First, the welding principles

Soldering electronic components currently used mainly welding technology. Welding technology, the use of solder alloy of tin, at a certain temperature, melt welding, metal and tin atoms attract each other, the combination between the diffusion layer, penetration. The appearance of platinum and copper versions are smooth parts, they actually have a lot of tiny surface melt flow, the gap soldering solder bump surface diffusion, capillary suction through the formation and soldering, composition and printing plate tightly together , and has good electrical conductivity.

Soldering conditions: Soldering surface should be clean, grease, affect the welding, the metal can be tin solder wetting weldability, brass surface oxide film material, and can help welding flux, soldering surface, followed after the invasion, there must be appropriate temperature, the Welding Electrode material has a certain degree of mobility, to achieve this goal, but the soldering temperature is too high, it is not easy to shape, the welding quality of the oxide film.

Second, hand tools, or welding

The main tools are hand-welding or. There are many types or hydrothermal, induction linear, energy storage and tempering of power, 2OW type of bridge, 15W ..., primarily to determine the 300W variety of welding according to size. In 2OW general welding or undesirable transmission components, integrated circuits and sophisticated welding or energy storage components can be used when welding welding large a ~ 300W power can be WaiReShi or. Low-power or iron between 300-400 degrees Celsius, the head temperature.

Iron copper head used. Welding temperatures for the oxidation protection is not rust, often by electroplating process, the iron head is also the head of iron alloy materials used in some anti-oxidant. In the formal new iron before soldering tin processing. Method with spinning iron gloss paper, and then immersed in clean water, people on board solder rosin (eg, iron grinding repetition of canned every face if using a very long time, iron head has occurred, with a small file to the surface oxide layer of light, light copper and iron in the display after the new method when using only, you can head into the core of iron or different shades of the method of temperature regulation of the iron from the iron core head length, head of iron temperature, the higher the temperature is relatively low. You can also change the conditions of use to adjust the shape and size of the temperature of the tip, the higher the temperature of iron, rough, relative to the lower tip temperature.

You can select the appropriate element type according to the welding head shape of the iron. At the top of the first type, slope iron oval cone, chisel-shaped and so on. Can use a small cone-shaped solder joints, welded joints can be large cylindrical or reduced.

And a can or inhalation, direct heating or increased absorption body. Components in a circuit, should be removed or the.

Third, the welding materials: and the flux

Main ingredient solder. Soldering of electronic components, in fact, a solder alloy, a different proportion of tin lead solder melting temperature is different, usually 180 ° ~ 230 dollars. Most suitable for hand-welded steel pipe welding line, the line is, sandwiching a good rosin and catalyst, convenient to use exceptions. Tubular solder wire is 0.5 to 1.5 0.8,1.0, ... a variety of specifications can be relaxed.

Flow and flow, is a welding process can be heated metal surface cleaning and protection materials. Prone to air on the metal surface oxide film, oxide film to prevent penetration welding, the weld metal. Proper use of flux to remove oxide film, Copper Welding Electrode quality and more reliable, more smooth, round solder surface.

Magnetic flocculants, inorganic organic series and three series is rosin series, inorganic materials, but the most active metals are corrosive, electronic components, shall not be used for welding. Organic acid flux (such as plastic), but also a moderate positive B resistance. The most widely used is the rosin flux. Will melt into the alcohol (1) the formation of the rosin "water", when the solder joints with a dip in the resin can achieve good soldering results rosin help. Excessive dosage, or more membrane rosin soldering lost, to help clean up the weld after welding. Rosin flux in welding hard metal parts, can increase by about 4% hydrochloric acid alcohol two or three rubber adhesive (6%). As the market flux, must understand the composition and function of components, and corrosion before use. Do not blindly use, resulting in corrosion of components in its back.