Analyze for you: laser engraving technology

Laser surface treatment, including laser cladding, laser remelting, laser surface alloying, laser transformation hardening, laser surface amorphization and microcrystallization, laser shock hardening and many other. The common theoretical basis of these technologies is the interaction between laser and matter. Their respective characteristics are mainly the different laser power densities acting on the material. Laser engraving is essentially laser remelting. Analyze for you: laser engraving technology

Today, we will analyze the laser engraving technology for you.

In order to prevent scratching and seizing of cold-rolled sheet during press forming, the final process of rolling is performed with a texturing roll to make the surface have a certain roughness. The conventional method utilizes shot peening technology or electric sparking to form a roll. The surface of the roll is composed of randomly distributed protrusions and dimples, and the dimples are basically connected, and there is basically no plane. This method can basically solve the problem of stamping. Injuries and seizures, but because the pits are connected, the oil storage is not reliable, and the oil at the point where the deep-draft force is large may be squeezed away, which reduces the lubrication effect, and because there is no flat surface, the brightness of the surface painting is not high. . In recent years, it has been demanded that the surface morphology of the steel sheet not only satisfies the conditions for deep drawing, but also satisfies the requirements for the surface brightness of the painted steel sheet. The purpose of the laser engrave technology is to make the roll surface as uniform as possible surface morphology and the appropriate surface roughness, so that the roll has an excellent deep drawability, so that the rolling pieces get a good adhesion of paint and a good surface The bottom of the appearance.

In the laser engraving technique, the pulsed laser light is focused on the surface of the roller, and each pulse generates a rapid melting and condensing process. An engraved dot composed of pits and projections is formed on the surface of the roller. After the laser engraved roll, the surface is composed of regularly arranged engraved points and planes around the engraved points. Using this roll to flatten the cold rolled sheet, often referred to as a laser cut sheet. Laser engraved rolls greatly improve deep drawing performance. At the same time, there are a large number of facets in the laser engraving board. The brightness of the paint and the paint can solve scratching and seizing in the punching process. However, because the pits are connected, the oil storage is not reliable, and the force is applied during deep drawing. Oil on large points may be squeezed away, reducing lubrication, and due to the absence of a flat surface, the brightness of the painted surface is not high. In recent years, it has been demanded that the surface morphology of the steel sheet not only satisfies the conditions for deep drawing, but also satisfies the requirements for the surface brightness of the painted steel sheet. The purpose of the laser engrave technology is to make the roll surface as uniform as possible surface morphology and the appropriate surface roughness, so that the roll has an excellent deep drawability, so that the rolling pieces get a good adhesion of paint and a good surface The bottom of the appearance.

In the laser engraving technique, the pulsed laser light is focused on the surface of the roller, and each pulse generates a rapid melting and condensing process. An engraved dot composed of pits and projections is formed on the surface of the roller. After the laser engraved roll, the surface is composed of regularly arranged engraved points and planes around the engraved points. Using this roll to flatten the cold rolled sheet, often referred to as a laser cut sheet. Laser engraved rolls greatly improve deep drawing performance. At the same time, there are a large number of facets in the laser engraving board. The brightness of the paint and the adhesion of the paint are also significantly improved. The laser engraving technology has received the attention of the world's major industrial countries.

Laser engraving technology was first developed by Belgium's CRM. Steel companies in Germany, Japan and other countries have also developed this technology. Of course, China is no exception. The development of this technology is also relatively rapid.