How can THT soldering with solder wire be optimized in terms of cycle time at high volumes?
Soldering with solder wire always requires two successive processes: the feeding of the solder wire and the melting through the heat input. It is not possible to carry out both processes simultaneously. Finally, the tip of the solder wire must first be positioned in order to achieve an exact soldering result. This can be disadvantageous, especially with high production volumes.
Because positioning and subsequent melting require additional production time, there is a savings potential of 0.4-0.9 sec. For example, the classic laser soldering process requires 0.3 sec. each for feeding and retracting the wire. If these partial steps are avoided, 0,6 sec. can be saved.
This is made possible by SRS soldering. Here, pre-assembled solder rings are placed on and around THT pins, which are then melted by means of laser, piston or induction soldering processes, but also using IR emitters or hot air. Since the placement of the solder rings is decoupled from the actual soldering process, both individual steps can be carried out simultaneously. Especially with high production volumes, this decoupling is a factor for cycle time optimization that should not be underestimated. Although this often only saves a few milliseconds, in the long run it adds up to a considerable time saving for very large quantities. In addition, it is possible to precisely measure the amount of solder in SRS soldering, which is why the process is highly accurate and extremely sustainable. At the same time, the overall process with solder wire is in no way inferior to classic soldering in terms of reproducibility, accuracy and process reliability.