Five-step method for correct welding of electric soldering iron

The five steps of proper welding of electric soldering iron are: preparation, heating, adding solder wire, disassembling solder wire and disassembling electric soldering iron.

1. preparation: prepare the workpiece to be welded, heat the soldering iron to the working temperature, keep the welding head clean, eat tin well, hold the soldering iron in one hand and solder wire in the other, and separate the soldering iron and solder wire at both sides of the workpiece to be welded.

2. Heating: The welding head contacts the weldment, and the whole weldment, including the workpiece terminals and pads, should be heated uniformly. Do not apply pressure or drag the soldering iron at will, and the appropriate time is about 1 ~ 2 seconds.

3. Welding wire feeding: When the welding part of the workpiece is heated to the welding temperature, the welding wire is fed into contact with the welding spot of the workpiece to melt and wet the welding spot. The solder should contact the weldment from the reverse side of the soldering iron.

4. Dismantle welding wire: melt it in a proper amount of solder, and quickly disassemble the welding wire after the welding part fully absorbs the solder and forms a thin solder layer.

5. Remove the soldering iron: After removing the solder wire, remove the soldering iron quickly before the flux evaporates, otherwise it will leave a bad solder joint. The vacuumizing direction of electric soldering iron is related to the amount of residual solder, which is generally vacuumizing at 45 degrees to the axial direction.