Working principle of automatic soldering machine

The working principle of the automatic soldering machine is to heat and melt the solid welding wire through the automatic heating of the soldering iron. At the same time, the function of flux is used to make it flow between the welded metals, and solder joints will be formed after cooling. This process is completed by the soldering robot itself. We just need to manipulate the machine. When the solder is a tin-lead alloy and the soldering surface is copper, the solder will wet the soldering surface first. With the appearance of wetting, the solder gradually diffuses to the copper metal, and an adhesion layer is formed on the contact surface of the solder and the copper metal to make the two firmly bonded. It can be considered that automatic welding is achieved by combining the three physical and chemical processes of wetting, diffusion, and metallurgy. Next, let's take a look at the working principle of the soldering equipment. Here are some answers.

Here is the content list:

l Wetting principle

l Principle of Diffusion

l Principles of Metallurgical Bonding

Wetting principle

The wetting process of the soldering robot means that the solder wire has melted and flowed around the gap between the bumps and crystals on the surface of the base metal with the help of capillary force, forming an adhesion layer, so that the atoms of the solder and the base metal are close to each other to achieve atomic gravitational energy's effective distance. The surface of the parent metal must be clean and free of oxides or contaminants.

Principle of Diffusion

With the progress of the soldering equipment, the interdiffusion phenomenon between the solder and the metal atoms of the parent material begins to occur. Usually, atoms vibrate in the lattice, once the temperature rises. The activity of the atoms is enhanced so that the atoms in the molten solder and the parent material cross the contact surface and enter each other's lattice. The moving speed and the number of atoms determine the temperature and time of heating. This can be seen during the welding process, which is the phenomenon that the tin wire melts and flows out.

Principles of Metallurgical Bonding

Due to the diffusion of solder and base material, the soldering robot forms an intermediate layer of metal compound between the two metals. To obtain a good solder joint, a metal compound must be formed between the parent material to be welded and the solder, so that the parent material can achieve a solid metallurgical bonding state. So it can be said that we only have a deep understanding of these principles before we can use an soldering device to do a good job of welding. After all, the automatic soldering robot is also developed by imitating the principle of manual welding.

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