The electric soldering iron can be welded after pre welding treatment
(1) Hold an electric soldering iron in your right hand. Use pointed nose pliers or tweezers with the left hand to grip components or wires. Before welding, the electric soldering iron should be fully preheated. Tin should be eaten on the edge of the soldering iron, that is, a certain amount of solder should be added.
(2) Place the tip of the soldering iron tightly against the solder joint. The electric soldering iron is at an angle of approximately 60 ℃ with the horizontal plane. To facilitate the flow of melted tin from the soldering iron tip to the solder joint. The duration of the soldering iron tip staying at the solder joint should be controlled within 2-3 seconds.
(3) Lift off the soldering iron tip. The left hand still holds the component without moving. Wait for the tin at the solder joint to cool and solidify before releasing the left hand.
(4) Rotate the leads with tweezers to ensure they are not loose, then use a pair of pliers to cut off excess leads.
Welding quality - When welding, ensure that each welding point is firmly welded and has good contact. To ensure welding quality, its typical characteristics are bright tin dots, smooth and without burrs, and moderate tin content. The fusion of tin and the soldered object should be firm, and there should be no false soldering or false soldering.
Virtual soldering refers to a situation where only a small amount of solder is stuck at the solder joint, resulting in poor contact and intermittent disconnection.
Fake soldering refers to a situation where it appears to be soldered on the surface but is not actually soldered on. Sometimes, with just one hand pull, the lead can be pulled out of the solder joint.
When soldering circuit boards, it is important to control the time well. If it is too long, the circuit board will be burnt or cause the copper foil to fall off.
When disassembling components from the circuit board, the soldering iron tip can be attached to the solder joint, and after the tin on the solder joint melts, the component can be pulled out.
How to disassemble and replace components - In fact, disassembling and replacing components is incredibly simple. It is easy to do this with a solder absorber, which can remove all the solder from the pins of the components. Here is a small trick: most circuit boards nowadays have fine workmanship, and solder is rarely used, making it difficult to melt. So, we can add some solder to the pins and use the solder absorber to make it much easier. Another method is to directly use an electric soldering iron to melt off the solder, as mentioned earlier. However, this poses a significant risk, as one must be careful not to completely melt off the solder joints and avoid burning out the components if they come into contact for too long. The common method is to use tweezers to clamp the component and pull it out during heating. When the temperature reaches, the component will be pulled out, but remember not to use too much force, otherwise the pins will break in the solder and it will be troublesome. Of course, for safety reasons, combining the two methods is the best option, as sometimes due to the small size of the component socket, it is difficult to completely absorb the solder. At this time, removing the solder absorber will stick, so it can be heated and removed with an electric soldering iron.
