The following work describes the upgrade of a welding cell used for welding of portable cabin floor frames. A new measuring system using laser line sensors, replaced the cell’s original system, that used laser displacement sensors. The main reason for the upgrade, are local variations of gap widths of welding joints, that arise from various geometrical or form deviations of components. The new measuring system now measures all of the welding joints and determines the weld trajectories of individual welds. The configuration of a measuring task on a 2D profile of a welding joint is shown. Analysis of measurements of gap widths of individual welding joints of the forklift pocket openings is presented. The discussion part focuses on those welding joints, which have the potential for possible adjustments, that would improve the reliability of measurements and the quality of welding. The results show, that the gap width variations of several weld joints, are mostly influenced by plasma cuts in hollow profiles and forklift pocket’s lower plates, that deviate too much from their assigned dimensional tolerances. Noticeable measurement errors that are caused by obstructions on separate welding jigs and poor weld preparation, were also observed. Additionally, cases of primer intrusion into hollow sections during corrosion protection process, were analysed. The results show a considerable increase in the quality of welding, after the upgrade.
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