The light source for green laser welding uses laser light-emitting diodes, which can be precisely focused on the welding spot through an optical system. The advantage of laser welding is that it can precisely control and optimize the energy required for welding. Its applicable occasions are selective reflow soldering process or connectors using tin wire. If it is an SMD component, you need to apply solder paste first, and then solder. The soldering process is divided into two steps: First, the solder paste needs to be heated, and the solder joints are also preheated. After that, the solder paste used for soldering is completely melted, the solder completely wets the pad, and finally the solder is formed. Using laser generator and optical focusing assembly welding, high energy density, high heat transfer efficiency, non-contact welding, solder can be tin paste or tin wire, especially suitable for welding small solder joints in narrow spaces or small solder joints with low power and energy saving .
Laser welding features:
Multi-axis servo motor board control, high positioning accuracy
The laser spot is small, and it has obvious welding advantages on small-sized pads and pitch devices
Non-contact welding, no risk of mechanical stress and static electricity
No tin slag, reduce the waste of flux, low production cost
Rich types of weldable products
Many solder options
Advantages of laser welding:
For ultra-small electronic substrates and multilayered electrical components, the "traditional process" is no longer applicable, which has prompted rapid technological progress. It is not suitable for the processing of ultra-fine parts of the traditional soldering iron method, which is finally completed by laser welding. "Non-contact welding" is the biggest advantage of laser welding. There is no need to touch the substrate and electronic components at all, and the supply of solder only by laser irradiation does not cause a physical burden. Effective heating with a blue laser beam is also a big advantage. It can irradiate narrow parts where the soldering iron tip cannot enter and when there is no distance between adjacent components in dense assembly. The soldering iron tip needs to be replaced regularly, but laser welding requires very few parts to be replaced, and the maintenance cost is low.