How to use a soldering iron - preparation
1. Before using a new soldering iron, polish the tip with fine sandpaper, heat it with electricity, dip it in rosin and touch the blade of the tip to the soldering wire so that the tip is evenly coated with tin, which facilitates soldering and soldering. Prevent oxidation of the soldering iron tip surface. If the old soldering iron tip is severely oxidized and turns black, you can use a steel foil to remove the surface oxide to expose the metallic luster and then re-tin plating it before use.
The soldering iron requires a 220V AC power supply, so pay special attention to safety when using it. The following points should be carefully done:
It is best to use a three-pole plug for the soldering iron plug, and the shell must be properly grounded.
Before use, carefully check whether the power plug and power cord are damaged, and check whether the soldering iron tip is loose.
When using the soldering iron, do not hit it hard and prevent it from falling. If there is too much solder on the soldering iron head, wipe it off with a cloth. Do not throw it around to prevent scalding others.
During the welding process, the soldering iron should not be left lying around. When not welding, it should be placed on the soldering iron stand. Note that the power cord cannot be placed on the soldering iron head to prevent the insulation layer from being burned and causing an accident.
After use, the power supply should be cut off immediately, unplug the power plug and cool down before putting the soldering iron back into the tool box.
2. Solder and flux
When welding, solder and flux are also needed.
Solder: When welding electronic components, solder wire with a rosin core is generally used. This solder wire has a lower melting point and contains rosin flux, making it extremely easy to use.
Flux: Commonly used flux is rosin or rosin water (dissolve rosin in alcohol). Using flux can help remove oxides on the metal surface, which is beneficial to welding and protects the soldering iron tip. Solder paste can also be used when welding larger components or wires, but it is corrosive and the residue should be removed in time after welding.
3. Auxiliary tools
To facilitate welding operations, needle-nose pliers, offset pliers, tweezers, and knives are often used as auxiliary tools. You should learn to use these tools correctly. Needle nose pliers, offset pliers, tweezers, knife.
How to use a soldering iron - pre-soldering treatment
Before welding, the component pins or the welding parts of the circuit board should be pre-soldered:
Remove oxide layer from welding parts
A knife can be made from a broken saw blade to scrape off the oxide layer on the surface of the metal lead to expose the metal luster of the pin.
