In the post-welding process or maintenance of electronic and electrical products, solder wire
is the most indispensable connection material. When soldering the solder wire, the temperature should be effectively controlled to ensure that the solder wire has a good welding. effect.
If the solder operator uses a too low temperature during the soldering process, it will affect the smoothness of the solder; if the temperature is too high, it will damage the circuit board or components, resulting in white smoke or white powder on the surface. Welding problems such as gloss. These two phenomena are called cold welding or wrap welding. In order to prevent the above situation from happening, in addition to the careful selection of solder wires, the correct working temperature is also very important:
The following solder manufacturers summarize the appropriate operating temperature in various soldering work for you:
Typical solder wire melting point: 183C - 215C (about 361F - 419F)
Normal operating temperature: 270C - 320C (about 518F - 608F)
Production line operating temperature: 300C-380C (about 572F - 716F)
Soldering working temperature (small solder joint): 315C (about 600F)
Soldering working temperature (large solder joint): 400C (about 752F)
Precautions: Do not use it frequently or continuously when the temperature exceeds 400C (752F); it can only be used for a short time when it is occasionally used in large solder joints or very fast soldering.
Then the key points of operation when soldering the solder wire by hand are also very important:
1. Prepare the work, first prepare the solder wire and soldering iron. Special attention is that the head of the soldering iron must be kept clean before it can be stained with solder (commonly known as eating tin).
2. Touch the soldering iron to the soldering point, pay attention to first keep the soldering iron heating all parts of the soldering piece, such as the leads and pads on the printed board to heat it, and then pay attention to let the flat part (larger part) of the soldering iron tip touch the heat capacity. For large weldments, the side or edge of the soldering iron tip should touch the weldments with smaller heat capacity to keep the weldments heated evenly.
3. When the soldering piece is heated to a temperature that can melt the solder, place the solder wire on the solder joint, and the solder begins to melt and wet the solder joint.
4. When the solder is completely wet, remove the soldering iron. At the same time, rotate it slightly to absorb excess solder. Check the quality of the solder joints and repair the soldering in time; place the soldering iron head on a soldering iron stand when the soldering iron head is withdrawn after soldering, and pay attention to prevent burns.