Introduction to the use of electrician electric soldering iron welding components
1. For the newly purchased electric soldering iron, use a thin steel file to punch out the copper end face of the copper head (for large-capacity copper heads, including the two oblique sides of the end), and then heat the copper head end with electricity. Go deep into the flux (the flux generally includes rosin, rosin alcohol solution and solder paste), and when it is heated to melt tin, press the copper head on the tin block and push and pull it back and forth, or press the solder wire on the end of the copper head to make the copper The end of the head is evenly coated with a layer of tin.
After this process, the copper head can "hold" the tin during welding.
2. Use an electrician's knife or emery cloth to remove the oxide layer at the end of the connecting wire or the part to be welded to expose the internal metal. For thin wires, avoid breaking the wires due to excessive force.
3. Apply a layer of flux evenly on the place to be welded. Rosin flux is suitable for welding all electronic devices and small-diameter wire ends; rosin alcohol solution is suitable for welding small-diameter wire ends and small-capacity components in the field of strong electricity; welding The paste is suitable for welding of large diameter wire ends and welding of large cross-section conductor surfaces or joints.
4. When soldering, dip the tip of the soldering iron with some solder and lightly press it on the part to be welded, so that the tin can slowly flow into the gap of the part to be welded. The solder wire can also be placed against the contact between the copper head end and the part to be welded, so that it can melt and flow into the welding part. The dwell time of the welding head depends on the size of the weldment.
In order to prevent damage to soldered transistors and other components due to overheating, tools such as tweezers can be used to dissipate heat above the soldered part.
When the solder is evenly melted at the welding place and covers the predetermined welding surface, the soldering iron should be lifted.
In order to prevent the solder joint from appearing "little tail" or sticking to nearby solder joints after lifting, the amount of tin should be appropriate when soldering, and the soldering iron should be moved out quickly or sideways.
