How to use a soldering iron - welding technology
After completing the pre-welding treatment, we can officially proceed with welding.
1. Welding method
Weld, inspect, cut short
Hold the soldering iron in your right hand, and use needle-nose pliers or tweezers in your left hand to hold components or wires; before welding, the soldering iron should be fully preheated, and tin should be eaten on the blade surface of the soldering iron head, that is, bring a certain amount of solder.
Place the blade surface of the soldering iron tip close to the solder joint. The angle between the soldering iron and the horizontal plane is about 60°C, so that the molten tin can flow from the soldering iron tip to the solder joint. The time the soldering iron tip stays at the solder joint is controlled to 2 to 3 seconds. seconds.
Lift the soldering iron tip and still hold the component with your left hand. Release your left hand after the tin at the solder joint has cooled and solidified.
Use tweezers to turn the lead to make sure it is not loose, and then use offset pliers to cut off the excess lead.
2. Welding quality
When welding, ensure that each solder joint is firmly welded and in good contact, and the welding quality must be ensured.
A good solder joint should be bright, smooth and without burrs, have a moderate amount of tin, and the tin and the object to be soldered should be firmly integrated, and there should be no false soldering or false soldering. Welding is a condition where only a small amount of tin is soldered at the solder joint, resulting in poor contact and occasional on and off.
False welding means that it seems to be welded on the surface, but in fact it is not. Sometimes the lead can be pulled out from the solder joint by hand. These two situations will bring great consequences to the debugging and maintenance of electronic production. Difficulties, both of which can only be avoided through extensive and careful welding practice.
Be sure to control your time when soldering circuit boards. If the circuit board is too long, it will be burned or the copper foil will fall off. When removing the components from the circuit board, you can stick the soldering iron tip on the solder joints. After the tin on the solder joints melts, pull out the components.
Flux (rosin and soldering oil) is the key when 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.
