What is the structure of an internal heating soldering iron? How to use an internal heating soldering iron?
Internal heating electric soldering iron
The iron head of the internal heating electric soldering iron is inserted into the soldering iron core, and depending on the power, it can be used after being powered on for 2-5 minutes. The maximum temperature of the soldering iron tip can reach around 350 ℃. There are various commonly used internal heating soldering irons, such as 20W, 25W, 30W, 50W, etc. Electronic device repair usually requires a 20-30 watt internal heating soldering iron.
Structure of internal heating soldering iron
Internal heating electric soldering iron consists of a shell, handle, soldering iron tip, soldering iron core, power cord, etc. The handle is made of heat-resistant rubberwood and will not be damaged by the heat of the soldering iron. The soldering iron tip is made of copper, and its quality is closely related to the welding quality. The soldering iron core is made by winding a very thin nickel chromium resistance wire on a ceramic tube. Under normal conditions, its resistance value varies from 1 to 3k Ω depending on the power. The outer shell of the soldering iron core is generally made of seamless steel pipe, so it will not deform due to overheating. Some fast heating soldering irons are made of brass tubes, and due to their fast heat transfer, they should not be used with electricity for a long time, otherwise the handle will be damaged. The terminal post is made of copper screws and used to secure the soldering iron core and power cord.
(Appearance and Structure of Internal Heating Electric Soldering Iron)
The use of internal heating electric soldering iron
Before using a new soldering iron, use a multimeter to measure the resistance at both ends of the power cord. If the resistance is zero, it indicates that there is an internal wire collision and should be disassembled. Disconnect the wire and plug it back into the power supply; If there is no resistance, it is mostly due to a broken soldering iron core or lead wire; If the resistance is around 3k Ω, plug in the power supply, and after a few minutes of power on, pick up the soldering iron and dip it in the rosin. Normally, it should smoke and make a "squeaking" sound. Then dip the soldering iron again and let the tin be fully dipped on the soldering iron before soldering.
