Maintain the four major points of welding head

It is necessary to wet the cleaning sponge before welding in welding head, and then squeeze out the remaining water. Only in this way can welding head get better cleaning effect. If non-wet cleaning sponge is used, the welding head will be damaged and tin will not be applied.

During the welding operation, the following welding sequence can make the welding head protected by solder and reduce the oxidation speed.

After welding, adjust the temperature to about 250°c, then clean the welding head and add a new layer of tin for protection. (If non-temperature controlled soldering iron is used, first cut off the power supply, and let the temperature of welding head drop slightly before soldering.

Precautions A. Using low temperature welding and high temperature as far as possible will accelerate the oxidation of welding head and reduce the life of welding head. If the temperature of welding head exceeds 470°c, its oxidation rate is twice that of 380 C. B. Do not apply excessive pressure during welding, otherwise the welding head will be damaged and deformed. As long as the welding head can fully touch the solder joint, the heat can be transferred. Other suitable welding head can also assist in heat transfer. C, insist on welding head cleaning and finishing oxides immediately. If there is black oxide on welding head, welding head may not be tin coated, so it is necessary to finish it immediately. When finishing, first adjust the welding head temperature to about 250°c, then clean the welding head with a cleaning sponge, and then apply tin. Repeat the action until the oxide is sorted out. D, often insist on tin plating in welding head, which can reduce the oxidation time in welding head and make welding head more useful. After application, new solder should be added after the welding head temperature drops slightly, so that the tin plating layer has better anti-oxidation effect. E, choose flux with low activity, flux with high activity or strong corrosivity will accelerate the corrosion of welding head when heated, so choose flux with low corrosivity. Note: Do not use sand paper or hard objects to clean welding head. F, put the welding iron on the welding iron rack without using the welding iron, carefully put the welding iron on the suitable welding iron rack to avoid the welding head being damaged by bumping. G. It is very important to choose the appropriate welding head and the correct scale and shape of welding head. Choosing the appropriate welding head can make the operation more powerful and increase the utilization degree of welding head. Choosing the wrong welding head will affect that the welding iron can not exert higher power, and the welding quality will also be reduced. The size of the welding head is directly related to the heat capacity. The greater the welding head, the greater the heat capacity, and the smaller the welding head, the smaller the heat capacity. When welding in succession, the greater the welding head, the less the temperature drop. In addition, due to the high heat capacity of the welding head, it can be used at a lower temperature during welding, so that the welding head is not easy to oxidize and its life is prolonged.