In the process of using fiber laser metal clean machine for laser cleaning, in order to achieve the best cleaning effect, it is necessary to accurately control a number of key energy parameters of the laser, including the wavelength selection, power density, pulse width and repetition frequency of fiber laser metal clean machine.
The wavelength selection of fiber laser metal clean machine is a very important first step. The absorption characteristics of different wavelengths of lasers on different materials are very different. For example, infrared lasers (such as fiber lasers with a wavelength of 1064nm) perform well when cleaning oil stains and oxides on metal surfaces, because metals have a good absorption capacity of lasers of this wavelength, which can quickly produce photothermal effects and cause pollutants to be heated away. For the cleaning of the surface of some non-metallic materials, it may be necessary to choose an ultraviolet laser (such as a wavelength of 355nm), because some non-metallic materials absorb ultraviolet light more strongly, which is more conducive to photochemical decomposition or other cleaning mechanisms.This is just like different keys open different locks. Fiber laser metal cleaning machine can only open the “door” to clean specific pollutants by using the right wavelength.
The power density of fiber laser metal cleaning machine directly affects the efficiency and effect of cleaning. The power density of the fiber laser metal cleaning machine is too low, and it may not provide enough energy to cause effective physical or chemical changes in pollutants, resulting in insufficient thorough cleaning. For example, when we are cleaning a thicker rust layer, if the power density is not enough, the rust layer cannot be sufficiently heated to melt or vaporize, and it is difficult to remove it from the metal surface. On the contrary, the power density is too high, and it may cause damage to the cleaned base material. For example, when we are cleaning precision electronic components, too high power density may cause the metal layer on the surface of the component to be excessively ablated, affecting the performance of the component. Therefore, our fiber laser metal cleaning machine needs to adjust the power density according to factors such as the material of the cleaning object, the type and thickness of the contaminants, and find the best value that can be effectively cleaned without damaging the substrate.
The pulse width and repetition frequency of fiber laser metal cleaning machine also have an important impact on the cleaning process. The pulse width of the fiber laser metal clean machine determines the distribution of laser energy in time. A laser with a short pulse width can concentrate and release energy in a very short period of time, producing extremely high peak power, which is conducive to the realization of some cleaning mechanisms that require high instantaneous energy release, such as plasma shock wave effect. When cleaning contaminants on the surface of high-hardness ceramics, a laser with a short pulse width can generate a powerful shock wave in an instant to peel off the contaminants. The long pulse width laser can provide relatively continuous energy, which is more suitable for some cleaning tasks that require high energy accumulation. The repetition frequency controls the speed of laser pulse emission. A higher repetition frequency means that more laser pulses act on the surface of the object per unit time, which can improve the efficiency of cleaning, but at the same time it may also lead to excessive accumulation of heat in the base material, resulting in thermal effects. When cleaning large areas of sheet metal, appropriately increasing the repetition frequency can speed up the cleaning speed, but care should be taken to control the heat dissipation to avoid deformation of the sheet due to overheating.
Eagle Laser is a technology company focused on laser equipment. We are engaged in the research and development, manufacturing, sales and service of laser equipment for fiber laser metal clean machine and other products and equipment. If you are interested in our products, you are welcome to call us at any time!