Browsing by Author "Martins Meco, Sonia"

Now showing 1 - 2 of 2
  • Thumbnail Image
    ItemOpen Access
    Expert Laser System: Practical application for keyhole welding
    (Association of Industrial Laser Users, 2017-09-30) Martins Meco, Sonia
    Laser processing is currently highly dependent on user knowledge and experience to choose correct parameters to obtain a reliable and high quality joints. Alternatively for every new application or different laser system a new process development is required. This is the reason that laser processing is often called as ‘black art’ which limits the exploitation of laser based production process in industry. The development of the Expert Laser System (ELS) for keyhole CW laser welding greatly simplifies the selection of laser welding parameters.
  • Thumbnail Image
    ItemOpen Access
    Selection of processing parameters in laser microwelding. Part 1: Continuous wave (CW) mode
    (Old City Publishing, 2020-07-01) Coroado, J.; Ganguly, Supriyo; Suder, Wojciech; Williams, Stewart; Martins Meco, Sonia; Pardal, Goncalo
    A phenomenological model which specifies the penetration depth and width of the fusion zone in laser microjoining can be a very useful tool in achieving the required welding parameters for a desired application. In this study the power factor model, previously established and validated in macrowelding, has been tested in fibre laser microwelding, enabling achievement of a particular weld independently of a laser system. Differ-ent weld profiles in aluminium and stainless steel were correlated with various combinations of parameters for a wide range of beam diameters. It has been shown that the same penetration depth can be achieved with different weld profiles. A similar trend, as previously found in macrow-elding, has been confirmed in microwelding. It was demonstrated that the depth of penetration can be kept constant independently of the laser sys-tem until certain limit of beam size.