Solder wire with different kinds of flux is different, the flux is increased solder wire in welding process of auxiliary heat conduction, removal of the oxide, reduce the surface tension of the material to be welded, removed welding material surface oil, increase the welding area. Solder wire quality is a certain length and diameter of tin alloy wire in the electronic device in welding can be used in conjunction with an electric iron. However, solder wire in the welding process will be a lot of bad welding problems, analysis of the reasons for the welding is as follows:
The main welding surface is contaminated (oxidation), so that the solder wire can not be fully adhered to the uniform coverage;
1 tin wire, PCB preheating enough, leading to the surface of the wet flux;
2 conveyor track vibration, mechanical bearings or motor rotation is not balanced;
3 exhaust equipment or the electric fan is too strong, but also through the PCB rail export tin wet;
4 preheat or solder temperature is insufficient;
5 and the proportion of the improper selection of the flux activity.