Soldering Iron Selection Guide
Selection of soldering iron type
1. Endothermic soldering iron. Endothermic soldering iron structure is simple, high thermal efficiency, lightweight and flexible, when the first choice. By the connecting rod, handle, spring clip, iron core, iron head (also known as copper head). Soldering iron core installed in the inside of the iron head. Soldering iron core using nickel-chromium resistance wire wound on the porcelain tube made of general 20W soldering iron resistance of 2.4kΩ or so, 35W soldering iron resistance of 1.4kΩ or so.
2. External heat type soldering iron. This kind of soldering iron manufacturing process is complex, low efficiency, high price, generally by the iron head, iron core, shell, handle, plug and other parts. Soldering iron head installed in the iron core, with good thermal conductivity of copper as the substrate of copper alloy material made.
The length of the iron head can be adjusted (the shorter the iron head, the higher the temperature of the iron head). Commonly used in practice are chisel, pointed cone, round surface shape, round, pointed cone and semi-circular groove shape and other different shapes to adapt to the needs of different welding surface.
3. Thermostatic soldering iron. In the soldering iron head into the magnet-type temperature controller to control the energized time, is the thermostatic soldering iron. In the welding temperature should not be too high, the welding time should not be too long components, should be used thermostatic soldering iron, but it is expensive. Automatic thermostatic soldering iron despite more parts, maintenance is difficult, the price is high, but it can guarantee the quality of the soldering point, especially when doing circuit experiments and repairing a large number of printed circuit boards, with a very good effect. The electric soldering iron used in the production line, take the automatic voltage regulation method of constant temperature, the cost may be lower. Some areas of the utility power instability, soldering iron often burned not dipped in tin, or the temperature is not enough, weld does not move, in order to ensure the quality of brazing, there is only the use of automatic thermostatic series of soldering irons, or configure the voltage regulator system. Only the temperature is high, series of buck resistor is also OK.
4. Suction tin soldering iron. Suction tin soldering iron is a piston type tin sucker and soldering iron dissolved in one of the desoldering tools, it has easy to use, flexible, wide range of application and other characteristics. The disadvantage is that each time only one soldering point for desoldering.
5. Gas soldering iron. Is a kind of liquefied gas, methane and other combustible gas combustion heating iron iron. In the inconvenience of power supply or can not supply alternating current occasions, you can choose to use. Due to the risk of explosion, this paper does not discuss the purchase of such iron.
