The essence of laser cleaning is the high energy density of the laser beam irradiation to the surface of the workpiece, so that the surface of the workpiece dirt, oxidation, plating or coating, etc. by the heat of the instantaneous melting, ablation, evaporation or stripping, so as to achieve a clean surface of the workpiece without damaging the substrate process, is the ideal choice for a new generation of industrial cleaning technology.
Laser Type Applicable Materials
Laser development at the same time also promote the rapid development of China's laser cleaning technology, laser cleaning technology has also become an indispensable cleaning technology in the industrial, marine, aerospace and other high-end manufacturing fields, including the removal of rubber dirt on the surface of tire molds, the removal of silicone oil contaminants on the surface of gold film and high precision cleaning of the microelectronics industry.
Metal surface rust removal, paint removal, oil removal and removal of the oxide layer is the most current application of laser cleaning field. Between different lasers in the wavelength, power and other important parameters of the differences, different materials, stains on the laser wavelength, power and other requirements are different, in the actual cleaning work need to choose different laser cleaning methods according to the actual situation.
After a large number of experimental verification by MavenLaser process research and development team, MOPA laser, compound laser is the most widely used laser cleaning market, followed by a small number of applications of carbon dioxide lasers, ultraviolet lasers, continuous lasers.
1.MOPA pulsed laser cleaning for various material surface cleaning
The resonant cavity of the MOPA fiber laser system is itself an optical fiber, and the MO (Master Oscillator) is a low-power laser, which is generally chosen for its appropriate wavelength. The low power laser LD (laser Diode) can modulate the output parameters directly by the drive current, and then the signal light generated by the LD is coupled into the PA (Power Amplifier) power amplification system through the pigtail for signal light amplification.
MOPA laser is the most widely used laser cleaning, because the MOPA fiber laser system can be strictly coupled into the system of the seed signal source for amplification, will not change the laser characteristics such as the center wavelength, pulse waveform and pulse width. Therefore, the parameter adjustment dimension is higher and wider, for different application scenarios of different materials, more adaptable and process window interval is larger, to meet the surface cleaning of various materials.
In addition, the MOPA laser has a high laser energy margin, can be improved by improving the laser cleaning device, such as increasing the laser processing spot, with intelligent systems, etc., to achieve the upgrade of laser cleaning equipment. It is worth mentioning that due to the excellent performance and flexible scenario applicability of the MOPA laser, it is especially widely used in new energy batteries and other emerging industries.
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New Energy Power Battery |
Lithium battery pole cleaning, pole pillar cleaning, liquid injection port cleaning, cover cleaning, blue film cleaning, etc. |
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Aerospace |
Cleaning of engine parts before and after welding, cleaning of launch vehicle storage tank before and after welding, paint removal from composite materials, release agent removal, aircraft skin removal, sealant removal, mold cleaning |
| Mold products | Tire molds, encapsulation molds, injection molds, sealing ring molds, food molds, etc. to remove carbon layer |
| 3C Industry | Circuit board selection and paint removal, wafer cleaning, cell phone case paint removal, PVD coating jig cleaning |
| Automotive Manufacturing | Body pre-weld cleaning, wheel cleaning, paint removal from selected areas of the body, silent tires |
| Marine Vessels | Pre-weld and post-weld cleaning, parts paint removal, oil removal cleaning |
| Bridge, highway maintenance | Bridge structural parts paint removal, rust removal, highway guardrail paint removal |
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Rail Transportation |
Aluminum body cleaning before and after welding, wheel pair automatic cleaning, bogie cleaning, motor cleaning, etc. |
| Petrochemicals | Offshore oil platform coating removal, pipeline paint removal, rust removal, etc. |
| Food Industry | Metal baking pans, molds, etc. |
| Vacuum cup | Bottom and wall paint removal of insulated cups |
| Other Industries | Metal oil filter, filter tube cleaning, stainless steel polishing, laser rust removal, oxide removal |
2.Composite laser cleaning, the best choice for paint removal
Laser composite cleaning through the semiconductor continuous laser as a heat transfer output, so that the adhesives to be cleaned absorb energy to produce vaporization, plasma clouds, and the formation of thermal expansion pressure between the metal material and the adhesives, reducing the bonding force between the two layers. When the laser output high-energy pulse laser beam, the resulting vibration shock wave so that the bond is not strong adhesives directly from the metal surface, thus achieving rapid laser cleaning.
Power cell shell paint removal
Laser composite cleaning while continuous laser and pulse laser functional composite, forming a 1 + 1 > 2 processing characteristics. Fast speed, high efficiency, more uniform cleaning quality, for different materials, you can also use different wavelengths of laser cleaning at the same time to achieve the purpose of stain removal.
