Blar i NTNU Open på forfatter "Sørby, Knut"
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Mechanical Properties of AlSi10Mg Processed by Laser Powder Bed Fusion at Elevated Temperature
Hovig, Even Wilberg; S. Azar, Amin; M'hamdi, Mohammed; Sørby, Knut (Peer reviewed; Journal article, 2020)AlSi10Mg processed by laser powder bed fusion is expected to have remarkable mechanical properties due to the dominant cellular microstructure. However, the as-processed material is often both anisotropic and containing ... -
Metal Penetration in Additively Manufactured Venting Slots for Low-Pressure Die Casting
Hovig, Even Wilberg; Sørby, Knut (Journal article; Peer reviewed, 2018)Venting of excess gas and air in casting moulds is of critical importance to avoid defects such as misruns and porosities. Additive manufacturing give mould designers a possibility to make venting slots in large areas and ... -
Modeling and Simulation of Borregaard's Steam System - Construction, Validation and Utilization of the Model
Aasbø, Joakim Knut Snorre (Master thesis, 2016)The steam-system at Borregaard Sarpsborg big process plant consists of several kilometers of pipelines and different pressure-systems. The steam-system is the most important secondary aid system to Borregaard's main ... -
Optimization of Sample Size for Two-Point Diameter Verification in Coordinate Measurements
Chelishchev, Petr; Sørby, Knut (LNEE;volume 484, Journal article; Peer reviewed, 2019)This paper investigates the possibility for reduction of sample size for inspection of two-point diameters with a coordinate measuring machine, by use of statistical methods. The statistical methods implement the parametric ... -
A Pin-on-Disk Tribometer for Friction and Lubricating Performance in mm-Scale
Wu, Jian; Liu, Tonggang; Yu, Ning; Cao, Jiejie; Wang, Kesheng; Sørby, Knut (Peer reviewed; Journal article, 2021)A pin-on-disk tribometer for micro-scale applications is presented in this paper. The tribometer consists of a stationary mm-scale pin and a rotating disk. Friction and lubrication film thickness are measured by a laser ... -
Pneumatic Components and Alumina Feeding Equipment HAL4e
Øystese, Simen Vatslid (Master thesis, 2015)This thesis presents the current design variations and possible solutions for optimisation of the alumina distribution system for the next generation aluminium production cell. The alumina distribution system is of high ... -
Precision turning with instrumented vibration-damped boring bars
Sørby, Knut; Østling, Dan (Journal article; Peer reviewed, 2018)The paper presents the theoretical background and experimental results with a new approach for achieving high accuracy in finish turning with slender tools. The approach is developed especially for high-accuracy turning ... -
Robust estimation of optimal sample size for CMM measurements with statistical tolerance limits
Chelishchev, Petr; Popov, Aleksandr; Sørby, Knut (Journal article; Peer reviewed, 2018)The paper proposes the kernel probability density function approach to estimate the distribution of measurements on a part which is measured in a coordinate measuring machine (CMM). The study is based on the experimental ... -
Robust og fleksibel automatisert montasje av trykkluftskoblinger
Sjølie, Peter (Master thesis, 2017)Kongsberg Automotive Raufoss (KA) produserer et stort antall ulike koblinger til trykkluftssystemer på større kjøretøy. Hoveddelen av koblingene benyttes i bremsesystemer, og som følge av sikkerhetskravene stilles det svært ... -
Sample Strategies, Data Processing and Algorithms for Coordinate Measurements
Chelishchev, Petr (Doctoral theses at NTNU;2020:259, Doctoral thesis, 2020)The PhD thesis proposes new approaches and algorithms related to the field of Geometrical Dimensioning and Tolerancing (GD&T) inspection based on ISO standards on Geometrical Product Specifications (GPS). The main purpose ... -
Simulation Algorithm of Sample Strategy for CMM Based on Neural Network Approach
Chelishchev, Petr; Sørby, Knut (Chapter, 2020)This paper proposes the algorithm for analyses of sample strategies. The back propagation artificial neural network approach is employed to approximate CMM measurements of the circular features of the aluminum workpieces ... -
Simulation and Validation of a Vibrating Boring Bar
Ryland, Audun (Master thesis, 2023)Dempede dreiebomer har blitt populær i maskinerings industrien grunnet deres evne til å unngå vibrasjoner under bearbeiding. Deres egenskaper gir økt levetid på vendeskjær(kuttende del av verktøyet), muliggjør høyere ... -
Simulation of vibrations in machining with Comsol Multiphysics
Nordru, Øyvind Bjåland (Master thesis, 2022)Vibrasjons dempende verktøy minker vibrasjon under prosesser som innebærer material fjerning. Slike maskinprosesser utsetter verktøyet for store krefter, og vibrasjoner kan oppstå. Nøkkelen til å hindre økningen av ... -
Spenninger og deformasjoner i additivt tilvirkede komponenter
Arendal, Jan Erik (Master thesis, 2014)Additiv lagvis tilvirkning (ALM) har etablert seg og revolusjonert produktutvikling og produksjonsteknologier i dagens industri. ALM kan i dag brukes til å lage fullverdige ferdige komponenter. Oppgaven ser på ALM der man ... -
Sustainability Assessment of Additive Manufacturing Processes
Lunetto, Vincenzo (Master thesis, 2017)Additive Manufacturing (AM) processes were developed in the 1980s to reduce the time for the realization of prototypes. Nowadays, AM processes are considered as real manufacturing techniques suitable to build end-use ... -
Testing av systemvirkningsgrad i bølgekraftomformer og utvikling av et energieffektivt bølgekraftsystem
Johnsen, Aleksander; Holmen, Andreas; Løge, Trygve Paulsen; Aune, Vetle (Bachelor thesis, 2023)Oppgaven omhandler testing av systemvirkningsgrad i en bølgekraftomformer, samt hydraulisk modifikasjon og videreutvikling av design og systemkomponenter. Det ble utarbeidet to aktuelle design for videre beregning og ... -
The effect of surface roughness on corrosion resistance of machined and epoxy coated steel
Hagen, Catalina Hoem Musinoi; Hognestad, Asbjørn; Knudsen, Ole Øystein; Sørby, Knut (Journal article; Peer reviewed, 2019)By incorporating periodic micro-patterns on steel substrates, the effect of surface roughness on corrosion resistance of a two-component polyamine cured epoxy mastic coating has been studied. Machining was employed to ... -
Towards Intelligent Process Control for Thermoplastics Injection Molding: Machine Learning for prediction of quality of injection molded parts
Ogorodnyk, Olga (Doctoral theses at NTNU;2021:71, Doctoral thesis, 2021)Injection molding is a process that is widely used for production of plastic parts of different shapes, sizes and applications. Some of its advantages are high production rates and efficiency. However, to be able to produce ... -
Uncertainty in Calibration of Reference Standards for Dimensional Measurements
Kjølstad, Camilla (Master thesis, 2019)Målelaboratoriet ved NTNU brukes til å kalibrere normaler (eng: reference standards) som brukes av Justervesenet for å verifisere andre måleinstrumenter. Normaler, som rektangulære parallellepiped og sylindere, blir kalibrert ... -
Utvikling av demonstrator for frekvensrespons og vibrasjonsdempning
Eide, Anders Neverdahl (Bachelor thesis, 2023)Bacheloroppgaven vil dokumenter utvikling av en fysisk demonstrator for frekvensrespons og vibrasjonsdemping tiltenkt bruk i undervisning. Demonstratoren skal bestå av en fysisk testrigg med tilhørende sensorer og hardware, ...