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2022 New trends_Laser hybrid cleaning technology
Time:2022-06-05
Views:679
Laser hybrid cleaning technology
CW laser combined pulse laser beam
With the rapid development of laser cleaning technology, new directions and trends are emerging in the field. Among them, laser composite cleaning technology is one of the most potential and promising directions: it can double or triple the cleaning efficiency on the basis of the same price.
What is laser hybrid cleaning?
As we all know, in the high-end cleaning market, the efficiency of laser cleaning will be lower than that of traditional cleaning methods at the same cost. For example, in the paint removal work of ship overhaul, the area of ship side paint is very large, some are cleaned with chemical cleaning, some are cleaned with high-pressure water, and many shipyards will propose to use laser cleaning, but the laser cleaning is limited by power, and the cleaning area of thick paint per unit time cannot meet the shipyard‘s requirements in terms of efficiency.
Of course, technically speaking, simply improving efficiency can be achieved by simply adding power; However, the cost of this method is also increased dozens or even hundreds of times after the power is increased, and there is no cost performance ratio. This means that efficient ship laser cleaning can only stay in theory, but can not enter the industrial application.
At present, the power of foreign pure pulse laser can reach 5000W, but it is not imported into China due to technical blockade. The maximum power of domestic pulse laser is only 1000W, and 2000W pure pulse laser is still in the commissioning stage, which is unstable when used.
The composite laser cleaning technology is to realize the efficiency of 1000W pure pulse laser cleaning machine by 4000W continuous +500w pulse, and the efficiency of 2000W pulse cleaning machine by 6000W continuous +1000w pulse.
Based on the same price, the cleaning efficiency will be increased by 2-3 times through process improvement. The utility model has the advantages of improving the cleaning quality, increasing the cleaning efficiency, stabilizing the cleaning process, being suitable for the cleaning of highly reflective materials, and avoiding the shortcomings and shortcomings of a single cleaning.
Since there is no 2000W pulse laser cleaning machine in China, 6000W continuous +1000w pulse can be said to be the highest power laser cleaning equipment that can be put into production and stable use in China.
Principle of laser combined cleaning
The principle of laser combined cleaning mainly uses semiconductor continuous laser as heat conduction output to make the attachments to be cleaned absorb energy to produce gasification and plasma cloud, and form thermal expansion pressure between metal materials and attachments to reduce the bonding force between the two layers.
When the high-energy pulse laser beam is output by the pulse laser, the vibration shock wave will make the attachment with weak adhesion directly separate from the metal surface, so as to realize the rapid laser cleaning.
The application of this technology covers ships, automobile repair, rubber molds, high-end machine tools, tracks, environmental protection, etc. It can remove resin, paint, oil stain, stain, dirt, rust, coating, coating and oxide layer on the surface of objects.
When the high-energy pulse laser beam is output by the pulse laser, the vibration shock wave will make the attachment with weak adhesion directly separate from the metal surface, so as to realize the rapid laser cleaning.
The application of this technology covers ships, automobile repair, rubber molds, high-end machine tools, tracks, environmental protection, etc. It can remove resin, paint, oil stain, stain, dirt, rust, coating, coating and oxide layer on the surface of objects.
The advantage of laser combined cleaning technology is not only the superposition of two lasers, but also the energy utilization ratio is much greater than the simple addition of two heat sources.
In the laser cleaning of thick coating materials, due to the large output of single laser multi pulse energy and the high cost of high-power pulse laser, the laser cleaning of thick coating materials is limited.
However, the composite cleaning of pulse laser and semiconductor laser can quickly and effectively improve the cleaning quality, and the substrate is not easy to cause damage.
In the laser cleaning of high reflective materials such as aluminum alloy, a single laser has the problem of high reflectivity.
However, the combined cleaning of pulse laser and semiconductor laser increases the energy absorption rate of the oxide layer on the metal surface due to the thermal conductivity transmission of semiconductor laser, so that the pulse laser beam can peel off the oxide layer faster, so as to improve the removal efficiency more effectively.
In the laser cleaning of thick coating materials, due to the large output of single laser multi pulse energy and the high cost of high-power pulse laser, the laser cleaning of thick coating materials is limited.
However, the composite cleaning of pulse laser and semiconductor laser can quickly and effectively improve the cleaning quality, and the substrate is not easy to cause damage.
In the laser cleaning of high reflective materials such as aluminum alloy, a single laser has the problem of high reflectivity.
However, the combined cleaning of pulse laser and semiconductor laser increases the energy absorption rate of the oxide layer on the metal surface due to the thermal conductivity transmission of semiconductor laser, so that the pulse laser beam can peel off the oxide layer faster, so as to improve the removal efficiency more effectively.
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