Masters Degree Dissertations

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Browsing Masters Degree Dissertations by Author "Muwanga, Godfrey Fred"

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    Design of a novel annular recess electrode for resistance spot welding
    (Kyambogo University (Unpublished work), 2024-10) Muwanga, Godfrey Fred
    The effectiveness and longevity of resistance spot welding (RSW) hinge significantly on the geometry of welding electrodes, a critical factor influencing weld characteristics and electrode lifespan. Achieving an optimal electrode design requires a delicate balance between electric current density distribution and thermal-mechanical stiffness. However, improving one aspect often comes at the expense of the other. This study addresses this challenge by proposing an innovative electrode design featuring an annular recess filled with a refractory material. In electrode design, the well-established trade-off between current density distribution and thermal-mechanical stiffness is crucial. Neglecting either factor welding current or nugget diameter can result in accelerated wear and compromise the integrity of the weld. It underscores the importance of considering both elements to ensure optimal weld quality and performance. The novel electrode design with an annular recess aims to strike a harmonious balance between these competing considerations. This research hypothesizes that such a design configuration has the potential to yield stronger weld joints. The primary objective of this study is to design an electrode that would ensure optimal weld quality and performance. To achieve this, resistance spot welding parameters are identified and optimized. By delving into the intricacies of this innovative electrode design, the research endeavours to offer valuable insights for improving the overall performance and longevity of resistance spot welding processes.