation accuracy regarding ionospheric errors.
Keywords: ionosphere, GNSS, model, MEO, LEO
Published in DKUM: 06.02.2025; Views: 0; Downloads: 22
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7. Posodobitev tračne žage z avtomatskim podajanjem : diplomsko deloNino Frumen, 2024, undergraduate thesis Abstract: V diplomskem delu je predstavljena posodobitev tračne žage z avtomatskim podajalnikom. Predstavljene so vse komponente, ki jih je bilo potrebno zamenjati, potek izdelave novega komandnega pulta in ustreznih nosilcev komponent. Prav tako je predstavljeno ponovno elektro ožičenje vseh komponent in izdelava novega elektro načrta v programu Eplan. Predstavljena pa je tudi izdelava novega HMI zaslona v programu TIA Portal in uporabnost programa optiCutter v proizvodnji. Na koncu so zapisana navodila za uporabo žage. Cilj diplomske naloge je bilo zagotoviti natančno delovanje žage in posledično hitrejše ter kvalitetnejše razrezovanje v proizvodnji.
Keywords: Eplan, elektro vezava, TIA portal, tračna žaga, avtomatski podajalnik
Published in DKUM: 15.01.2025; Views: 0; Downloads: 45
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8. Simulating and verifying a 2D/3D laser line sensor measurement algorithm on CAD models and real objectsRok Belšak, Janez Gotlih, Timi Karner, 2024, original scientific article Abstract: The increasing adoption of 2D/3D laser line sensors in industrial and research applications necessitates accurate and efficient simulation tools for tasks such as surface inspection, dimensional verification, and quality control. This paper presents a novel algorithm developed in MATLAB for simulating the measurements of any 2D/3D laser line sensor on STL CAD models. The algorithm uses a modified fast-ray triangular intersection method, addressing challenges such as overlapping triangles in assembly models and incorporating sensor resolution to ensure realistic simulations. Quantitative analysis shows a significant reduction in computation time, enhancing the practical utility of the algorithm. The simulation results exhibit a mean deviation of 0.42 mm when compared to real-world measurements. Notably, the algorithm effectively handles complex geometric features, such as holes and grooves, and offers flexibility in generating point cloud data in both local and global coordinate systems. This work not only reduces the need for physical prototyping, thereby contributing to sustainability, but also supports AI training by generating accurate synthetic data. Future work should aim to further optimize the simulation speed and explore noise modeling to enhance the realism of simulated measurements.
Keywords: 2D/3D laser line sensor, profilometry, simulation, point cloud, measurement generation, STL, Matlab
Published in DKUM: 10.01.2025; Views: 0; Downloads: 10
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9. A holistic approach to cooling system selection and injection molding process optimization based on non-dominated sortingJanez Gotlih, Miran Brezočnik, Snehashis Pal, Igor Drstvenšek, Timi Karner, Tomaž Brajlih, 2022, original scientific article Abstract: This study applied a holistic approach to the problem of controlling the temperature of critical areas of tools using conformal cooling. The entire injection molding process is evaluated at the tool design stage using four criteria, one from each stage of the process cycle, to produce a tool with effective cooling that enables short cycle times and ensures good product quality. Tool manufacturing time and cost, as well as tool life, are considered in the optimization by introducing a novel tool-efficiency index. The multi-objective optimization is based on numerical simulations. The simulation results show that conformal cooling effectively cools the critical area of the tool and provides the shortest cycle times and the lowest warpage, but this comes with a trade-off in the tool-efficiency index. By using the tool-efficiency index with non-dominated sorting, the number of relevant simulation cases could be reduced to six, which greatly simplifies the decision regarding the choice of cooling system and process parameters. Based on the study, a tool with conformal cooling channels was made, and a coolant inlet temperature of 20 °C and a flow rate of 5 L/min for conformal and 7.5–9.5 L/min for conventional cooling channels were selected for production. The simulation results were validated by experimental measurements.
Keywords: conformal cooling, injection molding, tooling, additive manufacturing, numerical simulation, non-dominated sorting
Published in DKUM: 05.12.2024; Views: 0; Downloads: 5
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10. Razvoj naprednega hladilnega sistema v podjetju Impol PCPGašper Kopše, 2024, undergraduate thesis Abstract: Diplomska naloga obravnava razvoj in implementacijo izboljšanega sistema oskrbe s tekočim dušikom za hlajenje orodja na 55 MN stiskalni liniji. Cilj naloge je bil odpraviti deformacijo materiala z uvedbo dodatne veje hladilnega sistema. Mehanizem vključuje namensko oblikovano konstrukcijo, proporcionalni sistem, krmilno enoto, senzorsko tehnologijo, pnevmatske in kriogenske elemente. Projekt smo začeli z modeliranjem, izdelavo in implementacijo vseh ključnih komponent hladilnega sistema. Po uspešni integraciji strojnih elementov smo nadaljevali z razvojem programske kode ter oblikovanjem uporabniškega vmesnika. S tem smo dosegli sinhronizacijo delovnega procesa, ustrezno regulacijo pretoka dušika, enakomerno hlajenje orodja in visoko kakovost izdelkov.
Keywords: hladilni sistem, avtomatizacija, proporcionalni mehanizem, PLK
Published in DKUM: 22.10.2024; Views: 0; Downloads: 17
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