Operation points of electric soldering iron
Weldment surface treatment
Various electronic parts and wires encountered in electronic production generally require surface cleaning before welding, as shown in the figure, to remove rust, oil, dust and other impurities on the welding surface that affect the welding quality. Simple and easy methods such as mechanical scraping and grinding are commonly used in manual operation.
Soldering iron tip cleaning and "eating tin"
When soldering, the soldering iron tip is in a high temperature state for a long time, and it is exposed to heat-decomposed substances such as flux, and the surface is easily oxidized to form a layer of black impurities. These impurities almost form a heat insulation layer and cause the soldering iron tip to lose its heating effect. Therefore, it is necessary to rub the impurities on the soldering iron frame at any time. It is also a common method to wipe the tip of the soldering iron with a damp cloth or a damp sponge at any time. After cleaning, the tip of the soldering iron must be able to be wetted by solder, that is, the tip must be covered with a layer of solder, commonly known as "eating tin". Useful when.
pre-soldered
Pre-soldering is to pre-wet the welding parts of the component leads or wires to be soldered with solder, also known as tinning. It is almost indispensable for manual soldering iron welding, especially for debugging and maintenance in product development work.
Five-step training method for electric soldering iron
The five-step method is summed up by the predecessors. It has been proved to be effective in practice as a manual soldering training method. Practice soldering iron welding and improve the technical level from the five-step method.
① Prepare for welding. Prepare solder wire and soldering iron. special at this time
It is emphasized that the tip of the soldering iron should be kept clean, that is, it can be stained with solder, commonly known as eating tin.
② Heating the weldment. Touch the soldering iron to the soldering point, taking care to keep
The soldering iron heats all parts of the weldment, such as the leads and pads on the printed board, to heat them up.
③ Melt the solder. When the weldment is heated to a temperature that melts the solder, the wire is placed on the solder joint, and the solder begins to melt and wet the solder joint.
④Remove the solder. When a certain amount of solder is melted, the solder
Wire removed.
⑤Remove the soldering iron. Remove the solder when the solder has completely wetted the solder joint
Iron Note that the direction to remove the soldering iron should be the general direction, and the speed of removal should be decisive and fast.
