Welding types of small micro switches

1. The manual welding of small micro switches has the advantage of accurately grasping the welding of each component, but the disadvantage is that it is too time-consuming and laborious.

2. The wave soldering of the pins has the advantages of low price, saving time and effort. Disadvantages: As the current components become smaller and PCBs become denser, the possibility of bridging and short-circuiting between solder joints has also increased.

3. Reflow soldering of the patch. The advantage of this process is that the temperature is easy to control, oxidation can be avoided during the soldering process, and the manufacturing cost is easier to control. The disadvantage of a small micro switch is that the solder sag will also occur during the soldering heating process. This situation occurs in both preheating and main heating. When the preheating temperature is in the range of tens to 100, it is used as one of the components in the solder. The solvent will reduce the viscosity and flow out. If the flow out tends to be strong, it will simultaneously squeeze the solder particles out of the gold-containing particles outside the welding zone, and if they cannot return to the welding zone during melting, it will also form retention Solder balls.