Structure and principle of automatic soldering machine

 

1. Structure and working principle.

 

1. Automatic soldering machine control system: automatic soldering machine control system is an important part of high-speed welding, spot welding and inclined welding of various workpieces. Use array copy, parameter copy; The washing step can be inserted in the middle of the program, and steps such as jumping and low pressure can be set.

 

2. Automatic tin control system: inter-machine communication, program copy function, save a lot of manual programming time; Single program correction, integral correction function, fast origin correction, workpiece deviation and AB automatic positioning function, greatly facilitate the production of the program, confirmation and fake welding repair; Insert and delete function, easy to quickly modify and make; Dynamic display of running coordinates and visible parameter units. These functions are necessary to support the normal operation of the automatic soldering machine.

 

3. Automatic thermostat control system: manual digital temperature setting at a glance, automatic thermostat control. Highly reliable metal anti-static design makes welding sensitive components safer. High flexibility, adjustable space, temperature, tin speed and tin output.

 

4. With the acceleration of the replacement of electronic components, it is not difficult to find that the development of electronics is developing in the direction of miniaturization and miniaturization. More and more traditional manual welding methods can not meet the requirements of production technology. In order to improve production efficiency and improve product quality, automatic soldering machine will be selected under the premise of ability.

 

Second, the working principle

 

1. The automatic soldering machine heats and melts the solid solder wire through an automatically heated soldering iron. At the same time, the flux flows into the metal to be welded and forms a solid and reliable solder joint after cooling. This process is all done by the machine itself, we only need to manually control the machine. When the solder is tin-lead alloy and the welding surface is copper, the solder first wets the welding surface. With the occurrence of Wetting, the solder gradually diffuses to the metal copper, forming an adhesive layer on the contact surface between the solder and the metal copper, making the two sides firmly bonded. Therefore, it can be said that automatic welding is completed by three physical and chemical processes: wetting, diffusion and metallurgy.

 

2. Wetting principle: The wetting process refers to the flow of molten solder (tin wire) around the surface of the base material with the help of capillary force along the fine roughness and crystallization gap on the surface of the base material, thus forming a bonding layer on the surface of the base material to be welded. The distance at which the atoms of the solder and the base metal come close to each other and atomic gravity acts. Environmental conditions leading to wetting: The surface of the base material to be welded must be clean and free of oxides or contaminants.

 

3. Diffusion principle: With the progress of wetting, solder and base metal atoms begin to diffuse each other. Normally, once the temperature is raised, the atoms are in a state of thermal vibration in the lattice. The increased atomic activity causes the atoms in the molten solder to cross the contact surface with the base metal and enter each other's lattice. The speed and number of atoms are determined by the heating temperature and time. This can be clearly seen in the welding process, that is, the phenomenon of the flow out of the tin wire after melting.

 

4. The principle of metallurgical bonding: due to the mutual diffusion of solder and base metal, an intermediate layer - metal compound is formed between the two metals. In order to obtain a good solder joint, a metal compound must be formed between the substrate to be welded and the solder. So that the base metal to achieve a strong metallurgical bonding state. This is like steelmaking, where multiple metals are melted and joined together. Therefore, it can be said that only with a deep understanding of these principles can you use an automatic soldering machine for good welding. After all, the automatic soldering machine is also developed from the imitation of manual welding principles.