Paint removal for hairpin motors
At present, laser composite cleaning is widely used in ships, auto repair, rubber molds, high-end machine tools, rail and environmental protection and other fields, effectively remove the object surface resin, paint, oil, stains, dirt, rust, coating, plating and oxide layer.
For example, in the thicker coating material laser cleaning, a single laser multi-pulse energy output, high cost, the use of pulsed laser - semiconductor laser composite cleaning, can quickly and effectively improve the quality of cleaning, and does not cause damage to the substrate; in the aluminum alloy and other highly reflective materials laser cleaning, a single laser reflectivity and other problems. The use of pulsed laser - semiconductor laser compound cleaning, in the role of semiconductor laser thermal conductivity transfer, increase the energy absorption rate of the metal surface oxide layer, so that the pulse laser beam can be faster to strip the oxide layer, so as to more effectively improve the removal efficiency, especially in addition to paint efficiency increased by more than 2 times.
3.Carbon dioxide laser cleaning, the best choice for removing non-metallic materials
CO2 lasers are gas lasers with CO2 gas as the working substance, filled with CO2 gas and other auxiliary gases (helium and nitrogen and a small amount of hydrogen or xenon), which have better directionality, monochromaticity and frequency stability. Since the discharge tube is usually made of glass or quartz material, two common types of CO2 lasers are glass tube CO2 lasers and metal RF tube CO2 lasers.
Gum removal
4.UV laser cleaning for precision devices
The main UV lasers used for laser microfabrication are excimer lasers and all-solid-state lasers. UV laser with short wavelength and high single photon energy can directly break the chemical bonds connected between materials, and the materials are stripped from the surface in the form of gas or particles, and the heat-affected zone generated during processing is small, which has unique advantages in microfabrication, such as Si, GaN and other semiconductor materials, quartz, sapphire and other optical crystals, and polyimide (PI), polycarbonate (PC) and other polymer materials, and can effectively improve manufacturing quality.
Chip pin cleaning
UV laser is considered to be the best laser cleaning solution in the field of precision electronics, its most characteristic fine "cold" processing technology does not change the physical properties of the object at the same time, the surface micro-processing and processing, can be widely used in various industries and fields such as communications, optics, military, criminal investigation, medical. For example, the 5G era has created a market demand for FPC processing. The application of UV laser machine makes it possible for precision cold processing of FPC and other materials.
5.Continuous fiber laser cleaning to remove floating rust from metal surfaces
The continuous fiber laser works by pumping light from the pump source through a reflector coupled into the gain medium, because the gain medium is a rare earth element doped fiber, so the pump light is absorbed, the absorbed photon energy rare earth ion energy level jump and achieve particle number inversion, after the inversion of the particle through the resonant cavity, from the excited state jump back to the ground state, release energy, and form a stable laser output, the biggest advantage is that the light can be continuous.
Cleaning after weldingC
The actual laser cleaning applications, continuous fiber laser application is less, but there are a small number of applications, such as some large steel structures, pipelines, etc., due to the large volume of heat dissipation fast, the substrate damage requirements are not high, then you can choose a continuous laser.
Rust Removal
It is worth mentioning that with the breakthrough and stability of ring spot technology, the ring fiber laser with the advantages of easy process adjustment and simple operation has been widely popularized in the field of welding and cleaning, and after a large number of experiments by the engineers of MavenLaser Process Center, the technology is used to remove floating rust, which can greatly improve the cleaning efficiency.
With the progress of science and technology and the improvement of environmental protection requirements, laser cleaning will participate more deeply and comprehensively in the process of Chinese manufacturing industry iteration, and become the main cleaning method of industry clean production.
Shenzhen Maven Laser Automation Co., Ltd., headquartered in Shenzhen, has its own production plant. Focusing on the field of laser high-tech applications, with the pursuit of productization as the primary purpose, to provide customers with laser cutting, laser welding, laser marking, laser cleaning, laser power supply full set of laser solution-based services, according to customer demand, the development of automated cleaning program to achieve more intelligent cleaning purposes. In the field of laser cleaning machine is a leading position, its products include cabinet type laser cleaning machine, pull rod type laser cleaning machine, back shoulder type laser cleaning machine a variety of uses model laser cleaning machine. Perfect product marketing system and after-sales service system to make the products more competitive, 24 hours at any time to respond to provide you with a chain of products after-sales maintenance services . MavenLaser technology will impress you with the stable quality of technology, reasonable price of service, and become your faithful partner!
Post time: Jan-16-2023
