What are the soldering methods of electric soldering iron?
1. Check whether the soldering iron is well grounded before using it.
2. Before soldering, pay attention to whether the power of the soldering iron matches the soldering point.
3. Wash the soldering iron tip with a sponge and coat it with tin.
4. Clean the components to be soldered, plate them with tin, and then solder them. The temperature during soldering should not be too high and the time should not be too long.
5. Pay attention to the permeability of the solder joints, the spacing between points, and the coordination of rosin and solder paste.
6. After welding, you must check whether the welded parts are missing, missing, wrong, or short-circuited.
soldering iron
1. Types and powers of commonly used soldering irons
Commonly used soldering irons are divided into two types: internal heating type and external heating type. The tip of an internally heated soldering iron is outside the heating wire. This type of soldering iron heats up quickly and is lightweight. The tip of the externally heated soldering iron is inserted into the heating wire. Although it heats slowly, it is relatively strong.
The soldering iron is heated directly with 220V AC power. The power cord and the casing should be insulated, and the resistance between the power cord and the casing should be greater than 200M ohms.
Electronic enthusiasts usually use 30W, 35W, 40W, 45W, and 50W soldering irons. A more powerful soldering iron has a smaller heating wire resistance. Ohm's law derives the formula: R=U/I=U/I*U/U=U^2/P
2. Precautions when using soldering iron
(1) The newly purchased soldering iron must be dipped in a layer of tin before use (power the soldering iron, and then use a tin bar close to the tip when the soldering iron is heated to a certain level). If the soldering iron has been used for a long time, the tip of the soldering iron must be File it brightly, then turn on electricity to heat it up, and dip the soldering iron tip in a little rosin. When the rosin smokes, apply tin, so that the surface of the soldering iron tip is first plated with a layer of tin.
(2) The temperature of the electric soldering iron reaches over 250 degrees Celsius after it is powered on. It should be placed on the soldering iron stand when not in use. However, when not used for a long time, the power supply should be cut off to prevent the soldering iron tip from being "burned" (oxidized) by the high temperature. It is necessary to prevent the soldering iron from burning other components, especially the power cord. If the insulation layer is burned by the soldering iron without paying attention, it may easily cause a safety accident.
(3) Do not hit the soldering iron hard to avoid breaking the heating wire or lead inside the soldering iron and causing malfunction.
(4) After the soldering iron has been used for a period of time, there may be tin scale left on the head of the soldering iron. We can lightly wipe it with a damp cloth while the soldering iron is heated. If there are pits or oxide blocks, use a fine-grained file to repair them or replace the soldering iron head directly.
