Pretreatment of a New Constant-temperature Electric Soldering Iron Before Use
Before using a new constant temperature soldering iron, a layer of solder should be coated on the tip of the iron before it can be used normally. After using the constant temperature soldering iron for a period of time, a layer of oxide will be formed on the blade surface and surrounding area of the soldering iron, which makes it difficult to "eat solder". At this time, the oxide layer can be filed off and the solder can be re coated.
2, Holding method of constant temperature soldering iron:
a. Reverse grip method: It is to hold the handle of a constant temperature electric soldering iron in the palm with five fingers. This method is suitable for high-power constant temperature soldering iron, which can be used to weld workpieces with large heat dissipation.
b. Positive grip method: It is to hold the handle of a constant temperature electric soldering iron with four fingers except for the thumb, and press the thumb in the direction of the soldering iron. This method also uses a relatively large and curved soldering iron tip.
c. Pen holding technique: Hold a constant temperature soldering iron like holding a fountain pen, suitable for low-power soldering iron, soldering small workpieces
3, Welding steps:
During the welding process, the tools should be neatly arranged and the constant temperature soldering iron should be held firmly and aligned. It is best to use tubular solder wire with rosin for general joint welding. You need to hold the handle of the constant temperature electric soldering iron in one hand and the soldering wire in the other hand.
1. One method is to quickly bring the heating and soldering iron tip into contact with the cored wire, then touch the soldering point area, use melted solder to assist in the initial heat conduction from the soldering iron to the workpiece, and then move the soldering iron tip away from the surface to be soldered.
2. One method is to place the soldering iron tip in contact with the pins/pads, and place the solder wire between the soldering iron tip and the pins to form a thermal bridge; Then quickly move the tin wire to the opposite side of the solder joint area.
However, in the process of production, there are usually damages to the PCB or components caused by the use of inappropriate temperature, excessive pressure, prolonged retention time, or a combination of the three.
