In the soldering tin industry, when welding components and other electronic products with
solder wire, certain poor welding will occur due to improper operation or other reasons. The technical terms are introduced to everyone, so that everyone can understand the cause and the corresponding solution:
The terminology of poor solder wire welding is as follows:
Tin leakage - refers to the fact that the copper points on the electronic components and the PCB board do not stick to tin during soldering. This may be due to the uneven filling of the solder wire when the flux is poured into it, which causes the flux to rise when the solder wire melts. Less than the role of flux. It may also be that the soldering iron tip is corroded by the additives, causing the soldering iron tip to be heated unevenly, resulting in poor soldering.
Sharpening - means that the surface of the solder point is uneven and the head is pointed. It may be that the activity of the additive of the solder wire is not strong, which affects the wettability and expansion of the solder wire and affects the poor welding. There is another It is because the flux of the solder wire is too acidic to corrode the tip of the soldering iron and cause the tin point to sharpen.
Coarse tin - refers to the rough and not smooth surface of the tin spot after soldering. The reason for this is that there are too many impurities in the solder, and the indicators containing other metals do not meet the production standards.
Solder wire welding
Tin hole - refers to a small hole on the surface of the solder point after soldering. It may be that the humidity of the PCB board is too high during the production process, and the temperature of the solder wire is too high during the welding process.
Bridging - means that two adjacent tin points are connected together after soldering. Check whether the PCB circuit design is qualified, and the flux activity of the solder wire is not strong.
Active Solder Wire
The solution to the poor welding of solder wire:
If you want to solve the problem, you must first understand what caused it. From the above introduction, it is nothing more than the quality of PCB, solder wire, solder flux, etc. When the solder wire is defective, you can judge which part the problem comes from by comparing it with the above. aspect can be easily resolved.
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