Search for dissertations about: "Weld quality"

Showing result 16 - 20 of 51 swedish dissertations containing the words Weld quality.

  2. 16. Mechanical Properties of Resistance Spot Welds in Lightweight Applications

    Author : Davood Afshari; Zuheir Barsoum; Arne Melander; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Spot Weld; Aluminum alloy; Mechanical Properties; Finite Element; SRA - Production; SRA - Produktion;

    Abstract : This licentiate thesis is concerned with residual stresses in aluminum alloy 6061-T6 resistance spot welded joint. Several topics related to mechanical strength of welded structures are treated such as; nugget size and microhardness and microstructures of weld zone and their influence on mechanical strength of welded structure, failure load measurement using tensile-shear test, resistance spot welding simulation, residual stress measurement by X-ray diffraction method and analysis effect of welding parameters on the mechanical strength and the residual stresses. READ MORE

  4. 17. Laser-welded corrugated core steel sandwich bridge decks

    Author : Peter Nilsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fatigue; steel sandwich; Bridge deck; corrugated core; laser-weld;

    Abstract : Steel bridge decks are often used for applications when a lightweight structure is sought for. Conventional orthotropic steel decks suffers from drawbacks in several aspects, including high production costs and durability problems. READ MORE

  5. 18. Monitoring and Control of Robotized Laser Metal-Wire Deposition

    Author : Almir Heralic; Alexander Kaplan; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Laser Metal Wire Deposition; Additive Layer Manufacturing; Robotic Weld Equipment; Optical Sensors; Process Control; Process Development; Process Stability; Iterative Learning Control; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : The thesis gives a number of solutions towards full automation of the promising manufacturing technology Robotized Laser Metal-wire Deposition (RLMwD). RLMwD offers great cost and weight saving potentials in the manufacturing industry. READ MORE

  6. 19. Simulation-based feedback control of welding processes

    Author : Fredrik Sikström; Bengt Lennartson; Gunnar Bolmsjö; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Finite element modelling; Heat transfer; Model order reduction; Sensors; Weld simulation Controller design; Automatic control; Reglerteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : Fusion welding for joining of metals is an important manufacturing process widely used in industry, and very appreciated for its usefulness. This thesis presents a strategy dealing with the problem of designing feedback control for robotised welding. READ MORE

  7. 20. Thermo-electric temperature measurements in friction stir welding : Towards feedback control of temperature

    Author : Ana Magalhães; Gunnar Bolmsjö; Jeroen De Backer; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; FSW; Robotic; Temperature; TWT; Plunge; Control; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : Friction Stir Welding has seen a fast uptake in many industry segments. Mechanical properties superior to fusion welding, the ability to weld "unweldable" aluminium alloys and low distortion are often described as the main reasons for the fast industrial implementation of FSW. Most existing applications consist of long straight welding joints. READ MORE