Soldering Skills and Operation Methods with Electric Soldering Iron
1. Choose appropriate soldering materials, such as low melting spot welding tin wires used for soldering electronic components.
2. Flux: Dissolve 25% rosin in 75% alcohol (by weight) as the flux.
3. Before using the soldering iron, it should be tinned. The specific method is to heat the soldering iron until it can just melt the solder, apply the flux, and then evenly apply the solder to the tip of the soldering iron, so that the tip of the soldering iron is evenly coated with a layer of tin.
4. Welding method: Clean the solder pads and pins of the components 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 submerge the component lead. Then, gently lift the soldering iron tip up along the pins of the component and leave the solder joint.
5. The welding time should not be too long, otherwise it is easy to burn the components. If necessary, tweezers can be used to clamp the pins to help dissipate heat.
6. The solder joint should have a sine wave peak shape, with a bright and smooth surface, no burrs, and a moderate amount of tin.
After welding is completed, the residual flux on the circuit board should be cleaned with alcohol to prevent the carbonized flux from affecting the normal operation of the circuit.
8. Integrated circuits should be soldered last, and the soldering iron should be reliably grounded, or waste heat should be used for soldering after power failure. Alternatively, use a dedicated socket for integrated circuits, solder the socket, and then plug in the integrated circuit.
9. The soldering iron should be placed on the soldering iron holder.
