Experience and skills in preventing poor soldering of electric soldering irons
1. Choose appropriate soldering wire, and it is recommended to use low melting spot welding wire for welding electronic components.
2. Flux, dissolve 25% rosin in 75% alcohol by weight as the flux.
3. The electric soldering iron shall be coated with tin before use. Method: heat the electric soldering iron. When the soldering tin can be melted just now, apply the flux, and then evenly apply the soldering tin on the soldering iron head, so that the soldering iron head can eat a layer of tin evenly.
4. Welding method: Grind the solder pads and component pins clean with fine sandpaper and apply soldering flux. Dip an appropriate amount of solder with a soldering iron tip, touch the solder joint, and wait for all the solder on the solder joint to melt and immerse the component lead head. Gently lift the soldering iron tip up along the component pin to leave the solder joint.
5. The welding time should not be too long, otherwise it is easy to burn the components. Forceps can be used to clamp the pins to help dissipate heat.
6. The solder joint should have a sinusoidal peak shape, and the surface should be bright and smooth, with Wuxi burrs and moderate tin content.
7. After welding, clean the residual soldering flux on the circuit board with alcohol to prevent the carbonized flux from affecting the normal operation of the circuit.
8. Finally, solder the integrated circuit to ensure reliable grounding of the soldering iron, or use residual heat for welding after power outage. You can also use a dedicated socket for integrated circuits. After soldering the socket, plug the integrated circuit in.
9. The electric soldering iron needs to be placed on the soldering iron holder when not in use.
The above are the methods used to prevent poor soldering of electric soldering irons, hoping to be helpful to everyone.
