Ways to Improve Soldering Quality of Soldering Iron Sharing
1, in the use of soldering iron for welding, need to ensure that each soldering point welding firmly, 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, it is not welded, sometimes by hand, the lead will be pulled out of the solder joint.
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 soldering iron tip on the solder joints, and then pull out the components after the tin on the solder joints 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.
Correct use of soldering iron
1, choose the right solder, should be used to weld electronic components with a low melting point solder wire.
2, flux, with 25% rosin dissolved in 75% alcohol (weight ratio) as flux.
3, soldering iron before use to tin, the specific method is: the soldering iron will be hot, to be just able to melt the solder, coated with flux, and then evenly coated with solder on the soldering iron head, so that the iron head uniformly ate a layer of tin.
4, the welding method, the pad and component pins with fine sandpaper polished clean, coated with flux. With the soldering iron tip dipped in the appropriate amount of solder, contact the soldering point, to be soldered on the soldering point of all melted and submerged components lead head, the soldering iron head along the component pins gently lifted up to leave the soldering point.
5, the welding time should not be too long, otherwise it is easy to burn the components, if necessary, tweezers can be used to clip the pin to help dissipate heat.
6, the weld should be sinusoidal wave peak shape, the surface should be bright and smooth, no tin spines, tin amount is moderate.
7, after the completion of welding, to use alcohol to the circuit board on the residual flux cleaning, in order to prevent carbonization of the flux affects the normal operation of the circuit.
8, integrated circuits should be the last welding, soldering iron should be reliably grounded, or power off after the use of residual heat welding. Or use a special socket for integrated circuits, weld the socket and then insert the integrated circuit.
9, the soldering iron should be placed on the soldering iron stand.
