In the trend of electronic manufacturing industry is basically inseparable from soldering iron welding, not manual welding or automatic welding
First of all, the soldering iron head should be hung tin, so that the method of hanging tin in the future is very simple, before the power, first clean the end face of the soldering iron head with sandpaper or a knife, after the power, when the temperature of the soldering iron head rises to a certain degree, the solder is placed on the soldering iron head to melt, so that the end face of the soldering iron head hangs a layer of tin. After hanging the tin, the soldering iron head can be used for welding at any time. Solder with tin.
2, the newly bought electric iron can take a knife to hang the iron head (because of the oxide layer), and then plug in, plug in carefully hot hand temperature is very high;
3, when the temperature of the soldering iron comes up, the soldering iron head on the rosin, the point on the solder;
4, first need to weld on the line point rosin, solder on the point;
5, and then weld on the components that need to be welded, pay attention to speed, otherwise the temperature is too high easy to burn components;
6, when the electric iron is not in use, the head of the iron is covered with solder (to prevent the iron from drying
Step 1: Prepare for welding with the welding wire in the left hand and the soldering iron in the right hand, enter the welding ready state. The soldering iron tip is required to be clean, free of oxides such as welding slag, and coated with a layer of solder on the surface.
Step 2: Heat the soldering iron head at the joint of the two welds, heat the entire weldment, the time is about 1 to 2 seconds. For welding components on the printed board, care should be taken to make the soldering iron tip contact the two welded objects at the same time. Wires and terminals, component leads and pads should be uniformly heated at the same time
Step 3: When the welding surface of the wire solder is heated to a certain temperature, the solder wire contacts the solder from the opposite side of the soldering iron. Note: Do not send the solder wire to the soldering iron head!
Step 4: Remove the welding wire When the welding wire has melted a certain amount, immediately remove the welding wire 45° to the left.
Step 5: After removing the soldering parts of the solder wetted pad and solder, remove the soldering iron in the upper right 45° direction to finish welding. From the beginning of step 3 to the end of step 5, the time is also about 1 to 2s.
1. Keep the soldering iron head clean and maintain when welding, the soldering iron head is in a high temperature state for a long time, which is easy to be oxidized and stained with a layer of black impurities. Therefore, pay attention to wipe the iron head with a wet sponge at any time, and add tin to the iron head when it is not used for a long time to prevent oxidation of the iron head, resulting in inability to stick tin
2, do not move before the solidification of the solder, do not make the solder move or subject to vibration, otherwise it is easy to cause the solder joint structure loose or virtual welding.