According to statistics, most of the cleaning processes currently used by shipyards are sandblasting and water sandblasting, which can be matched with 4 to 5 spray guns, with an efficiency of 70 to 80 square meters per hour, and the cost is about 5 million yuan, and the working environment is poor, because the water After sandblasting and washing, it is all mud, which is difficult to handle and has an impact on the environment. Therefore, many shipyards are looking for new processes to replace sandblasting.
Laser cleaning does not use consumables, and the operating cost has advantages compared with traditional methods.Laser cleaning is an environmentally friendly cleaning process. The residue after laser cleaning and cleaning is solid, and a dust collection system can handle it. It is quite convenient and the cost is cheaper than water sandblasting.
Advantages of using laser cleaning:
1. Non-contact cleaning, no cleaning medium
Laser cleaning uses a high-energy laser beam to irradiate the surface of the workpiece to be cleaned, and removes contaminants from the surface of the workpiece through selective vaporization, ablation, shock waves, and thermal elasticity. There is no cleaning medium in the cleaning process, which can avoid serious substrate damage (particle cleaning), medium residue (chemical cleaning) and other problems in traditional cleaning, and reduce substrate damage to an acceptable range.
2. Green and environmental protection
The fume and dust produced by laser cleaning can be collected by a dust collector, which is easy to handle, no secondary products are produced, and the impact on the environment is minimized.
3. Diversified operation methods
Laser cleaning can be divided into hand-held and automatic cleaning. Hand-held cleaning is carried out by operators who carry mobile laser cleaning equipment and hold the laser head for cleaning. Automatic cleaning integrates laser cleaning systems with manipulators, crawling robots, AGVs and other equipment to achieve precise and efficient cleaning.
4. Can clean various types of pollutants
Whether the substance to be removed is organic matter, metal, oxide or inorganic non-metal, laser cleaning can remove it. This is an advantage that any other traditional method does not have, making it widely used in the removal of surface dirt, paint, rust, film and other fields.
5. Low operating cost
Laser cleaning technology refers to the use of high-energy and high-frequency laser beams to irradiate the surface of the workpiece, so that the dirt, rust or coating on the surface evaporates or peels off instantly, and effectively removes the surface attachment or surface coating of the cleaning object at high speed, so as to achieve a clean laser. crafting process. Lasers are characterized by high directivity, monochromaticity, high coherence and high brightness. Through the focusing and Q-switching of the lens, the energy can be concentrated into a small spatial and temporal range.
As a world-recognized manufacturing power, China has made great strides on the road of industrialization and made great achievements, but it has also caused serious environmental degradation and industrial pollution. In recent years, my country’s environmental protection regulations have become more and more stringent, resulting in some enterprises being shut down for rectification. The one-size-fits-all environmental storm will have some impact on the economy, and changing the traditional polluting production model is the key. With the advancement of technology, people have gradually explored various technologies that are conducive to environmental protection, and laser cleaning technology is one of them. Laser cleaning technology is a workpiece surface cleaning technology that has been newly applied in the past ten years. It is gradually replacing traditional cleaning processes in many fields with its own advantages and irreplaceability.
Traditional cleaning methods include mechanical cleaning, chemical cleaning and ultrasonic cleaning. Mechanical cleaning uses scraping, rubbing, brushing, sandblasting and other mechanical means to remove surface dirt; wet chemical cleaning uses organic cleaning Spray, shower, soak or high-frequency vibration and other measures to remove surface attachments; ultrasonic cleaning method is to put the treated parts into the cleaning agent, and use the vibration effect generated by ultrasonic waves to remove dirt. At present, these three cleaning methods still dominate the cleaning market in my country, but they all produce pollutants to varying degrees, and their applications are greatly limited under the requirements of environmental protection and high precision.
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Post time: Sep-20-2022
