Soldering with solder paste manufacturers can perform mechanized operations and complete a large number of soldering operations in a short period of time. For example, our common use of SMT process, wave soldering process and hand dip soldering process all use solder for soldering. The difference between several soldering processes is the use of different soldering materials. For example, the common SMT process uses solder paste for soldering, and the wave soldering and hand dip soldering processes use solder bars for soldering. Because the welding process is different and the materials are different, the operating points that need to be paid attention to are different. The SMT solder paste soldering process is aimed at soldering non-perforated circuit boards, wave soldering and hand dip soldering processes, and can solder perforated circuit boards. In the actual use process, the above two processes can be used together, that is, some electronic components use the non-perforated design to use the SMT solder paste printing process for soldering, and the other parts use the perforated design, use the wave furnace and Hand dip furnace for welding perforated parts.
2, the characteristics of soldering using solder
The most commonly used solder materials are basically composed of metal tin and other alloys. For example, solder paste with a ratio of 6337 commonly used by lead solder paste manufacturers will become eutectic solder paste. The melting point of this solder paste is 183 degrees Celsius is quite low in the whole solder alloy. Using metal tin and other alloys to draw wire-shaped solder, we call it solder wire. Many lead-free solder paste manufacturers will hollow out the middle of the solder wire and pour flux. The composition of the flux is generally composed of rosin and flux. During the welding process, it can assist the welding process. Wet the surface to be soldered and increase the fluidity of the entire solder.
3. Welding temperature
In the process of soldering with lead-free solder paste, it is very important to set the appropriate soldering temperature. In the solder paste soldering process, the soldering temperature is generally set to the melting point of the solder paste and then rises by about 50 degrees. Soldering iron is used for welding. According to the size of the two metal contact surfaces to be welded with the welding position, the size of the soldering iron tip, the type of solder used and the type of solder used, the above setting temperature should be increased to about 100 degrees to perform well. welding, has a good welding effect.