Time： 2019-05-27 10:52:41
Advantages of selective wave soldering
1. Good reliability of welding
The welding effect of the traditional wave soldering has not been very good, and it is easy to have defects such as poor tin penetration or bridging; while the selective wave soldering is used for welding, the parameters of each solder joint can be set to the flux amount of the flux. The welding parameters of the welding time and the welding wave soldering height are optimized, and the soldering of the required soldering pads is selectively sprayed, and the reliability of the welding is very improved.
2. PCB board cleanliness is high
Selective wave soldering only selectively sprays the flux for the points that need to be soldered, so the cleanliness of the board is greatly improved, and the amount of ionic contamination is greatly reduced. It fundamentally solves the problem of cleaning after traditional wave soldering.
3. Reduce the cost of welding
Selective wave soldering can be understood as a low-speed placement machine, setting up a program, which is where to solder. Intelligent welding can reduce the amount of flux and nitrogen used, reduce the generation of dross, and eliminate the need to make fixtures, greatly reducing the cost of welding.
4. Reduce the thermal shock of the board
In the lead-free soldering process, the soldering temperature can be as high as 260, and the soldering temperature rise and cool down process can easily cause thermal shock to the PCB board, resulting in soldering defects. Selective wave soldering is only for specific points of welding, no matter whether it is in the spot welding and drag welding, it will not cause thermal shock to the whole circuit board, thus reducing the defects caused by thermal shock.
Disadvantages of selective wave soldering
1. The price of the equipment is high
The selective wave soldering is as intelligent as the placement machine, which means that the natural price will be higher than the traditional wave soldering price. The structure of selective wave soldering is complicated, and the manufacturing cost is high. However, there are few manufacturers that can produce selective wave soldering in China, and the price of selective wave soldering remains high.
2. Low production efficiency
Selective wave soldering enables point-to-point soldering and one-to-one flux soldering of each solder joint, so it is less efficient than conventional wave soldering. Although a number of nozzles have been added to improve the effect, there is still a large gap compared with the production of conventional wave soldering.
3. High maintenance costs
The residual flux in the production will remain in the wave soldering conveyor system, and the generated tin slag needs to be removed regularly, which brings more complicated equipment maintenance and maintenance work to the user. The selective wave soldering machine is precise and delicate, and the maintenance cost is often high.
Selective wave soldering is mainly used for welding automotive electronics or aerospace products. These are common wave soldering and difficult to solder. Often these difficult products are of high value. Therefore, although the price of selective wave soldering equipment is high, Have a good prospect in the high-end market.
The above is the relevant content of the advantages and disadvantages of selective soldering, and the advantages of selective wave soldering are summarized. The advantages of selective wave soldering are: the solder joint is almost perfect, the labor cost and the repair cost are lower than the manual soldering, and the skill is reduced. The labor requirements of the labor force and labor costs, the solder joint consistency is very good, and the production efficiency is also high. Disadvantages: As selective soldering becomes more popular, their cost is now within acceptable limits, but even so, the cost of selective soldering is still much more expensive than wave soldering in general; compared to wave soldering, its The speed is relatively slow, but it is still much faster than manual soldering in a production environment.