Common types of soldering irons, different classification methods of soldering irons
1. Classification method
According to the heating method of electric soldering iron, it is divided into two types: internal heating type and external heating type; according to the function classification of electric soldering iron, it is divided into constant temperature electric soldering iron, anti-static electric soldering iron, tin-absorbing electric soldering iron, etc. Classified according to the power of the electric soldering iron, there are various powers such as 20-300W.
2. Types of soldering irons
(1) Internal heating type electric soldering iron
The soldering iron core of the internal heating electric soldering iron is installed inside the soldering iron head. The soldering iron core is made of nickel-chromium resistance wire wound on a porcelain tube. It has fast heating, high thermal efficiency, cheap price, light weight, small size, fast heating, and low power consumption. low merit.
The efficacy of the 20W internal heating electric soldering iron is equivalent to that of the 40W external heating electric soldering iron. It is suitable for soldering small electronic components and printed circuits, and is widely used in instrument maintenance.
(2) External heating electric soldering iron
The soldering iron tip of the external heating type electric soldering iron is installed in the soldering iron core, and the soldering iron tip is made of copper alloy material with copper as the matrix.
The length of the soldering iron tip of this soldering iron can be adjusted, the shorter the soldering iron tip, the higher the temperature of the soldering iron tip.
The power has a variety of specifications from 25-300W. High-power external heating electric soldering irons are often used for welding iron sheet components.
(3) Constant temperature electric soldering iron
The constant temperature electric soldering iron has a temperature sensor and a controller. The temperature control range of the constant temperature electric soldering iron is 100-400°C. The temperature of the soldering iron tip can be manually changed to stop heating when the temperature of the soldering iron tip reaches the set value, which not only improves the welding quality, but also It can prolong the life of the soldering iron tip.
There are not many types of constant temperature electric soldering irons, and the simple temperature control circuit is installed in the handle of the soldering iron. The one with a more complex structure is called a soldering station, and its soldering iron core uses PTC heating elements. After changing the set temperature, the soldering iron tip can quickly reach the new set temperature.
The soldering iron head can not only adjust and maintain temperature, but also anti-static and anti-inductive electricity, which is more suitable for soldering CMOS devices. Some products have temperature digital display, and the power is mostly 60W.
