Sökning: "laser welding"

Visar resultat 11 - 15 av 63 uppsatser innehållade orden laser welding.

  1. 11. Laser-arc hybrid welding of high strength steel : Weld quality and process stability

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :David Lohse; [2021]
    Nyckelord :Laser; arc; hybrid; welding; high; strength; steel; high-strength; HSLA; weld quality; process stability;

    Sammanfattning : The development of high strength steel enables constructions to be made with less material than with previous used steel grades. The possibility of creating lightweight constructions with the same or even better mechanical properties is of high focus in the steel industry today. LÄS MER

  3. 12. Laserparametrars påverkan på svetsdjup och porbildning för lasersvetsade koppar-hairpins

    Kandidat-uppsats, Högskolan i Skövde/Institutionen för ingenjörsvetenskap

    Författare :Jessica Pettersson; [2021]
    Nyckelord :;

    Sammanfattning : Detta examensarbete handlar om lasersvetsning av koppar-hairpins som används som statorlindning i elmotorer. Vid lasersvetsning kan olika parametrar väljas som lasereffekt, matningshastighet med mera. LÄS MER

  4. 13. Laser ablation of aluminium before welding : Effect of weld preparation on number and sizes of pores

    Uppsats för yrkesexamina på avancerad nivå, KTH/Materialvetenskap

    Författare :Olivia Taivalkoski; [2021]
    Nyckelord :;

    Sammanfattning : Welding aluminium often results in porosity in the weld. One way to reduce porosity is by carful weld preparation and cleaning. In this master thesis report laser ablation was done on aluminium plates before welding to remove dirt and the surface oxide layer. LÄS MER

  5. 14. Techniques for Improving Weldability and Testing of Weld-bonded Joints

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Mattias Högsäter Myhr; [2020]
    Nyckelord :Adhesives; Automotive industry; Resistance Spot Welding; RSW; Weldability; Weld-bonding; Welding parameters; Fordonsindustri; Limning; Limpunktsvetsning; Motståndssvetsning; Punktsvetsning; Svetsbarhet; Svetsparametrar;

    Sammanfattning : Increased understanding of improving the weld-bonding process is essential in order for the automotive industry to constantly develop their designs and production processes for the energy-efficient vehicles of the future. The joining method of weld-bonding, a hybrid method of adhesive joining and resistance spot welding, has introduced new challenges in the manufacturing and design of auto bodies. LÄS MER

  7. 15. Modelling of Laser Welding of Aluminium using COMSOL Multiphysics

    Master-uppsats, KTH/Materialvetenskap

    Författare :Jie Chen; [2020]
    Nyckelord :laser welding process; aluminium alloy; thermal-mechanical; COMSOL Multiphysics; hot cracking; thermal model; CFD model; mechanical model; Marangoni effect; lasersvetsningsprocess; aluminiumlegeringar; termisk-mekanisk; COMSOL-flerfysik; hetsprickning; termisk modell; CFD-modell; mekanisk modell; Marangoni-effekt;

    Sammanfattning : This thesis presents a modelling approach of laser welding process of aluminium alloy from the thermo-mechanical point of view to evaluate the occurrence of hot cracking based on simulation results and relevant criteria. The model was created stepwise in COMSOL Multiphysics, starting with the thermal model where heat conduction of solid and liquid phase was computed. LÄS MER