Ways to improve the soldering quality of the soldering iron tip
1, in the use of soldering iron for welding, need to ensure that each soldering joint welding firm, good contact, to ensure the quality of welding.
2, good solder joints require bright tin point, round and smooth without burrs, tin amount is moderate. Tin and the soldered material fused firmly. There should be no false soldering and false soldering.
3, pay attention to the prevention of false soldering and false soldering problems: false soldering is only a small amount of tin soldered at the weld, resulting in poor contact, sometimes through and sometimes off. False soldering is that the surface seems to be welded, but in fact not welded, sometimes by hand, the lead will be pulled out of the solder joints.
Only after a large number of serious welding practice, you can avoid these two major problems.
4, when soldering circuit boards, you must control the time. Too long and the circuit board will be burnt or cause the copper foil to fall off. When removing components from the circuit board, you can stick the tip of the soldering iron on the soldering point, and then pull out the components after the tin on the soldering point melts.
5, soldering flux (rosin and soldering oil) is the key, fresh rosin and non-corrosive soldering oil helps to complete high-quality soldering, and can make the surface clean and beautiful, use with more flux.
Features of external hot soldering iron
1, external heat type soldering iron
Soldering iron head, soldering iron core, shell, wooden handle, power supply lead, plug and other parts of the composition, soldering iron head installed in the soldering iron core inside, known as the external heat type soldering iron.
2,Components
Soldering iron core is the key component of the soldering iron, the electric wire parallel winding in a hollow porcelain tube, the middle of the mica sheet insulation, and lead to two wires and 220V AC power supply connection.
3, product specifications
External thermal soldering iron specifications are many, commonly used specifications are 25W, 45W, 75W, 100W, etc., the greater the power of the soldering iron head temperature is higher.
The different power specifications of the iron core, its internal resistance is different. 25W iron resistance value is about 2k Ω, 45W iron resistance value is about 1 k Ω, 75W iron resistance value is about 0.6 k Ω, 100W iron resistance value is about 0.5 k Ω.
4, the use of materials
Soldering iron head made of copper material, its role is to store heat and conduct heat, the temperature must be much higher than the temperature of the soldering.
The temperature of the soldering iron is related to the volume, shape and length of the iron tip. When the volume of the iron head is relatively large, the holding time is longer.
In order to adapt to the requirements of different welding objects, the shape of the iron head has the same, generally conical, chisel-shaped, round bevelled and other shapes.
