Brief introduction of soldering iron core
The core of the electric soldering iron is the key component of the electric soldering iron, which consists of heating wires wound in parallel on a hollow porcelain tube, insulated by mica sheets in the middle, and two wires are led out. 220V？ AC power connection.
Second, the advantages of soldering iron core
Simple structure, small volume, fast heating speed, uniform heating, fast heat dissipation, no naked flame during heating, safe use, complete isolation of heating circuit from air and no oxidation phenomenon.
Third, the classification of soldering iron core
At present, there are two main types of soldering iron cores: one is resistance wire winding, and the other is resistance paste burning.
Four, the use of iron core matters
When soldering the circuit board, be sure to control the time. If it is too long, it will burn the circuit board or the copper foil will fall off. When removing components from the circuit board, the welding head can be attached to the solder joint, and the components can be pulled out after the tin on the solder joint melts. The temperature of soldering iron is related to the size, shape and length of soldering head. When the volume of the welding head is relatively large, the service time will be relatively long.
Five, the use of soldering iron core five-step method
1, prepare for welding.
2. Heat the weldment.
3. Melt the solder.
4. Remove the solder.
5. Remove the soldering iron.
Six, the difference between internal heating electric soldering iron core and external heating electric soldering iron core.
a； Definition of external hot electric soldering iron and internal hot electric soldering iron
The definition of internal heating electric soldering iron is that the heating element is inside the solder copper head, or the welding head is outside the heating element, so that the heat can be transferred from the inside to the welding head. It has the advantages of fast heating speed, high thermal efficiency, small volume, light weight, low power consumption and flexible use. Suitable for welding small parts. However, due to the high temperature in welding head, it is easy to be oxidized and blackened, and the welding head core is easy to break, and the power is small, only 20W, 35W, 50W and other specifications.
Definition of external heating electric soldering iron
External heating refers to heating outside, which is named because the heating resistance is outside the welding head. It is suitable for welding both large parts and small parts. There are 25W, 30W, 50W, 75W, 100W, 150W, 300W and so on.
B: The difference between an external heating electric soldering iron and an internal heating electric soldering iron.
First of all, the structure of welding head is very different.
The welding head with internal heating is hollow because the heating core is built-in.
The externally heated welding head is solid, and its heating core is outside.
You can see clearly from the structural diagram of the electric soldering iron. The external heating core is separated from the welding head with a heating tube in the middle.
The welding head of the external heating electric soldering iron is inside the heating core, which is also called ordinary electric soldering iron. Welding ordinary products, there is no requirement for temperature. Use an externally heated electric soldering iron. Because the heating resistance wire is outside the welding head, most of the heat is radiated to the external space, so the heating efficiency is low and the heating speed is slow. Generally, preheating is 6 ~ 7 minutes before welding. Its large volume makes it difficult to weld small devices. But it has the advantages of long service life and high power on the welding head.
Internal heating electric soldering iron, the welding head used in the internal heating electric soldering iron is a hollow cylinder, and the heating element is covered by the welding head, so that its heat is not easy to dissipate into the air, so the heat utilization efficiency is high, the preheating time is short, and the power can generally meet the requirements without too much. Generally, the internal heating power is below 50W, and the internal heating electric soldering iron is about 20W~30W. There is a single handle and a welding table. 936 welding table is a typical internal heating electric soldering iron, but it is also constant temperature. Now they are all lead-free soldering irons (lead-free soldering stations), which are better than the first two.
Above, we have introduced the relevant text and picture information about welding head Core in detail, namely, the brief introduction of welding head Core, the five-step usage of welding head Core, the advantages, classification and precautions of welding head Core. Through introduction, we know that soldering iron cores are divided into two types: internal heating type and external heating type. According to different usage scenarios and brand performance differences, there are also differences in quotation and so on. Everyone needs to consider comprehensively according to their own needs and budget when actually purchasing.
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