Introduction to Electric Soldering Iron Welding Technology
After completing the pre welding treatment, welding can be officially carried out.
1. Welding method.
Welding inspection and cutting short
(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 soldering iron should be fully preheated. The tip of the soldering iron should be coated with solder, that is, a certain amount of solder should be added.
(2) Place the tip of the soldering iron tightly against the solder joint. The soldering iron forms an angle of approximately 60 ℃ with the horizontal surface. So that the melted tin can flow from the soldering iron tip to the solder joint. The soldering iron tip should stay at the solder joint for 2-3 seconds.
(3) Lift up the soldering iron tip. The left hand still holds the component still. Wait for the tin at the solder joint to cool and solidify before releasing the left hand.
(4) Rotate the lead wire with tweezers to confirm that it is not loose, and then use side cutters to cut off excess lead wire.
2. Welding quality
When welding, it is necessary to ensure that each welding point is firmly welded and has good contact. To ensure the quality of welding.
A good solder joint should have a bright, smooth, and burr free solder spot, with a moderate amount of solder. Tin and the object being welded are firmly fused. There should be no virtual welding or false welding.
Virtual soldering refers to the situation where only a small amount of solder is attached to the solder joint, resulting in poor contact and intermittent continuity. Fake soldering refers to the situation where the surface appears to be soldered, but in reality it is not soldered. Sometimes, by pulling it out with your hand, the lead can be pulled out from the solder joint. These two situations will bring great difficulties to the debugging and maintenance of electronic production. Only through extensive and careful welding practice can these two situations be avoided.
When soldering circuit boards, it is important to control the timing. If it is too long, the circuit board will be burnt or cause the copper foil to peel 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.
Flux (rosin and soldering oil) is crucial during welding. Fresh rosin and non corrosive soldering oil can help you complete the welding well and make the surface smooth and beautiful. You can use more flux when using it
