![]() ![]() This is like a kind of scrubbing, which removes all the flux and the residue of the oxide film on it, and forms wetting when the solder joint reaches the wetting temperature.įor hybrid technology assemblies, turbulence waves are generally used in front of the lambda wave. When the circuit board enters the wave crest, the direction of solder flow is opposite to the traveling direction of the board, which can generate eddy currents around the component pins. For perforated components, a single wave is sufficient. After preheating, the circuit board is welded with a single wave (λ wave) or double wave (spoiler wave and λ wave). Among these methods, forced hot air convection is generally considered to be the most effective heat transfer method for wave soldering machines in most processes. The most commonly used wave soldering preheating methods include forced hot air convection, electric heating plate convection, electric heating rod heating, and infrared heating. The wave soldering machine basically uses the heat radiation method for preheating. ![]() In addition, due to the larger heat capacity of double-sided and multi-layer boards, they require a higher preheating temperature than single-sided boards. If these things are not removed, they will boil at the peak of the wave and cause the solder to splash, or generate steam to stay in the solder to form hollow Solder joints or blisters. It can also be used to evaporate all the moisture that may be absorbed or the carrier solvent that dilutes the flux. This process can also reduce the thermal shock generated when the assembly enters the wave crest. The preheating after the flux coating can gradually increase the temperature of the PCB and activate the flux. Since most fluxes must reach and maintain an activation temperature during soldering to ensure complete wetting of the solder joints, the circuit board must pass through a preheating zone before entering the wave trough. The main material is solder bars.Īfter the circuit board enters the wave soldering machine through the conveyor belt, it will pass through a certain form of flux coating device, where the flux is applied to the circuit board by wave, foaming, or spraying. ![]() The high-temperature liquid tin maintains a slope, and a special device makes the liquid tin form a wave-like phenomenon, so it is called "wave soldering". On the page " Wave Soldering VS Reflow Soldering", the meaning of wave soldering has mentioned, Wave soldering is to make the soldering surface of the plug-in board directly contact the high-temperature liquid tin to achieve the purpose of soldering. ![]()
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