The choice of soldering iron
In actual operation, the selection of the soldering iron is very important. If the power of the soldering iron is too small, the solder will not be fully melted, the surface temperature of the soldered components is not enough, the solder cannot be fully infiltrated, and it is easy to cause virtual soldering, sandy solder joints, or spherical soldering. The same point, the same, the power of the selected electric soldering iron is too large, the rosin used for soldering will vaporize immediately and cannot form a protective film to isolate the air on the soldering surface, so that the soldering surface and solder will be oxidized immediately after being heated, and the solder cannot be fully infiltrated, and it is easy to cause voids. Soldering, because the temperature of the solder joint is too high, the solder is not easy to solidify, and it is easy to form sand-like solder joints after vibration, or the solder will be lost, which will cause virtual soldering, and may also short-circuit other solder joints. At the same time, the temperature is too high. , the copper skin of the copper foil board falls off, and the soldering iron head of the high-power electric soldering iron is generally large, and the electric soldering iron with low power is generally small. Therefore, we can use the electric soldering iron from the following
Choose from the following aspects:
A: Choose from the size of the solder joint. Generally, the smaller the solder joint, the lower the power of the selected electric soldering iron. The larger the solder joint, the greater the power of the soldering iron.
B: Choose from the size of the component to be welded. Generally, the larger the volume of the element, the thicker the pin, the larger the pad, and the larger the solder joint.
C: Choose from the heat absorption of the components. Some components have more metal components, so their heat conduction and heat dissipation characteristics are better. At this time, a high-power electric soldering iron should be used for welding.
D: Choose from the welding area, the larger the welding area, the better the heat dissipation characteristics, so use a more powerful electric soldering iron.
E: Choose from the density of solder joints, the greater the solder density, the smaller the power of the soldering iron must be. Control the soldering time. Choosing an anti-oxidation soldering iron tip can make the soldering smoother. Smaller solder joints should use sharper soldering iron tips.
