Search for dissertations about: "yt- och materialvetenskap"

Showing result 1 - 5 of 28 swedish dissertations containing the words yt- och materialvetenskap.

  1. 1. Tribology in Metal Working

    University dissertation from Uppsala : Uppsala University, Department of Engineering Sciences

    Author : Maria Nilsson; Uppsala universitet.; Högskolan Dalarna.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk fysik med inriktning mot tribomaterial; Engineering Science with specialization in Tribo Materials; Tribology; friction; wear; metal working; coatings; wire drawing; hot work rolls; Stålformning och ytteknik; tribology;

    Abstract : This thesis focuses on the tribological performance of tool surfaces in two steel working operations, namely wire drawing and hot rolling. In all forming operations dimensions and surface finish of the products are of utmost importance. READ MORE

  2. 2. Plasma arc welding simulation with OpenFOAM

    University dissertation from Göteborg, Sweden : Chalmers University of Technology

    Author : Margarita Sass-Tisovskaya; Högskolan Väst.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : A simulation tool that is valid within the field of tandem arc welding(unsteady, three dimensional thermal plasma flow) has been developed,based on the open source CFD package OpenFOAM. The validation of the electromagnetic part of the solver has been done separately using a problem with a known solution. READ MORE

  3. 3. The Absorption of Laser Light by Rough Metal Surfaces

    University dissertation from Göteborg, Sweden : Chalmers University of Technology

    Author : David Bergström; Mittuniversitetet.; Luleå tekniska universitet.; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap; absorptance; reflectance; laser; metals; roughness; integrating sphere; Produktionsutveckling; Manufacturing Systems Engineering;

    Abstract : In Laser Material Processing of metals, an understanding of the fundamental absorption mechanisms plays a vital role in determining the optimum processing parameters and conditions. The absorptance, which is the fraction of the incident laser light which is absorbed, depends on a number of different parameters. READ MORE

  4. 4. Modeling and simulation for welding automation

    University dissertation from Göteborg : Chalmers

    Author : Fredrik Sikström; Högskolan Väst.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Materials science Other processing assembly; TEKNIKVETENSKAP Teknisk materialvetenskap Övrig bearbetning sammanfogning; Manufacturing and materials engineering; Produktions- och materialteknik; welding automation; fixturing; finite element modeling; heat conduction; model order reduction; sensors; welding simulation; controller design; Welding automation; Heat conduction; Model order reduction; Finite element modeling; Controller design; Welding simulation; Sensors; Fixturing;

    Abstract : Fusion welding of metals is an important manufacturing process. This thesis presents a modeling and simulation strategy for welding automation. It deals with the problem of mitigating discontinuities caused by this process, and focus is on a high joint performance and structural integrity. READ MORE

  5. 5. Simulation of robotic TIG-welding

    University dissertation from Lund : Lund Institute of Technology

    Author : Mikael Ericsson; Högskolan Väst.; [2003]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Materials science Other processing assembly; TEKNIKVETENSKAP Teknisk materialvetenskap Övrig bearbetning sammanfogning; TECHNOLOGY Other technology; TEKNIKVETENSKAP Övriga teknikvetenskaper; Manufacturing and materials engineering; Produktions- och materialteknik; Robotics; Bågsvetsning; robotteknik;

    Abstract : Robotised welding is one of the most important robot tasks used in manufacturing industry. The operator usually performs the programming of the robot manually, i.e. by jogging the robot arm to each coordinate pose in space. READ MORE