Power heating for about 3 minutes, can melt the solder can work. Soldering iron can not be burned empty, you can work continuously.
1, ordinary iron continuous burning, will lead to iron head oxidation, affecting the service life.
2, continuous burning, will find that the iron heating parts of the copper has been burned red, so it will affect the life of the iron.
3, continuous work, such as has been in the welding, so it is not empty burning, long time work will not damage the iron.
4, constant temperature soldering iron can always be energised, because the temperature will not be too high.
1, the soldering iron is divided into two types of external heat and internal heat:
(1) externally heated soldering iron by the iron head, iron core, shell, wooden handle, power lead, plug and other parts. As the iron head is installed in the iron core inside, so it is called the external heat type soldering iron. Soldering iron core is the key component of the soldering iron, it is the electric wire parallel winding in a hollow porcelain tube composition, the middle of the mica sheet insulation, and lead to two wires and 220V AC power supply connection. There are many specifications of externally heated soldering iron, commonly used 25W, 45W, 75W, 100W, etc. The higher the power the higher the temperature of the soldering iron head [1].
(2) The endothermic soldering iron consists of a handle, a connecting rod, a spring clip, a soldering iron core, and a soldering iron head. Since the iron core is installed inside the iron head, it generates heat quickly and has a high heat utilisation rate, therefore, it is called an endothermic soldering iron. The common specifications of endothermic soldering iron are 20W and 50W. Due to its high thermal efficiency, 20W endothermic soldering iron is equivalent to about 40W exothermic soldering iron. The back end of the endothermic soldering iron is hollow, for socketed on the connecting rod, and fixed with a spring clip, when you need to replace the head of the soldering iron, you must first exit the spring clip, and at the same time, use pliers to hold the head of the soldering iron front, and slowly pull it out, and remember not to exert too much force, so as not to damage the connecting rod.
2, mobile phone maintenance, often to replace the components on the circuit board, the need to use the soldering iron, and it is also very high requirements. This is because the mobile phone components using the surface mount process, small component size, integration is very high, the printed circuit is fine, the pad is small. If the soldering iron is not selected properly, in the welding process is very easy to cause man-made faults, such as welding, short-circuit or even welded circuit boards, so as far as possible to choose some of the high-grade soldering iron, such as thermostatic temperature control anti-static soldering iron. In addition, some large devices such as shield welding, to use high-power soldering iron, so also want to prepare a common 60W above the thick head of the soldering iron.
