Precautions for manual soldering operations
⑴ Keep the tip of the soldering iron clean and maintained
When soldering, the tip of the soldering iron is in a high temperature state for a long time, and it is easy to oxidize and get a layer of black impurities. Therefore, pay attention to wipe the tip of the soldering iron with a wet sponge at any time, and add tin to the tip of the soldering iron when it has not been used for a long time to prevent the tip of the soldering iron from oxidizing and making it impossible to stick tin.
(2) Accelerate heat transfer by increasing the contact area
When heating, the parts of the weldment that need to be infiltrated by solder should be heated evenly, instead of only heating a part of the weldment, let alone using the soldering iron to increase the pressure on the weldment.
⑶ Pay attention to the evacuation of the soldering iron
The evacuation of the soldering iron should be timely, and the angle and direction of evacuation are related to the formation of solder joints.
⑸ Do not move until the solder is solidified
Do not move or vibrate the weldment, otherwise it is very easy to cause loose structure of solder joints or false welding.
⑹ The amount of solder should be moderate
Tin wire, already filled with flux made of rosin and activator inside.
⑺ The amount of flux should be moderate
Excessive use of rosin flux will inevitably need to wipe off excess flux after welding, and prolong the heating time and reduce work efficiency. When the heating time is insufficient, it is easy to form the defect of "slag inclusion".
⑻ Do not use the tip of the soldering iron as a tool for delivering solder (with soldering)
Some people are accustomed to using the tip of a soldering iron as a tool for delivering solder, which results in oxidation of the solder. Because the temperature of the tip of the soldering iron is generally above 300°C, the flux in the solder wire is easy to decompose and fail at high temperature, and the solder is also in a low-quality state of overheating.
