1. The soldering iron's tip shape can be modified to fit the product's assembly density and the workpiece's surface requirements.
2. The soldering iron's tip temperature should be compatible with the solder's melting point, which is often 30 to 80 degrees Celsius higher (excluding the temperature that drops when the soldering iron tip contacts the soldering point).
3. The electric soldering iron's heat capacity should be appropriate, and the soldering iron tip's temperature recovery time should be adjusted to the needs of the surface to be welded.
The term "temperature recovery time" refers to the amount of time needed for the soldering iron tip to heat back up to its maximum temperature following a drop in temperature brought on by heat loss during the welding cycle. It has to do with the soldering iron's heat capacity, power, tip form, and length, among other things.
picking an electric soldering iron according to the power principle
1. Consider utilizing a 20W internal heating or 25W external heating soldering iron when soldering integrated circuits, transistors, and other heat-sensitive components.
2. Consider utilizing a 50W internal heating type or a 45-75W external heating type electric soldering iron when welding thicker wires and coaxial cables.
3. A soldering iron with an electric motor that has a power rating of greater than 100W should be used when fusing bigger components, such as metal chassis grounding pads.
Summarize:
The larger the soldering iron tip, the larger the heat capacity. When continuous welding, the larger the soldering iron tip is, the less the temperature drop will be.
The large soldering iron tip has a high heat capacity, and a lower temperature can be used during soldering, the soldering iron tip is not easy to oxidize, and the service life of the soldering iron tip can be extended.
A soldering iron tip with a contact area between the soldering iron tip and the solder joint, a large contact area can produce effective heat transfer, and the size of the soldering iron tip does not affect adjacent components as a standard. Selecting a geometry that provides sufficient contact with the solder joint can improve soldering efficiency.
There are various shapes of soldering iron tips. The main points of selection are: always maintain a certain amount of solder, quickly and effectively melt the solder on the joint, without false soldering, tinning, hanging tin, no burr in the solder joint, and no scalding of the board and components.
