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Št. zadetkov: 8
ǂA ǂnovel cryogenic machining concept based on a lubricated liquid carbon dioxide
Damir Grguraš, Luka Sterle, Peter Krajnik, Franci Pušavec
Izvirni znanstveni članek
Oznake: cryogenic machining;carbon dioxide;single-channel MQL;solubility;cooling;lubrication;
A novel single-channel supply of pre-mixed (a) liquid carbon dioxide (LCO2) and (b) oil - delivered via minimum quantity lubrication (MQL) - represents a significant advancement in cryogenic-machining technology. In this proof-of-concept study, an attempt is made to advance the understanding of the ...
Leto: 2019 Vir: Fakulteta za strojništvo (UL FS)
ǂThe ǂeffects of grit properties and dressing on grinding mechanics and wheel performance
Nastja Macerol, Luiz Franca, Radovan Dražumerič, Peter Krajnik
Izvirni znanstveni članek
Oznake: cubic boron nitride;grinding;dressing;grinding wheel;evaluation;
This paper introduces an analytical assessment framework for evaluating grinding wheel performance derived from the model of cutting and sliding grinding force components. Four new parameters are proposed based on wheel topography. These parameters are normalized through the aggressiveness number, w ...
Leto: 2022 Vir: Fakulteta za strojništvo (UL FS)
Grinding of cemented carbide using a vitrified diamond pin and lubricated liquid carbon dioxide
Deepa Kareepadath Santhos, Franci Pušavec, Peter Krajnik
Izvirni znanstveni članek
Oznake: diamond;grinding;cemented carbides;cooling-lubrication;carbon dioxide;
Despite extensive research on grinding of cemented carbide, few studies have examined abrasive machining of this material using small-diameter super abrasive tools (also known as grinding pins/points), especially with respect to varying cooling-lubrication methods. This study therefore focuses on a ...
Leto: 2023 Vir: Fakulteta za strojništvo (UL FS)
Mechanics of self-rotating double-disc grinding process
Radovan Dražumerič, Jeffrey A. Badger, Tomas Gustavsson, Peter Krajnik
Izvirni znanstveni članek
Oznake: grinding;bearing;double disc;
Unlike most double-disc grinding processes, which use forced workpiece rotation, some double-disc processes rely on workpiece self-rotation driven by non-uniform shear forces resulting from partial wheel-workpiece coverage. This self-rotation is poorly understood, with workpiece angular frequency re ...
Leto: 2022 Vir: Fakulteta za strojništvo (UL FS)
Tribology of solid-lubricated liquid carbon dioxide assisted machining
Franci Pušavec, Luka Sterle, Mitjan Kalin, Dinesh Mallipeddi, Peter Krajnik
Izvirni znanstveni članek
Oznake: machining;lubrication;friction;
An investigation is made into the lubrication capabilities of solid-lubricated liquid carbon dioxide (LCO2)incomparison toflood lubrication, straight LCO2and oil-lubricated LCO2(MQL). The coefficient of friction isdetermined via tribological experiments, similar to machining, using an open tribomete ...
Leto: 2020 Vir: Fakulteta za strojništvo (UL FS)
On mechanics and monitoring of plunge-roll rotary dressing of grinding wheels
Jeffrey A. Badger, Philipp Hoier, Stefano Vindemmio, Francesco Nigro, Radovan Dražumerič, Peter Krajnik
Izvirni znanstveni članek
Oznake: dressing;grinding wheel;grinding;
Leto: 2023 Vir: Fakulteta za strojništvo (UL FS)
Vloga šolskega svetovalnega delavca na področju razredne klime
Petra Krajnik, Jernej Kovač
Magistrsko delo
Oznake: magistrska dela;razredna klima;šolski svetovalni delavci;učenci;učitelji;starši;
V teoretičnem delu magistrskega dela opisujemo splošna teoretična izhodišča o razredni klimi. Opisujemo načine merjenja razredne klime, njen vpliv na učno uspešnost in samopodobo učencev ter strategije za vzpostavljanje pozitivne razredne klime. Še posebej se v teoretičnem delu osredotočamo na vlogo ...
Leto: 2019 Vir: Filozofska fakulteta (UM FF)
Prostovoljstvo in zaposljivost mladih v Sloveniji
Petra Krajnik, Miran Lavrič
Magistrsko delo
Oznake: magistrska dela;prostovoljstvo;zaposljivost;mladi;Slovenija;
Namen magistrskega dela je ugotoviti, ali obstaja povezanost med ukvarjanjem s prostovoljskimi aktivnostmi in višjo stopnjo zaposljivosti mladih. V teoretičnem delu smo predstavili splošna teoretična izhodišča o prostovoljstvu in zaposljivosti mladih ter se osredotočili na dosedanje raziskave o pove ...
Leto: 2020 Vir: Filozofska fakulteta (UM FF)
Št. zadetkov: 8
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