Introduction and Analysis of Soldering Technology

Have you heard of soft soldering? This is a novelty that came out recently. In the technical field of this project, we Kehua have always been at the forefront. In fact, the principle is very simple. Share it with everyone. Soldering Basic introduction Soldering is a type of connection method that uses solder with a melting point of not more than 450 ° C and is heated to a soldering temperature that is lower than the melting point of the base metal and higher than the melting point of the solder. The brazing filler metal spreads on the closely fitting joining surfaces by capillary action or on the workpiece surface by wetting. Soldering filler metals are solders with a liquidus temperature (melting point) not exceeding 450°C. Solder filler metals are usually alloys that do not contain iron. A temperature of 450°C is the demarcation point between brazing and soldering. Most of the process parameters and influencing factors involved in brazing also apply to soldering. In fact, industry terms such as soldering, brazing or silver soldering are also used to distinguish soldering from brazing. Soldering Classification 1. Dip Soldering Dip Soldering (DS) is a soldering method that uses a metal bath of molten solder to heat it. Solder can be kept molten by any heat source. Solder dipping equipment is usually automated and programmed to control the pre-cleaning, fluxing, preheating and dipping processes. 2. Furnace soldering Furnace soldering (FS) is a soldering method in which the workpiece to be welded is placed in a furnace for heating. When soldering in a furnace, the weldment must be assembled and held in place. Solder must be preloaded into the joint. The furnace may be heated using any suitable fuel or energy source. 3. Induction soldering Induction soldering (IS) is a soldering method that uses the resistance heat generated by the induced current in the workpiece for heating, which is similar to induction soldering. 4. Infrared soldering Infrared soldering (IFS) is a soldering method that uses infrared radiant heat for heating, which is similar to infrared soldering. 5. Soldering iron soldering Soldering iron soldering (INS) is a soldering method that uses a soldering iron to heat. Soldering irons have a part called a heating head that heats and transfers heat to the solder, which is made of copper. The heating head of the soldering iron can be heated in different ways, for example, the electric soldering iron is heated by the internal resistance coil; there are also flame heating and furnace heating. Soldering torches are also used in the industry, which use resistance heat and whose heater head is a high resistance element. Soldering torches are widely used in electronic component assembly. Soldering iron soldering is generally done manually. 6. Resistance Soldering Resistance soldering (RS) uses the resistance heat generated when an electric current flows through the weldment for welding. This method is slightly different from resistance brazing, which usually requires the use of hand-held tools for welding, which requires the introduction of low voltage and high current to the weldment. This method is commonly used in electrical equipment manufacturing. The figure below shows an example of an application of resistance soldering of lugs to soldered cables. Solder is usually added by hand. This method is also used for brazing industrial copper pipe fittings. Soldering Now you have also learned about our Kehua soldering. If you are a worker in a related industry, you can also study this in your spare time. We welcome a large number of technicians.