Introduction to the purchase of soldering iron
Soldering iron is electronic production and electrical maintenance of the necessary tools, the main purpose is to weld components and wires, according to the mechanical structure can be divided into internal and external hot soldering iron, according to the function can be divided into non-tin-absorbing soldering iron and tin-absorbing soldering iron, according to the use of different types of soldering irons is divided into high-power soldering irons and low-power soldering irons.
Selection and purchase of soldering iron
Choosing the right soldering iron will help to greatly improve the efficiency of our soldering iron in the electronic lead-free soldering, but usually, the choice should be based on the actual situation of the object to be soldered, generally focusing on the consideration of the form of heating, the power size, the shape of the iron head and so on.
According to the soldering iron heating form of choice
1, the choice of internal and external heat type: the same wattage, internal heat type soldering iron temperature is higher than the external heat type soldering iron temperature.
2, when the need for low-temperature welding, the application of voltage regulator to control the temperature of the soldering iron, the temperature of the soldering iron and the power supply voltage has a close relationship with the actual use of the power supply voltage is often adjusted down to reduce the temperature of the soldering iron.
3, through the adjustment of the soldering iron head extends the length of the temperature control.
4、Stabilize the temperature of the soldering iron by the following methods: installing a regulated power supply to prevent changes in the power supply network; maintaining a certain volume, length and shape of the soldering iron head; adopting a constant temperature soldering iron; keeping the indoor temperature constant; avoiding the natural wind or electric fan wind.
According to the choice of soldering iron power
1, welding small wattage resistive components, transistors, integrated circuits, printed circuit board pads or plastic wires, it is appropriate to use 30 ~ 45W external heat or 20W endothermic soldering iron. Application of 20W endothermic soldering iron is best.
2, welding general structure of the product welding point, such as wire ring, wire claw, heat sink, grounding pads, etc., it is appropriate to use 75 ~ 100W soldering iron.
3, for large-scale welding points, such as welding metal frame joints, welding piece, etc., it is appropriate to use 100 ~ 200W soldering iron.
