How to use a soldering iron--soldering technology
After the pre-welding treatment is done, the welding can be officially carried out.
1. Welding method
Weld, inspect, cut short
Hold the electric soldering iron in the right hand, and use the needle-nose pliers or tweezers to hold the components or wires in the left hand; before soldering, the electric soldering iron should be fully preheated, and the tip of the soldering iron should eat tin, that is, bring quantitative solder.
The edge of the soldering iron tip is close to the solder joint, and the electric soldering iron is at an angle of about 60 °C with the horizontal plane, so that the molten tin flows from the soldering iron tip to the solder joint, and the time that the soldering iron tip stays at the solder joint is controlled within 2 to 3 seconds.
Lift the tip of the soldering iron and hold the component with your left hand, and release the left hand after the tin at the solder joint has cooled and solidified.
Use tweezers to turn the leads to confirm that they are not loose, and then use offset pliers to cut off the excess leads.
2. Welding quality
When welding, ensure that each solder joint is firmly welded and has good contact, and the welding quality must be guaranteed.
A good solder joint should be bright, smooth and free of burrs, moderate amount of tin, firm fusion of tin and the object to be soldered, and no false soldering and false soldering. False soldering is that only a small amount of tin is soldered at the solder joint, resulting in poor contact, sometimes on and off.
Fake soldering means that it seems to be soldered on the surface, but it is not actually soldered. Sometimes the lead can be pulled out from the solder joint by hand. These two situations will bring great benefits to the debugging and maintenance of electronic production. difficulties, both of which can only be avoided by extensive and serious welding practice.
Be sure to control the time when soldering the circuit board. If the circuit board is too long, it will be scorched or the copper foil will fall off. When removing the components from the circuit board, you can stick the tip of the soldering iron on the solder joints. After the tin on the solder joints is melted, pull out the components.
Flux (rosin and soldering oil) is the key when soldering. Fresh rosin and non-corrosive soldering oil can help you complete the soldering well, and can make the surface smooth and beautiful. You can use more flux when you use it.
