Blar i NTNU Open på forfatter "Sørby, Knut"
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Effect of Lubricant Viscosity on the Friction Behavior of the mm-scale Specimen
Wu, Jian; Sørby, Knut (Chapter, 2021)The size of moving parts in MEMS (micro-electro-mechanical-systems) is often in the mm-scale or smaller. Affected by the size effect, the friction in the mm-scale is different from the friction larger systems. In this ... -
Effect of Processing Parameters on the Relative Density of AlSi10Mg Processed by Laser Powder Bed Fusion
Hovig, Even Wilberg; Holm, Håkon Dehli; Sørby, Knut (Chapter, 2019)In order for a material processed by laser powder bed fusion (LPBF) to achieve the desired mechanical properties, the relative density of the material should be as high as possible. In this study, the effect of various ... -
Effect of Processing Parameters on the Relative Density of AlSi10Mg Processed by Laser Powder Bed Fusion
Hovig, Even Wilberg; Holm, Håkon Dehli; Sørby, Knut (Journal article, 2019)In order for a material processed by laser powder bed fusion (LPBF) to achieve the desired mechanical properties, the relative density of the material should be as high as possible. In this study, the effect of various ... -
Estimation of minimum volume of bounding box for geometrical metrology
Chelishchev, Petr; Sørby, Knut (Peer reviewed; Journal article, 2020)This paper presents algorithms for estimating the minimum volume bounding box based on a three-dimensional point set measured by a coordinate measuring machine. A new algorithm, which calculates the minimum volume with ... -
Formation of Built-Up Layer on the Tool in Turning Operation of Magnesium Alloys
Tomac, Nikola; Sørby, Knut; Doboviček, Sandro (Journal article; Peer reviewed, 2018)The present work highlights some factors which affect formation of a protective built-up layer (BUL) on the rake face of the cutting tool when cutting magnesium alloys. This work suggests that BUL can positively affect ... -
High cycle fatigue life estimation of AlSi10Mg processed by laser powder bed fusion
Hovig, Even Wilberg; S. Azar, Amin; Sunding, Martin Fleissner; Sørby, Knut; M'hamdi, Mohammed; Andreassen, Erik (Journal article; Peer reviewed, 2018)Fatigue life is known to be dependent on the surface properties of the material. Surface roughness provokes local stress concentration and cause crack initiation even at minute cyclic loads. In laser powder bed fusion, the ... -
High cycle fatigue life estimation of materials processed by laser powder bed fusion
Hovig, Even Wilberg; S. Azar, Amin; Sunding, Martin Fleissner; Andreassen, Erik; Sørby, Knut (Journal article, 2019)The fatigue life of metal components is known to depend on the surface topography. For components made by laser powder bed fusion, the roughness of the as‐built surfaces depends on the orientation of the component surface ... -
High-Pressure Cooling in Turning of Inconel 625 with Ceramic Cutting Tools
Sørby, Knut; Vagnorius, Zydrunas (Journal article; Peer reviewed, 2018)Machining of heat resistant aerospace materials such as Inconel 625 or Inconel 718 is characterized by low cutting speeds, high tool wear rate, and high production costs. The machinability of heat resistant super alloys ... -
Improvement of the Positioning Accuracy of Industrial Robots
Johnsrud, Vegard (Master thesis, 2014)Industriroboter er godt kjent for sin høye repeterbarhet, noe som reflekteres i deres hovedbruksområde i industrien, deriblant pick and place -operasjoner og punktsveising. Med det økende behovet for automatisering i ... -
Improving the Accuracy of a Five-Axis Machine Tool by Laser Tracker Calibration - Geometric Error Compensation
Ellingsdalen, Simen H. (Master thesis, 2021)En av hovedegenskapene til en velfungerende verktøymaskin er dens repeterbarhet og nøyaktighet. Når antall akser i en verktøymaskin øker, øker også potensialet for feil. Denne oppgaven fokuserer på å finne alle de geometriske ... -
An investigation of the anisotropic properties of heat-treated maraging steel grade 300 processed by laser powder bed fusion
Hovig, Even Wilberg; S. Azar, Amin; Solberg, Klas; Sørby, Knut (Peer reviewed; Journal article, 2021)In order to explore the possibilities enabled by laser beam powder bed fusion of metals (PBF-LB/M), reliable material models are necessary to optimize designs with respect to weight and stiffness. Due to the unique processing ... -
Laserbasert måling av verktøyposisjon
Reberg, Andreas (Master thesis, 2019)Sandvik Coromant ønsket et prosjekt for å kartlegge hvorvidt laserbasert måling av verktøyposisjon kan være et av deres neste prosjekter, for å fortsatt være markedsledende på høyteknologisk maskineringsutstyr også i årene ... -
Machinability of Low-Lead and Lead-Free Brass Alloys
Müller, Magdalena Susanne (Doctoral thesis, 2024) -
Machine Learning of Quality Assurance in Polymer Powder Bed Fusion Additive Manufacturing
Baturynska, Ivanna (Doctoral theses at NTNU;2020:120, Doctoral thesis, 2020)The latest developments in the field of additive manufacturing (AM) have led to the wider use of this technology for the production of end-user products. As a result, more stringent requirements are set to the quality of ... -
Maskinering av blyfri messing
Teigen, Håvard (Master thesis, 2020) -
Massedemper for verktøyholdere Design og produksjon av dempesystem ved bruk av additiv tilvirkning
Aune, Håvard (Master thesis, 2019)Silent Tools™ er varemerket til de vibrasjonsdempende verktøyholderne som produseres av Sandvik Coromant i Trondheim. Når lengden på en verktøyholder skaper et overheng er den største utfordringen vibrasjoner, noe som kan ... -
Måleusikkerhet ved koordinatmålemaskin av flymotoraksling
Gundersen, Kenneth (Bachelor thesis, 2021)Abstract will be available on 2024-07-01 -
A measuring method for micro force based on MEMS planar torsional spring
Wu, Jian; Liu, Tonggang; Wang, Kesheng; Sørby, Knut (Peer reviewed; Journal article, 2020)In order to measure the micro force in a micro-nano device, a new measuring method for micro force is introduced. In this paper, a measuring system based on a micro-electro-mechanical systems (MEMS) planar torsional spring ... -
Mechanical Design Iteration of an Optical Slit Holder for Use in a Low Earth Orbit CubeSat Hyperspectral Imager
Tømmermo, Jørgen Forberg; Brovold, Håvard Heen; Vitsø, Torbjørn (Bachelor thesis, 2022)HYPerspectral Smallsat for Ocean observation (HYPSO)-prosjektet ved NTNU Small Satellite Laboratory bruker hyperspektrale bildeapparater i en kube-satellitt for jordobservasjonsformål. Det hyperspektrale bildeapparatet ... -
Mechanical performance of thermoplastic elastomers for two-component injection moulding
Persson, Anna-Maria Märta Ruth (Doctoral theses at NTNU, 2022:350, Doctoral thesis, 2022)The thesis is based on studies of the mechanical properties of thermoplastic elastomers (TPEs). A TPE is a soft thermoplastic polymer material with rubber-like properties. Vulcanizate TPEs (TPVs) were selected as the main ...