Soldering iron is an indispensable tool for electronic production and electrical maintenance. Its main purpose is to weld components and wires. According to the mechanical structure, it can be divided into internal heating type electric iron and external heating type electric iron. According to the function, it can be divided into non-suction soldering iron and suction. Tin-type soldering irons are divided into high-power soldering irons and low-power soldering irons depending on the application.
These two situations will bring great difficulties to the debugging and overhaul of electronic production. These two situations can only be avoided after a large number of serious welding practices.
When soldering a circuit board, be sure to control the time. Too long, the board will be burnt or cause the copper foil to fall off. When removing components from the board, the soldering iron tip can be attached to the solder joints. After the tin on the solder joints is melted, the components are pulled out. The temperature of the soldering iron has a certain relationship with the size, shape and length of the soldering iron. When the size of the tip is relatively large, the hold time is longer. In addition, in order to meet the requirements of different welds, the shape of the tip is different, and the common ones are tapered, chiseled, round beveled, and the like.
Use the multimeter ohmmeter to measure whether there is an open circuit short circuit at both ends of the plug, and then use Rx1000 or Rx10000 file to measure the resistance between the plug and the outer casing. If the pointer is not moving or the resistance is greater than 2-3MΩ, it can be safely used without leakage. The iron core of the internal heating type soldering iron is made of a relatively thin nickel-chromium electric resistance wire wound on a porcelain tube, and its electric resistance is about 2.5 kΩ (20 W), and the temperature of the soldering iron is generally about 350 ° C. Since the internal heating type soldering iron has the characteristics of quick heating, light weight, low power consumption, small volume, and high thermal efficiency, it has been applied in general.
After the soldering iron is turned on, it is not hot or too hot. Check whether the power supply voltage is lower than AC210V (normal voltage should be AC220V). If the voltage is too low, the heat may be insufficient and the soldering is difficult. The soldering iron tip is oxidized or the root end of the soldering iron tip and the inner wall of the outer tube are oxidized. In the three-phase four-wire power supply system, the neutral line is grounded and equipotential to the earth. If the bubble is illuminated when tested with a test pencil, it indicates that the neutral line is charged (the potential difference between the neutral line and the ground). The zero line is open, the neutral line grounding resistance is increased, or the grounding down line is open and the phase line is grounded.
The use of soldering iron should pay attention to the soldering iron should be grounded, it is best to use a pointed soldering iron, temperature (260 ° C -300 ° C), you can add some soldering materials (rosin, flux), the surface of the chip should choose the right solder Wire (0.6-0.8), if necessary, you can use a constant temperature soldering iron. Wear an anti-static wristband during the welding process. Pay attention to the direction of the core, which should be consistent with the silk screen. The iron core has different power specifications and its internal resistance is different. The resistance of the 25W soldering iron is about 2kΩ, the resistance of the 45W soldering iron is about 1kΩ, the resistance of the 75W soldering iron is about 0.6kΩ, and the resistance of the 100W soldering iron is about 0.5kΩ. The soldering iron tip is made of copper material. Its function is to store heat and conduct heat. Its temperature must be much higher than the temperature to be soldered.
First, the temperature is determined by the actual use, to solder a tin point for 4 seconds is most suitable. Usually observe the tip of the iron, when it is purple, the temperature is set too high.
Second, the general in-line electronic material, the actual temperature of the soldering iron head is set to (330 ~ 370 degrees); surface mount material (SMC) material, the actual temperature of the soldering iron head is set to (300 ~ 320 degrees)
Third, special materials, need to set the temperature of the soldering iron. Microphones, buzzers, etc. should use silver-containing tin wire, the temperature is generally between 270 degrees and 290 degrees.
Fourth, the welding of the large component feet, the temperature should not exceed 380 degrees, but can increase the power of the soldering iron.
Precautions for the use of soldering iron1. Try to use low temperature soldering
High temperatures will accelerate the oxidation of the tip and reduce the life of the tip. If the tip temperature exceeds 470 ° C, its oxidation rate is twice that of 380 ° C.
2. Do not apply too much pressure
When welding, do not apply too much pressure, otherwise the tip will be damaged. As long as the tip can fully contact the solder joint, heat can be transferred. Also choosing the right tip can help with heat transfer.
3. Always keep the soldering iron on the tin
This can reduce the chance of oxidation of the tip and make the tip more durable. After use, the new solder should be added after the temperature of the soldering iron is slightly lowered, so that the tin plating layer has better anti-oxidation effect.
4. Keep the tip clean and instantly clean the oxide
If there is black oxide on the tip, the tip may not be tinned and must be cleaned immediately. When cleaning, first adjust the temperature of the soldering iron to about 250 ° C, then clean the soldering iron with a cleaning sponge, and then apply tin. Repeat the action until the oxide is cleaned.
5. Use low activity flux
Fluxes that are highly reactive or corrosive will accelerate the corrosion of the soldering iron when heated, so low-corrosion fluxes should be used.
Note: Do not use sandpaper or hard objects to clean the tip.
f. Place the soldering iron on the soldering iron frame
When soldering iron is not required, the soldering iron should be carefully placed on a suitable soldering iron frame to avoid damage to the soldering iron tip.
USB data cable
5V 2A charger head one
Wooden hollow core tube
Insulating sleeve
2.5MM copper wire takes 2CM long
0.1MM electric heating wire takes 10CM length
AB mixed glue
Method / step1. Put 2CM 2.5MM copper wire on the insulation tube, and seal the two ends of the insulation tube with copper wire.
2. Use a 10 CM long 0.1 MM heating wire to wrap around the middle and fix it at both ends.
3. Put on the insulation tube and cross-wrap.
4. Insert the wooden tube into the USB data cable and connect it.
5. Dip with AB mix.
6. Welding effect
Unlike disposable e-cigarette, vape pod system is designed with vape device and disposable vape pod, which is detachable. Usually latest pod system includes one vape battery device and 3 pods(2ml), magnetic connector between pod and device, 1s pop in.
The processing technology for pod system has been greatly upgraded, the shell adopts oxidation and radium carving technology. The drip tip is made of PCTG food grade material. Moreover the e-cigarette pod system is designed under principle of ergonomics, so that you can feel comfortable, exact fitting when hold and inhale
The e-cigarette is available in dark gray, purple, blue, pink colors, with black electronic cigarette holder, environmentally friendly and full of youthful.
350mAh battery, charged by typc-c, 2ml e juice prefilled, enjoy happy vape all day long.
The M2 e-cigarette kit adopts triple oil leakage prevention design: top and bottom have multiple silica gel, used for rapid absorption of condensate; The middle layer uses the third generation of high density impervious ceramic coil, so that prevent oil leaking from atomizer
Multiple flavors available, apple ice, orange ice, tobacco, grape...... more than 13 fruits choice; 3.0 ceramic atomizing technology provides not only big vapor, but also smooth and delicate taste.
Vape Pod,Vape Pen Disposable,Vape Flavour,Vape Kits,Liquid Vape
Shenzhen Axiswell Technology Co., Ltd , https://www.medhealthycare.com