Principles and advantages of laser rust removal cleaning machines

Laser cleanling machine can be used to clean the rust layer on the metal surface, handheld cleaning, automatic cleaning can be, depending on the specific needs.

At present, more rust removal is used is sandblasting cleaning. Traditional cleaning processes such as sandblasting cleaning, although high efficiency, but dusty, poor working environment.

But more dust, poor operating environment, the laser descaling machine and traditional descaling compared to what are the advantages?

With mechanical friction cleaning, chemical corrosion cleaning, liquid and solid impact cleaning, high-frequency ultrasonic cleaning and other traditional cleaning methods, compared with laser cleaning has obvious advantages.

1, is a “green” cleaning methods, do not need to use any chemicals and cleaning fluids, cleaning down the waste is basically a solid powder, small size, easy to store, can be recycled, can easily solve the problem of environmental pollution caused by chemical cleaning;

2, the traditional cleaning methods are often contact cleaning, cleaning the surface of the object has a mechanical force, damage to the surface of the object or cleaning medium attached to the surface of the object being cleaned, can not be removed, resulting in secondary pollution, laser cleaning of non-abrasive and non-contact so that these problems are solved;

3, the laser can be transmitted through the fiber optic transmission, and robots and robots to match, convenient to achieve long-distance operation, can clean the traditional method is not easy to reach the parts, which in some dangerous places to use can ensure the safety of personnel; 4, laser cleaning can remove various types of pollutants on the surface of all kinds of materials to achieve the degree of cleanliness of conventional cleaning can not be achieved. And also can not damage the surface of the material in the case of selective cleaning of the material surface pollutants;

5, laser cleaning is highly efficient and saves time;

6, the purchase of laser cleaning system, although the initial one-time investment is higher, but the cleaning system can be used for long-term stability, low operating costs.

Traditional cleaning industry has a variety of cleaning methods, mostly the use of chemicals and mechanical methods for cleaning. In China’s environmental protection regulations are becoming more and more stringent, people’s awareness of environmental protection and safety is increasing today, industrial production cleaning can be used in the chemical species will become less and less. How to find a cleaner, and non-invasive cleaning method is a problem we have to consider. Laser cleaning is considered to be the most reliable and effective solution because of its cleaning characteristics such as non-abrasive, non-contact, non-thermal effect and applicability to objects made of various materials. At the same time, laser cleaning can solve problems that cannot be solved by conventional cleaning methods.

The process of pulsed Nd:YAG laser cleaning depends on the characteristics of the light pulses generated by the laser and is based on a photophysical reaction caused by the interaction between the high-intensity beam, the short-pulsed laser light and the contaminated layer. The physical principle can be summarized as follows:

a) The beam emitted by the laser is absorbed by the contaminated layer on the surface to be treated.

b) The absorption of the large energy creates a rapidly expanding plasma (highly ionized unstable gas), which generates a shock wave.

c) The shock wave causes the contaminants to fragment and be removed.

d) The width of the light pulse must be short enough to avoid the heat buildup that destroys the treated surface.

e) Experiments have shown that plasma is generated on metal surfaces when there are oxides on the surface.

The plasma is only generated at energy densities above a threshold, which depends on the contaminated or oxidized layer being removed. This threshold effect is important for effective cleaning while keeping the substrate material safe. There is also a second threshold for the appearance of plasma. If the energy density exceeds this threshold, the substrate material is destroyed. For effective cleaning with safety of the substrate material, the laser parameters must be adjusted to the situation so that the energy density of the light pulse is strictly between the two thresholds.

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