What are the skills in the selection of electric soldering iron
There are many types and specifications of electric soldering irons, and the sizes of the workpieces to be welded are different. Therefore, the rational selection of the power and type of electric soldering irons has a direct relationship with improving welding quality and efficiency.
(1) When soldering integrated circuits, transistors and vulnerable components due to heat, 20W internal heating or 25W external heating electric soldering iron should be used.
(2) When welding wires and coaxial cables, use a 45W~75W external heating type electric soldering iron or a 50W internal heating type electric soldering iron first.
(3) When soldering larger components, such as the lead pins of the line output transformer, the lead pins of the large electrolytic capacitor, and the grounding pads of the metal chassis, etc., an electric soldering iron with a power of more than 100W should be used.
It is better to use an adjustable constant temperature soldering iron for the electric soldering iron; when the soldering iron is not used, keep a certain amount of tin on the tip of the soldering iron, and do not clean the tip of the soldering iron on a sponge and store it on a soldering iron stand; Quantitative water to keep the sponge moist throughout the day; when you pick up the soldering iron and start using it, you need to clean the tip of the soldering iron, but you don’t need to take the tip of the soldering iron to the sponge to clean it during use, just put the tin on the tip of the soldering iron Put it in a tin-collecting cardboard box, so that the temperature of the soldering iron tip will not drop rapidly. If there is still difficulty in extracting tin from the IC, add some tin to it (because the tin wire contains flux), and you can easily extract more The tin is down; the temperature of the soldering iron is between 340 and 380 degrees, which is normal. If some sensitive components can only accept the soldering temperature of 240 to 280 degrees; Use rosin or tin wire to solve it; after using it every day, clean it first, add enough tin, and then cut off the power immediately.
