Welding components with soldering iron is a basic assembly process, which plays a key role in ensuring the quality of electronic products. The following are the welding points of some components. 1. The best welding is rosin, rosin oil or acid-free flux. Acid flux can't be used, otherwise it will corrode the weld. 2. Before welding, scrape the place to be welded with a knife to make it appear metallic luster, coat it with flux, and then coat it with a layer of solder. 3. When welding, the soldering iron should have enough heat to ensure the welding quality and prevent virtual welding and long-term desoldering. 4. Don't leave the soldering iron at the welding place for too long. 5. After the soldering iron leaves the welding position, the welded parts can't move immediately, otherwise, because the solder hasn't solidified, the parts are easy to detach. 6. It is best to wire the connected components first, and then tin them. 7. When welding devices that are afraid of high temperature, such as transistors, it is best to clamp the leads of transistors with flat pliers or tweezers, and grasp the time when welding. 8. It is best to use thinner low-temperature welding wire for the welding of semiconductor components, and the welding time should be short.

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